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The shock absorbers in the suspension of a car are in such bad shape that they have no effect on the behaviour of the springs attached to the axles. Each of the identical springs attached to the front axles supports 351 kg. A person pushes down on the middle of the front end of the car and notices it vibrates during 10 cycles in 3.1 seconds. Discover the spring constant of either spring.
Two weights are connected by a very light flexible cord that passes over a 30 frictionless pulley of radius 0.100. The pulley is a solid uniform disk and is supported by a hook connected to the ceiling. One weight is 75N and the other is 125 N.
a parallel plate capacitor with plate separation d is connected to a battery. the capacitor is fully charged to q
Some birthmarks can be removed by exposure to 585 nm laser light. Pulses are strongly absorbed by hemoglobin in the capillaries in the birthmark, What is the power of the laser pulse
During 5 successive 0.93 min intervals, a runner moves at the following constant speeds: 0.424 km/min, 0.224 km/min, 0.160 km/min, 0.160 km/min
What is the propotion of the mass of these excess electrons to the mass of the penny.
king arthurs knights fire a cannon from the top of the castle wall. the cannonball is fired at a speed of 54 ms and an
An alien spacecraft is flying overhead at a great distance as you stand in your backyard. You see its searchlight blink on for 0.190. The first officer on the spacecraft measures that the searchlight is on for 12.0.
a 43.3 kg boy and a 60.0 kg girl are on the surface of a frozen lake 10.5 m apart. using a rope the boy exerts a
A freezer has a coefficient of performance of 2.52 . The freezer is to convert 1.90 kg of water at 26.0 Celsius 1.90 kg of ice at -5.00 Celsius in 1 hour. How much wasted heat is rejected to the room in which the freezer sits
A rural mail carrier leaves the post office and drives 22 km in a northerly direction. She then drives in a direction 60.0 Deg south of east for 47 km
A small glass bead has been charged to +19 nC. A metal ball bearing 1.0 cm above the bead feels a 0.025 N downward electric force
a string is wound tightly around a fixed pulley whose radius is 5.0 cm. as the string is pulled the pulley rotates
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