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An aluminum calorimeter with a mass of 100 g contains 250 g of water. The calorimeter and water are in thermal equilibrium at 10.0°C. Two metallic blocks are placed into the water. One is a 100.0-g piece of copper at 50.0°C. The other has a mass of 70.0 g and is originally at a temperature of 100°C. The entire system stabilizes at a final temperature of 20.0°C.
(a) Determine the specific heat of the unknown sample. need you answer in J/kg · °C.
Because it can go from rest to 27.0 m/s (about 60 mi/h) in 4.0 s, one of the fastest-accelerating animals is the cheetah. determine the average power developed by the cheetah
A harmonic wave travels in a wire with amplitude 6.05 mm, wavelength 0.451 m, and frequency 462 Hz. What is speed with which the wave travels.
A car is traveling at 29m/s when the driver spots a large pothole in the road the distance 37 m ahead. She immediately applies her brakes. If her acceleration is -6.60m/s2, does she manage to stop before reaching pothole.
An object is placed to the left of a lens, and a real image is formed to the right of the lens. How far from the lens is the object
A hurricane wind blows across a 7.50m × 16.4m flat roof at a speed of 180km/hr, How much force is exerted on the roof
A pair of long rods, each of length L and mass M are connected to a hoop of mass M and radius L/2 to form a 4-spoked wheel. Determine the instantaneous velocity of the mass after the wheel has turned one revolution
The expected and the actual rate of return on plan assets for 20X9 was 10%. There are not other components of Loch's pension expense. Illustrate what amount should Loch report in its December 31, 20X9 balance sheet as prepaid pension cost?
Consider the reaction 4He + 40Ca -> 3H + 21Sc Find the minimum laboratory kinetic energy for the 4He projectile if 40Ca is stationary
an oxide cathode of a vacuum tube has a work function of 2.0 eV. Calculate the electron flux (number per time per area) from thermal emission when the cathode is heated to 1000 K
A nickel has a mass of about 5 grams. If all of this mass could be converted to energy, how many Hiroshima sized bombs would this be
Carl and Lenny are trying to find Carl's keys that are beeping-he attached a device to beep when you whistle for this purpose, how far is Lenny from the key's
Draw a plot of ct vs x showing the positions of the three spaceships and of the light pulses vs. time, in Earth's frame. Find the times, according to the Earth frame, at which the pulses from ships C and A reach ship B.
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