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Question: A household pays $1850 per year for the supplied electricity. Assuming the rate of $0.11 per KWh and 10 hours of average consumption per day, find the average power of energy consumption.
A light ray is incident from air onto the surface of a very quiet lake. what is the index of refraction of the water
The area of a typical eardrum is about 5.0 × 10?5 m2. Calculate the sound power incident on an eardrum at the threshold of pain
Light of wavelength 630 nm passes through a grating and then onto a screen located several meters from the grating. Determine the wavelength of the second source
A laser is mounted in air, m above the edge of a large, horizontalpane of crown glass (n = 1.520), as shown in the drawing. The laser is aimed at the glass in such a way that thereflected beam is 100% polarized.
Two astronauts are 1.40 m apart in their spaceship. One speaks to the other. The conversation is transmitted to earth via electromagnetic waves. How far away from the earth is the spaceship
A white billiard ball with mass mw = 1.48 kg is moving directly to the right with a speed of v = 3.05 m/s, what is the final speed of the black ball
A 722 kg car stopped at an intersection is rear-ended by a1620 kg truck moving w/ a speed of 14.5 m/s. What is the speed of the wreck immediately after the collision
Consider an electron in the first Bohr orbit of a hydrogen atom, (a) What is The radius (in meters) of this orbit? (b) What is the total energy (in eV) of the electron in this orbit? (c) How much energy is required to ionize a hydrogen atom when the ..
A ball player hits a home run, and the baseball just clears awall 20.6 m high located 131.0 m from home plate. The ball is hit at an angleof 35° to the horizontal, and airresistance is negligible. Assume the ball is hit at a height of1.0 m above t..
A 67.0 kg diver is 4.90 m above the water, falling at speed of 6.40 m/s. Calculate her kinetic energy as she hits the water
Starting at rest, two students stand on 11.5-kg sleds, which point away from each other on ice, and they pass a 5.50-kg medicine ball back and forth. How fast is the student on the right moving after the pass
A gardener pushes a box of tools across a driveway by applying a 20.5- N force that pushes downward at an angle of 34.9 o with respect to the horizontal
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