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A section of copper paneling is constructed with an area of 0.85 m^2 and a thickness of 0.04 inches. If the copper paneling is initially lying on the ground and the ground is at a temperature of 4 oC and the Air is at 21.11 oC how much energy is conducted through the paneling in a 5 hour period? You can assume that the temperature does not change from the given values for the ground or air for that 5 hour period.
During a workout, the football players at State U. ran up the stadium stairs in 60 s. The stairs are 150 m long and inclined at an angle of 30°. estimate the average power output on the way up
he rest energy of an electron is 0.511 MeV. The rest energy of a proton is 938 MeV. Assume both particles have kinetic energies of 2000 MeV. Find the speed of the proton
The component of the external magnetic field along the central axis of a 18-turn coil of radius 28.0 cm decreases from 1.90 T to 0.550 T in 2.10 s. What is the direction of the current
You are holding a 5 kg dumbbell straight out at arm's length. Assuming your arm is 0.62 m long, what torque is the dumbbell exerting on your shoulder
A heat engine absorbs 47.0 kJ and exhausts 36.0 kJ of heat each cycle. Calculate its efficiency. What is the work done per cycle
A typical ten-pound car wheel has a moment of inertia of about0.35 \; \rm kg\cdot m^2. The wheel rotatesabout the axle at a constant angular speed making 70.0 fullrevolutions in a time interval of 7.00 s.
Coherent light that contains two wavelengths, 660nm and 470nm , passes through two narrow slits with a separation of 0.290mm and an interference pattern is observed on a screen which is a distance 4.90m from the slits
An object undergoing parabolic motion travels
a swimmer is capable of swimming 0.60 ms in still water.a if she aims she aims her body directly across a 55 meter wide
What linear speed must an Earth satellite have to be in a circular orbit at an altitude of 162 km
A 75 W light bulb with a resistance of 179 ? is connected to a power supply with a 121 V. What is the internal resistance of the power supply
A vertical spring (spring constant = 119 N/m) is mounted on the floor. A 0.390 kg block is placed on top of the spring and pushed down to start it oscillating in simple harmonic motion. The block is not attached to spring.
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