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An object is placed 60 cm in front of a concave mirror with focal length of 12 cm. Where is the image located?
A helicopter has 3 blades, each of them are 5.20m long and has a mass of 220kg.(each blade has a mass of 220kg, not the sum of the 3) The rotor is rotating at 385 rev/min. What is the rotational inertia of the rotor assembly about the axis of rot..
If a 0.20 kg ball falling with a velocity of 3.0 m/s makes a perfectly elastic collision with the floor, how much impulse will the floor place on the ball during the collision
A belt sander, shown in Figure P1.63, weighs 10 lb and has a belt speed of 1000 ft/min. A downward force of 10 lb (in addition to the weight) is applied on the sander. If the coefficient of friction between the belt and a flat table top being sand..
Would you rather live downwind of a nuclear power plant or of a coal-burning power plant? In addition to high-level nuclear wastes, there are intermediate and low-level nuclear wastes. What are some sources of these?
A 7kg squirrel walks to the end of a 15 kg board resting on two saw horses. When the squirrel is at the 1m position away from the right end of board, How long is the board
a gymnast with mass 47.0 kg stands on the end of a uniform balance beam as shown in the figure. the beam is 4.60 m long
A sphere consists of a solid wooden ball of uniform density 800 and radius 0.20 and is covered with a thin coating of lead foil with area density 20.
The Gravitron is an amusement park ride in which riders stand against the inner wall of a large spinning steel cylinder. At some point, What is the maximum rotational speed at which the riders will not slide up the walls of the ride
A square wire loop with 1.5 m sides is perpendicular to a uniform magnetic field, with half the area of the loop in the field. The loop contains an ideal battery with emf = 19 V. find the direction of the net emf in the circuit
A 60 kg suitcase is being pulled along the ground by means of a strap which exerts a force of 20N at an angle of 30 degrees above the horizontal. what is the normal force exerted by the ground
The earth orbits the sun in an approximately circular orbit of radius 1.496 1011 m (about 93 million miles) in a period of 365 1/4 days. Use these data to determine the mass of the sun
how far from a -7.20 ucpoint charge must a2.30 ucpoint charge be placed for the electric potential energy of the pair
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