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The current in an electro magnet connected to a 240 V line is 14.5A.At what rate must cooling water pass over the coils if the water temperature is to raise by no more than 7.50C ?
Two converging lenses are placed such that they are three focal lengths apart. What is the linear magnification of the lens system
The isotope 226 Ra Alpha decays. its measured atomic mass is 226.02541 amu, the daughter nucleus has a mass of 222.01758 amu and helium has atomic mass 4.0026 amu. calculate the kinetic energy of the alpha particle
An amazing parent pushes their child's sled (total mass = 65kg) so that the sled is moving at 5 m/s at the top at the sledding hill which makes a 20 degree angle with the horizontal. calculate the speed of the sled
An ultrasound unit sends a 2.4 MHz sound wave into a 35cm long tube filled with an unkown liquid. What is the speed of the sound in the liquid
Explain why the electrostatic interaction in ionic solids would (if alone) result in the collapse of the crystal to zero size and what it is that prevents this collapse in real crystals (be sure to be explicit)
A frictionless pulley (I=1/2MR^2) has a mass of 2.50kg and a radius of 20.0cm. how much kinetic energy does the stone have
A spaceship leaves Earth traveling at 0.65 c. A second spaceship leaves the first at a speed of 0.80 c with respect to the first. Calculate the speed of the second ship with respect to Earth if it is fired directly backward toward Earth
The air inside a bicycle tire pump has 172 joules of work done on it as 64.8 joules of heat is conducted away from it
An airplane is flying with a velocity of 82 at an angle of 25 above the horizontal. When the plane is a distance 125 straight above a dog that is standing on level ground, a suitcase drops out of the luggage compartment. How far from the dog will ..
A rifle with a barrel length of 56 fires an 8 bullet with a horizontal speed of 350. The bullet strikes a block of wood and penetrates to a depth of 14. (a) What resistive force (assumed to be constant) does the wood exert on the bullet? (b) How long..
In a particular region of the earth's atmosphere, Calculate the volume charge density of the atmosphere assuming it to be uniform between 258 and 402 m. Neglect the curvature of the earth
The pluto atmosphere has carbon monoxide in it. CO has a rotational constant of 1.73 cm-1. What is the temperature of the Pluto atmosphere
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