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A few questions (2)
a. What property of sound waves is related to pitch?
b. What property of sound waves is related to volume?
c. What is the Doppler effect? What causes it?
d. Describe the relative speeds of sound in the different states of matter.
Explain how flight is achieved. Please provide an example and use three concepts or laws to support your explanation and example.
A microscope is focused on a black dot. When a 1.15 cm-thick piece of plastic is placed over the dot, What is the index of refraction of the plastic
300. V are applied to a motor with a windings resistance of 65.0 ohms. At the maximum motor speed the back emf is 155. V. Find the current in windings as the motor starts
Determine the radius of curvature ρ of the vertical profile of the road at A.
A 4.90 gram coin is located 17.0 centimeter from the center of a turntable. Find the maximum angular velocity with which turntable can spin without the coin sliding
A crate of mass 10.5 kilogram is pulled up a rough incline with an initial speed of 1.50 m/s. Find how much work is done by the 100 Newton force
An 8.5 x 11cm sheet of metal is illuminated by a light source located 1.3m directly above it. What is the luminous flux falling on the metal if the source has an intensity of 200cd? What is the total luminous flux emitted by the light source?
An 30-kg person puts on a life jacket, jumps into the water, and floats. The jacket has a volume of 2.8x10^(-2) m^3 and is completely submerged under the water. What is the density of the life jacket
Proton one moves twice as fast as proton two. The magnitude of the magnetic field in which proton one is immersed is twice the magnitude of the magentic field in which proton two is immersed.
a) Write the correct energy equation, i.e. in the form of how changes in energy relate to each other. b) Calculate the speed requested above.
On a banked race track, the smallest circular path on which cars can move has a radius of 103 meter, while the largest has a radius of 165 meter. Determine the largest speed at which cars can move on this track without relying on friction
1. an object is at distance s from a thin glass lens of focal length f. the lens is surrounded by air. the image is at
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