What happens when hot air meets cold air

Which statement is true? A) The work done to lift an object 6 meters is greater than the gravitational potential energy it gains. B) The work required to push an object is less than the work required to pull an object the same distance.

Differentiate between fundamental quantity and derived quantity

Compare a wedge and a screw with an inclined plane

An iron anchor of density 7890.00 kg/m3 appears 299 N lighter in water than in air. (a) What is the volume of the anchor? (b) How much does it weigh in air?

Any material from Which energy can be obtain is called a ___ A - biomass B - hydrocarbon C - fuel D - generator

Is cell using oxygen to break down sugar a physical or chemical change

Which is a branch of Earth science? physics ecology chemistry geology

A 6,600 kg train car moving at + 2.0 m/s bumps into and locks together with one of mass 5,400 kg moving at - 3.0 m/s. What is their final velocity? A.) - 1.0 m/s B.) + 2.5 m/s C.) - 0.25 m/s D.) + 0.50 m/s

Why does matter absorb sound energy?

What is the speed of a wave if the wave length is 100 m and the period is 20 s? A. 80 m/s B. 120 m/s C. 2,000 m/s D. 5 m/s