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A 818 kg car is going 28 m/s and the driver has to slam on his brakes to prevent an accident. Assume that a total of 23.4 kg of iron in the brake pads and rotors absorb the heat produced by the friction between the brake pads and rotors. After the car has stopped, what is the change in temperature of the brake pads and rotors?
A hydrogen atom in the ground state absorbs a 13.06eV photon. find the wavelength of the photon emitted in this quantum jump
A long, straight telephone cable contains six wires, each carrying a current of 0.300A, If the currents in all six wires are in the same direction, what is the magnitude of the magnetic field 2.70 m from the cable
An ice-making machine inside a refrigerator operates in a Carnot cycle. It takes heat from liquid water at 0.0 degrees Celsius, How much heat |Q_H| is rejected to the room
Imagine that in a certain proton accelerator, roughly 1011 protons at a time go around a ring having a radius of 4.0 km, What is the current flowing in the ring, in amperes
Most workers in nanotechnology are actively monitored for excess static charge buildup. what is the max number of steps any worker should be allowed before touchingthe components
What fractional increase in tension of one wire will lead to the occurrence of 2 beats/s when both wires oscillate simultaneously.
A photographer uses his camera, whose lens has a 60mm focal length, to focus on an object 2.5m away. How far must the lens move to focus on this second object
An electromagnetic wave has an electric field given by E? (y,t)=[ 3.60×105V/m cos(ky?(1.250×1013rad/s )t)]k^. In which direction is the wave traveling
An ambulance driver traveling at 33.0 m/s honks his horn as he sees a motorist ahead on the highway, Calculate the proper frequency of the ambulance's horn
A cubic box of volume = 0.34300m^3 is filled with air at atmospheric pressure at 20.000*C. What is the net force on one side of the box
A 360 kg piano slides 3.1 m down a 25 degree incline and is kept from accelerating by A man who is pushing back on it parallel to the incline, Determine the work done on the piano by the man
When the starter motor on a car is engaged, there is a 330A current in the wires between the battery and the motor. Suppose the wires are made of copper and have a total length of 1.5m .
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