A rock weighs 30 n on earth and another rock weighs 30 n on the moon. which rock has the greater mass?

Why are meteorites of primitive material considered more important than other meteorites? Why have most of them been found in Antarctica?

A force of 50 lbs is applied to a 1-foot diameter wheel. the wheel is turning a. 25" diameter axle. how much mechanical advantage does the wheel provide?

Calculate the force at sea level that a boy of mass 50 kg exerts on a chair in which he is sitting.

A planet orbits a star, in a year of length 2.35 x 107 s, in a nearly circular orbit of radius 3.49 x 1011 m.

Hour, a bicyclist travels 10 km north and then 6 km south. What is the average In 1 hour, a bid che bicyclist? uth. What is the average velocity of A 4 km/h B. 4 km/h north C. 16 km/h D. 16 km/h north

What's another name for pure substance

How could you demonstrate that visible white light is composed of many different colours?

1500 Joules of work are done lifting a 500 N weight. How high was the weight raised as a result of this work?

A pelican flies at a speed of 52 km/h for 0.25 hours. how many miles does the pelican travel?

When must batteries in an emergency locator transmitter (ELT) be replaced or recharged, if re-chargeable?