If there is a North and South Pole on a magnet why don't north and north meat or south and south

When heated, most matter: expands contracts remains the same

Describe how the competition between invasive and native species might affect a food web

If a rocket travels 5600. km in 3.00 hours, what's it's speed?

lipids are stored until they are needed by cells. there are molecules in the cells that break the lipids down and convert them into

A child is sliding down a slide at the playground. Is the mechanical energy conserved? Why or why not? Mechanical energy is always conserved. The mechanical energy isn't conserved. Some energy is lost to gravity. The mechanical energy is conserved.

3. How is electric potential different than electric potential energy?

Ethan pushes a wooden box across a carpet floor then he pushes the same box across a smooth marble floor why does Ethan find it easier to push the box on the marble floor than carpet floor

Let's now apply our equations for the normal modes of open and closed pipes. On a day when the speed of sound is 345 m/s, the fundamental frequency of an open organ pipe is 690 Hz.

Suppose you are an observer standing on the Moon, looking back at Earth. If the moon is in the waxingquarter phase, what phase of the Earth would you see? A. waxing quarter B. full C. new D. waning quarter E. none; the Earth doesn't have phases

How many chromosomes will an elephant's sperm have?