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A shell is fired with a horizontal velocity in the positive x direction from the top of an 80 m high cliff. The shell strikes ground 1330 m from the base of the cliff. What is the time of the shell as it hits the ground? What is the final VERTICAL velocity?
A gymnast with mass m1 = 42 kg is on a balance beam that sits on (but is not attached to) two supports. The beam has a mass m2 = 106 kg and length L = 5 m. Each support is 1/3 of the way from each end. at first the gymnast stands at the left end of..
A 72.0-kg log falls from a height of 20.0 m into a lake. find the change in entropy of the air during this process
A light, flexible cable is wrapped around a solid cylinder with mass 3.5 kg and radius 0.8 meters.
In 1960 a Tampa, Florida, mother reportedly raised one end of a car that had fallen onto her son when a jack failed. how much work did her force do on the car
In an experiment, a 1.5 kg lab cart moving to the right at 0.080 m/s collides with a 0.5kg lab cart moving to the right at 1.3 m/s. How fast is the 0.5 kg lab cart moving after the collision
A clock has a second hand whose tip rubs against the inside of the glass cover. what is the minimum torque that must be applied to the second hand
A 5000 ohms resistor and a 50uF capacitor are connected in series at t=0 with a 6V battery. The capacitor is initially uncharged. What is the maximum charge stored on the capacitor
One rechargeable battery of mass 15.0 g delivers an average current of 18.0 mA to a compact disc player at 1.60 V for 2.40 h before the battery needs to be recharged. The recharger maintains a potential difference of 2.22 V across the battery and ..
If a human ear canal can be thought of as resembling an organ pipe, closed at one end, that resonates at a fundamental frequency of 2,975 Hz, what is the length of the canal? Use normal body temperature 37°C for your determination of the speed of sou..
A father racing his son has 1/2 the kinetic energy of the son, who has 1/3 the mass of the father. What are the original speeds of the son and father
A charged conducting sphere has a radius of 10.0 cm and is surrounded by an electric field. What is the potential at the center of sphere
When a potential difference of 166 V is applied to the plates of an air-filled parallel-plate capacitor, What is the spacing between the plates
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