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A fire hose 4 cm in diameter is capable of spraying water at a velocity of 20 m/s. For a continuous horizontal flow of water, what horizontal force should a fireman exert on the hose to keep it stationary?
A solid, uniform disk of radius 0.250 m, Find the angular speed of the disk at the bottom of the ramp
Two 7.0mm×7.0mm electrodes with a0.10-mm-thick sheet of Mylar between them are attached to a 9.0V battery. find the charge before and after the Mylar is withdrawn
A spherical shell has an outside radius of 2.6cm and an inside radius of a. The shell wall has uniform thickness and is made of a material with density 4.70g/ cm3. The space inside the shell is filled with a liquid having a density of 1.23g/cm3.
You are on an airplane traveling 30° south of due west at 160.0 m/s with respect to the air. What is the heading of the plane with respect to the ground
A shot-putter accelerates a 7.3kg shot from rest to 17m/s, If this motion takes 1.3s , what average power was developed
A 15.0 ampere current flows through a 3.25 m section of wire, perpendicular to a 0.250 T magnetic field. What is the magnitude of the force exerted by the field on the wire section
The air inside a bicycle tire pump has 172 joules of work done on it as 64.8 joules of heat is conducted away from it
1.) A 0.50kg bullfrog is sitting at rest on a level log. How large is the normal force of the log on the bullfrog. 2.) A second 0.50kg bullfrog is on a log tilted 38 above horizontal. How large is the normal force of the log on this bullfrog
Suppose the highway is icy and the coefficient of friction between the tires and pavement is only one-third what you found in part A. Illustrate what should be the maximum speed of the car so it can round the curve safely?
A car rounds a 200 m radius curve at 10.5 m/s. If the horizontal force acting on the car is 790 N, what's the car's mass
A child launches an air powered toy rocket up into the air giving it an initial velocity of 6m/s at an angle of 80degree above the horizontal. How long after the rocket is launched does it take for the rocket to hit the ground
The length between lenses equals 1m, the eyepiece has a focal point of 32mm, what is the magnification of an object at infinity
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