New velocity of the boat
A small boat is moving at a velocity of 3.35m/s when it is accelerated by a river current perpendicular to the initial direction of mmotion. If the current acceleration is 0.750m/s^2, what will the new velocity of the boat be after 33.5s?
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The mass of a carbon atom is 2.0x10^-26. What is the kinetic energy of a carbon atom moving with a speed of 500 m/s?
Glass photographic plates were once the standard detector for astronomical imaging. Describe the type of detector that has replaced photographic plates and outline what its advantages are.
A child bounces a 45 g superball on the side-walk. The velocity change of the superball is from 23 m/s downward to 14 m/s upward. If the contact time with the sidewalk is 1/800s, what is the magnitude of the average force exerted on the superball
A fan at a rock concert is 30 m from the stage, where the sound intensity level is 110 dB. Her eardrums have a diameter of 8.4 mm. How much energy is transferred to each eardrum in one second?
Disregarding friction, how much faster would the ball travel if the cannon were mounted rigidly and all other parameters remained the same?
How close to the side walk can the flower pot fall before it is too late for a warning shouted from the balcony to reach the man in time? Assume that the man below requires 0.353 s to respond to the warning, and the velocity of sound in air to be
Use the Lagrangian approach to find the angular frequency of small oscillations about the top position. Note the moment of inertia of the cube I = 2mb2/3 and for the small angle approximation: sin θ ≈ θ and cos θ ≈ 1
How fast (in rpm) must a centrifuge rotate if a particle 8.06 cm from the axis of rotation is to experience an acceleration of 79000 g?
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