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How much work does an elevator motor do to lift a 1000 kg elevator a height of 100 m?
How much power should the motor supply to do this in 50 s at constant speed?
Physics - Classical Mechanics : explained, A student could either pull or push, at an angle of 300 from the horizontal, a 50-kg crate on a horizontal surface, where the coefficient of kinetic friction between the crate and surface is 0.20. The cra..
A heat engine has an efficiency of 61.5% and it exhausts 7500 J of waste heat into the environment. How much work is performed by the previous heat engine
At the moment of release, a baseball player has a horizontal velocity component of 39 meters per second, At what angle was the ball released
When you take a bath, how many kilograms of hot water (48.8°C) must you mix with cold water (13.6°C) so that the temperature of the bath is 36.5°C? The total mass of water (hot plus cold) is 193 kg. Ignore any heat flow between the water and its exte..
An uncharged capacitor and a resistor are connected in series to asource of emf. If emf = 6.00 V, C = 22.0 µF,and R = 100 , find the following. the time constant of the circuit
Vi = 10-3 m3 chamber of a gas bottle contains some argon gas (atomic weight = 0.040 kg/mole) at a pressure of 104 Pa and a temperature of 22° C. Illustrate what is the number density of atoms in this chamber?
straight upward at +72.5 m/s from a height of 96.0 m, at the edge of a sheer cliff. The projectile falls, just missing the cliff and hitting the ground below. Find the time it takes to hit the ground at the base of the cliff
You need a 2m long wire to carry a current of 10 mA, but you can find only a 1m copper wire with resistance 1 milli-ohm and a 1m wire made of some other metal. this second wire has the same length and diameter as the first wire but a resistance of..
a 2 kg block travels around a 0.5m radius circle with an angular speed of 12 rad/s. what is the resulting torque
A square copper plate has a circular hole in its center. Each side of the plate is 23.52 cm, and the radius of the circular hole is 7.827 cm. find the radius of the hole
Water is pumped steadily out of a flooded basement at a speedof 5.5 m/s through a uniform hose of radius 1.1 cm. What is the power of the pump
A charged particle moving with speed, v, enters a region containing a uniform magnetic field, Starting from Newton's second law, derive the formula for the radius of the particle's orbit in terms of its mass, m, speed, v, and the magnetic field, B
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