Which of the following are decomposition reactions?

~There can be more then one answer~

A. K2CO3 (s) → K2O (s) + CO2 (g)

B. 2Na (s) + Cl2 (g) → 2NaCl (s)

C. 2LiOH (s) + CO2 (g) → Li2CO3 (s) + H2O (l)

D. 2SO3 (g) → 2SO2 (g) + O2 (g)

A runner achieves a velocity of 11.1 m/s, 9 sec after he begins. What is his acceleration? Given: Equation: Plug in: Answer:

Define the following terms: Chemical Energy- Stored Chemical Energy- Gravitational Potential Energy- Mechanical Energy-

Suppose you receive $15.00 at the beginning of a week and spend $2.50 each day for lunch. You prepare a graph of the amount you have left at the end of each day for one week Would the slop of this graph be positive, zero, or negative? Why?

What is the best temperature for a refrigerator?

Why are chemicals and hot objects never placed directly on the balance pan?

66. Which of the following is not an example of harmonic motion? A. a ball rolling down a hill B. pistons in a running car engine C. a swinging pendulum D. waves in a pond spreading outward from a stone that was dropped

The metric system and metric conversions are?

Ron bicycles forward with an acceleration of 2.1 m/s2. If he is applying a forward force of 195 N, what is his mass?

Diane swim 5 kilometers against the current in the same amout of time it took her to swim 15 kilometers with the current. The rate of the current was 2 kilometers per hour. How fast would diane swim if there were no current?

A man paddles a canoe in a long, straight section of a river. The canoe moves downstream with constant speed 5 m/s relative to the water. The river has a steady current of 1 m/s relative to the bank. The man's hat falls into the river.