Why is the warm air rising while the cold air is sinking

Why is heat transfer by conduction limited to the area very near earth's surface?

Humans start from a single cell. Eventually, as cells divide, they start to differentiate, or specialize. Some cells are specialized for movement of the human body. What type cells would these be?

An alarm clock has a current of 4.5 amps and a resistance of 3.2 ohms. What is the voltage in the circuit?

Which group 2A element has the largest ionic radius? magnesium calcium barium radium

The continuous flow of charges through a material is called electric resistance. true or false

Two football players collide on the field. Before the collision, their total momentum was 450 kgm/s to the north. What is their total momentum after the collision? A. More than 450 kgm/s north B. 450 kgm/s north C. Less than 450 kgm/s north D.

Jane and John Doppler effect

If you combine 430.0 ml of water at 25.00 °c and 140.0 ml of water at 95.00 °c, what is the final temperature of the mixture? use 1.00 g/ml as the density of water. s

While working out, a man performed 200 j of work in 3 seconds. What was his power?

A funnel-shaped low pressure closure