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An unknown material has a normal melting/freezing point of -25.1° C, and the liquid phase has a specific heat capacity of 160 J/(kg · C°). One-tenth of a kilogram of the solid at -25.1° C is put into a 0.161-kg aluminum calorimeter cup that contains 0.108 kg of glycerin. The temperature of the cup and the glycerin is initially 24.7° C. All the unknown material melts, and the final temperature at equilibrium is 21.6° 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?
A particle (Mass=m, charge=e, and Energy=E) is incident on a potential barrier from x
A transformer has 30 turns of wire in its primary and 76 turns in its secondary. What is the output potential difference
On a workday an average decibel level of the busy street is 89 dB, with 100 cars passing a given point every minute. If the number of cars is reduced to 30 every minute on a weekend, what is the decibel level of street.
The two plates of a parallel plate capacitor are 5.8 mm apart and have a potential difference between the of 220 V. Find the magnitude of the electric field between the plates
A rocket of mass kg is in flight. Its thrust is directed at an angle of 60 degrees above the horizontal and has a magnitude of. Find the magnitude and direction of the rockets acceleration.
Two objects are maintained at constant temperatures, one hot and one cold. Two identical bars can be attached end to end, as in part a of drawing, or one on top of the other, as in part b. When either of these arrangements is placed between the hot a..
1. how many kg of coal are used to supply 1500 watts to heat a barn for 7 hours? the energy content of coal is 19 x 106
Find the Youngs modulus for the muscle tissue
A fish appears to be 2.00 m below the surface of a pond when viewed almost directly above by a fisherman. What is the actual depth of the fish
In a series R-L-C circuit, R= 300oms, Xc=300oms and XL=500 oms . The average power consumed in the resistor is 60.0 W. What is the power factor of the circuit
An interplanetary spaceship passes through the point in space where the gravitational forces from the moon and the earth on the ship exactly cancel. How far from the center of the earth is it
A 1.5-V battery is connected in series with a 3.3-k? resistor, a 4.7-k? resistor, and a 1.0-k? resistor. Calculate the current (in mA) through and the voltage (in V) across each resistor
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