Which of these is not a form of matter?

a. air

b. milk

c. rock

d. light

2. An optical fibre is 1200km long and it takes light 0.006s to travel from one end to the other. Calculate the speed of light in glass. 2. An optical fibre is 1200km long and it takes light 0.006s to travel from one end to the other.

Which vector should be negative? Question 1 options: a displacement in the direction North the velocity of a falling object any vector whose magnitude is less than 1 any vector whose magnitude is greater than 1

T/F climate can change quickly

List three sources of information scientists use to learn about ancient climates

What is the momentum of a 0.15 kilgram baseball moving at 20 m/s?

Which of the following describes the products of a chemical reaction? A. The original materials B. The chemicals on the right side of a chemical equation C. The chemicals on the left side of a chemical equation D. The substances that are changed

What does it mean when we say an atom has decayed?

The first excited state of a particular atom in a gas is 5.2 eV above the ground state. A moving electron collides with one of these atoms, and excites the atom to its first excited state.

How do your teeth work as a wedge?

According to the Big Bang theory timeline, all matter and energy was compressed into a very small volume at an extremely high temperature. a. True b. False