a nucleus emits a gamma ray of energy 0.511 mev from a state that has a lifetime of 1.0 ns. what is the uncertainty in the energy of the gamma ray? (give units of ev)
Answers
The uncertainty in the energy of the gamma ray is 3.3 x 10⁻¹³ eV.
What is the energy of the gamma ray?Given that,
Energy of gamma ray = 0.511 MeV.
Energy of gamma ray in Joules = 0.511 x 1.6 x 10⁻¹³ J
Energy of gamma ray in Joules = 8.176 x 10⁻¹⁴ J
Formula used:
ΔE × Δt ≥ ℏ/2ΔE ≥ ℏ/2Δt
Where,
ΔE is uncertainty in energy.
ℏ is Planck’s constant.
Δt is lifetime of the nucleus.
ℏ = 6.63 × 10⁻³⁴ Js.
Δt = 1.0
ns = 1 × 10⁻⁹ s
Putting the values in the above formula,
ΔE ≥ (6.63 × 10⁻³⁴ Js)/(2 × 1 × 10⁻⁹ s)
ΔE ≥ 3.315 × 10⁻²⁵ Joule
So,
ΔE in eV = (3.315 × 10⁻²⁵ Joule)/(1.6 × 10⁻¹⁹ Joule/eV)
ΔE in eV = 3.3 × 10⁻¹³ eV.
The uncertainty in the energy of the gamma ray is 3.3 x 10⁻¹³ eV.
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Related Questions
Two loudspeakers in a plane, 5.0 m apart, are playing the same frequency. If you stand 12.0 m in front of the plane of the speakers, centered between them, you hear a sound of maximum intensity. As you walk parallel to the plane of the speakers, staying 12.0 m in front of them, you first hear a minimum of sound intensity when you are directly in front of one of the speakers. What is the frequency of the sound? Assume a sound speed of 340 m/s.
Answers
The frequency of the sound is 68 Hz, which is found by dividing the speed of sound by the wavelength, where the wavelength is determined by the path difference between the two speakers.
To find the frequency of the sound, we need to consider the path difference and the speed of the sound. When you hear maximum intensity, the path difference is a whole number multiple of the wavelength (constructive interference). When you hear minimum intensity, the path difference is a half-integer multiple of the wavelength (destructive interference).
In this case, when you're in front of one speaker, the path difference is half the distance between the speakers (5.0 m / 2 = 2.5 m). This corresponds to a half-integer multiple of the wavelength, meaning (2n + 1) * (wavelength / 2) = 2.5 m, where n is an integer.
Let's consider the smallest value of n, which is 0. Then, the wavelength is 5.0 m.
To find the frequency, we can use the equation:
frequency = speed of sound/wavelength
frequency = 340 m/s / 5.0 m
frequency = 68 Hz
So, the frequency of the sound is 68 Hz.
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In a physics lab, you apply a 34.5 N rightward
force to a 4.52 kg cart to accelerate it across a
horizontal surface at a rate of 1.28 m/s/s.
Determine the friction force acting upon the cart
and coefficient of friction.
Answers
Answer:
Explanation:
The frictional force is
=
28.71
N
Explanation:
Let
F
r
=
frictional force
and
F
=
the force applied
The net force acting on the object is
(
F
−
F
r
)
By Newton's second Law
(
F
−
F
r
)
=
m
a
where,
a
=
the acceleration
and
m
=
mass of the cart
So,
F
−
F
r
=
m
a
F
r
=
F
−
m
a
=
34.5
−
4.52
⋅
1.28
=
28.71
N
light in air reflects off the surface of a puddle of water. is the phase of the reflected wave different than the incoming wave?
Answers
When light travels through air and reflects off the surface of a puddle of water, the phase of the reflected wave is indeed different than the incoming wave. This is because when light reflects off a surface, it undergoes a phase shift of 180 degrees. This means that the peaks of the reflected wave will correspond to the troughs of the incoming wave, and vice versa.
