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The sound intensity at a gasoline station next to a freeway averages 10^-3 W/m2. The owner decides to collect this energy and convert it to thermal energy for heating his building.
Assuming that this conversion is 100% efficient, what is the length of one side of a square sound collector that is needed to provide thermal energy at a rate of 480W ?
the projection lens in a certain slide projector is a single thin lens. a slide 24.5 mm high is to be projected so that
At 17°C, a rod is exactly 18.91 cm long on a steel ruler. Both the rod and the ruler are placed in an oven at 240°C, What is the coefficient of thermal expansion for the material of which the rod is made
A 70 ohm lamp and a 75 ohm lamp are connected in series and placed across a potential of 41 V. What is the equivalent resistance of the circuit
q1. show a analyse to find the time in years that it would take to travel to relatively nearby barnards star which is
a pump is used to empty a 4000 l wading pool. the water exits the 3.0-cm-diameter hose at a speed of 2.2 ms .how long
Estimate the pressure exerted on a floor by (a) one pointed chair leg (60 kg on all four legs) of area=0.020 cm^2, and (b) a 1500-kg elephant standing on one foot (area=800 cm^2).
the fermi level lies 0.520 ev above the valence band in a sample of silicon at 300k. this should be a p type material.
Two charges of magnitude 6.0 microC, but opposite signs (left positive, right negative) are placed at the corners of the base of an equilateral triangle 2.0m on a side. What is the electric potential at the vertex due to these charges?
The pendulum pictured above has a length of 15.0 cm when it is displaced to the right of the peg, Determine the period for this pendulum close to the surface of the Earth
A beam of light traveling in water (n=1.33) is incident on a glass surface (n=1.52). At what angles of incidence will the outgoing light is fully polarized
A vector is located in the x-y plane. The x component is 4.00 m and the y component is 3.00 m. Find the angle that this vector makes with the positive y-axis
A swimming pool has dimensions 32 m 11 m and a flat bottom. When the pool is filled to a depth of 2.10m with fresh water, what is the force caused by the water on the end that is 11m.
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