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If the temperature outside is a freezing -15 (celsius), and as you drive at 60 km/h, you see a police car heading towards you. Its siren frequency is 10 % higher than normal. How fast is the police car traveling?
Two crates, of mass 75 kg and 105 kg, are in contact and at rest on a horizontal surface. A 732 N force is exerted on the 75.00 kg crate.
You throw a stone vertically upward with an initial speed of 6.0 m/s from a third-story office window, Find the time the stone is in flight
Three horizontal forces (the only horizontal ones) act on a box sitting on a floor. One (call it F1) acts due east and has a magnitude of 150lb, Find the magnitude of the third force
When the crate is moving, the frictional force between the floor and the crate has a magnitude of 122.0 N. If the crate starts from rest, explain how fast will it be moving after the man has pulled it a distance of 2.30 m?
A 1110 N uniform beam is attached to a vertical wall at one end and is supported by a cable at the other end. A 1960 N crate hangs from far end of beam.
Suppose a particle with mass m is released from rest in a uniform gravity g, write down the relativistic equation of motion and find an expression that gives the relationship between velocity and time
A sports car moving at constant speed travels 90 m in 4.9s. If it then brakes and comes to a stop in 4s, what is its acceleration? Express the answer in terms of g's, where g = 9.80 m/s2. (Take the positive direction to be direction of travel.)
You pull with a force of 295 N on a rope that is attached to the block of mass 20 kg, and the block slides across the floor at a constant speed of 1.2 m/s. The rope makes an angle of 35 degrees with the horizontal.
how many days would be required to move one of the charges.
Perform the following unit conversions for parts (A) in the table below (B) through. Show your work using a step-wise approach.
It's possible to use the ideal-gas law to show that the density of the earth's atmosphere decreases exponentially with height, What is the weight of a column of air
How many electrons are transferred. What is the smallest thickness of a soap film that would appear black if illuminated with 490 light? imagine there is air on both sides of the soap film.
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