Find the size of the image
A converging lens has a focal length of f = 23 cm. An object is placed 36 cm from the lens. Find the size of the image in cm if the object has a height of 7 cm. Express the answer with one decimal place.
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A 10.0 g bullet is fired horizontally into a 104 g wooden block that is initially at rest on a frictionless horizontal surface and connected to a spring having spring constant 157 N/m.
How might technology be used in the future to help prison administrators and staff, as well as inmates? What types of technology are being used in corrections efforts now, and how?
A brick is thrown upward from the top of a building at an angle of 40° to the horizontal and with an initial speed of 10 m/s. If the brick is in flight for 2.8 s, how tall is the building?
What can you affirm about the cannonball's velocity at that instant of time as compared to its initial velocity (at launch)? vx and vy stand for the x and y components of the cannonball's velocity.
A parachutist bails out and freely falls 66 m. Then the parachute opens, and thereafter she decelerates at 2.2 m/s2. She reaches the ground with a speed of 2.8 m/s. (a) How long is the parachutist in the air? (b) At what height does the fall begin
Find the power of the starlight the Earth intercepts. One light-year is the distance traveled by the light through a vacuum in one year.
A cosmic-ray proton in interstellar space has an energy of 17.0 MeV and executes a circular orbit having a radius equal to that of Jupiter's orbit around the Sun (7.78 1011 m). What is the magnetic field in that region of space?
A 220-kg wooden raft floats on a lake. When a 75-kg man stands on the raft, it sinks 4.0 cm deeper into the water. When he steps off, the raft vibrates for a while. (a) What is the frequency of vibration? (b) What is the total energy of vibration
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