Answers
Answer:
Oxygen is...
Explanation:
a substance, is an element.
Related Questions
How do you solve this??
Answers
The change in momentum of the object will be 20 kg m/s
change in momentum = final momentum - initial momentum
= mass* velocity (final) - mass* velocity (initial)
= m ( v (final) - v (initial) )
= 1 ( 10 - ( -10 ))
= 20 kg m/s
The change in momentum of the object will be 20 kg m/s
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How do you stay hydrated during warm-up and scheduled activity?
Answers
Answer:
In order to stay hydrated during warm-up(s) drink 8oz of water 20-30 mintues before you start exercising or during your warm-up(s), make sure you drink 7 to 10 oz of water every 10 to 20 minutes during exercise, and drink 8oz of water no more than 30 minutes after you exercise.
In order to stay hydrated during scheduled activity(s) drink 17 to 20 oz of water 2 to 3 hours before you start to exercise, like said before drink 8 oz of water 20 to 30 minutes before you start exercising or during your warm-up(s), drink 7 to 10 oz of water every 10 to 20 minutes during exercise, also said before drink 8 ounces of water no more than 30 minutes after you exercise.
Answer: My scheduled activity was one hour of softball practice. I play catcher, so my thighs and knees take a lot of abuse from kneeling and standing. The lunges were excellent at preparing my thighs for softball. The high knees exercise and arm pumping didn’t feed into softball too well. I suppose that they might help me with base running.
Explanation: EDMENTUM
At the initial height of 40cm and temperature of 25°C, what change in temperature (AT) is needed for the liquid to rise to a height of 49cm?
Answers
Answer:
The answer to your problem is, The change in temperature required is ΔT = ΔV/Vγ
Explanation:
ΔT = ΔV/Vγ
ΔV = 49 - 40 = 9cm
V = 40 cm
γ is unknown since it cannot be calculated due to error in values.
Thus the answer to your problem is, The change in temperature required is ΔT = ΔV/Vγ
Elia thinks his organized personality comes from his mother always giving him dessert on days he cleaned his room. This best fits with which perspective on personality?
humanistic
learning
biological
trait
Answers
Answer:
learning
Explanation:
a trapeze is a short horizontal bar held up by two vertical ropes on either side. An acrobat with a mass of 60 kg provides a 588 N downward force on the bar. Each of the two ropes provide an upward force of 349 N. What is the upward acceleration of the acrobat?
Answers
The upward acceleration of the acrobat is 1.833 m/s².
What is acceleration?Acceleration is rate of change of velocity with time. Due to having both direction and magnitude, it is a vector quantity. Si unit of acceleration is meter/second² (m/s²).
Given parameters:
Mass of the acrobat; M = 588 N.
Weight of the acrobat acting downwards; W = 588 N.
Upward force provided by each of the two ropes; f = 349 N.
Hence, net force acting on the acrobat in upward direction = 2f -w
= (2×349 - 588 ) N.
= 110 N.
Hence, the upward acceleration of the acrobat is = net force/ mass
= 110/60 m/s².
=1.833 m/s².
So, the upward acceleration of the acrobat is 1.833 m/s².
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Which describes an interaction in which organisms work together so that all organisms in the group benefit? cooperation parasitism commensalism competition
Answers
Answer:
Cooperation
Explanation:
Cooperation: Both organisms benefit in the relationship.
Parasitism: One organism benefits and the other is harmed in this relationship.
Commensalism: One organism benefits, while the other neither benefits of is harmed.
Competition: Organisms compete for resources.
The option that describes an interaction in which organisms work together so that all organisms in the group benefit is known as Cooperation.
What is Species interaction?Species interaction may be defined as a type of process through which the population of one species interacts with the population of other species that significantly lives in the same locality. This process either benefits or harm the population.
The categories of species interaction are as follows:
Cooperation: It is a type of +,+ interaction where both organisms benefit in the relationship. This is also known as mutualism. Parasitism: It is a type of +,- interaction where one organism benefits and the other is harmed. Commensalism: It is a type of +,0 interaction where one organism benefits, while the other neither benefits nor is harmed.Competition: It is a type of -,- interaction where both organisms are harmed and compete for the same resources.Therefore, the option that describes an interaction in which organisms work together so that all organisms in the group benefit is known as Cooperation.
