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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
The current in a long solenoid of 95 turns generates a magnetic flux within it of 65.0 mWb per turn. what will be the induced emf
David is driving a steady 21.0 m/s when he passes Tina, who is sitting in her car at rest. Tina begins to accelerate at a steady 2.80 m/s^2 at the instant when David passes.
What is the (a) magnitude and (b) angle (measured relative to the positive direction of the x axis) of the asteroid's acceleration.
illuminate the object with the flashlight. One way to produce artificial gravity in a space station is to spin it.
The distance from the thrower's axis of rotation to the hammer head is 1.2 m. The hammer has a mass of 7 kg. What is the linear (tangential) velocity of the hammer head
A current I = 13.0 A flows through a strip of metal of width 4.0 cm, What is the drift velocity of the carriers in the strip
For alpha particles of energy 7.68 MeV scattered from a platinum foil two microns thick, find the collision diameter
The Cosmic Background Radiation Outer space is filled with a sea of photons, created in the early moments of the universe. What is the peak frequency of this radiation
You are at a rock concert, and the sound intensity reaches levels as high as 100 dB. Calculate the amplitude of this oscillating force
Two capacitors are connected to a battery. The battery voltage is V= 80V, Determine the total energy stored by the two capacitors
How far from the dog would the suitcase land? You can ignore air resistance.
A 56 kg woman and a 78 kg man stand 13.0 m apart on frictionless ice, How far from the man is their center of mass
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