Answer:
FALSE
Explanation:
To answer this question we must clarify that for a given approach to exist there must be a transition between two atomic levels of the material.
For the emission, the transition between two determined states must also occur, therefore the radiation emitted is equal to that absorbed.
Consequently the statement is False
Definition of molecular machine
Can someone please help me it's urgent!
Answer:
6.8 x 10^6
Explanation:
Look up M A T H W A Y it will help you with all of your algebra needs
Two cars have the same weight, but one of the cars has an engine that provides twice the power of the other. Which car can make it to the top of the mountain pass first? Which car does more work to reach the pass?
Answer:
The car with the better engine will make it to the mountain pass first but the car that works harder will be the car with the worse engine
Explanation:
Just like if a average kid were to pick up a 25 pound weight it would be harder compared to a body builder.
Answer:
twice the power reach the top!!1
Explanation:
twice
not
once
twoce
always
nice
a 4.0 m radius circular platform accelerates from rest at 10.0 rad/s2. what is the linear displacement of the edge of the circular platform after 2.0 s?
A 4.0 m radius circular platform accelerates from rest at 10.0 rad/s2. The linear displacement of the edge of the circular platform after 2.0 s will be 80 m .
theta = omega * t + 1/2 * alpha * \(t^{2}\)
omega = angular velocity
alpha = angular acceleration
using equation
theta = omega * t + 1/2 * alpha * \(t^{2}\)
= 0 + 1/2 * 10 * 4 = 20 rad
linear displacement = radius * theta
= 4 * 20 = 80 m
A 4.0 m radius circular platform accelerates from rest at 10.0 rad/s2. The linear displacement of the edge of the circular platform after 2.0 s will be 80 m .
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how does electic motor and generator work?
Answer:
the answer is below
Explanation:
When an electrical current is applied to the motor, the magnets or windings create a magnetic field that both attracts and repels the rotor, causing it to spin. ... Rather than using electricity to create motion, electric generators in Lethbridge convert mechanical energy into electrical energy.
An electric motor is a machine that transforms electrical energy into mechanical energy.
It is made up of a magnet (typically a permanent magnet) and an electromagnet that are both situated close to each other.
The magnet generates a magnetic field, whereas an electromagnet is created by transmitting an electric current via a wire coil.
A magnetic field is created around the coil when an electric current travels through it. The Lorentz force is exerted on the coil as a result of the interaction between the magnetic fields of the coil and the magnet. This force causes rotational motion in the coil, forcing it to revolve.
An electric generator operates on the electromagnetic induction principle.
It is a device that transforms mechanical energy into electrical energy. A generator's essential components are a wire coil and a magnet (often an electromagnet).
The lines of magnetic force travelling through the coil vary when the coil is rotated inside the magnetic field.
Thus, as defined by Faraday's law of electromagnetic induction, this shift in magnetic flux creates an electromotive force (EMF) or voltage in the coil.
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How do quotas impact domestic consumers?.
Rising domestic prices paid by consumers.
Import quotas restrict market access for imported products. The result is usually higher domestic prices paid by consumers. This leads to lower consumer surplus and lower real incomes. It may also reduce the choice consumers have in the market.
Countries sometimes impose quotas on certain products in order to reduce imports and increase domestic production. In theory, quotas increase domestic production by limiting competition with foreign countries. Government programs that enforce quotas are often referred to as protectionist policies. Import quotas limit the number of certain goods that can be imported.
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A runner is jogging in a straight line at a steady Vr= 3.4km/hr. When the runner is L=8km from the finish line, a bird begins flying straight from the runner to the finish line at Vb= 17km/hr(5 times as fast as the runner). When the bird reaches the finish line, it turns around and flies directly back to the runner. What cumulative distance does the bird travel?
Answer:
The cumulative distance that the bird travel is 13.33 Km
Explanation:
Given that,
Velocity of runner = 3.4 km/hr
Distance = 8 km
Velocity of bird = 17 km/hr
Let x is the distance from the origin where the runner run into the bird
We need to calculate the value of x
Using time of runner and bird
\(t_{r}=t_{b}\)
\(\dfrac{d_{r}}{v_{r}}=\dfrac{d_{b}}{v_{b}}\)
Put the value into the formula
\(\dfrac{x}{3.4}=\dfrac{8+(8-x)}{17}\)
\(17x=3.4\times8+3.4(8-x)\)
\(17x=27.2+27.2-3.4x\)
\(17x+3.4x=54.4\)
\(x=\dfrac{54.4}{20.4}\)
\(x=2.67\)
We need to calculate the cumulative distance that the bird travel
Using distance of bird
\(d_{b}=16-x\)
Put the value into the formula
\(d_{b}=16-2.67\)
\(d_{b}=13.33\ km\)
Hence, The cumulative distance that the bird travel is 13.33 Km
if two successive overtones of a vibrating string are 300 hz and 350 hz , what is the frequency of the fundamental?
