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A toy rocket engine lifts a mass of 4.5 kg to a height of 15.0 meters. At this height, the rocket is moving at 26.7 m/s. How much work was done by the rocket engine?
A satellite is in a circular orbit around the Earth at an altitude of 3.38 106 m. Find the acceleration of the satellite
A 10000 kg train car A traveling at a speed of 24 m/s strikes an identical car B initially at rest. calculate the amount of the initial kinetic energy is transformed into thermal or other forms of energy
A metal sphere hangs from a string and has 4 kg of mass. The sphere has a charge of +2.3 µC. What is the electric force on the metal sphere if the magnitude of the electric field is 106 N/C
A 65 kg hiker has fallen down a hole. One rescuer attaches a rope to the injured hiker and then a second rescuer pulls the injured hiker straight up out of the hole at a steady rate. How much force would the second rescuer need to exert on the rope t..
A ball starts at a point 30 m above the bottom of a dip with of 25 m/s. overlook friction, what will be the speed of the ball at the top of the next slope, which is 45 m above the bottom of the dip.
A kettle containing 9kg of water reached its boiling point. How much energy, in joules, is required to boil the kettle dry
The range of human hearing is roughly from twenty hertz to twenty kilohertz. what are the lengths of the longest and shortest pipes
A machine carries a 5.0 kg package from an initial position of di = (0.50 m) i + (0.75 m) j + (0.20 m) k at t = 0 to a final position of df = (7.80 m) i + (13.0 m) j + (7.30 m) k at t = 15 s. find the power of the machine's force on the package
The secondary coil of a step-up transformer provides the voltage that operates an electrostatic air filter. Find the power consumed by the air filter
The vector shows the weight of the stone. Complete the vector diagram showing another vector that results in zero net force on the stone. Illustrate what is the conventional name of the vector you have drawn?
Calculate the power spectrum of square pulse with amplitude, A and length, τ0 . plot the power spectrum, showing several zero-crossings. Showing the bandwidth in frequency is inversely proportional to τ0.
Birds resting on high-voltage power lines are a common sight. The copper wire on which a bird stands is 2.2 cm in diameter, calculate the potential difference between its feet
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