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One runner covered the 100-m dash in 10.9 s. Another runner came in second at a time of 11.4 s. Assuming that the runners traveled at their average speeds for the entire distance, determine the separation between the two runners when the winner crossed the finish line.
An airplane is flying with a velocity of 85.0 m/s at an angle of 25.0 degrees above the horizontal. When the plane is a distance 117 m straight above a dog that is standing on level ground, a suitcase drops out of luggage compartment. How far from..
When resting, a person has a metabolic rate of about 5.84 x 105 joules per hour. The person is submerged neck-deep into a tub containing 3.61 x 103 kg of water at 28.8 °C. If the heat from the person goes only into the water, find the water temper..
In the Bohr model of the hydrogen atom, an electron in the 3rd excited state moves at a speed of 2.43 105 m/s, What is the effective current associated with this orbiting electron
The end point of a spring vibrates with a period of 1.9 seconds when a mass m is attached to it. When this mass is increased by 9.630×101 kg, the period is found to be 4.1 seconds. Find the value of m.
Using the kinematic equation, prove that if two balls are released simultaneously from table, one with zero velocity and the other with a horizontal velocity, they would both reach the ground at the identical time.
A diver of weight 780 N stands at the end of a diving board of length L = 5 m and negligible mass. The board is fixed to two pedestals separated by distance d = 1.5 m
A person walks up a stalled 14 m long escalator in 81 s. When standing on the same escalator, now moving, the person is up in 48 s. How much time would it take that person to walk up the moving escalator?
You pull with a force of 295 N on a rope that is attached to the block of mass 20 kg, and the block slides across the floor at a constant speed of 1.2 m/s. The rope makes an angle of 35 degrees with the horizontal.
How long does it take for amplitude to drop to half its initial value . How long does it take for mechanical energy to drop to half its initial value.
The total mechanical energy of the spacecraft, assume that the gravitational potential energy is zero at an infinite distance from the Earth.
When its 75kW engine is generating full power, a small single engine airplane with a mass of 700 kg gains altitude at a rate of 2.5 m/s. what fraction of the engine power is being used to make the air plane climb.
Three point charges are arranged along the x axis. Charge q1= -4.70 nC is located at x= 0.200 m and charge q2 = 2.20 nC is at x = -0.340 m. A positive point charge q3 is located at the origin.
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