By applying the fundamental frequency concept, it can be concluded that the frequency of the fundamental is 50 Hz.
The fundamental frequency is the lowest frequency of a periodic waveform counting from zero.
At the \(n^{th}\) harmonic, the frequency is n times the fundamental frequency.
fₙ = nf₁ , where
f₁ = fundamental frequency
We have two successive overtones, let's denote them with fₙ and fₙ₊₁. The difference between their frequencies is given by:
fₙ₊₁ - fₙ = (n+1)f₁ - nf₁
= nf₁ + f₁ - nf₁
= f₁
It implies that the difference is equal to the fundamental frequency.
Now we can use this conclusion to calculate the fundamental frequency of the string:
f₁ = fₙ₊₁ - fₙ
= 350 - 300
= 50 Hz
Thus, the frequency of the fundamental is 50 Hz.
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8) A block of lead has dimensions of 4.50 cm by 5.20 cm by 6.00 cm. The block weighs 1587 g. From this information, calculate the density of lead.
9) 28.5 g of iron shot is added to a graduated cylinder containing 45.50 mL of water. The water level rises to the 49.10 mL mark, from this information, calculate the density of iron.
10) What volume of silver metal will weigh exactly 2500.0 g. The density of silver is 10.5 g/cm3.
Answer:
\(11.3\ \text{g/cm}^3\)
\(7.92\ \text{g/cm}^3\)
\(238.1\ \text{cm}^3\)
Explanation:
8) Volume of lead
\(V=4.5\times 5.2\times 6\\\Rightarrow V=140.4\ \text{cm}^3\)
m = Mass of block = 1587 g
Density is given by
\(\rho=\dfrac{m}{V}\\\Rightarrow \rho=\dfrac{1587}{140.4}\\\Rightarrow \rho=11.3\ \text{g/cm}^3\)
Density of lead is \(11.3\ \text{g/cm}^3\)
9) Volume of lead = Volume of water displaced = (49.1-45.5) = 3.6 mL = \(3.6\ \text{cm}^3\)
m = Mass of iron = 28.5 g
Density is given by
\(\rho=\dfrac{m}{V}\\\Rightarrow \rho=\dfrac{28.5}{3.6}\\\Rightarrow \rho=7.92\ \text{g/cm}^3\)
The density of iron is \(7.92\ \text{g/cm}^3\)
10) m = Mass of silver = 2500 g
\(\rho\) = Density of silver = \(10.5\ \text{g/cm}^3\)
Volume is given by
\(V=\dfrac{m}{\rho}\\\Rightarrow V=\dfrac{2500}{10.5}\\\Rightarrow V=238.1\ \text{cm}^3\)
The volume of silver is \(238.1\ \text{cm}^3\)
a student has built a 10-cm-long pinhole camera for a science-fair project. she wants to photograph her friend, who is 180 cm tall, and have the image on the film be 5 cm high. how far should the front of the camera be from her friend
The distance between both the student's friend and camera is d = 360 cm or 3.6 m.
What is the structure of light?Light not only moves in waves; it also moves with a flow of small particles. Scientists call these tiny particles of light as photons. The packets contain the energy which makes up the energy of the light. The scientists measure something called the relative energy for different types of light.
The light traveling in any one direction in a straight line is called a ray of light. Meanwhile, a group of light rays given out from a source is called a beam of light.
In this case, camera’s height was 10 cm.
The height of student's friend was 180 cm.
That picture on camera has a length of 5 cm.
Now, let d represent the space among both the friend and device's face. Its identical triangles as in figure attached show how the lengths were connected.
So, to find out the distance, we can use the following equation:
5 cm / 10 cm = 180 cm / d
d = 10 cm * 180 cm / 5 cm
d = 360 cm
d = 3.6 m
Hence, the distance among both the friend and device's face is 360 cm or 3.6 m.
