A porter carries 30 bricks to a distance of 50 m in 25 s. If the weight of one brick is 12N, calculate the work done and power. [Ans: 18000J, 720W)
PHYSICS
Oasis School Science and Environment - 8
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Oxygen and hydrogen gas are at the same temperature t.what is the ratio of kinetic energies of oxygen molecule and hydrogen molecule if oxygen is 16 times heavier than hydrogen.

The coefficient of friction is a number that represents the resistance to sliding between two in contact with one another.

Although longitudinal waves can travel through all media types what is the disadvantage of this type of wave transmission? a) he efficiency of he wave transmission is greatly diminished as the media becomes less dense b) the oscillation of one set of particles has a huge impact on neighboring particles c) particles become too close together as they bump into each other making it more likely to hit other particles down the line