Aristotle believed that everything on Earth is made of one of only 4 types of material: earth, air, water, or fire.

True

False

6. DRAW 3 3/8° LINE 7. DRAW A 5 * LINE

Which statement is true according to the kinetic theory? A. Only gases show random motion of particles. OB. Only gases and liquids show random motion of particles. C. Solids have a fixed shape, so they do not show random motion of particles. D.

Hydrogen can be created by water. If the activation energy is reduced, hydrogen can be produced with a renewable energy source. This renewable energy source is.

True or False: The more mass an object has, the faster it will fall.

What do scientists mean by the word Theory? A. An uncertain idea. B. An obsolete idea C. An idea which allows you to try to predict future events D. An idea which cannot be checked. so although it may sound convincing, we need to keep an open mind

A battleship simultaneously fires two shells toward two identical enemy ships. One shell hits ship A, which is close by, and the other hits ship B, which is farther away. The two shells are fired at the same speed.

A horse canters away from its trainer in a straight line, moving 37 m away in 9.1 s. It then turns abruptly and gallops halfway back in 1.8 s. Calculate its average speed for the entire trip. Express your answer using two significant figures.

An early submersible craft for deep-sea exploration was raised and lowered by a cable from a ship. When the craft was stationary, the tension in the cable was 7000 N {/rm N}.

What are the components of earths life support system

A car is moving with a velocity (3.0 m/s) € x ˆ + (1.0 m/s) € y ˆ and 3.0 seconds later its velocity is (6.0 m/s) € x ˆ - (3.0 m/s) € y ˆ. What is the direction of the average acceleration of the car?