In science, all concepts are

a) opinions and facts.

B) beleifs that are familiar and complicated.

c) testable and observable.

D) theories that cannot be proven.

What is the total resistance of 3 resistors of 3ohms added together in series?

The gravitational force on the moon is. if an astronaut has a mass of 84 kg on earth, what will be his mass when he is standing on the moon? a. 52.5 n b. 84.0 n c. 134.4 n d. 823.2 n

Potassium Permanganate is used for purifying drinking water, because A. it is a sterilising agent B. it dissolves the impurities of water C. it is a reducing agent D. it is an oxidising agent

In a nuclear reactor, neutrons released by nuclear fission must be slowed down before they can trigger additional reactions in other nuclei.

The independent variable or the one that is intentionally manipulated is

An experiment is performed to obtain the value of a physical property. If the true (i. e., correct) value of the property is 50 and the measured (i. e., experimental) value is 32, the percent error of the experimental result is:

White moths were found in huge numbers in the city of Birmingham. These moths could be easily camouflaged by the trees. Because of sudden industrial development, the trees in the city were covered with soot.

What two factors determine how fast weathering occurs

A sound that's produced by a single wave at a constant frequency and with no overtones is called

Which of the following is ignored when determining the relative mass of atoms? protons nucleus electrons. neutrons