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An object 15cm high is placed 15cm in front of a convex mirror of focal length -10cm. What is the image height? 6cm is the answer. Im not sure what equation to use.
A brass rod with a length of 10.0 cm is placed end to end with an aluminum rod with a length of 30.0 cm, What is the heat flow from the hot temperature to the cold temperature
A ball of mass 0.120 kg is dropped from rest from a height of1.25 m. What impulse was given to theball by the floor
What is mass of the block of ice
Two objects (38.0 and 18.0 kilogram) are connected by a mass less string that passes over a mass less, frictionless pulley. Evaluate the acceleration of the objects
Calculate the kinetic energy a proton gains if it is accelerated, throug a potential difference of 1.00 V
An electric field of 254,000 N/C points due west at the certain spot. What are the magnitude and direction of the force that acts on the charge of -8.1 µC at this spot.
A rotating flywheel can be used to store energy. If it is required to store 1.00 x 10^6 Joule of energy when rotating at 400 rad/s, Obtain what is the moment of inertial of the wheel
Two lenses are mounted in a tube such that the distance between them can be varied. What is the magnification achieved
suppose that an insulating container of negligible mass contains 0.55 kg of water at a temperature of 64 degrees c. now
Consider a spacecraft in an elliptical orbit around the earth. At the low point, or perigee, of its orbit, it is 300km above the earth's surface; at the high point, or apogee, it is 2500km above the earth's surface. What if the rockets were fired ..
In a head-on collision, a car stops in 0.27s from a speed of 24m/s}. What force is applied to the driver by his seat belt during that fraction of a second
An engine absorbs 1702 J from a hot reservoir and expels 1198 J to a cold reservoir in each cycle. What is the engine's efficiency? How much work is done in each cycle?
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