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Q1. Over a 30-day period a power plant generates an average of 751 MW of electrical power and 1225 MW of waste heat, and burns 1.83×108 kg of coal. Imagine that it takes 2.30 kg of oxygen to burn 1.00 kg of coal. (The actual amount varies with the type of the coal). What is the total mass of the reagents used in the combustion throughout the 30 days?
Q2. A spring with spring constant 14 hangs from the ceiling. A ball is attached to the spring and authorized to come to rest. It is then pulled down 3.0 and free. The ball makes 17 oscillations in 16 seconds. What is it the mass of the ball?
The fundamental frequency of a pipe that is open at both ends is 598Hz. How long is this pipe
An electron and a proton are initially very far apart (effectively an infinite distance apart). They are then brought together to form a hydrogen atom, in which the electron orbits the proton at an average distance of 5.40 10-11 m. What is EPEfina..
A 1225 kg automobile starts from rest on a horizontal road and gains a speed of 83 km/h in 38 s. What is the average power required of the car during the 38 s interval
A conducting sphere that carries a total charge of -9.1 µC is placed at the center of a conducting spherical shell that carries a total charge of +1.7 µC. Determine the charge on the outer surface of the shell
question1hold switch closed. place a magnetic field sensor between the turns of the slinky by its center. rotate the
The box of a well-known breakfast cereal states that one ounce of the cereal contains 107 Calories (1 food Calorie = 4186 J). what is the weight of the heaviest barbell
A 0.025 kg golf ball moving at 21.0 m/s crashes throughout the window of a house in 2.0 10-4 s. After the crash, ball continues in the same direction with a speed of 10 m/s. assuming the force exerted on the ball by the window was constant, what w..
Astronomers discover an exoplanet (a planet of a star other than the Sun) that has an orbital period of 3.03 Earth years in its circular orbit around its sun, Find the radius of the exoplanet's orbit in meters
A sheet of glass is coated with a 496 nm thick layer of oil (n = 1.42). What is the color of the most part of transmitted light
What are the forces acting on the board due to the two supports as a diver of mass 63 kg stands at the end of the board over the water.
A comet has a very elliptical orbit with a period of 124.0 y. If the closest approach of the comet to the Sun is 0.09 AU, what is its greatest distance from the Sun
A friend is standing on a giant skateboard that is initially at rest. If you avoid frictional effects with the floor, what is the momentum of the skateboard if your friend walks to the right on skateboard with a momentum of 150 kg.m/s? What is the..
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