What happens when more than one variable changes during a scientific experiment?

How does organisms get the energy needed

Use this formula to solve this problem: Power (P) = Work (W) : time (t) Joachim's body supplies a force of 450 N to run up a 20 meter hill in 15 seconds. How much power is involved in Joachim's run up the hill? A. 22.5 Watts B. 30 Watts C.

During which change of state do particles in a material usually become father apart?

What subatomic particles are found in the space surrounding an atoms nucleus. A. electrons B. ions and protons C. neutrons and electrons D. protons and neutrons

For each solution below calculate the millimoles of solute. a. 1.90 l of 0.00657 m nacn b. 871 ml of a solution containing 8.49 ppm caco3

Calculate the pH of a solution in which [H3O+]=9.5*10-9M. Express the pH of the solution to two decimal places.

1. The simulation shows a quantity of oxygen molecules. What state of matter is this?

Whereas asteroids are compromised primarily of (Blank), comets are compromised primarily of. A. Rocky material; icy material B. permafrost; molten rock C. icy material; rocky material D. Dark cloud; planetary fragmetns

The term for the "family" of organic compounds that is soluble in organic solvents but not in water is:

4. Which hypothesis led to the discovery of the proton? A. Cathode rays should be attracted to a positively-charged plate. B. The nucleus of an atom should contain neutrons. C.