To understand why this happens, it's helpful to think about how waves work. Waves are characterized by their amplitude (height), wavelength (distance between peaks), and phase (position of the wave relative to a fixed point). When a wave reflects off a surface, it encounters a boundary where the medium changes (in this case, from air to water). This boundary causes the wave to undergo a phase shift of 180 degrees, which changes the position of the peaks and troughs of the wave.
So in summary, when light reflects off the surface of a puddle of water, the phase of the reflected wave is different than the incoming wave because of the phase shift that occurs at the air-water boundary.
Yes, the phase of the reflected light wave is different from the incoming wave. When light reflects off a surface like water, a phase change of 180 degrees occurs if the refractive index of the second medium (water) is higher than that of the first medium (air). This phase change results in an inverted reflected wave compared to the incoming wave.
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which of the following actions will cause the relative humidity of an air parcel to increase? select all that apply
a. Keep the parcel’s temperature constant and increase the parcel’s dew point
b. Decrease the parcels temperature and increasethe parcels dew point
c. Keep the parcel’s temperature constant and keep the parcels dew point constant
d. Increase the parcels temperature and increase the parcels dew point
e. Keep the parcels dew point constant and increase the parcels temperature
Answers
The relative humidity of an air parcel will increase if any of the following actions are taken:
Keep the parcel’s temperature constant and increase the parcel’s dew pointDecrease the temperature of the parcel and increase the parcels dew pointIncrease the temperature of the parcel and increase the parcels dew pointKeep the parcels dew point constant and increase the temperature of the parcelWhat is relative humidity?To understand this further, we can look at the formula for relative humidity, which is the amount of water vapor in the air divided by the amount of water vapor that can exist at a particular temperature. When the temperature is kept constant and the dew point increases, the amount of water vapor in the air increases, resulting in an increase in relative humidity.
The followings are the given options and the actions they will take that will cause the relative humidity of an air parcel to increase:
Option A: Keep the parcel's temperature constant and increase the parcel's dew point. This action would increase the RH of the air parcel because it will increase the quantity of water vapor in the air parcel. As the parcel's temperature is constant, the ability of the air to hold water vapor also remains constant.
Option B: Decrease the parcel's temperature and increase the parcel's dew point. This action would also increase the RH of the air parcel. As the temperature of the parcel decreases, the amount of moisture that the air can contain also decreases. When the dew point is raised, the quantity of water vapor in the air parcel rises relative to the amount it can carry.
Option C: Keep the parcel's temperature constant and keep the parcel's dew point constant. In this case, there will be no increase in RH because the quantity of water vapor in the air parcel will remain the same as the ability of the air to hold water vapor remains constant.
Option D: Increase the parcel's temperature and increase the parcel's dew point. Increasing the parcel's temperature will raise the ability of the air to hold water vapor, but it will not increase the amount of water vapor in the air parcel. As a result, the RH of the air parcel will decrease.
Option E: Keep the parcel's dew point constant and increase the parcel's temperature. This action will also decrease the RH of the air parcel as it will increase the amount of moisture that the air can hold. Thus, the relative humidity will decrease.
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Raymond and Julie ar driving to Santa Barbara.
They drive at an average speed of Bomon for
2.5 hours before he stopping for lunch. H
takes them 30 minutes to eat. After lunch
they continue driving or an average speed
of so mon for 3.0 nono . What is their
average speed, in miles
for the
3.5
entive
HID
per hour
Answers
Please help! i need this done by 6am!
choose if mars or Venus are better to make more Earthlike for our future habitation
then give reasons that include:
Gravity on the planet
Temperature on the planet
Surface composition of the planet
Atmosphere of the planet
Required travel time and materials we would need to take to the planet
Answers
Mars has a surface gravity that is about 38% of Earth's, which would make it easier for humans to move around and perform tasks. On the other hand, Venus has a surface gravity that is about 90% of Earth's, which is closer to the gravity we are used to but may cause health problems for humans in the long term.
Temperature on the planet:Mars has a very thin atmosphere, which means that its surface is exposed to extreme temperature fluctuations. The average temperature on Mars is around -80 degrees Fahrenheit, but it can reach up to 70 degrees Fahrenheit in some areas during the day. Venus, on the other hand, has a thick atmosphere that traps heat and creates a runaway greenhouse effect, leading to average temperatures of around 864 degrees Fahrenheit.
