John pushes his brother Danny on a skateboard. John applies a force of 39 N

and Danny's acceleration is 0.9 m/s2. What is the combined mass of Danny

and his skateboard?

A. 43 kg

B. 48 kg

C. 31 kg

D. 35 kg

What percentage of the naphthalene molecules emitted a photon?

An empty beaker weighs 39.09 g A) when completely filled with water, the breaker and its contents have a total mass of 388.15 g. what volume does the beaker hold? use d=1.00 g/mL as the density of the water.

Which characteristics is not a characteristic of plastic? A. Easy to mold B. Good conductor of heat C. Lightweight and durable D. Repels water.

What happens acoss the period of the periodic table

A plant release it's seed, but soon there after, the area seeds are in experiences a yearlong drought. How would the seeds most likely respond to this change in the environment?

Sodium will react with oxygen to form sodium oxide. use the formula below to determine how many grams of sodium oxide will be formed if 46 grams of sodium are used in the reaction.

How many atoms in 2.8 mol of neon?

Which best explains why blood and the cytoplasm of cells are mainly composed of liquid water? a. Water is a common substance and is readily available. b. Water is an important transport and reaction medium. c.

Can you describe how mixtures relate to substances?

Read the list of substances. Rubber, Steel, Glass, Iron Which substances are likely to be attracted by a magnet? Steel and Iron Rubber and Iron Steel and Glass Rubber and Glass