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Early skeptics of the idea of a rotating Earth said that thefast spin of Earth would throw people at the equator intospace. The radius of Earth is about 6.38 * 10^3 km. Show why this objection is wrong by calculating...
a. the speed of a 97-kg person at the equator
b. the force needed to accelerate the person in thecircle
c. the weight of the person
d. the normal force of Earth on the person, that is, theperson's apparent weight.
a 0.300 kg croquet ball makes an elastic head-on collision with a second ball initially at rest. the second ball moves
The golden gate bridge in San Francisco has a main span of length 1.28km, one of the longest in the world. How does this compare to the elastic limit of steel
At a certain instant a particle (mass=0.5 kg) is moving in the +x direction with velocity 14 m/s. What is the magnitude of the momentum of the particle (in kg*m/s) at the end of this 0.15 second interval
Two identical point charges are fixed distance from one another. If one of their charges was doubled an the other was halved, how would the electric force be affected.
An ac generator producing 10 V (rms) at 300 rad/s is connected in series with a 25-? resistor, The rms current in the circuit (in mA) is
A piece of metal weighs 53.6 N in air, 35.0 N in water, and 42.2 N in an unknown metal. What is the density of the unknown liquid
Parallel-Plate capacitor has plate area 0.4m^2 and a separation of 0.1mm. How much energy is stored in its field
how far from a 53.4 mm focal-length lens must an object be placed if its image is to be magnified 2.20 and be real?
an aluminum nucleus has 13 protons and 14 neutrons. a copper nucleus has 29 protons and 34 neutrons. what is the force
a bullet of mass m1 is fired horizontally with a speed v into the bob of a ballistic pendulum of mass m2 find the maximum hight h attained by the bob
A 0.534-nm photon collides with a stationary electron. After the collision, the electron moves forward and the photon recoils backwards. Find the momentum of the electron
What is the change in Marys potential energy. Find the final speed of the particle.
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