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In Rutherford's famous scattering experiments that led to the planetary model of the atom, alpha particles (having charges of +2e and masses of 6.64 10^-27 kg) were fired toward a gold nucleus with charge +79e. An alpha particle, initially very far from the gold nucleus, is fired at 1.8 10^7 m/s directly toward the nucleus, as in the figure below. How close does the alpha particle get to the gold nucleus before turning around? Assume the gold nucleus remains stationary.
A 2.0kg solid cylinder (radius = 0.10m , length = 0.70m ) is released from rest at the top of a ramp and allowed to roll without slipping. When the cylinder reaches the bottom of the ramp, what is its total kinetic energy
a boat with a horizontal tow rope pulls a water skier. She skis off to side, so the rope makes an angle of 15.0 degrees with her direction of motion, How much work is done on the skier by the rope
When at rest, two trains have sirens that emit a frequency of 300 Hz. The trains travel toward one another and toward an observer stationed between them. What is the speed of the second train
You are driving a long, thinking about a difficult physics problem, and you fail to notice the warning lights at the entrance to a drawbridge. how fast were you going when you struck the bridge
A starship blasts past the earth at 2.0\times 10^8\;{\rm{ {\rm m}/{\rm s}}}. With what speed does the laser beam approach the earth
Radius of rotation of the hanging mass in apparatus in lab M20a is set to 10.0 cm. Determine the centripetal force and suspended mass
A drag racer crosses the finish line doing 216 mi/h and promptly deploys her drag chute, What force must the drag chute exert on the 850 kg car to slow it to 45.2 mi/h in a distance of 161 m
What is the frequency of a spring with spring constant 420 N/m that has attached a mass of 3.5 kg and initially displaced 0.25 meters. what is the maximum kinetic energy this mass obtains
A satellite has a mass of 95 kg and is located at 1.99 106 m above the surface of Earth. What is the magnitude of the gravitational force on the satellite
a person fasts for 40 days. during this time they lose 17 kg of body mass - 13 kg of fat and 4 kg of protein and
Rhea, one of Saturn's moons, has a radius of 765 km, Calculate its mass and average density
Saturn has an equatorial radius of 6.00 107 m and a mass of 5.67 1026 kg. Compute the acceleration of gravity at the equator of Saturn. What is the ratio of a person's weight on Saturn to that on Earth?
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