a bicycle and a truck have the same momentum p. they experience the same stopping force f. which one stops first?

Answer:

Explanation:

All the work done by the friction force results in a transfer of energy into thermal energy of the box-floor system. This thermal energy flows as heat within the box and floor, ultimately raising the temperature of both of these objects.

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The rocks were moved to the peak by the gravitational potential energy.

1) The potential energy changes when the rocks are moved from the valley to the top.

2) The rocks were moved to the peak by the gravitational potential energy. It results from where the object is located.

3) Kinetic energy is what propels the bricks down the mountain.

4) This is thus because there is no energy at all in the gravitational field.

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Complete question : The entire class goes for a hike. We all pick up rocks from the valley and carry them up to Frenchman Mountain, east of Las Vegas,

where we stack them up on the peak. Subsequently, the pile collapses and all the rocks roll back down the mountain to the valley

below where we originally collected them. Answer the following questions:

1. What energy changed by moving the position of the rocks from the valley to the peak. Explain your answer.

2. What type of energy did the work to move the rocks to the peak? Where did that energy originally come from?

3. What type of energy was used as the rocks rolled back down the mountain?

4. If the rocks were moved from point A (the valley) to point B (the peak) and subsequently rolled back down to point A was the

overall energy used zero since they ended up back where they started? Explain why or why not.

Answer:

The 5-number summary is

1. Median = 0.93 W/kg

2. Lower quartile = 0.69 W/kg

3. Upper quartile = 1.16 W/kg

4. Minimum value = 0.54 W/kg

5. Maximum value = 1.42 W/kg

Explanation:

We are given the measured radiation absorption rates​ (in W/kg) corresponding to 11 cell phones.

1.16 0.85 0.69 0.75 0.95 0.93 1.18 1.17 1.42 0.54 0.57

What is 5-number summary?

A 5-number summary refers to a box plot that basically shows 5 statistical characteristics of a data set.

These statistical characteristics are:    

1. Median

2. Lower quartile

3. Upper quartile  

4. Minimum value  

5. Maximum value  

1. Median:

Arrange the data in ascending order

0.54 0.57 0.69 0.75 0.85 0.93 0.95 1.16 1.17 1.18 1.42

(n+1)/2 gives the median value of the data set.

(11 + 1)/2 = 6th position

Therefore, 0.93 W/kg is the median of the data set.

2. Lower quartile:

Divide the data set into two equal halfs (include median in both if n = odd)

Lower half = 0.54 0.57 0.69 0.75 0.85 0.93

Upper half = 0.93 0.95 1.16 1.17 1.18 1.42

The lower quartile is the median of the lower half of the data set.

Lower half = 0.54 0.57 0.69 0.75 0.85 0.93

The median is 6/2 = 3rd position

Therefore, the lower quartile of the data set is 0.69 W/kg

3. Upper quartile:

Divide the data set into two equal halfs (include median in both if n = odd)

Lower half = 0.54 0.57 0.69 0.75 0.85 0.93

Upper half = 0.93 0.95 1.16 1.17 1.18 1.42

The upper quartile is the median of the lower half of the data set.

Upper half = 0.93 0.95 1.16 1.17 1.18 1.42

The median is 6/2 = 3rd position

Therefore, the upper quartile of the data set is 1.16 W/kg

4. Minimum value:

The minimum value is the least value in the data set.

0.54 0.57 0.69 0.75 0.85 0.93 0.95 1.16 1.17 1.18 1.42

Therefore, the minimum value of the data set is 0.54 W/kg

5. Maximum value  

The maximum value is the least value in the data set.

0.54 0.57 0.69 0.75 0.85 0.93 0.95 1.16 1.17 1.18 1.42

Therefore, the maximum value of the data set is 1.42 W/kg

The box plot is illustrated in the attached diagram.

