1. Johan started attending swimming lessons. On the first day, he

suffered from pain on his body as he had used a wrong technique to

jump into the water. Explain the reason for Johan's

injury. (Relate to water surface tension).

What happens when an electron absorbs energy? A. The electron moves from a lower energy orbital to a higher energy orbital. B. The electron falls into the nucleus. O C. The electron moves from a higher energy orbital to a lower energy orbital. O D.

Suppose you are testing the buoyancy of different objects. Study the table and choose the object with the greatest buoyant force. Object Amount of Water Displaced by the Object (in ml) 1 5.4 2 6.7 3 7.8

What is the molarity of a stock solution if 60 mL were used to make 150 mL of a. 5M solution

Do we generally break chemical bonds when we cool molecules?

6. What is the relatonship between wavelength and frequency

58.5 million excess electrons are inside a closed surface. What is the net electric flux through the surface?.

Nitrogen monoxide and oxygen, both colorless gases, form a red-brown gas when mixed. Nitrogen monoxide and oxygen are called the

What quantity of heat is needed to raise the temperature of 5.0g of a substance from 20 c to 30 c if the specific heat?

Compare mechanical energy and thermal energy.

How many covalent bonds can each carbon atom form?