Explain how machines can be useful if the output work is always less than the input work

11. Hans and Frans are two workers being considered for a job at the UPS loading dock. Hans boasts that he can lift a 100 kg box 2.0 meters vertically, in 3.0 seconds. Frans counters with his claim of lifting a 200 kg box 5.

Which change increases the electric force between objects? A) Two neutral objects are moved closer together. B) Electrons are added to two negatively charged objects. C) Two oppositely charged objects are moved farther apart.

The hight A note on the piano has a wavelength of 0.0487 m what's the frequency?

Gasoline and propane fumes are most likely to accumulate in what part of the boat

A steep slope on the graph indicates

A 500-kilogram sports car accelerates uni- formly from rest, reaching a speed of 30 me- ters per second in 6 seconds. What distance has the car traveled during the 6 seconds?

What is efficiencywhat is the formula of mechanical advantage and velocity ratio of labour

What is the wavelength of an ekectromagnetic wave that has a frequency of 40,000 hz? the speed of light is 3x10^8 m/s?

Witch of the following is an example of a pull

Can two like charges attract each other