A teacher has asked four students to state a scientific theory. Which student is correct?

The size particles in a solution is about 1nm (1nm = 0.000000001 m). Write 0.000000001m in scientific notation.

What are some examples of electric circuits in nature?

What does it mean when sampling is done without replacement

Bill and Bob are carrying loads of trash to the dump. They are walking down the sidewalk, side by side but Bob begins to lag behind Bill. Explain what's happening using one of Newton's Laws of Motion. A) Newton's 2nd Law.

Most substances dissolve A. at a constant rate regardless of heat transfer. B. more quickly as heat is removed from them. C. at the same rate as all other substances. D. more quickly when heat is added to them.

An Australian emu is running due north in a straight line at a speed of 13.0 m/s and slows down to a speed of 10.0 m/s in 3.30 s.

Why do skiers often wear sunglasses while they are skiing

The amount of gravitational force exerted on each other between two objects depends on their A) mass and distance. B) mass and diameter. C) distance and volume. D) distance and location. Eliminate

Why is plasma called the "fourth state of matter"? I've recently heard that plasma is sometimes referred to as the "fourth state of matter". Why is this? Why is it not the first, second or third?

Which of these would you include ina free body diagram for a bicycle-plus-rider taken together as the bicycle is being pedaled up the hill?