Which of the following refers to the change in wavelength that occurs when an object moves toward or away from a source?

A) Doppler effect

B) Chromatic aberration

C) Spectroscopy

D) Wave theory of light

Why does a person's mass stay the same when he travels to the moon, but his weight changes? Give a detailed answer that includes scientific terms.

How many joules are required to heat. 250 kg of liquid water from 0 °C to 100 °C?

The substance that has gets broken down in a homogeneous mixture is the? 1. colloid 2. solution 3. solvent 4. solute

Explain why the phrase "by ordinary means" was added to the Law of Conservation of Energy

As scientists research, they often find information that does not fit with current theories. What happens when new, contradictory information is found? a. new information is ignored b. old theories are completely discarded Eliminate c.

A 26-g steel-jacketed bullet is fired with a velocity of 630 m/s toward a steel plate and ricochets along path CD with a velocity 500 m/s.

A small boat is carrying four people across a river. Without any paddling, the boat moves downstream at a steady speed of 5 m/s. If the average weight of the four people is 60 kg, then what is the speed of the boat after one person gets?

Does temperature affect the dissolving phase?

In a clear, coherent, paragraph-length answer, explain why the speed of the apple half way between the release and the maximum height is not half the initial speed.

In pea plants Round (R) is a dominant trait and wrinkled nose (r) is a recessive trait. Which combination would result in wrinkled seeds? 1. RR 2. Rr 3. rr 4. ww