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The energy given off by 300 grams of an alloy as it cools through 50 degrees Celcius raises the temperature of 300 grams of water from 30 degrees Celsius to 40 degrees Celcius. The specific heat of the alloy (in cal/gK) is what?
A loaded ore car has a mass of 950 kg and rolls on rails with negligible friction. It starts from rest and is pulled up a mine shaft by a cable connected to a winch, What maximum power must the motor provide
A nuclear power plant has an electrical power output of 1700 MW and operates with an efficiency of 34%. what is the rise in temperature of the flowing water
The potential difference between two parallel conducting plates in vacuum is 165 V. An alpha particle with mass of 6.50×10-27 kg and charge of 3.20×10-19 C is released from rest near the positive plate. What is the kinetic energy of the alpha particl..
Ball rolls 60cm to the porch's edge, drops 40 cm, continues rollingon the grass, and eventually stops 80 cm from the porch'sedge. What is the magnitude of the ball's net displacement ,in centimeters?
Suppose that an insulating container of negligible mass contains 0.12 kg of water at a temperature of 4 degrees C. what is the final mass (in kg) of the water in the system
Find the maximum rms current allowed in the primary circuit.
A uniform disk of radius R and mass M is mounted on an axle supported in fixed frictionless bearings. find the angular acceleration and tangential acceleration
electrons ( mass m, charge -e) are accelerated from restthrough a petential difference V and are then deflected by amagnetic field B(vector) that is perpendicular to theirvelocity. What is the radius of the resulting electron trajectory
In a fast-pitch softball game the pitcher is impressive to watch, as she delivers a pitch by rapidly whirling her arm around so that the ball in her hand moves in a circle. Find the magnitude of the total acceleration of the ball
At target prctice, Scott holds his bow and pulls the arrowback a distance of 0.30m by exerting an average force of 40.00N what is the potential energy stored in the bow
A person pushes a 19.7-kg shopping cart at a constant velocity for a distance of 21.3 m on a flat horizontal surface. What is the magnitude of the force that the shopper exerts
What is the rms speed of nitrogen molecules at a temperature of 37 oC? The mass of a nitrogen molecule is 4.680×10-26 kg
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