A weightlifter lifts a 1000 newton barbell above his head from the floor to a height of 2.5 meters. he holds the barbell there for 5 seconds. how much work does he do during the 5 second interval?

Uranus is unique among the planets in that it A. orbits the Sun on its side B. has an oxygen atmosphere C. has rings

When two lenses of focal length 10 centimetre and - 5 CM placed in contact then find the net power

Sunlight water, wind, nuclear power, biomass fuels, geothermal energy, and hydrogen are all nonrenewable energy sources true or false

If the macaronis mass is 200 grams, and the volume is 348cm cubed, what is the density

A drag racer completes a race in 14.3 s. If the drag racer has an average speed of 251 km/h, how long is the racetrack?

The train traveled 500 kilometers north to Odessa in 2 hours. What's the train's speed? What is the velocity?

Are microwaves and radio waves faster or slower than other types of electromagnetic energy?

If you dive under-water, you notice an uncomfortable pressure on your eardrums due to the increased pressure. The human eardrum has an area of about 70 mm2 (7*10-5m2), and it can sustain a force of about 7 N without rupturing.

Why cant kinetic energy ever be greater than potential energy

For a stationary observer, when the source of a sound is moving, its pitch appears to change.