The half-life is the time it takes for half of the original amount of a substance to decay.

A. True

B. False

A kilometer is a measure of an object's

What is the approximate increase in size from a 1 w to a 2w carbon resistor?

Three ideal polarizing filters are stacked, with the polarizing axis of the second and third filters at 21 degrees and 61 degrees, respectively, to that of the first. If unpolarized light is incident on the stack, the light has intensity 60.

Which best explains how Selena can correct her error? She can change the magnets so like poles are facing each other. She can change the arrows so they show current traveling in opposite directions on the sides of the loop.

Which of the following best describes a longitudinal wave? A. a wave which is caused by regularly repeating disturbance of the medium B. a disturbance that moves the medium along its line of travel c.

A solid spherical insulator has radius r = 2.5 cm, and carries a total positive charge q = 8 * 10-10 c distributed uniformly throughout its volume. find the magnitude of the electric field |e| at a radius of 5 cm from the origin (i. e.

What are some things cyclists do to reduce friction?

What is used to find true north on a compass? a. equator c. magnetic declination b. prime meridian d. cardinal directions

How does the sun's heat affect the humidity of a place

Which "spheres" are interacting when water evaporates from plants