The human body contains many examples of levers true or false

How many hydrogen atoms are present in one molecule of an ammonium acetate NH4C2H3O2?

How much heat do you need to raise the temperature of 150g of ice from - 30c to - 15c?

What environmental factor will cause a plant shoot to grow in a direction other than straight up?

Jimmy has two options for moving a piano up to the second floor of a hotel, which is 10 m above his current position. He can push the piano up 50 m ramp or lift the piano up with a rope wrapped around a pulley.

In a hydroelectric power station, how much potential energy is lost by 100tonnes of water flowing down through the pipes, falling a vertical distance of 200metres? [1tonne=1000kg.]

How does the density of the Earth's core compare to the other layers of the Earth? A) The core is the densest layer. B) The core is the least dense layer. C) The core is only less dense than the crust. D) The core is only less dense than the mantle.

Who wins a tug-of-war one who pushes harder at the ground or pulls harder at the rope

Describe an experiment to show that liquids expand and contract at different rates

Which of the following is equivalent to 10 kilograms? a) 1000 grams b) 100 hectogram c) 1 hectogram d) 1000 centigrams

When did einstein publish his theory of relativity