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A 1 000 kg car is pulling a 300 kg trailer. Together, the car and trailer move forward with an acceleration of 2. 15 m/s². Ignore any force of air drag on the car and all friction forces on the trailer. Determine (a) the net force on the car
Answers
(a) A 1 000 kg car is pulling a 300 kg trailer, together the car and trailer move forward with an acceleration of 2. 15 m/s² the net force acting on the car (and trailer) is approximately 2,795 Newtons (N).
To determine the net force on the car, we can use Newton's second law of motion, which states that the net force acting on an object is equal to the product of its mass and acceleration.
The total mass of the car and trailer combined is the sum of their individual masses: 1,000 kg + 300 kg = 1,300 kg.
The acceleration of the car and trailer system is given as 2.15 m/s².
Using Newton's second law:
Net force = mass × acceleration
Net force = 1,300 kg × 2.15 m/s²
Net force ≈ 2,795 N
Therefore, the net force acting on the car (and trailer) is approximately 2,795 Newtons (N).
This net force is responsible for accelerating the combined mass of the car and trailer in the forward direction. It represents the sum of all external forces acting on the system, such as the force exerted by the car's engine and the tension in the connection between the car and trailer.
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What is the symbol F g mean
Answers
Answer:
Disambiguation
Explanation:
Fg is an abbreviation used in physics to describe the amount of force exerted by gravity on an object, normally represented in units such as the newton.
Answer:Gravitational forces
Explanation:Is used in physics, used when asked to calculate the the force attracted to the nucleus
A person standing on the edge of a high cliff throws a rock straight up with an initial velocity of 24.8 m/s . The rock misses the edge of the cliff as it falls back to earth. Calculate the position of the rock 5.66 seconds after it is thrown.
Answers
5.66 seconds after it is thrown, the position of the rock is approximately 157.266 meters below the initial position at the edge of the cliff.
To calculate the position of the rock 5.66 seconds after it is thrown, we can use the equations of motion.
First, let's break down the problem into two parts: the upward motion and the downward motion of the rock.
1. Upward motion:
During the upward motion, the acceleration due to gravity acts in the opposite direction of the initial velocity. We can use the equation of motion for displacement:
s₁ = u₁t + (1/2)at²
where s₁ is the displacement, u₁ is the initial velocity, t is the time, and a is the acceleration.
Since the rock is thrown straight up, the initial velocity u₁ is 24.8 m/s, the acceleration a is -9.8 m/s² (taking it as negative due to the opposite direction), and the time t is 5.66 seconds.
Plugging in the values:
s₁ = (24.8 m/s)(5.66 s) + (1/2)(-9.8 m/s²)(5.66 s)²
s₁ = 140.448 m + (-78.633 m)
s₁ = 61.815 m
2. Downward motion:
During the downward motion, the rock is in free fall, so we can use the equation for displacement again:
s₂ = u₂t + (1/2)at²
where s₂ is the displacement, u₂ is the final velocity (which is the negative of the initial velocity due to the change in direction), a is the acceleration due to gravity (taking it as -9.8 m/s²), and t is the time.
Since the rock starts from rest at its highest point during the upward motion, the final velocity u₂ is -24.8 m/s.
Plugging in the values:
s₂ = (-24.8 m/s)(5.66 s) + (1/2)(-9.8 m/s²)(5.66 s)²
s₂ = -140.448 m + (-78.633 m)
s₂ = -219.081 m
To find the total displacement, we sum the upward and downward displacements:
s_total = s₁ + s₂
s_total = 61.815 m + (-219.081 m)
s_total = -157.266 m
Therefore, 5.66 seconds after it is thrown, the position of the rock is approximately 157.266 meters below the initial position at the edge of the cliff.
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Hi
Please help on question asap if the answer is correct I'll rate you five stars a thanks and maybe even brainliest!
When two light bulbs are connected in series, the resistance in the circuit is increase compared to that with one lightbulb. The increased resistance opposes the flow of current so far fewer electrons pass per second , transferring less energy. The lightbulbs are therefore not as bright as In a circuit with same voltage but only one bulb.