Surface composition of the planet:Both Mars and Venus have rocky surfaces, but their compositions are quite different. Mars has a lot of iron oxide (rust), which gives it its reddish color, while Venus has a lot of volcanic rocks and sulfuric acid in its atmosphere. This could make it more difficult to extract resources from Venus and use them to make the planet more Earthlike.
Atmosphere of the planet:As mentioned earlier, Mars has a very thin atmosphere, which means that it has very little protection from solar radiation and is not able to retain heat very well. Venus, on the other hand, has a thick atmosphere that is mostly composed of carbon dioxide, which could potentially be used to create a greenhouse effect that would warm up the planet.
Required travel time and materials we would need to take to the planet:Both Mars and Venus would require a significant amount of resources and time to make them more Earthlike. Mars is closer to Earth and has been the focus of more exploration and research, which means that we have a better understanding of its characteristics and what would be required to make it more hospitable for humans. However, Venus's thick atmosphere and closer proximity to the Sun could make it a better candidate for terraforming, as it would be easier to create a greenhouse effect and warm up the planet.
In summary, both Mars and Venus have their advantages and disadvantages when it comes to making them more Earthlike for human habitation. Mars has a lower gravity and a thinner atmosphere, but its extreme temperature fluctuations and iron-rich surface could make it a more challenging candidate. Venus has a higher gravity and a thick, mostly carbon dioxide atmosphere, but its extremely high temperatures and difficult surface composition could also pose significant challenges. Ultimately, the decision of which planet to focus on would depend on a variety of factors, including the resources and technology available, the goals of the mission, and the potential benefits and risks associated with each option.The weight of a cart with a mass of 150 kg is _ N
Answers
Answer:
Given: mass = 150 Kg
Acceleration due to gravity = 10m/s²
Force = x N
Force = Mass × Acceleration due to gravity
Force = 150 kg × 10 m/s²
Force = 1500 kgm/s² = 1500 N
The formula for calculating weight is F = m × 9.8 m/s2, where F is the object's weight in Newtons (N) and m is the object's mass in kilograms. The Newton is the SI unit for weight, and 1 Newton equals 0.225 pounds.
\(F = m × 9.8m/s² \\ F = 150 \times 9.8/ {s }^{2} \\ F = 1470 N\)
how much time would it take for the sound of thunder to travels at a speed of 330m/seconds
Answers
Two skaters stand facing each other. One skater’s mass is 60 kg, and the other’s mass is 72 kg. If the skaters push away from each other without spinning and the 60 kg skater speed it 5.0 m/s the 72kg skaters speed will be what?
Answers
The final velocity of the 72 kg skater is -4.17 m/s. The negative sign indicates that the skater is moving in the opposite direction to the 60 kg skater, as expected.
m1 * v1_final + m2 * v2_final = 0
60 kg * 5.0 m/s + 72 kg * v2_final = 0
Solving for v2_final, we get:
v2_final = -(60 kg * 5.0 m/s) / 72 kg = -4.17 m/s
Mass is a fundamental concept in physics that refers to the amount of matter in an object. It is a scalar quantity that has a magnitude but no direction. Mass is typically measured in units of kilograms (kg) in the International System of Units (SI).
Mass is a property of an object that resists any change in its motion, whether it is at rest or in motion. This is described by Newton's Second Law of Motion, which states that the force applied to an object is proportional to its mass and its acceleration. This relationship is often expressed as F=ma, where F is the force applied, m is the mass of the object, and a is its acceleration.
Mass is also related to energy through the famous equation E=mc², where E is the energy of an object, m is its mass, and c is the speed of light in a vacuum.
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3 Draw energy transfer diagrams
for:
a) winding up a clockwork car
b) letting a clockwork car run
c) letting a battery-powered car
run.
