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A ball thrown horizontally at 20 m/s travels a horizontal distance of 52 meter before hitting the ground. Determine from what height was the ball thrown?
m
A stone with a mass of 0.700 {\rm kg} is attached to one end of astring 0.700 {\rm m} long. The string will breakif its tension exceeds 65.0 {\rm N}. The stone is whirled in ahorizontal circle on a frictionless tabletop;
A capacitor is discharged when a wire is connected across its terminals, How much energy is released for a 1.00 uF capacitor with 10.0 V across its plates
A certain kind of glass has an index of refraction of 1.650 for blue light of wavelength 440 nm and an index of 1.620 for red light of wavelength 690 nm. If abeam containing these two colors is incident at an angle of 30.0° on a piece of this glass, ..
a freezer with a coefficient of performance of 3.88 is used to convert 1.75 kg of water to ice in one hour. how much electrical energy does the freezer use during this hour of operation
A hydrogen atom in its ground state absorbs a photon with an energy of 26 eV, What is the kinetic energy of the ejected electron
A sphere 28 cm in diameter contains an ideal gas at 1.4 at m and 9?C. As the sphere is heated to 150 ? C, gas is allowed to escape. The valve is closed and the sphere is placed in an ice-water bath. What is the pressure in the sphere when it is in th..
Two balls with a net charge of - 4.0 ?C and + 10.0 ?C are separated by 2 cm. What is the electrostatic force on the positive charge
The density of charge-carrying electrons in copper is 8.5 × 1028 electrons m?3, its resistivity is 1.72 × 10-8 ?·m, and the drift speed is 2.80 × 10-3 m/s. At what rate must thermal energy be carried off by a cooling medium
A wagon is rolling forward on level ground. Friction is negligible. The person sitting in the wagon is holding a rock. Determine the speed of the wagon after the rock is thrown
A 8.7 kg freight car is coasting at a speed of 38.8 m/s along a straight track when it strikes a 13.5 kg stationary freight car and couples to it. What will be their combined speed after impact
A heat engine working between 170.0oC and 400.0oC, takes in 1.639×107 J of heat and delivers 4.200×106 J of work per cycle. What is the maximum possible efficiency of an engine working between these two temperatures
The space shuttle releases a satellite into a circular orbit 600 kilometer above the Earth. Find how fast must the shuttle be moving
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