However, when Two lightbulbs are connected in parallel, each loop behaves like a separate circuit . The resistance in each branch is the same as if there were just one light bulb in the whole circuit.there is the same current in each branch of the circuit ,so the bulbs Will light up with the same brightness as a single bulb circuit. The energy stored in the battery will decrease twice as quickly and battery will run out faster than I series circuit.
6) explain the advantages and disadvantages of arranging components in series or parallel.
Answers
Advantages of Components Arranged in Series:
1. Increased resistance: Connecting components in series increases the overall resistance in the circuit. This can be advantageous in situations where you want to limit the flow of current or control the amount of power being dissipated.
2. Voltage sharing: In a series circuit, the total voltage of the power supply is divided among the components. This can be useful when you want to ensure that each component receives a specific voltage.
3. Current consistency: The current remains the same throughout the series circuit, which can be beneficial when you need to ensure a consistent current flow through multiple components.
Disadvantages of Components Arranged in Series:
1. Reduced brightness or performance: As mentioned in the question, when light bulbs are connected in series, the increased resistance reduces the flow of current, resulting in dimmer bulbs or reduced performance in other electrical devices.
2. Single point of failure: If one component in a series circuit fails, it can disrupt the entire circuit and cause all components to stop functioning.
Advantages of Components Arranged in Parallel:
1. Brightness and performance: When components such as light bulbs are connected in parallel, each component receives the full voltage, resulting in brighter bulbs and better performance in other devices.
2. Redundancy: In a parallel circuit, if one component fails, the other components can continue to function independently. This provides redundancy and ensures that the failure of one component does not affect the others.
3. Increased current capacity: Parallel arrangement allows the circuit to handle higher currents, which can be useful in situations where high power or heavy loads are required.
Disadvantages of Components Arranged in Parallel:
1. Increased complexity: Parallel circuits require more wiring and connections, which can make the circuit more complex and harder to manage.
2. Higher cost: Parallel circuits may require more components and wiring, resulting in higher costs for materials and installation.
It's important to consider the specific requirements and constraints of the application when deciding whether to arrange components in series or parallel. Each configuration has its advantages and disadvantages, and the choice depends on factors such as desired current flow, voltage distribution, and reliability.I
The weather map shows some conditions in the atmosphere at noon on a
particular day.
Where would you expect the warmest weather?
A. In the southwest
B. In the northwest
C. In the southeast
D. In the northeast.
Answers
The geographical region where I would expect the warmest weather is: C. in the southeast.
What is a weather map?A weather map can be defined as a type of chart that is typically used to provide information about the average atmospheric condition of a particular geographical region over a specific period of time.
Based on the weather map shown in the image attached below, we can infer and logically deduce that the geographical region where the warmest weather is expected is in the southeast due to its very high atmospheric pressure.
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the (speed) of an object is a vector quantity that tells us the speed and direction of an objects momentum is this correct? If not what is the correct answer
Answers
The statement is incorrect.
The second word in the statement ... the word in (parentheses) ... should be (velocity), not (speed).
Answer:
here is the answer hope it will helo u ....
Why was the geocentric model of our solar system widely accepted until the 16th century?
A.
The model was considered to work in tandem with the ancient Aztec calendar.
B.
Observations had led to the belief that the Sun, Moon, and stars revolved around Earth.
C.
The star catalogue matched the movement of constellations.
D.
No one had yet sailed entirely around Earth to disprove the geocentric model.
Answers
The correct answer is B. Observations had led to the belief that the Sun, Moon, and stars revolved around Earth.
The geocentric model, which placed Earth at the center of the universe with the Sun, Moon, and stars revolving around it, was widely accepted until the 16th century for several reasons. One of the primary reasons was that observations seemed to support this view. For example, it was observed that the stars appeared to move across the sky in a circular path, and it was assumed that this was due to their motion around Earth. Similarly, the Sun and Moon appeared to rise and set each day, which was consistent with their motion around Earth.
The geocentric model was consistent with the prevailing philosophical and religious beliefs of the time, which held that Earth was a special and unique place at the center of the universe. It was not until the development of the heliocentric model, which placed the Sun at the center of the solar system, and the refinement of astronomical observations, that the geocentric model was gradually abandoned.
The correct option is B. Observations had led to the belief that the Sun, Moon, and stars revolved around Earth.
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Why are the orbits of planets only nearly circular and not perfectly circular?