Answer:

Kg

Explanation:

Given that the definition of intensity is:

The intensity of the beam is defined as the energy delivered per unit area per unit time. That is,

I =( E × t)/A

Which can expressed as

I = J/m^2/s

The S.I Units of

Energy is Joule = kgm^2s^-1

Area A = m^2

Time t = s

Intensity I = kgm^2s^-1 × m^-2 × s

Intensity I = kg

The cubic metres and seconds are cancelled out

Therefore, the S.I units of intensity is kg

Answer: false

Explanation:

While kilograms are the unit used to measure body mass, the device used is a scale.

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Among the given trajectories, the particles moving along the trajectory with the least curvature will have the slowest speed.

When charged particles enter a uniform magnetic field, they experience a centripetal force which causes them to move in a circular path. The radius of this circular path depends on the speed of the particles, their mass, and their charge. The equation for the radius is:
r = (mv) / (qB)
where r is the radius, m is the mass, v is the speed, q is the charge, and B is the magnetic field strength.
For identical particles with the same charge and mass, a larger radius of curvature indicates a higher speed, while a smaller radius indicates a slower speed. To determine which trajectory has the slowest speed, we should look for the trajectory with the least curvature, meaning the largest radius.
The particles moving along the trajectory with the least curvature (largest radius) will have the slowest speed in a uniform magnetic field pointing out of the page.

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Answer:

The computers used in education and entertainment are:

Explanation:

Analog computer,Digital COMPUTER,Hybrid Computer

The evidence supporting the predicted existence of gravitational waves includes observations of their effects on large masses suspended on Earth, such as the Laser Interferometer Gravitational-Wave Observatory (LIGO).

Additionally, energy generated by gravitational waves from the Sun can be seen as it is absorbed by Jupiter, and the orbit of a star system consisting of two neutron stars is slowly decaying, suggesting that energy is being carried away by gravitational waves. Gravitational waves are not frequently or easily detected by large telescopes but can be seen in photographs of spacetime as ripples that are clearly visible.
The evidence supporting the predicted existence of gravitational waves primarily comes from the observation of a binary neutron star system's orbit decaying over time. This decay suggests that energy is being carried away by gravitational waves, as predicted by Albert Einstein's general theory of relativity. Gravitational waves are ripples in spacetime caused by the acceleration of massive objects, such as neutron stars or black holes. In 2015, the LIGO (Laser Interferometer Gravitational-Wave Observatory) collaboration directly detected gravitational waves for the first time, providing further evidence of their existence.

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Answer:

C

Explanation:

The answer depends on the force-distance relationship for stretching the bands and the displacement of the stone from the equilibrium position.

The force required to stretch one rubber band by 1.0 cm is 15 N. Therefore, the force required to stretch it by 0.20 m is (15 N/0.01 m) * 0.20 m = 300 N.

The potential energy stored in each rubber band is given by the formula PE = (1/2) * k * \(x^2\), where k is the spring constant and x is the displacement. Since we have two rubber bands, the total potential energy stored in the two bands together is PE = 2 * (1/2) * k * \(x^2\).

Substituting the values, where k = 300 N/m and x = 0.20 m, we can calculate the potential energy:

PE = 2 * (1/2) * (300 N/m) * \((0.20 m)^2\) = 12 J.

Therefore, the potential energy stored in the two bands together when the stone is pulled back 0.20 m is 12 J.

(b) To determine the speed at which the stone leaves the slingshot, we can use the principle of conservation of mechanical energy. At the point of release, all the potential energy stored in the bands is converted into kinetic energy of the stone.

The potential energy stored in the bands is given by PE = (1/2) * m * \(v^2,\) where m is the mass of the stone and v is its velocity.

Equating the potential energy to the initial potential energy (12 J) and solving for v, we have:

(1/2) * m * \(v^2\) = 12 J.

Substituting the values, where m = 50 g = 0.05 kg, we can solve for v:

(1/2) * (0.05 kg) * \(v^2\) = 12 J.

\(v^2\) = (12 J) / (0.025 kg) = 480 \(m^2/s^2.\)

Taking the square root of both sides, we find v ≈ 21.9 m/s.

