Glenn is heating water in a teakettle. The hotter water at the bottom of the kettle rises. The cooler water near the top sinks and warms. Which kind of transfer of heat is this?

A. conduction

B. convection

c. radiation

d. transmission

A kicker punts a football from the very center of the field to the sideline 39 yards downfield. What is the magnitude of the net displacement of the ball?

Explain how a charged amber rod can lift tiny bits of paper despite being under the gravitational force of the entire mass of the earth.

A nitrogen atom has 7 electrons. to what level are it's electrons found

Is the following sentence true or false? Two atoms of the same element can have different numbers of protons.

What did Mendel discover about genetic factors in pea plants

How are magnetic poles and electrical charges similar? A. Their same forces repel each other, and their opposite forces attract each other. B. Their same forces attract each other, and their opposite forces repel each other. C.

As part of his meal, a workman has a cup containing a hot drink. In order to keep the drink hot whilst he eats the rest of his meal, he covers the cup, as shown in the figure. Which sources of energy loss does this action reduce? Tick two boxes.

When energy is transformed, the amount of usable energy?

If an object weighs 39.2 n on earth, what is its mass

What happens when pressure is applied to a solid.