Answers
Answer:
The outline of the energy transfer are;
a) Kinetic energy → Clockwork spring → Potential energy
b) Potential energy in clockwork car → Clockwork spring coil unwound → Clockwork car run
c) Chemical potential energy → Batteries in the car → Electric motors → Kinetic energy
Please find attached the drawings of the energy transfer created with MS Visio
Explanation:
The energy transfer diagrams are diagrams that can be used to indicate the part of a system where energy is stored and the form and location to which the energy is transferred
a) The energy transfer diagram for the winding up a clockwork car is given as follows;
Mechanical kinetic energy is used to wind up (turn) the clockwork car such that the kinetic energy is transformed into potential energy and stored in the wound up clockwork as follows;
Kinetic energy → Clockwork spring → Potential energy
b) Letting a wound up clockwork car run results in the conversion of mechanical potential energy into kinetic (energy due tom motion) energy as follows;
Potential energy in clockwork car → Clockwork spring coil unwound → Clockwork car run
c) The energy stored in the battery of a battery powered car is chemical potential energy. When the battery powered car runs, the chemical potential energy produces an electromotive force which is converted into kinetic energy as electric current flows from the batteries
Therefore, we have;
Chemical potential energy → Batteries in the car → Electric motors → Kinetic energy
Which term describes the repeated arrangement of the same molecule? (1 point)
O molecular model
O atoms
O bonds
o extended structure
Answers
The term which best describes the repeated arrangement of the same molecule is: D. extended structure.
An atom can be defined as the smallest unit which comprises the matter that forms all chemical elements. Thus, atoms are typically the fundamental building blocks of matter and as such determines (defines) the structure of a chemical element.
Generally, atoms are typically made up of three (3) distinct particles and these are;
Protons.Neutrons.Electrons.In Chemistry, a molecule can be defined as a group of two or more atoms that are chemically bonded together by means of shared electrons and represents the smallest fundamental unit of a substance or chemical compound.
Basically, when the same molecule are arranged repeatedly it is typically referred to as an extended structure.
In conclusion, the term which best describes the repeated arrangement of the same molecule of a chemical compound or substance is an extended structure.
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A mover uses a ramp to load a crate of nails onto a truck. The crate, which must be lifted 1.5 m from the street to the bed of the truck, is pushed along the length of the ramp. If the ramp is 4.5 m long and friction between the ramp and crate can be ignored, what is the mechanical advantage of the ramp?
Answers
Answer:
3Explanation:
Using the efficiency formula. Efficiency = MA/VR * 100%
MA = Mechanical Advantage
VR = velocity ratio = \(\frac{distance\ moved\ by\ effort}{distance\ moved\ by\ load}\)
Distance moved by effort = 4.5m
distance moved by load = 1.5m
VR = 4.5/1.5 =3
Assuming efficiency is 100% (since friction can be ignored)
100% = MA/3 * 100%
1 = MA/3
MA = 3*1
MA = 3
Mechanical Advantage of the ramp is 3
The force that acts on an object lying on a surface, acting in a direction perpendicular to the surface is called ____________
Answers
If it is on water thrust
the approach to motivation emphasizes the role of species-specific instincts in directing behavior.
Answers
The approach to motivation that emphasizes the role of species-specific instincts in directing behavior is called the Instinct Theory of Motivation.
This theory suggests that certain innate, fixed patterns of behavior, known as instincts, are responsible for motivating actions and reactions within specific species. These instincts have evolved over time due to their contribution to the survival and reproductive success of the species.
For example, the fight or flight response, which is a common instinct among many animals, helps protect them from predators and ensures their survival. Another example is the maternal instinct observed in many mammal species, which promotes nurturing and protective behaviors towards their offspring, ultimately benefiting their survival and reproduction.
Instinct Theory of Motivation has its roots in the work of early psychologists like William James and Sigmund Freud, who believed that instincts played a significant role in shaping human behavior. However, it is important to note that while instincts do influence motivation, they are not the only factors at play. Other approaches, such as the drive-reduction theory and cognitive theories, also contribute to our understanding of motivation and behavior.
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A cannonball is shot from level ground with a velocity of 240.0 m/s at an angle of 32 degrees. How long does the ball take to hit the ground?
Answers
The time of flight is obtained as 25.9 seconds
What is the time of flight?The time of flight is the time taken to move the object that have been projected along the parabolic path. In this case, we have a cannonball that have been fired from level ground with a velocity of 240.0 m/s at an angle of 32 degrees.
