When 100 j are put into a device that puts out 40 j, the efficiency of the device is a. 40%. b. 50%. c. 60%. d. 140%.

In which scenario is the least amount of work done on a crate? a force of 120 n moves it 25 m. a force of 115 n moves it 26 m. a force of 130 n moves it 22 m. a force of 125 n moves it 27 m.

The freezing and boiling point of a substance changes as the air pressure around it changes. for example, at a lower air pressure (higher altitude) it is easier for water molecules to escape from liquid into the air. in a high altitude city such as denver, colorado compared to a sea-level city such as houston, texas, water

An object dropped from cliff falls with a constant acceleration of 10 metre per second square find its speed of two seconds after it was dropped