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If a lens with focal length 10 cm is placed 30 cm from an image 3 cm tall, and a cecond lens with focal length -15 cm is placed 36 cm from the image.
a) what kind of image (real or virtual),
b) where, and
c) how tall is the resulting image?
Old naval ships fired 10kg cannon balls from a 250 kg cannon. It was very important to stop the recoil of the cannon, as otherwise the heavy cannon would go careening across the deck of the ship.
A spacecraft of 140 kg mass is in a circular orbit about the Earth at a height h = 3RE. What is the spacecraft's kinetic energy
Two 10-cm-diameter charged rings face each other, 18.0cm apart. Both rings are charged to + 50.0nC . What is the electric field strength at the center of the left ring
A 1200kg automobile travels at 90km/h. What is its kinetic energy? What net work would be required to bring it to a stop
The magnetic field over a certain range is given by B= Bxi + Byj where Bx= 6T and By= 4T. What is the j component of the force
You are practicing throwing darts in your dorm. You stand 2.89 m from the wall on which the board hangs. Calculate the speed of the dart when it hits the board
A disk with a rotational inertia of 5.6 kg?m2 and a radius of 0.53 m rotates on a frictionless fixed axis perpendicular to the disk, The angular acceleration of the disk in rad/s2 is:
As soon as a traffic light turns green, a car speeds up from rest to 59.0 mi/h with constant acceleration 7.00 mi/h/s. For what time interval is the bicycle ahead of the car
A 2.05 g ping-pong ball rubbed against a wool jacket acquires a net positive charge of 1.26 ?C. How many electrons were removed from the ping-pong ball
A flight attendant pulls her 71 N flight bag a distance of 322 m along a level airport floor at a constant velocity. The force she exerts is 36 N at an angle of 53° above the horizontal.
1ml of distilled water is injected into a length of 3mm diametre tubing and sealed at the other end by folding over, Why doesn't water drain out when the tube is hung vertically
Motor M draws in the cable with an acceleration of 4 ft/s^2, measured relative to the 200 lb mine car. Determine the acceleration of the car and the tension in the cable. avoid the mass of the pulleys.
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