Which of the following is an example of a chemical change?

Boiling water

Burning paper

Dissolving sugar in water

Melting gold

Which pieces of information would be least useful in determining if a science article is credible? A. the date that the article was published B. the type of organization that published the article C. the age of the author D.

What does the equation n = Pout/Pin mean

Which of the following statements is true? Question 8 options: You are exposed to nuclear radiation every day. All natural radiation is at a level low enough to be safe. Naturally occurring nuclear radiation is called background decay.

A cyclist is traveling at a constant velocity of 5.00 m/s.

The table below shows the difference between the average temperatures in April and October in four locations. Location/Difference between the average temperatures in April and October (in degrees Celsius) A / 4.5 B / 1.7 C / 6.8 D / 4.

Lead-202 has a half-life of 53,000 years. How long will it take for 15/16 of a sample of lead-202 to decay? A) 106,000 years B) 159,000 years C) 212,000 years D) 265,000 years

A trained attack octopus can crawl at a velocity of 0.3m/s. If the octopus crawls towards its victim for 30 seconds, what is the change in position (or distance) that the octopus crawled?

Which profession is responsible for a planes design? A) Aerospace engineering B) Aerospace mechanic C) Pilot D) Flight attendant

Distracted driving laws have been put in place due to scientific studies that have shown the dangers associated with wireless technology. DDT. plastics. vaccines.

An electric circuit consists of a variable resistor connected to a source of constant potential difference. If the resistance of the resistor is doubled, the current through the resistor is (1) halved (3) quartered (2) doubled (4) quadrupled