Which of the following is a disadvantage of a controlled experiment

A. It is a repeat.

B. The results are more valid.

C. It does not replicate real world conditions.

D. The effect of the variable is apparent

Which characteristics describe a spiral galaxy? Check all that apply. is shaped like a pinwheel has no new star formation contains a lot of gas and dust is smaller than other types of galaxies has sites of active star formation within its arms

Which of the following is not accurate when describing liquids

Real world trampolines lose energy since they are damped springs with much internal friction. How much energy does the sumo wrestler lose on each bounce in this situation? b) How can a gymnast keep a constant bounce height in a real world trampoline?

How can you differentiate between a homogeneous mixture (solution) and a heterogeneous mixture?

You are playing a game called "Will It Float?" In this game, you are given a large, square can of tuna. If you know the density of water, what is the minimal information you need to decide if the tuna will float in the water?

A woman tries to put lipstick in the car. She has to come to a fast stop, and the lipstick falls to the floor and rolls forward, under the brake pedal. She dies. Why does this happen?

The slope of the line on any speed vs time graph is equal to the objects?

True or False? a globular cluster is a group of older stars that are clustered together.

The doppler effect is the change in observed frequency due to

Which of the following is NOT a vector quantity? (A) Acceleration (B) Average velocity (C) Linear momentum (D) Potential energy (E) Force