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Calculate how many grams of ice at 0°C would be melted by 100 g of 100°C steam. Hint: heat will be transferred from the steam to the ice in two processes: (a) the steam will condense into liquid, and (b) that liquid will transfer heat until it is at the freezing point of water. Note that for water: Lf = 80 cal/g, and Lv = 540 cal/g
2.00 moles of an ideal gas is at a pressure of 1.50 atmospheres, What is the average kinetic energy per particle in the gas
A 50 kg diver steps off a 10 m high platform and strikes the water below in 1.43 seconds. determine the average frictional force that stopped his motion while in the water
There are four charges, each with a magnitude of 1.6 µC. Two are positive and two arenegative. Find the magnitude of the net electrostatic force experienced by any charge
Consider a piston weighing 990 g which contains 10 g of air at 1 atmosphere and 25?C. Calculate the effects of performing 100 Joule of work on this air-containing piston for the following three situations.
A small stereo amplifier produce a sound of 50 db at a distance of 20 ft from speaker. What must insensitive be to double the sound level to 100 db?
You throw a ball straight up at 45 m/s. How many seconds elapse before it is traveling downward at 8 m/s
Two waves are traveling in the same direction along a stretched string. The waves are 45.0° out of phase. Each wave has an amplitude of 7.00 cm. Find the amplitude of the resultant wave
What is the average pressure on the soles of the feet of a standing 80.7-kg person due to the contact force by the floor? Each foot has a surface area of 0.021 m2.
A bullet with mass m = 20.0 g is fired horizontally towards the center of mass of the disk with a speed of v0 = 500m/s. In unit vector notation, what is the angular momentum L of the bullet with respect to point P just before it collides with the ..
A 900 g rubber ball is dropped from a height of 14 m and undergoes a perfectly elastic collision with the earth. What is the earth's velocity after the collision
gas is stored in a rigid container at 7 degrees c. the volume of the container is 2 cubic meters. the initial gauge
An aluminum flagpole is 34 m high. (The linear expansion coefficient of aluminum is 23 x 10-6 °C. By how much does its length increase
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