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what was the hiker's average velocity during part b of the hike? responses 0.6 km/h north 0.6 km/h north 0.17 km/h south 0.17 km/h south 6 km/h south 6 km/h south 10 km/h southeast
The hiker's average velocity during part B of the hike is 6 km/h South.
Given the following data:
Total distance = 6 km, South.
Start time = 9:45 am
Ending time = 10:45 am
To determine hiker's average velocity during part B of the hike:
First of all, we would determine the total time.
Total time = Ending time - starting time
Total time = 10:45 - 9:45
Total time = 1 hour.
Mathematically, the average velocity is given by the formula:
Average velocity = total distance / total time
Substituting the parameters into the formula, we have;
Average velocity = 6/1
Average velocity = 6 km/h South.
Therefore, the average velocity of the biker is 6 km/h South
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Skylar travels 50 meters N and then goes 30 meters W before coming straight back south 20 meters. What distance did she travel?
Answer:
\(100\ \text{meters}\).
Explanation:
Distance Skylar traveled North is \(50\ \text{meters}\)
Then she traveled \(30\ \text{meters}\) Westward.
After which she traveled \(20\ \text{meters}\) towards the South.
The total distance traveled would be the sum of the distances.
\(50+30+20=100\ \text{meters}\)
The distance traveled by Skylar was is \(100\ \text{meters}\).
Explain how the visible light spectrum is a spectrum within a spectrum.
Answer:
In the visible spectrum of light, the color of the light depends on the frequency. The visible spectrum is always the same for a rainbow or the separated light from a prism. The order of colors is red, orange, yellow, green, blue, indigo, and violet.
Explanation:
a trapeze artis is swinging from a rope that is attached to the ceiling of the foces listed identify which act upon the trapeze artist
Since the trapeze artis is swinging from a rope that is attached to the ceiling of the forces listed, the force that act upon the trapeze artist are: Tension.
The force that are present are:
TensionGravityAir resistant.What kind of motion does a trapeze performer display?A body moving completely back and forth is said to be oscillating. Thus, oscillatory motion is exemplified by circus trapeze.
The weight of the flyer owing to gravity and a centripetal force are the two forces at work on it. The bar on the trapezist's hands creates a centripetal force that the trapeze artist feels as they swing through the air. They are drawn toward the center, or the pivot point, by this force.
Therefore, A trapeze act that swings backward and forth is known as swinging trapeze (or swinging single trapeze). From a static posture, the performer starts to swing, then uses the momentum of the swing to pull off the stunts.
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What color would a star of temperature of 10,000 kelvin be to
human eyes?
a.
red
b.
blue
c.
white
d.
Human eyes couldn't see it as it is outside the visible
wavelengths for humans.
A star with a temperature of 10,000 Kelvin would appear bluish-white to human eyes. The color of a star is determined by its temperature, with hotter stars emitting bluer light and cooler stars emitting redder light.
At 10,000 Kelvin, the star is relatively hot, and it emits a significant amount of blue light. This blue light dominates the star's overall color perception, giving it a bluish hue.
However, it's important to note that stars do emit light across a wide range of wavelengths, including those outside the visible spectrum.
While human eyes are most sensitive to light within the visible range, a star's emission spectrum may extend beyond what we can see. Nonetheless, the visible light emitted by a star with a temperature of 10,000 Kelvin would predominantly appear as a bluish-white color to human observers.
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Wind gusts create ripples on the ocean that have a wavelength of 2.63 cm and propagate at 2.37 m/s. What is their frequency (in Hz)
The given wavelength of the ocean ripples is λ = 2.63 cm and their velocity of propagation is v = 2.37 m/s. Therefore, the frequency of the ripples is 90.08 Hz.
Therefore, to determine the frequency of the ripples, we can use the wave equation: v = fλ
where: v = velocity of the wave f = frequency λ = wavelength Rearranging the formula, we have: f = v/λ
Substituting the given values: v = 2.37 m/s and λ = 2.63 cm = 0.0263 m.
Therefore, f = (2.37 m/s)/(0.0263 m) ≈ 90 Hz.
The frequency of the ocean ripples is approximately 90 Hz. Given that wind gusts create ripples on the ocean that have a wavelength of 2.63 cm and propagate at 2.37 m/s.
To calculate the frequency of the ripples, we will use the formula: f = v/λ where f is the frequency v is the velocity of propagation λ is the wavelength. Substituting the given values, f = 2.37/0.0263= 90.08 Hz
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A toy dart gun contains a spring with a spring constant of 220 N/m. A 0.069 kg dart is pressed 0.07 m into the gun. If the dart got stuck to the spring with what frequency will the dart oscillate (neglect friction)?