Therefore, the stone leaves the slingshot with a speed of approximately 21.9 m/s.

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Answer:

\(0.361\ \text{m}\)

Explanation:

\(f_s\) = Frequency of source = 375 Hz

\(\Delta f\) = Difference between the maximum and minimum sound frequencies = 2.75 Hz

v = Speed of sound in air = 343 m/s

T = Time period = 1.8 s

\(v_m\) = Maximum speed of the microphone

We have the relation

\(\Delta f=2f_s\dfrac{v_m}{v}\\\Rightarrow v_m=\dfrac{\Delta fv}{2f_s}\\\Rightarrow v_m=\dfrac{2.75\times 343}{2\times 375}\\\Rightarrow v_m=1.26\ \text{m/s}\)

Amplitude is given by

\(A=\dfrac{v_mT}{2\pi}\\\Rightarrow A=\dfrac{1.26\times 1.8}{2\pi}\\\Rightarrow A=0.361\ \text{m}\)

The amplitude of the simple harmonic motion is \(0.361\ \text{m}\).

Answer:

a.25J

Explanation:

m=0.5kg

g=10

h=5

potential energy=m×g×h

=0.5×10×5

=25J

Answer:

the result of raising the temperature of the room in which a low-pressure chiller is located is a

Faster Refrigerant Recovery

On increasing the temperature, the pressure of chiller will increase, causing the blow of hot air in the condenser, which is quite harmful for mechanism of machine.

The given problem is based on the effect of raising temperature on low-pressure chiller.

Thus, we can conclude that on increasing the temperature, the pressure of chiller will increase, causing the blow of hot air in the condenser, which is quite harmful for mechanism of machine.

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Explanation:

Domestic wiring is house wiring were phase/live wire,neutral wire,earth wire is used that functions in giving the electricity to our home except in case of neutral wire

-Sounds of Vehicles

-Speakers or TV's at High Volume

-Kitchen Appliances

-Electronic Appliances

-Barking of dogs

Answer:

there are many

Explanation:

includeing planes

loud music

cars

traffic noise

Explanation:

hope this helps you

..........

Answer: B. A model of a cell is easier to manipulate

Explanation: just took the test//APEX

We can use the equations of projectile motion to determine the unknowns and answer the following questions:

The time it takes for the ball to reach its maximum height can be found using the following equation:

Vy = Voy - gt

where Voy is the initial vertical velocity and g is the acceleration due to gravity. At the maximum height, the vertical velocity of the ball is zero, so we have:

0 = Voy - gt

t = Voy/g

t = (34.0 m/s)sin(73°)/9.81 m/s^2 ≈ 3.6 s

         y = Voyt - 1/2 gt^2

where y is the vertical displacement of the ball. At the maximum height, the vertical displacement is equal to the initial height of the ball, so we have:

66.0 m = (34.0 m/s)sin(73°)t - 1/2 (9.81 m/s^2)t^2

t ≈ 3.6 s

y = (34.0 m/s)sin(73°)(3.6 s) - 1/2 (9.81 m/s^2)(3.6 s)^2 ≈ 117 m

         t_total = 2t

where t is the time it takes for the ball to reach its maximum height. Substituting the value of t from above, we get:

t_total = 2(3.6 s) ≈ 7.2 s

        x = Vx t

where Vx is the initial horizontal velocity of the ball. Substituting the given values, we get:

x = (34.0 m/s)cos(73°)(7.2 s) ≈ 241 m

        Vf = sqrt(Vx^2 + Vy^2 - 2gy)

where Vx and Vy are the horizontal and vertical components of the velocity, respectively, and y is the vertical displacement of the ball. At the instant of impact, the vertical displacement is equal to the initial height of the ball, so we have:

y = 66.0 m

Substituting the given values, we get:

Vf = sqrt[(8.9 m/s)^2 + (32.7 m/s)^2 - 2(9.81 m/s^2)(66.0 m)] ≈ 29.1 m/s

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Answer:

