an 80kg skateboard moving at 3m/s pushes off with her back foot to move faster. If her velocity increases to 5 m/s, what is her change in kinetic energy as a result

Which of the following is a true statement? A. You can live longer without water rather than without food B. Proteins are your body's main source of energy C. Sports drinks have two very important ingredients - electrolytes and carbohydrates D.

Which statement describes thylakoids? Glucose is formed here. Water molecules are formed here. Only photosystem II functions here. Photosystems I and II function here.

What is the total number of electrons in the valence shell of an atom of aluminum in the ground state? (1) 8 (3) 3 (2) 2 (4) 10

A bowl of trail mix an da bowl of soup are examples of what type of matter?

The density of carbon tetracoride is 1.58 g/mL. What is the mass of 95.7 mL of carbon tetrachloride?

Why is Sn (SO4) 2 named Tin (IV) Sulfate and not Tin (II) Sulfate?

An element x forms an iodide (xi3) and a chloride (xcl3). the iodide is quantitatively converted to the chloride when it is heated in a stream of chlorine: 2xi3+3cl2â2xcl3+3i2 if 0.5500 g of xi3 is treated, 0.2596 g of xcl3 is obtained.

When you kick a soccer ball across a field it will eventually come to a stop. Does this prove or disprove Newton's first law of motion? It disproves Newton's first law of motion because gravity is stronger than friction.

Particle model to predict what will happen if a sharp object creates a hole in the soccer ball

If a new substance is formed in a chemical reaction, what atoms do they consist of?