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A projectile is fired at an upward angle of 45 degrees from the top of a 265 m cliff with a speed of 350 m/s. Illustrate what will be it's speed when it strikes the ground below?
A man drags a 72.0 kg crate across the floor at a constant velocity by pulling on a strap attached to the bottom of the crate. The crate is tilted 26 degrees above the horizontal, and the strap is inclined 68 degrees above the horizontal. The center ..
Assuming that all the heat generated by the resistor is absorbed by the solid substance, and that it takes 4 minutes to raise the temperature from 20to 80 degrees C, compute the specific heat for the substance.
The impact with the racket gives the ball a constant acceleration over a distance of 47 cm. Illustrate what is the magnitude of the net force acting on the ball?
To pump 100Joules of heat from the ice cube tray of freezing water at 273K, out into a hot room at 310 K, the laws of thermodynamics say that you will need at least how many Joules of ordered energy or work.
The effects of the spin of the earth
A 02385 mH inductor has a length that is four times its diameter. If it is wound iwth 10.3 cm^-1 truns per centimeter, what is the length? Answer in units of m.
baseball toward home plate at 85 miles per hour with a spin of 1800 revolutions per minute. Explain how many rotations does it make on a path of 60 feet?
How far from a point on the floor directly below the edge. Why is it a good idea to have your hand extended forward when you are getting ready to catch the fast moving baseball with your bare hand.
A uniform plank of length 5.8m and weight 229N rests horizontally on two supports, with 1.10 m of the plank hanging over the right support (see the drawing). To what distance x can a person who weighs 450N walk on the overhanging part of the plank be..
A 15.0{rm cm}-diameter non-conducting sphere carries a total charge of 2.25 mu {rm C}, distributed uniformly throughout its volume. Graph the electric field E as a function of the distance r from the center of sphere from r = 0 to r = 30.0{rm{ cm}..
A certain airplane has a speed of 250.0 km/h and is diving at an angle of 30.0° below the horizontal when the pilot releases a radar decoy. The horizontal distance between the release point and the point where the decoy strikes the ground is 700 m..
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