If the dart got stuck to the spring then the period of this oscillation will be 0.11 s.
Simple harmonic motion is a specific kind of periodic motion of a body that arises from a dynamic equilibrium between an inertial force that is proportional to the body's acceleration away from the static equilibrium position and a restoring force on the moving object that is directly proportional to the magnitude of the object's displacement and acts towards the object's equilibrium position. If friction or any other energy dissipation is not present, it leads to an oscillation that is represented by a sinusoid and that lasts indefinitely. Oscillating spring perform SHM
The differential equation for SHM is given by,
\(\frac{d^2x}{dt^2} + \sqrt{\frac{k}{m}} x=0\)
the period of the system is given by
ω²=2π√(m/k).
Given,
k = 220 N/m.
m = 0.069 kg
x =0.07
Putting values in the equation, we get
T=2π√(0.069/220)
T = 0.11 s
Hence period the oscillation is 0.11 s.
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The total charge a battery can supply is rated in mA x hr, the product of the current (in mA) and the time (in hr) that the battery can provide this current.
A battery rated at 1000 mA x hr can supply a current of 1000 mA for 1.0 hr, 500 mA current for 2.0 , and so on. A typical AA rechargeable battery has a voltage of 1.2V and a rating of 1800 mA x hr.
For how long could this battery drive current through a long thin wire of resistance 16 ohms?
The battery can drive current through the wire of resistance 16 Ω for about a day, or 24 hours.
We will try and arrive at this answer, by first applying Ohm's Law for getting the current passing and then relating it with the charge passing to arrive at the working time.
We know that current is the rate of flow of charge through a conductor.
So,
I = Q/t
Q = I*t ---> (1)
From the famous Ohm's Law,
V = I*R
where V,I, and R are voltage, current, and resistance respectively.
Here, for a wire of resistance 16Ω with a 1.2V battery,
Current passing through the wire = 1.2/16
= 0.075A
Now, we have to modify the information in the question, as the charge is not derived with mA.hr units, but with coulomb units.
1C = 1A/1s
= 1000 mA * (1/3600)hr
= 10/36 mA.hr
So, 1 mA.hr = 3.6C
For the battery with the rating 1800 mA, the charge in coulombs would be = 1800*3.6 = 6480C
Thus, the time in seconds for the battery to drive current:
Time = Q/I
Time(s) = 6480/0.075
= 86,400s
= 24hrs
Thus, the battery can drive current through the wire for about a day, or 24hrs.
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It is difficult to lift a Large stone but easy to lift a smaller one on the surface of the earth .why ?
Answer:
the weight of the large stone is greater than a small one
Explanation:
because the large stone has greater mass then the small stone.therefore it is difficult to lift the large stone on the surface of the earth but easy to lift the small one
what is the -component of the force exerted by the floor on the block (the friction force)?
The component of the force exerted by the floor on the block is friction force.
The component of the force exerted by the floor on the block (the friction force) is the force that opposes the motion of the block along the floor. This force is called the friction force and it acts in the opposite direction of the block's motion. The magnitude of the friction force depends on the coefficient of friction between the block and the floor, as well as the normal force exerted by the floor on the block. The equation for the friction force is:
Ff = μFN
where Ff is the friction force, μ is the coefficient of friction, and FN is the normal force. So, to find the -component of the force exerted by the floor on the block, you need to know the coefficient of friction and the normal force. Once you have these values, you can plug them into the equation and solve for the friction force.
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A researcher studies the amount of trash (in kgs per person) produced by households in city X. Previous research suggests that the amount of trash follows a distribution with density fe (2) --1/7 torz
The researcher is studying the amount of trash (in kgs per person) produced by households in city X, and previous research suggests that the amount of trash follows a distribution with density force fe (2) --1/7 torz.
The density function fe (2) --1/7 torz indicates the probability distribution of the amount of trash produced by households in city X. This means that the researcher can use this distribution to make predictions about the amount of trash that is likely to be produced by households in the city. The density function can be used to calculate the probability of producing a certain amount of trash per person, given the distribution.