We know that from the question
T = 2usinθ/g
T = time of flight
u = initial velocity
θ = angle of projection
g = acceleration
T = 2 * 240.0 m/s * sin 32 degrees/9.8 m/s^2
T = 25.9 seconds
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A marble was sent down a ramp into a solo cup. The first time the solo cup moved 20 cm. The second time the solo cup moved 24 cm. The third time the cup moved 16 cm. What is the average movement of the cup?
Answers
Answer:
20
Explanation:
The average of the movement is 20+24+16/2 = 20cm
Answer:
.................................................................................................... .................
Explanation:
66yuvuvuvyftf5v7bictdtv7hivyftf5d5v7bibivydrd5gu ihibjbibibibibibibibibibibibibibibinonononononononompmpmpmpmpmpmpmpmpmpmpmpmpmpmpmpmpmpnininibibibuvuvuvuvycycyc6ctctcrxrxrzezea2ax4xtctcycyvyvyv7hibibinonobuvt
Calculate the energy of a photon travelling with a velocity of 3 × \(10^{8}\) m/s and having a wavelength of 400 nm.
Answers
Answer:
the energy of the photon is 4.9695 x 10^-19 joules.
Step by step explanation:
The energy of a photon can be calculated using the formula:
E = h * c / λ
where E is the energy of the photon in joules, h is Planck's constant (6.626 x 10^-34 J*s), c is the speed of light (3 x 10^8 m/s), and λ is the wavelength of the photon in meters.
First, we need to convert the wavelength from nanometers to meters:400 nm = 400 x 10^-9 m
Now we can plug in the values into the formula:
E = (6.626 x 10^-34 J*s) * (3 x 10^8 m/s) / (400 x 10^-9 m)
E = 4.9695 x 10^-19 J
Therefore, the energy of the photon is 4.9695 x 10^-19 joules.
the short- circuit current multiplier for agiven transformer impedance is found by dividing 100 by the ----
Answers
The short-circuit current multiplier for a given transformer impedance is found by dividing 100 by the transformer impedance value.
The short-circuit current multiplier is a crucial factor in analyzing the behavior of transformers under fault conditions. It helps determine the magnitude of the fault current relative to the rated current of the transformer. The multiplier is obtained by dividing 100 by the transformer impedance value.
Transformer impedance represents the opposition to the flow of current within the transformer windings and is typically expressed as a percentage. It includes both the resistance and reactance components of the transformer. When a fault occurs in the system, the fault current tends to flow through the path of least impedance, which is often the transformer winding with the lowest impedance value.
By dividing 100 by the transformer impedance, we obtain the short-circuit current multiplier. This multiplier provides an indication of how much the fault current will be amplified compared to the rated current of the transformer. For instance, if the transformer impedance is 5%, the short-circuit current multiplier would be 100/5 = 20. This means that the fault current will be 20 times higher than the rated current.
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9. How much time is needed to produce 410 J. of work if 82 W. of power is used when turning on an air conditioner?
Answers
The time required to generate a 410 J of energy if a power of 82 W is used by the air conditioner is 5.0 seconds,
What is the time needed to produce the given amount of energy?Power is the quantity of energy transferred per unit time. It can be expressed as;
Power = Energy / Time
Given the data in the question;
Work done / energy of air conditioner E = 410 J = 410kgm²/s²Power P = 82 W = 82kgm²/s³Time t = ?To determine the time needed, plug the given values into the formula above and solve for time.
Power = Energy / Time
Time = Energy / Power
Time = 410kgm²/s² / 82kgm²/s³
Time = 5.0s
Therefore, the required time is 5.0 seconds.
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the mutual induction of electric and magnetic fields can produce
Answers
The mutual induction of electric and magnetic fields can produce: energy
The mutual induction of electric and magnetic fields can produce energy. This phenomenon is known as electromagnetic induction, which was discovered by Michael Faraday in the 1830s. When a changing magnetic field passes through a conductor or a coil of wire, it induces an electric current in the wire. Similarly, when a current flows through a wire, it generates a magnetic field around it.