PLEASE HELP!!!!!!!!!!!!!
Answers
Explanation:
this is my answer this is helpful for you
3). If you record a light wave at 400 nm long, what is its frequency?
Pleassee helppp!!
Answers
Answer:
Violet light has a wavelength of ~400 nm, and a frequency of ~7.5*1014 Hz.
Explanation:
Are the units of measure for work and energy different?A.YesB.NoC.Only when power is not usedD.When there is a sale on cheap solar energy......
Answers
No, they are the same
Work is in Jules
Energy is in Jules
How does the period of a wave change if the frequency increases by a factor of three?
Answers
Answer:
Period becomes 1/3 of the original
Explanation:
Period = 1/f if f becomes 3f then period becomes 1/3 of the original
how do all organisms begin life
Answers
Answer:
All organisms begin their lives as single cells.Overtime,these organisms grow and take on the characteristics of their species...All organisms grow,and different parts of organisms may grow at different rates.Organisims made out of only one cell
may change little during their lives, but they do grow
Explanation:
brainlest me please
A teacher performing a demonstration finds that a piece of cork displaces 44.5ml of water. The piece of cork has a mass of 11.1g. What is density of the cork
Answers
Explanation:
Density = mass / volume
ρ = 11.1 g / 44.5 mL
ρ = 0.249 g/mL
A board of mass 4.0 kg is used as a seesaw. Mass A in on the left end of the seesaw and is 30 kg. It is 25 m from the pivot point, orfulcrum. The pivot is at the center of gravity of the board. At what distance, x, to the right of the pivot must a mass of 25 kg be located tobalance the seesaw? Answer with no units and to correct sig. fig.
Answers
Given data
The mass of the board is mb = 4 kg
The mass of block A is mA = 30 kg
The mass of the block B is mB = 25 kg
The location distance of block A from the pivot point is d = 25 m
The location distance of block B from the pivot point at the right end is x.
The figure for the above configuration can be drawn as follows:
Taking the moment about the pivot point, the expression is written as follows:
\(\begin{gathered} m_A\times d-m_B\times(x)=0 \\ m_A\times d=m_B\times x \\ x=\frac{m_A\times d}{m_B} \end{gathered}\)Substitute the value in the above equation.
\(\begin{gathered} x=\frac{30\text{ kg}\times25\text{ m}}{25\text{ kg}} \\ x=30\text{ m} \end{gathered}\)Thus, the distance at which it must be located in the right end from the pivot point is 30 m.
Which law of thermodynamics does each of the following scenarios violate (if any)?
A machine that can turn 1000J of heat directly into 1000J of electricity
1.
The first law of thermodynamics
2.
The second law of thermodynamics
3.
The third law of thermodynamics
4.
It is allowed
Answers
Answer: The scenario violates the second law of thermodynamics.
Explanation: The second law states that heat cannot be converted into work without some loss of usable energy, and that the amount of usable energy in a closed system will always decrease over time. Therefore, the machine described in the scenario cannot exist because it would violate the second law by converting all of the heat into electricity without any loss of usable energy.
The speed of light is 300,000 kilometres per second. This number isn't easy to get a feel for but it's good it's so fast because it allows us to see things instantly on Earth without waiting for the light to arrive.
The Sun is far enough away that light takes an appreciable time to travel to us. Assuming the sun is 150,000,000 kilometres away, how long would it take us to realize if the sun suddenly stopped shining?
Answers
Answer:
499 seconds or a little over 8 minutes
Explanation:
~150 million km/ 300,000 km per second = 500 seconds
Bob punts a football 1m above the ground, at an angle of 37° with respect to the horizontal direction. Alice is 50m from Bob and starts to run towards the ball when the ball is kicked. The initial speed of the ball is 20m/s.
Required:
Determine the minimum speed of Alice so that she can make the catch before the ball hits the ground.
