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A 500 watt heater is used to heat water in a plastic bucket. Assume that 90% of the heat produced by the heater goes into heating the water. How long does it take for 2 kg of water at 100 degrees C to completetly change to steam at the same temperature? (Latent heat of vaporization of water is 2260 kJkg-1)
Announcers at a certain radio station say that they are at "95 FM on your dial," meaning that they transmit at a frequency of 95 MHz, find the wavelength of the radio waves from this station
A copper beaker of mass 0.20 kg contains 0.10 kg of water at 20.0degree C. A block of silver of mass 100 g at 90.0 degree C is added to the beaker of water. The entire system is thermally insulated from the surroundings, (specific heats- copper: 3..
You are designing a process to store pressurized argon gas (a monatomic gas). If you pressurize the gas at a constant temperature, how much work must be done on the gas
A small block of mass 20.0 grams is moving to the right on a horizontal frictionless surface with a speed of 0.500 m/s. What is the speed of the 40.0 gram block after the collision
on one particular shot, his 1.00 g pellet gets stuck in the cheese, causing it to slide 25 cm before coming to a stop. If the muzzle velocity of the gun is 64m/s and cheese has a mass of 98 g, what is the coefficient of friction between the cheese..
A plank 2.00 cm thick and 14.9 cm wide is firmly attached to the railing of a ship by clamps so that the rest of the board extends 2.00 m horizontally over the sea below. find the shear modulus of the wood
a vessel at rest explodes breaking into three pieces. two pieceshaving equal mass fly off perpendicular to one another
Two capacitors are connected to a battery. The battery voltage is V = 90 V, and the capacitances are C1 = 2.00 ?F and C2 = 4.00 ?F. Determine the total energy stored by the two capacitors
An automobile of mass 1500 kg moving at 25 m/s colides with a truck of mass 4500 kg at rest. What is the final velocity of the truck after the collision
A 23.7 g bullet is shot into a 4706 g wooden block standing on a frictionless surface. The block, with the bullet in it, acquires a velocity of 0.982 m/s. Calculate the velocity of the bullet before striking the block. Amswer in units of m/s.
What net torque must be applied to the wheel. How several meters would the molecule.
what speed will the dart leave the gun.
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