Electromagnetic induction is the basis for the operation of many electrical devices, such as generators and transformers. In a generator, mechanical energy is used to rotate a coil of wire within a magnetic field, resulting in the production of an electric current. This current can then be used to power electrical devices.
The mutual induction of electric and magnetic fields does not directly produce sound or light. However, the energy generated through electromagnetic induction can be converted into other forms, such as electrical energy powering light bulbs or sound-producing devices. Therefore, the correct answer is that the mutual induction of electric and magnetic fields can produce energy.
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The mutual induction of electric and magnetic fields can produce:
sound
light
energy
none of the above
An element is an electric heating unit is applied to 232-volt power supply. The current flow through the element is 19 amperes. What is the resistance of the element?
8 ohms
10 ohms
12 ohms
14 ohms
Answers
The resistance of the electric heating element can be determined using Ohm's law, which states that resistance (R) is equal to voltage (V) divided by current (I). In this case, the voltage across the element is given as 232 volts and the current flowing through it is 19 amperes. The correct option is 12 ohms.
Applying Ohm's law, we calculate the resistance as:
R = V / I
R = 232 volts / 19 amperes
R ≈ 12 ohms
Therefore, the resistance of the element is approximately 12 ohms. This means that for every ampere of current flowing through the element, there is a voltage drop of 12 volts. The resistance value of 12 ohms indicates that the element has a moderate level of electrical resistance, which allows it to generate heat efficiently when current flows through it. Thus, the correct option is 12 ohms.
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A wire is placed between the poles of a horseshoe magnet. There is a current in the wire in the direction shown, and this causes a force to act on the wire.
Answers
In which part of the wave are the particles of the medium closer together?A.rarefactionsB.compressionsC.solidsD.liquids
Answers
In the wave, the particles of the medium are closer together in B. compressions.
Particles in a compressional wave compress and expand in the direction of wave propagation. In a compressional wave, when a force is exerted on one end of the chain of particles, it is transferred from one particle to the next, resulting in a disturbance in the medium that spreads outward. As a result, compressions and rarefactions travel through the medium, causing the particles to be either close together or far apart.
In a compressional wave, the particles in the medium vibrate parallel to the direction of wave propagation. This is due to the fact that the direction of particle movement in a compressional wave is in the same direction as the wave's motion. The particles in the medium are closer together in compressions, whereas they are further apart in rarefactions. The reason for this is that the particles in a medium are pushed together by the wave's pressure and then pushed apart as the wave continues. Therefore, the correct option is B.
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For transmissivity (T) = 2500 m2/day, storativity (S) = 1.0 x 10-3, and a pumping rate
(Q) = 500 m3/day, calculate drawdowns in a confined aquifer (isotropic, homogeneous, transient
condition) at observation wells located (i) 10 m and (ii) 50 m at t = 150
Answers
Answer:
The drawdown in a confined aquifer under transient conditions can be estimated using the Theis solution for the non-equilibrium radial flow of water. This solution is given by:
s = Q / (4πT) * W(u),
where s is the drawdown, Q is the pumping rate, T is the transmissivity, and W(u) is the well function (also called the Theis function) which depends on the variable u, where:
u = r²S / (4Tt),
where r is the distance from the pumping well and t is the time since pumping began.
Given T = 2500 m²/day, S = 1.0 x 10-3, and Q = 500 m³/day, we can calculate the drawdown at 10 m (r1 = 10 m) and 50 m (r2 = 50 m) for t = 150 days.
For (i) r1 = 10 m:
u1 = r1²S / (4Tt) = (10 m)² * 1.0 x 10-3 / (4 * 2500 m²/day * 150 days) = 0.000667
s1 = Q / (4πT) * W(u1) = 500 m³/day / (4π * 2500 m²/day) * W(0.000667).
For (ii) r2 = 50 m:
u2 = r2²S / (4Tt) = (50 m)² * 1.0 x 10-3 / (4 * 2500 m²/day * 150 days) = 0.01667
s2 = Q / (4πT) * W(u2) = 500 m³/day / (4π * 2500 m²/day) * W(0.01667).