Answers
Answer:
The value is \(v = 3.75 \ m/s \)
Explanation:
From the question we are told that
The height of the ball above the ground is \(h = 1 \ m\)
The angle is \(\theta = 37 ^o\)
The distance of Alice from Bob is d = 50 m
The initial speed of ball is u = 20 m/s
Generally the height of the ball is mathematically represented as
\(h = -u sin(\theta)t + \frac{1}{2} (g) t^2\)
=> \(1 = -20 sin(37)t + \frac{1}{2} * 9.8 t^2\)
=> \(1 = -12t + 4.9 t^2\)
=> \( 4.9 t^2 - 12t -1 = 0\)
using quadratic formula we have that
\(t = 2.536 \ s\)
The other value of time obtained is negative so we would not consider it as time can not be negative
Generally the distance the ball traveled in the horizontal direction is
\(s = ucos(\theta ) * t\)
=> \(s = 20 * cos (37 )* 2.536 \)
=> \(s = 40.5 \ m \)
Generally the distance that Alice will travel before she get to the ball is
\(L = d - s\)
=> \(L = 50 - 40.5 \)
=> \(L = 9.5 \ m \)
Generally the minimum speed of Alice is mathematically represented as
\(v = \frac{ 9.5}{ 2.536}\)
\(v = 3.75 \ m/s \)
consider two bodies A and B of masses m1 and m2 moving along the same straight line in the same direction with velocities u1 and u2. the bodies A and B suffer a head on collision when they strike and continue to move along the same straight line of velocities v1 and v2 respectively. Assume the collision is elastic , show that u1 + v1 = u2 + v2
Answers
As the collision is elastic, u₁ + u₂ = v₁ + v₂ must be satisfied.
What is law of momentum conservation?According to the law of momentum conservation, momentum is never created nor destroyed inside a problem domain.
Before collision,
velocity of body A = u₁ velocity of body B = u₂
After collision,
velocity of body A = v₁ velocity of body B = v₂
Hence, according to law of momentum conservation
m₁u₁ + m₂u₂ = m₁v₁ + m₂v₂
As the collision is elastic, total kinetic energy is also conserved.
1/2m₁u₁² + 1/2m₂u₂² = 1/2m₁v₁² + 1/2m₂v₂²
This two equation satisfy that:
u₁ + u₂ = v₁ + v₂
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A 1.67m wooden beam that weighs 100 pounds is resting on two supports. The first support is 0.2 m from one end of the beam, and the second support is 0.3 m from the other end. Assume the axis of rotation would be the center of the beam
a. Find the torques acting on the wooden beam
b. Find the net torque acting on the wooden beam
Answers
The torque acts on a distance of 0.2 m from one end of the beam is 88.96 Nm and the torque acting upon a the distance of 0.3 m from the other end of the beam is 133.4 Nm. Then, the net torque of the mass is 44.48 Nm.
What is torque ?Torque is the rotational analogue of force on an object. It is the measure of force that acts on the object to rotate the object about an axis.
It is the cross product of force and distance from the end of axis. Torques generates the angular momentum in the object.
Given the mass m= 100 pounds.
1 pound = 4.448 N
then Force by the weight F = 100 × 4.448 = 444.8 N.
Then, the torque acts over 0.2 m from one end = F .r = 444.8 × 0.2 = 88.96 Nm.
Then, the torque acts over 0.3 m from one end = F .r = 444.8 × 0.3 = 133.4 Nm.
Therefore, the net torque acting on the mass is 133.4 -88.96 = 44.48 Nm.
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Cs-124 has a half-life of 30.8 s
A) If we have 7.5 μg initially, how many Cs nuclei are present?
B) How many nuclei are present 2.6 min later?
Answers
A) There are 3.70 x 10¹⁶ Cs nuclei present initially and B) There are 2.27 x 10¹⁵ Cs nuclei present 2.6 min later.
A) To solve this problem, we can use the following equation,
\(N = N'2^{\frac{-t}{T_{1/2}}}\)), number of Cs nuclei present is N, initial number of Cs nuclei present is N', elapsed time is t, half-life of Cs-124 is T½. First, we need to convert the initial mass of Cs-124 to the number of nuclei present,
7.5 μg Cs-124(1g/10⁶μg)(6.022x10²³nuclei/1g)
= 4.52 x 10¹⁵ Cs-124 nuclei.
Using the equation above, we can find the number of Cs-124 nuclei present after 0 s,
\(N = 4.52 * 10^{15} * 2^{\frac{-0}{30.8}}}\)
= 4.52 x 10¹⁵ Cs-124 nuclei
Therefore, initially, there are 4.52 x 10¹⁵ Cs-124 nuclei present.
