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15-kg of aluminum contains .2 kg of water. Initially, the water and the cup have a common temperature of 18 degrees C. An unknown material (m=.04 kg) is heated to a temperature of 97 degrees C and then added to water. The temperature of the water, the cup, and the unknown material is 22 degrees C after thermal equilibrium is reestablished. Ignoring the small amount of heat gained by the thermometer, find the specific heat capacity of the unknown material. Can someone actually help walk me through this instead of giving an answer with no explanation?
(a) What is the rate of energy radiation per unit area of a blackbody at a temperature of 294 K. (b) What is the rate of energy radiation per unit area of a blackbody at a temperature of 2940 K
A mass-spring system completes 7 full oscillations in a time of 14.4 seconds. What is the angular frequency of oscillation
A CD rotating at 1200 rpm starts slowing down at a constant rate such that, after the first two seconds, it has made 10 rotations. Find the time needed for the CD to come to rest
Three uniform spheres are located at the corners of an equilateral triangle. Each side of the triangle has a length of 1.00 m. compute the magnitude of the initial acceleration of the third sphere
A pair of hedge trimmers are 45 cm long from the pivot to the end of the handles. If the person applies of a force of 15 N on each handle, how much force is applied to the branch
The rifle fires a bullet with the speed 300m/s. The target is sitting on a tree 100m away from the shooter. What initial angle should be the rifle directed to hit a target
The height of a helicopter above the ground is given by h = 3.00 t3, where h is in meters and t is in seconds. After 2s, the helicopter releases a small mailbag. How long after its release does the mailbag reach the ground.
Rubidium atoms are cooled to 0.22 uK in an atom trap. What is their de Broglie wavelength
One swimmer in a relay race has a 0.49 s lead and is swimming at a constant speed of 3.97 m/s. the swimmer has 57.7 m to swim before reaching the end of the pool
What is momentum of the block
A 0.33-m-long violin string has a mass of 0.89 g. The peg exerts a 45 N force on it. Determine the lowest frequency sound produced by the vibrating sting
The vector is 3.5 long and is directed into this page. Vector points from the lower-right corner of this page to the upper-left corner of this page and has components -19.5, 25.
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