What advantages do helicopters have over airplanes?

A vase of flowers is stationary on a table. which of the following statements best explains why the vase is stationary? A. There are no forces on the vase B. There are net forces on the vase C. The force of gravity pulls the vase downwards. D.

The total amount of energy contained in an object.

Which of the following would occur when the number of coils is increased

Match the description to the proper category to differentiate reflection and refraction 1) speed of ray does not change 2) Ray bounces off a boundary 3) Direction found by law of reflection 4) Direction found by Snells Law 5) Speed of ray changes 6)

Of these choices, where would the most reactive nonmetal on the periodic table be located? A.) Group 14, period 2 B.) Group 14, period 5 C.) Group 17, period 2 D.) Group 17, period 5

Why does the moon appear to change shape? A: It rotates and makes it own light B: It moves closer and farther away from the earth in a yearly pattern. C: It reflects sunlight as it revolves around the earth.

An object's weight is equal to its buoyant force in water. What would you expect to happen when the object is placed in water? Explain your reasoning.

What is the name of the german scientist that proposed the theory of continental drift

Trucks 1 and 2 are traveling at the same constant velocity but truck 1's energy due to motion is two times less than that of truck 2. This is because Truck 1's mass is:

Why do the densities of most substances decrease with an increase in temperature?