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An astronaut on the surface of the moon weighs rock samples using a light spring balance. The balance, which was calibrated on earth, has a scale 100mm long which reads from 0 to 1.0kg. He observes that a certain rock gives a steady reading of 0.40kg and, when disturbed, vibrates with a period of 1.0s. What is the acceleration due to gravity on the moon?
A car rounds a flat circular track with radius 210 m. The coefficient of static friction between the tires and track is 0.65. What's the maximum speed for the car
A plastic rod that has been charged to 19touches a metal sphere. Afterward, the rod's charge is 3.0. How many charged particles were transferred
What is the angle of incidence in air of a light ray whose angle of refraction in glass is half the angle of incidence? Assume the refractive index of glass is 1.50
Two balls with mass m1 and m2 are a distance R apart. The gravitational force between them is F. find the gravitational force between these balls
During a lunar landing mission, the command module continuesto orbit the Moon at an altitude of about 95 km. How long does it take to go around the Moon once
Mercury has a mass MP = 3.18 x 1023 kg, an orbital period T = 88.0 days, and an orbital radius r = 5.79 x 1010 m. Assume the orbit of Mercury around the Sun is approximately circular.
A potter's wheel is rotating around a vertical axis through its center at a frequency of 1.8. What is the frequency of the wheel after the clay sticks to it
As part of the safety investigation, two 1400 {rm kg} cars travelling at 23 {rm m/s} are crashed into different barriers. Find the average forces exerted on (a) car that hits a line of water barrels and takes 1.7 {rm s} to stop, and (b) car that hits..
Particle A and particle B are held together with a compressed spring between them. When they are released, the spring pushes them apart, and they then fly off in opposite directions, what are the kinetic energies of each particle
a 1 kg projectile is shot straight up from the earths surface with a velocity of 100 ms and reaches a height of 300 m
One runner ran the 100-m dash in 11.9 s. Another runner came in secona at 12.4 s. Assuming that the runners traveled at their average speeds for the entire distance, determine the sepaaration between the two runners when the winner crossed the fin..
A ceiling fan is turned on and a net torque of 1.6 N·m applied to the blades. What is the angular acceleration of the blades
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