How is an electromagnet different from a permanent magnet?

A. It has only north magnetic poles.

B. It has only south magnetic poles.

C. There is no magnetic field.

D. It can be turned on and off.

Healthy bones, teeth, and muscles require the mineral? Carbon Sodium Calcium Cadmium Iron

Second in a series of 3 blood type questions questions. A man with blood type A marries a woman with blood type B. Many years later they both die suddenly, leaving a substantial estate but no will.

What are any difference between organisms of the same species called

How are absorption and transpiration involved in the movement of water through the xylem of a plant?

What is the scientific process able to do?

What is the role of the helicase enzyme in the DNA replication?

How does Keplers third law compare the periods and orbital radii of two planets with a solar system? -the square of the ratio of the periods equals the cube of the ratio of the radii -the square of the ratio of the periods equals the ration of the

What are two harmful effects on aquatic systems resulting from the increase in the human population in coastal areas?

if a slide is being viewed with the high power objective which adjustment knob should be used to sharpen the focus

The process of duplication from pre-existing genes is called