You run 3 km in 15 mins. What is your speed?

What is the approximate ratio of the Sun's mass to the combined masses of all the planets?

A light wave travels at a speed of 3.0 * 108 meters/second. If the wavelength is 7.0 * 10-7 meters, what is the frequency of the wave?

How are the land area and the oceans affected during an ice age

Scientists test their ideas by A. Publishing in scientific journals B. Performing experiments C. Developing theories D. None of the above

A system of pulleys is used to raise a load of bricks that weighs 1,700 newtons. The force applied to the pulley is 340 newtons. What's the mechanical advantage of this machine?

How many earth years does it take mars to orbit the sun

Which represents a system that is almost completely closed?

If many household substances classify as acids or bases what is the ph scale

A protostar forms once the nebular cloud condenses and the core begins

How do whales bats and dolphins use echolocation? A To scare away predators B To attract mates C To orient them selves and find food D To tell animals of there species where they are