Explanation:
Unfortunately, the well function W(u) cannot be evaluated directly without more specialized knowledge or tools. The well function is related to the exponential integral function, which requires numerical computation. You would typically use a table of values, a calculator with this function, or a computer program to evaluate it. After obtaining W(u), multiply it by the remaining fraction to find the drawdowns.
What, if any, of these collection and packaging techniques is incorrect?
i. one individual should be designated as evidence collector to ensure evidence is collected in a consistent manner
ii. similar pieces of evidence are to be placed in shared containers, sealed and labeled.
iii. if there is a body, the collection of the body is done by the coroner or medical examiner
Answers
Answer:
I will say that no 1 is incorrect
Explanation:
no 1 is incorrect because one person cant confidently and effectively carry out an investigation there should be a collective work so that when ever there is a mistake and the one leading does not notice it the sub ordinates will and it will be corrected
you have an open tube that is 1.7m long what is the fundemental frequency and wavelength of the tube
Answers
Special ways that animals' bodies work to help them survive in whatev
condition they're in, such as camels in the desert conserving water and
able to go days without drinking is what type of adaptation? *
Answers
Answer:
Physiological – special ways that animals' bodies work to help them survive in whatever condition they're in, such as camels in the desert conserving water and being able to go days without drinking.
Explanation:
If you apply a force of 10 N to a box and push it 10 min 10 s. how much power didyou deliver?
Answers
10 watt power will be delivered to push the box for 10 min 10 seconds by applying force of 10N to a box .
What is power and how much is delivered to push the box for 10 minutes 10 second?Power is the energy we exert per unit time. Also power is the product of voltage supply and current.Though power have lots of definitions in its own way , here we talk about the power which is the work unit time.Given is the force which is 10 N and the time that is 10 min 10 second .Now applying the formula P= work/time , that is 100Nm/10s = 10 watt.Work have been calculated as the product of force and displacement = 10N X10m =100Nm.To know more about power visit:
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2/174 determine the velocity of cart a if cylinder b has a downward velocity of 2 ft/sec at the instant illustrated. the two pulleys at c are pivoted independently.
Answers
The velocity of cart A is 2 ft/sec. The velocity of cart A can be determined by analyzing the motion of the pulleys and cylinders in the system.
Given that cylinder B has a downward velocity of 2 ft/sec at the instant illustrated, we need to find the velocity of cart A.
To do this, we can consider the relationship between the pulleys and the cylinders. Since the pulleys at C are pivoted independently, the motion of one pulley affects the motion of the other.
Let's assume that the pulley connected to cart A has a radius of rA and the pulley connected to cylinder B has a radius of rB.
Since the pulleys are connected by a belt, the distance traveled by cart A will be equal to the distance traveled by cylinder B.
We can use the formula for the distance traveled by a point on the circumference of a circle to calculate the distance traveled by both cart A and cylinder B:
Distance = radius x angle (in radians)
Let's assume that cylinder B has rotated an angle of θ radians. This means that cart A has also traveled a distance of θrA.
Given that the radius of cylinder B is rB, we can write:
θrB = θrA
Since the angle θ is the same for both sides, we can cancel it out:
rB = rA
Therefore, the velocity of cart A is equal to the velocity of cylinder B. In this case, the velocity of cart A is 2 ft/sec.
So, the velocity of cart A is 2 ft/sec.
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An element is highly conductive, highly reactive, soft, and lustrous. The element most likely belongs to which group?(1 point)
transition metals
noble gases
metalloids
alkali metals
Answers
Answer:
Alkali metals
Explanation:
Elements in this group are highly reactive, soft, lustrous and highly conductive.
An element which is highly conductive, highly reactive, soft, and lustrous is most likely an alkali metal.
Alkali metals are in group 1 of the Periodic table which means that they have only a single valence electron.
This causes them to be soft and highly reactive because:
The single valance electron leads to weak bonds amongst the element's atoms which makes them softThe elements want to lose the single valance electron so as to become stable so they will react with other elements to give away the electron.Examples of alkali electrons include:
Lithium Sodium Potassium etcIn conclusion therefore, alkali metals are highly reactive and soft and so the element described above is most likely an alkali metal.
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