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

A person opens a door by applying a 10-N force perpendicular to it at a distance 0.90m from the hinges.

A person walks 70 m due east, turns around and walks 70 m due west. Determine the total distance, in m, this person has traveled. a) 0 b) 70 c) 140 d) 210

An ambitious hiker walks 25 km west and then 35 km south in a day. find the magnitude and direction of the hikers resultant displacement (relative to due west).

Two enery converrsation that take place when you warm a cup of cocoa in a microwave Oven

Explain why different materials have different thresholds to change states matter

If your at the mall with your friends and they shoplift what would you do

Fluid is leaking from an axle seal. Technician A says to remove the wheel and check for incorrectly installed brake components. Technician B says to check for obstructions at the differential breather.

All matter we encounter in everyday life exists in one of three physical formss True or False.

15 grams of liquid plastic are frozen in a physical change that increases the volume. What can be known about the plastic after the change?

A Car is lifted a certain distance in a service station and therefore has potential energy relative to the floor. if it was lifted twice as high, how much potential energy would it have?