If an object has a mass of 40 grams and a volume of 20 cm^3, what is its density in g/cm^3?

A) 0.5

B) 2

C) 40

D) 800

Why did the temperature remain at 0 and at 100 for a few minutes

An student in a swimming pool weighs 450 N and in a regular balance out of the swimming pool weighs 700 N. What is the value of the buoyant force?

How many helium-filled balloons would it take to lift a person? Assume the person has a mass of 80kg and that each helium-filled balloon is spherical with a diameter of 33 cm.?

An electric model train travels at 31.50 cm/s around a circular track of radius 1.670 m. how many revolutions does it perform in one second

Why is the position vs. time graph for an object in free fall a curve?

Which of the following statement is true regarding the study of human development?

Which type of power plant uses energy directly from the sun to generate electricity? A. Wind B. Hydroelectric C. Radiant D. Coal

What is a scientific law? an explanation that clarifies scientific observations a hypothesis that proposes an answer to a question a statement that summarizes a pattern found in nature an observation that explains a hypothesis

If the frequency of an electromagnetic wave is increased, what happens to the energy?

Under what circumstances will a binary star produce a nova?