A probability density function is a function that describes the likelihood of a continuous random variable taking on a specific value within a given range. In this case, the continuous random variable is the amount of trash (in kgs per person) produced by households in city X. The pdf provided in the question, f(e) = 1/7 for 2 ≤ e ≤ 9, indicates that the amount of trash follows a uniform distribution between 2 and 9 kgs per person.
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When a group 1 element reacts it… a. Gains two electrons b. Loses two electrons c. Gains one electron d. Loses on electron
When a group 1 element reacts, it loses one electron.
GROUP 1 ELEMENT:
Groups of a periodic table are the vertical columns that indicate the position of an element on the table. Elements in the same group have the same number of valance electrons. Group 1 elements, which include; Sodium (Na), Lithium (Li), Pottasium (K), Rubidium (Rb) etc. are characterized by the possession of one valence electron in their outermost shell. Group 1 elements lose one valence electron to form a positively charged ion when they react with other atoms.Learn more at: https://brainly.com/question/15532102?referrer=searchResults
. A car starts to move from rest has an acceleration of 3m/s².what will be the velocity and distance travelled by the car after 50sec.
Sure! Here are the steps for calculating the velocity and distance traveled by the car after 50 seconds :
Step 1: Calculate the velocity using the equation:
\(v = u + at\)
where:
- \(v\) is the final velocity
- \(u\) is the initial velocity (0 m/s, as the car starts from rest)
- \(a\) is the acceleration (3 m/s²)
- \(t\) is the time (50 seconds)
Substituting the values into the equation:
\(v = 0 + (3 \, \text{m/s²}) \times (50 \, \text{s})\)
Step 2: Calculate the distance traveled using the equation:
\(s = ut + \frac{1}{2}at^2\)
where:
- \(s\) is the distance traveled
- \(u\) is the initial velocity (0 m/s)
- \(a\) is the acceleration (3 m/s²)
- \(t\) is the time (50 seconds)
Substituting the values into the equation:
\(s = 0 \times (50 \, \text{s}) + \frac{1}{2} \times (3 \, \text{m/s²}) \times (50 \, \text{s})^2\)
Now, let's simplify these equations:
\(v = 3 \times 50\)
\(s = \frac{1}{2} \times 3 \times 50^2\)
Calculating the results:
\(v = 150\) m/s
\(s = 3750\) meters
Therefore, after 50 seconds, the car will have a velocity of 150 m/s and would have traveled a distance of 3750 meters.
What is the Law of Conservation of Energy?
Answer:
The law of conservation of energy states that energy can neither be created nor destroyed - only converted from one form of energy to another.
Explanation:
Hope this helped, Have a Great Day!!
A boulder with a mass of 2,500 kg resting on a ledge 200 m above the ground falls. If the boulder’s ME is conserved, what is the speed of the boulder just before it hits the ground?
Answer:
nitial GPE = final KE 2500*10*200 = ½ 2500*v^2 v^2 = 2*10*200 v= 63.24 m/sec
Explanation:
Draw a stationary wave and show the position of node and antinode
I hope that the attachment helps you..
what kind of image is formed by the lenses of the glasses worn by a 68-year-old male who sees an object 2 m away?
Answer:
virtual and reduced -lenses in table = negative focal length = diverging lenses. *Diverging lens= virtual and reduced imagesSource:
C/P AAMC MCAT #2 - QuizletArrange the movement/act/organization in ascending order of occurrence. Energy Supply and Environmental Coordination Act Nature Conservancy Intergovernmental Panel on Climate Change (IPCC) Clean Water Act Federal Water Pollution Control Act Eastern Wilderness Act Water Quality Act Toxic Substances Control Act Clean Air Act Endangered Species Preservation Act ↓ ↓ ↓ ↓ ↓ ↓ ↓ ↓ ↓
Answer:
PLATO!!!!! THESE ARE RIGHT!!! OTHERS ARE NOT CORRECT. I JUST GOT IT RIGHT ON PLATO
Explanation:
1. federal water pollution control act
2.nature conservancy
3. clean air act
4. water quality act
5. endangered species preservation act
6. clean water act
7. energy supply and environmental coordination act
8. eastern wilderness act
9. toxic substance act
10. intergovernmental panel on climate change (IPCC).
A hard drive has 250 gigabytes of storage?
How much does it have measured:
a. In terabytes?
b. In microbytes?
How much work is done on a small car if a 3150 N force is exerted to move it 75.5 m to the side of the road
Answer:
Explanation:
Work = Force times displacement. Therefore,
W = 3150(75.5) so
W = 238000 N*m