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In a certain solar house, energy from the Sun is stored in barrels filled with water. In a particular winter stretch of five cloudy days, 0.934 × 106 kcal is needed to maintain the inside of the house at 21.5oC. Assuming that the water in the barrels is at 46.8oC and that the water has a density of 1.00 × 103 kg/m3, what volume of water is required? Take the specific heat of water to be 1.00 kcal/kg.
a water-skier is moving at a speed of 11.0 ms. when she skis in the same direction as a traveling wave she springs
A lamp (R = 151 ohms ), an electric heater (R = 24 ohms ), and a fan (R = 50 ohms ) are connected in parallel across a 119 V line. What power is expended in the heater
a person scuffing her fee on a dry day accumulates a net charge of -42 uc. how many excess electrons does she get and
a cubit is an ancient measurement of length that was defined as the distance from the elbow to the tip of the finger.
A frequency generator (a device that produces sinusoidal signals whose frequency and amplitude can be independently set) is used to power a horn. The frequency is set to 2000Hz, and for a particular amplitude the sound intensity is measured to be..
Assume that the earth is a uniform sphere and that its path around the sun is circular. Calculate the kinetic energy that the earth has because of itsmotion around the sun.
The atoms in a regular crystal can act as slits for light of the appropriate wavelength. What wavelengths do you think would be appropriate
Block A in Figure is given an initial velocity of 6 m/s up the incline. Declare of a block on a inclined plane.
An automobile crankshaft transfers energy from the engine to the axle at the rate of 53.6 kW when rotating at a speed of 1250 rev/min. What torque does the crankshaft deliver?
Calculate ?A for the isothermal compression of 2.95 mol of an ideal gas at 325 K from an initial volume of 60.0 L to a final volume of 20.5 L. Does it matter whether the path is reversible or irreversible?
Two objects with masses of 3.80 kg and 5.40 kg are connected by a light string that passes over a frictionless pulley, Determine the distance each object will move in the first second of motion if both objects start from rest
An arrow is launched vertically upward from a crossbow at 97.9 m/s. What is its average speed up to that moment
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