The correct answers are 2, 4

Explanation:

The dispersion of light occurs due to the interaction of electromagnetic radiation with matter, let's analyze the phenomenon, when a ray of light reaches a particle is absorbed and subsequently re-emitted in all directions, for radiation of lower wavelength (higher frequency ) the highest absorptions and therefore the missionary also the highest; An example of this is the blue light from the atmosphere, which is the absorption of blue light and its subsequent re-emission

Based on this explanation, the dispersion in gas particles or molecules is proportional to the frequency of the light (inversely proportional to the wavelength) and is also proportional to the number of dispersing particles in the air, that is, to the total volume of the particles. dispersers.

The correct answers are 2 and 4

Answer:

\(V_{2.2} =2.2V\)

Fast and loose: that's a classic voltage divider. the drop from the i-th resistor is \(R_i \over {\sum R}\) of the drop across the whole series. In our situation, it's \(2.2\cdot 10^3 \over {2.2\cdot10^3 + 6.8\cdot 10^3\) of 9 V. By plugging numbers in a calculator, it's 22/90 of 9V, or 2.2V

With Ohm's Law

The series is equivalent of a single resistor of Resistance \(2.2\cdot 10^3+6.8\cdot 10^3 \Omega = 9.0 k\Omega\). By Ohm's first Law (\(V=Ri\)) the current flowing through the resistor is \(9V = 9*10^3\Omega i \rightarrow i=1mA\). At this point, the drop across the first resistor is, again by Ohm's law\(V = 2.2 \cdot 10^3 \Omega \cdot 1\cdot 10^{-3} A = 2.2V\)

La actividad física posee muchos beneficios para la salud. Algunos de estos beneficios son la reducción en el riesgo de padecer enfermedades, control del peso, fortalecimiento de huesos y músculos, etc.

La actividad física regular previene la aparición de enfermedades cardiovasculares al evitar la acumulación de colesterol en las arterias que transportan sangre a diferentes áreas del organismo.

La actividad física consume calorías, especialmente aquellas provenientes de los lípidos (grasas), con lo cual permite controlar el peso y reducir el riesgo de obesidad.

La actividad física también ayuda al fortalecimiento de los tejido oseo, con lo cual previniendo enfermedades relacionadas tales como la osteoporosis.

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The femur of the runner compresses by 0.0006 m when the normal force of the ground on the foot reaches three times the runner's body weight.

Given:

Length of the femur, L = 52 cm = 0.52 m

Mass of the runner, m = 79 kg

Cross-sectional area of the bone of the femur, A = 5.2 x 10⁻⁴m²

Young's modulus of the bone of the femur, Y = 1.6 x 10¹⁰ N/m²

The force exerted on the foot when it strikes the pavement, F = 3mg

The stress on the bone can be calculated as:

Stress = Force / Area

Stress = 3mg / A

The strain on the bone can be calculated as:

Strain = Stress / Young's modulus

Strain = (3mg / A) / Y

The change in length of the femur, ΔL, can be calculated as:

ΔL = Strain x Length

ΔL = [(3mg / A) / Y] x L

Substituting the given values, we get:

ΔL = [(3 x 79 x 9.81) / (5.2 x 10⁻⁴ x 1.6 x 10¹⁰)] x 0.52

ΔL ≈ 0.0006 m

Therefore, the femur of the runner compresses by 0.0006 m when the normal force of the ground on the foot reaches three times the runner's body weight.

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Answer:

momentum

Explanation:

the impulse is equal for both carts, the momentum for both carts is zero both before the string is cut and after it is cut

After the string is cut and the carts move apart, the magnitude of momentum is the same for both carts. Hence, option B is correct.

Momentum is the result of a molecule's mass and velocity. Being a vector quantity, momentum possesses both magnitude and the direction. As according to Isaac Newton's second equation of motion, the force applied on a particle is equivalent to the time change in velocity. 