B) After 2.6 min (156 s), we can again use the same radioactivity equation to find the number of Cs-124 nuclei present,
\(N = 4.52 * 10^{15} * 2^{\frac{-156}{30.8}}}\)
N = 1.60 x 10¹⁴ Cs-124 nuclei
Therefore, 2.6 min later, there are 1.60 x 10¹⁴ Cs-124 nuclei present.
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PLEASE HELPPP!!!! i really need help with this report if anyone can!!!!
The U.S. Army is planning to drop supplies from a plane at a refugee camp. The supplies are divided into 700-kilogram parcels, and the parachutes have an area of 100 square meters. The only problem is that the parcels cannot hit the ground at a velocity of more than 5 meters per second without damaging the contents. Are these parachutes suitable for this task?
For the purposes of this exercise, assume that the for the drag coefficient of the parachute is 1.5 and that the air density is 1.22 kilograms per cubic meter. Write a report detailing why these parachutes are or are not suitable and determining the minimum size parachute that can be used in this situation.
Answers
Answer:
search it up
Explanation:
Using the formula for air resistance, we can calculate the force acting on the parachute:
Force = 0.5 x Drag Coefficient x Air Density x Velocity^2 x Area
Assuming that the terminal velocity of the parcels is 5 meters per second, we can calculate the force acting on the parachute as follows:
Force = 0.5 x 1.5 x 1.22 x 5^2 x 100
= 1822.5 N
The weight of the parcels is 700 kg x 9.8 m/s^2 = 6860 N. Therefore, the force acting on the parachute is much less than the weight of the parcels, indicating that the parachutes are suitable for this task.
To determine the minimum size parachute that can be used in this situation, we need to calculate the maximum weight that can be supported by a parachute with an area of 100 square meters. This is known as the payload capacity of the parachute and can be calculated as follows:
Payload Capacity = Area x Drag Coefficient x Air Density x Velocity^2 / 2 x 9.8
Assuming that the maximum weight of the parcels that can be dropped is 700 kg, we can solve for the minimum size parachute as follows:
100 x 1.5 x 1.22 x 5^2 / (2 x 9.8) = 240.9 kg
Therefore, the minimum size parachute required for dropping 700-kilogram parcels at a velocity of less than 5 meters per second is approximately 241 square meters. In conclusion, the 100 square meter parachutes are suitable for this task, and a larger parachute would be required if the weight of the parcels increased.
1) If the red motorcycle and the blue motorcycle have the same speed but the red one has more mass, which one has more momentum? explain
Answers
Answer:
The blue motorcycle.
Explanation:
The red one, since it has more mass, meaning it is denser, would drag on less. Less mass equals more momentum, since there is less holding it down.
15 POINTSSS PLS ANSWER
Why can't you determine the EXACT age of a layer of rock by simply observing fossils in a rock layer? What constraints you in making this determination?
Answers
To determine the exact age of a layer of rock, geologists typically use radiometric dating techniques such as measuring the decay of radioactive isotopes in rocks.
Why can't you determine the EXACT age of a layer of rock by simply observing fossils in a rock layer?While fossils found within a layer of rock can provide important clues about the age of the rock, they cannot determine the exact age of the layer with precision.
This is because the fossil record is incomplete and fossils found in a layer of rock are unlikely to represent all species that existed during a particular time period.
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Two pounds of water vapor at 30 psia fill the 4-ft3 left chamber of a partitioned system. The right chamber has twice the volume of the left and is initially evacuated. Determine the pressure of the water after the partition has been removed and enough heat has been transferred so that the temperature of the water is 40oF.
Answers
Answer:
3.38atm
Explanation:
Using data from the steam table we have that
Moles of water vapour = 907.19 / 18
= 50.4 moles
So
p1 = 30 psi = 30 x 0.68 = 2.04 atm
v1 = 4ft³= 113.2 L
Then from
PV= nRT
Then to find T we use
T1 = p1 V1 / n R
= 2.04 x 113.2 / 50.4 x 0.0821
= 55.8 K
Then to find volume two
v2 = 2v1 + v1
So
3 v1 = 339.6 K
The pressure two we use
P2 = n R T2 / V2
= 50.4 x 0.0821 x 277.6 / 339.6
So we have
= 3.38 atm =