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A 70-kg sky diver jumped out of an airplane at an altitude of 0.80 km. She opened her parachute after a while and eventually landed on the ground with a speed of 5.2 m/s. How much energy was dissipated with air resistance through the jump?
A cartoon coyote sets out to capture the elusive road-runner by wearing a pair of ACME jet-powered roller skates, which provide a constant horizontal acceleration of 10 m/s^2. The coyote starts off at rest 100 m from the edge of a cliff at the ins..
q1. a car travelling east at 38.0 ms passes a trooper hiding at the roadside. the driver uniformly reduces his speed to
a piston with a radius of 10 cm and a mass of 50 kg presses down on water inside a cylinder. the atmospheric pressure
two point charges are separated by 10.0 cm and have charges of 2.00 muc and -2.00 muc respectively. calculate the
A 19.5 ?F capacitor is fully charged by connecting it to a 14.0 V battery. Calculate the charge stored on one of the capacitor plates
an electron initially traveling at a speed of 105 ms enters a region where there is a uniform magnetic field of 2 t
Your spaceship lands on a planet that has a gravitational force whose magnitude is 1/5th of Earth's gravitational force. If you weigh 800 N on Earth
The primary coil of a step-uptransformer is connected across the terminals of a standard wallsocket, and resistor 1 with a resistance R1 is connected across the secondary coil. The current in the resistor is the nmeasured.
A helicopter is lifting two crates simultaneously. One crate with a mass of 160 kg is attached to the helicopter by cable A. The second crate with a mass of 73 kg is hanging below the first crate and attached to the first crate by cable B. As the hel..
A firefighter standing on a ladder 4.20 meters in the air is using a water hose to put out a fire. How much work is done per minute in lifting the water from the ground
Explain the di?erences between the electron energy spectrum of β- decay and that from an internal conversion process. What are the di?erences of these two decay mechanisms?
A projectile is launched at 45.0 degrees with the horizontal. Its initial speed is 250. m/s. what is the speed and direction of the object when it lands
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