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An artillery shell is fired with an initial velocity of 300 m/s at52.0° abovethe horizontal. To clear an avalanche, it explodes on amountain side 39.5 s after firing. What are the x and y components of the shell where it explodes, relative to its firing point?
A pump flows 100 gal/min of water. The inlet pressure is 0 psig and the outlet pressure is 20 pisg. How much electricity (kW) is required to power the motor
A car starts from rest and moves around a circular, horizontal,level track of radius 30.0 m. Its speed increases at the constantrate of 0.500 m/s2. (a) What is the magnitude ofthe net acceleration 15.0 s later?
Two children hang by their hands from the same tree branch. The branch is straight, and grows out from the tree at an angle of 33° above the horizontal. What is the magnitude of the net torque exerted on the branch by the children
A 23.0 g block of copper whose temperature is 447 K is placed in an insulating box with a 92.4 g block of lead whose temperature is 132 K. find the equilibrium temperature of the two-block system
A baggage cart full of luggage is coasting at a speed vA across the airport taxiway. When forty-one percent of the mass of the cart and luggage is thrown off the cart, Calculate the ratio vB/vA
A 5.00 g bullet is fired into a 500g block of wood suspended as a ballistic pendulum. What was the magnitude of the momentum of the combined mass immediately after the collision
The electron and positron have the same velocity. What is the kinetic energy of the electron
Two 2.00 cm diameter disks spaced 2.239 mm apart from a parallel plate capacitor. The electric field between the disks is 445,140.438 V/m. What was the electron's speed as it left the negative plate
A 0.280 kg ball is dropped from rest at a point 1.35m above the floor. The ball rebounds straight upward to a height of 0.780 m. What are the magnitude and direction of impulse of the net force applied to the ball during the collision with the flo..
An object at rest explodes into three pieces of equal masses. One moves east at 23 m/s, while the second piece moves northwest at 14 m/s. Estimate the velocity of the third piece? Suppose each piece has a mass of 2 kg.
The rotor in a certain electric motor is a flat, rectangular coil with 88 turns of wire and dimensions 2.33 cm by 4.20 cm, What is the average power of the motor
The body contains many small currents caused by the motion of ions in the organs and cells. how large is the current in the heart
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