According to Newton's 2nd law, if a particle is exposed to a constant force for a specific period of time, the result of the force and time (referred to as the impulse) is equal to the difference in momentum. In contrast, hand, a particle's momentum is a measurement of the amount of time needed for a consistent force to put it to rest.

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If the fish in the aquarium are accelerating upwards with an acceleration a, then the buoyant force acting on the fish will decrease. The buoyant force is given by:

B = ρVg

where ρ is the density of water, V is the volume of the fish, and g is the acceleration due to gravity.

If the fish are accelerating upwards with an acceleration a, then the buoyant force will be reduced by an amount equal to the product of the mass of the fish and the acceleration:

B' = ρVg - ma

where m is the mass of the fish.

The weight of the fish is given by:

W = mg

where g is the acceleration due to gravity.

The net force acting on the fish is given by:

F_net = W - B'

Substituting the expressions for W and B', we get:

F_net = mg - (ρVg - ma)

Simplifying, we get:

F_net = (m - ρV)a

Since the fish are accelerating upwards, the weighing machine will register a lower weight for the aquarium and its contents. The weight measured by the weighing machine is given by:

W_measured = (m - ρV)g

If the acceleration of the fish is a, then the net force acting on the aquarium and its contents is given by:

F_net = (m - ρV + ρV_fish) a

where V_fish is the total volume of the fish in the aquarium.

The weight measured by the weighing machine will be reduced by an amount equal to the product of the mass of the fish and the acceleration:

W_measured' = W_measured - m_fish a

where m_fish is the total mass of the fish in the aquarium.

Therefore, the correct option is:

The weight measured by the weighing machine will decrease by an amount equal to the product of the mass of the fish and the acceleration of the fish.

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The plane travels a distance of 325 miles if the airplane travels for 2.5 hours at an average speed of 130 miles per hour. Using the distance formula (d = rt), we can calculate the distance.

To find the distance traveled by the airplane, we can use the distance formula, which is represented as d = rt. In this formula, "d" represents the distance, "r" represents the rate or speed at which the object is traveling, and "t" represents the time taken for the travel.

Given that the airplane travels for 2.5 hours at an average rate of 130 miles per hour, we can substitute these values into the formula. The rate of the airplane is 130 miles per hour, and the time taken is 2.5 hours.

Using the formula, we can calculate the distance traveled as follows:

d = rt

d = 130 mph × 2.5 hours

Multiplying the rate (130 mph) by the time (2.5 hours) gives us:

d = 325 miles

Therefore, the airplane travels a distance of 325 miles during the 2.5 hours of travel at an average rate of 130 miles per hour.

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Answer: 28.0134 g/mol

Explanation:

For a molecule (for example, nitrogen, N2) the mass of molecule is the sum of the atomic masses of the two nitrogen atoms. For nitrogen, the mass of the N2 molecule is simply (14.01 + 14.01) = 28.02 amu.

When a ball is tossed straight upward in an airplane doing 500 mi/h in a straight line at constant altitude, its position relative to the person who tossed it will be below or behind that person when it lands in the cabin.

The ball is tossed upward in the airplane. It moves upward and then falls down again, landing on the cabin floor. When the ball is tossed upward, it will have the same horizontal velocity as the airplane and so will move forward with the airplane at the same speed, 500 mi/h.

As the ball rises, it slows down due to the acceleration due to gravity acting in the opposite direction of the motion. At the highest point, the ball will be motionless, i.e. its vertical velocity will be zero.

Then it falls down again, accelerating downward due to gravity while still moving forward with the airplane at 500 mi/h.When the ball lands in the cabin, its position relative to the person who tossed it will be behind that person, as the airplane has moved forward during the time the ball was in the air.

The altitude of the airplane is constant, so the ball does not change altitude relative to the airplane, but the airplane moves forward due to its constant horizontal velocity of 500 mi/h. Therefore, the ball lands behind the person who tossed it.

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Answer:

B

Explanation:

the external force was applied