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Q. A hot (70 C) lump of metal has a mass of 250 gm and a specific heat of .25 cal/gm-C. John drops the metal into a 500 gm calorimeter (specific heat of .10 cal/gm-C) containing 75 g of water at 20 C. Once they reach equilibrium, what will be the final temperature?
Q. The loaded cab of an elevator has a mass of 3*10^3 kg and moves 202 m up the shaft in 23 s at constant speed. At what average rate does the force from the cable do work on the cab?
Determine the new planets mass density to earth mass density
With what minimum speed should you toss a 140g ball straight up to hit the 11.0m-high roof of the gymnasium if you release the ball 1.30m above the ground? Resolve this problem using energy.
If an astronaut can throw a certain wrench 14 {rm m} vertically upward on earth, how high could he throw it on our moon if he gives it the similar starting speed in both places.
An explosive charge imparts a velocity of 10,350 feet per second to a mortar as it exits the muzzle of mortar. If the mortar is elevated at 80 degrees what are the horizontal and vertical velocities on the mortar shell.
A motorcycle daredevil plans to ride up a 2.50m high 25.0° ramp, sail across a 10-m-wide pool filled with hungry crocodiles, and land at ground level on the other side.
How greatly time elapses before the compass hits the ground
Consider an angular motion. If the displacement is given as 250teθ, and the radius r is constant, derive the expressions for the angular velocity θ=ω, angular accelerationα, linear displacements, linear velocitytv, normal accelerationna, and tange..
Physics 1401 problems about rotational motion and angular displacement and angular velocity and angular acceleration about height problems.
A 12.0 m long conveyor belt, inclined at 40.0°, is used to transport bundles of newspapers from the mailroom up to the cargo bay to be loaded on to delivery trucks. Each newspaper has the mass of 1.00 kg, and there are 26 newspapers per bundle. Concl..
If it started falling from an upright position, what was the initial angular acceleration of the structure? suppose that the bottom did not slide across the floor and that it did not fall out of plane; that is, during the fall, the structure remained..
Unpolarized light travels throughout 2 linear polarizers. What (minimum) angle should the second polarizer be relative to the first polarizer (the difference between q1 and q2) so that the final intensity of light is 1/3 original value.
As part of a safety investigation, two 1900 {rm kg} cars travelling at 19 {rm m/s} are crashed into different barriers. Find the average forces exerted on (a) car that hits a line of water barrels and takes 1.8 {rm s} to stop, and (b) car that hits a..
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