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Question1
As at rest, two trains has sirens that release a frequency of 300 Hz. The trains travel toward one another and toward an observer stationed between them. One of the train's moves at 30.5 m/s, and an observer hears a beat frequency of 2.4 beats per second. What is speed of the second train, which travels faster than 30.5 m/s?
Question2
The burner on an electric stove has a power output of 2.0 kW. An 810g stainless steel tea kettle is filled with 20 C water and placed on the already hot burner. If it takes 2.90 min for water to reach a boil, what volume of water, in cm^3, was in the kettle? Stainless steel is mostly iron, so you can suppose its specific heat is that of iron.
Transverse waves with a speed of 59.0 m/s are to be produced on a stretched string. A 4.95-m length of string with a total mass of 0.0600 kg is used. Calculate the wave speed in the string
A dockworker applies a constant horizontal force of 88.0N to a block of ice on a smooth horizontal floor. The frictional force is negligible. What is the mass of the block of ice
The ball rebounds straight upward to a height of 0.660 m. illustrate hat are the magnitude and direction of the impulse of the net force applied to the ball during the collision with the floor.
Find out the minimum acceleration of the antelope.
Since you are pulling up a little on the crate, the floor doesn't have to support as much weight. When you are pulling up on the rope as described above, what is the upward force that the floor exerts on the crate.
Find the angular velocity of a centrifuge in which a particle 10 cm from the axis of rotation experiences a radial acceleration of 10^3 times g
question1assume that we have the hydrogen atom and the electron in the hydrogen atom is in the n 4 state. what should
A horizontal board weighing 198 N is supported at points A and B. The plank serves as a platform for a painter, who weighs 558.5 N. Find out the maximum distance D, such that the plank would not tip, no matter where the painter stands.
A horizontal block-spring system with the block on a frictionless surface has total mechanical energy E = 39.1 J, What is the kinetic energy of the system at the equilibrium point
A point charge Q is trapped at the center of a thin-walled hollow conductive sphere of radius R, How much charge will collect on the inside surface of the hollow sphere
A charge of -2.85 µC is fixed at the center of a compass. Two additional charges are fixed on the circle of the compass, which has a radius of 0.105 m.
Now suppose that the two masses continue to move at the speed from Part A until they encounter a rough surface. The coefficient of friction between the masses and the surface is . If the blocks come to rest after a distance, which of following equ..
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