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Early skeptics of the idea of a rotating Earth said that the fast spin of Earth would throw people at the equator into space. The radius of Earth is about 6.38 x 103 km. Show why this objection is wrong by calculating
1. The weight of the person.
2. The speed of a 97-kg person at the equator.
3. The force needed to accelerate the person in the circle.
4. The normal force of Earth on the person, that is, the person’s apparent weight.
a radiochemist wants to carry a small vial containing 1109 bq of cobalt-60 solution from one laboratory fume hood to
A pendulum consists of a mass m = 0.120 kg hangingfrom a flexible string of length L. Find the oscillation frequency of the pendulum
A projectile is fired straight upward at 141 m/a. how fast is it moving at the instant it reaches the top of its trajectory? Assume in its place that it was fired upward at 45. What would be its speed at the top of its trajectory.
A cat walks along a plank (length = 4.00 m and mass = 7.00 kg). What is the mass of the cat
the speed of sound does not depend on the loudness or the frequency of sound. the speed of sound in dry air 0 degree
a vertical containery with base area measuring 14.0 cm by 17.0 cm is being filled with identical pieces of candy each
Suppose that a block of mass m = 9.0 kg moving with speed V is behind a block of mass M = 27 kg and speed of 0.5 m/s, How much kinetic energy of the blocks is lost due to the collision
Jane plans to fly from Binghampton, New York, to Springfield, Massachusetts, about 280 km due east of Binghampton, What was the wind velocity
Long, long ago, on a planet far, far away, a physics experiment was carried out. First, a 0.250- ball with zero net charge was dropped from rest at a height of 1.70. The ball landed 0.400 later. Next, the ball was given a net charge of 7.85 and dropp..
A 45.0 kg person, standing 1.3 m from the axis, begins to run on the disk in a circular path and has a tangential speed of 2.80 m/s relative to the ground. Find out the resulting angular speed of the disk (in rad/s)
Suppose you carry a bag of groceries weighing 100 N from your car to your kitchen, a distance of 61 m, without raising or lowering the bag. What is the work done by the force you exert on the bag
Use the following values for mass and charge: an electron has mass me = 9.11x10-31 kg and charge -e, a proton has mass mp = 1.67x10-27 kg, What is the kinetic energy of the electron
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