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A pumpkin sets in front of a mirror with radius of curvature of -20 cm. The image of the pumpkin is 1/3 as high as the actual pumpkin. How far away is the pumpkin from the mirror?
A faulty model rocket moves in the xy-plane (the positive y-direction is vertically upward), Calculate the velocity vector as a function of time
Some skin divers go as deep as 50 m. What is the gage pressure at this depth in fresh water, and what is the ratio of absolute pressure at this depth to normal atmospheric pressure.
A loaded ore car has a mass of 950 kg and rolls on rails with negligible friction. It starts from rest and is pulled up a mine shaft by a cable connected to a winch, What maximum power must the motor provide
An RL circuit consists of a switch, an emf source Eo, a 4 kΩ resistor, and a 5 H inductor. If the potential across resistor is 16 V 5 ms after switch is closed, find out the source emf, Eo.
A ping-pong ball of mass 4 gm and traveling with a velocity of 4 m/s collides with stationary tennis ball of mass 5 gm. Calculate the magnitude of the velocity of the tennis ball after the collision
A spring has a force constant of 931N/m and an unstretched length of 8 cm. One end is attached to a post that is free to rotate in the center of a smooth table.
compute the tension in a string that whirls a 2kg toy in a horizontal circle of radius 2.5m when it moves at 3m/s
How much work does the electric field do in moving a -7.7 microCoulomb charge from ground to a point whose potential is +positive 55V higher.
compute the accelerations experienced by the blood.
A person holds a rifle horizontally and fires at a target. The bullet has a muzzle speed of 200m/s, The air temp is 72 degrees Fahrenheit. What is the distance to the target
A small metal particle passes downward through a fluid medium while being subjected to the attraction of a magnetic field such that its position is observed to be s = (15t3 - 3t) mm, where t is measured in seconds. Determine (a) the particle's dis..
What is the size of the frictional force acting on the car
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