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The outside mirror on the passenger side of a car is convex and has a focal length of -8.7 cm. Relative to this mirror, a truck traveling in the rear has an object distance of 12 m. Discover(a) the image distance and (a)the magnification of the mirror.
A 140-W lightbulb connected to a 120-V source experiences a voltage surge that produces 135 V for a moment. By what percentage does its power output increase
A 68.0-kg person throws a 0.0500-kg snowball forward with a ground speed of 27.0 m/s. What are the velocities of the two people after the snowball is exchanged
A silver can of mass 0.233 kg contains 0.030 kg of water. The system is heated electrically. The energy entering the system is calculated to be 207 J. By how much will the temperature (in Kelvin) of the system rise assuming all the heat goes into the..
The earth orbits the sun once a year (3.16 x 10^7 s) in a nearlycircular orbit of radius 1.50 x 10^11 m. With respect to the sun,determine the magnitude of the earth’s centripetalacceleration.
You are standing 1.9m from a 130W- lightbulb. If the pupil of your eye is a circle 5.0mm in diameter, how much energy enters your eye per second
The rms electric field of an electromagnetic wave increases from 307 to 921 N/C. Determine the wave intensities for the two values of the electric field
A duck has a mass of 2.1 kg. As the duck paddles, a force of 0.09 N acts on it in a direction due east, Find the magnitude and direction (relative to due east) of the displacement that the duck undergoes in 2.6 s while the forces are acting
Hagrid thinks he is more powerful than Snape.He performs 1800 J of work in a total of 10 seconds, How much power does each man exert
an object is hanging by a string from the ceiling of an elevator. the elevator is moving upward with a constant speed.
a 1.5kg rock is released from rest at the surface of a calm lake. if the resistance offereed by the water as ther rock
question a 1.03 10-3 microf capacitor has an initial charge of 0.100 c. when a resistor is connected across the
A light commuter rail train usually accelerates at a rate of 2.15 m/s^2 and usually decelerates with a rate of 3.20 m/s^2, The train can stop in 10.5 seconds from its top speed in an emergency. How far would it travel during this braking period
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