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An unknown material has a normal melting/freezing point of -26.3 ° C, and the liquid phase has a specific heat capacity of 160 J/(kg · C °). One-tenth of a kilogram of the solid at -26.3 ° C is put into a 0.143-kg aluminum calorimeter cup that contains 0.095 kg of glycerin. The temperature of the cup and the glycerin is initially 28.3 ° C. All the unknown material melts, and the final temperature at equilibrium is 19.6 ° C. The calorimeter neither loses energy to nor gains energy from the external environment. What is the latent heat of fusion of the unknown material?
J/kg
Earth's atmosphere, the electric field above Earth's surface has been measured to be 150 N/C downward at an altitude of 250 m and 165 N/C downward at the altitude of 400 m. compute the volume charge density of the atmosphere.
What was the change in velocity of the scooter.what mass may be placed 2 cm away from the other end of the bar to keep the bar horizontal.
A hunter aims directly at the target (on the same level) 115 m away. If the bullet leaves the gun at a speed of 205 m/s, by how much will it miss target.
A hot-air balloon is ascending at the rate of 11 m/s and is 68 m above the ground as a package is dropped over the side. How long does it take to reach the ground.
Consider a collection of 4 "Fermi" dice. That is, no two die may have the same face up. What is the average value of the sum of the dice
The electric field between the plates of the velocity selector is 4900 V/m, and the magnetic fields in both the velocity selector, compute the radius r of the path for a singly charged ion with mass m = 4.29 10-26 kg
How much energy is transferred to the water as heat
Analyze Trial Balance and indicate possible adjusting entries that might be necessary before an accurate set of financial statements could be prepared.
Two rocks collide in outer space. Before the collision, one rock had mass 15 kg and velocity ‹ 4300, ?2700, 2350 › m/s. what is the velocity of the other rock
When the skateboarder reaches the highest point, how far is this point horizontally from the end of the ramp.
A 50 kg bag of sand at 25 C falls 10 m onto the pavement and comes to an abrupt Stop. What is the change in internal energy in the sand
Find the speed of water emerging from the hole if the leak is 2.9 below the surface of the water
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