Alice added sodium chloride to water and stirred the water for several minutes. Alice is most likely trying to demonstrate that ionic compounds

a. are hard.

b. can dissolve.

c. are clear.

d. can melt.

If an object is said to be moving at 10 m/s due north. The measurement 10 m/s north would be best described as A) a speed. B) a velocity. C) neither a speed or velocity D) either a speed or a velocity.

Find the electric field inside a hollow plastic ball of radius r that has charge q uniformly distributed on its outer surface. Give your answer as a multiple of q/ε0.

Boyle's Law states that when a sample of gas is compressed at a constant temperature, the product of the pressure and the volume remains constant: PV = C. (a) Find the rate of change of volume with respect to pressure.

Thin films of soap sometime display an array of colours. this display is the result of: a) reflection, diffraction, and interference b) reflection, refraction, and interference c) reflection, refraction, and polarization d) refraction, interference,

1. A tennis ball is dropped from a second story window. It is in free fall, accelerating downward at a rate of 9.8 m/s2. At the exact same time, another person throws a tennis ball out the adjacent window with a horizontal velocity of 30 m/s.

What is the purpose of using a wedge? A. separates objects B. keeps objects together C. allows you to exert force over a distance

Echolocation is an acoustic principle in which some wildlife use resonance to find food at night. Question 25 options: True False

Use the drop-down menus to identify the variables for the second hypothesis. Hypothesis #2: As you build circuits, you will alter resistance, which is the y variable.

A tortoise travel 15 meters west, then another 13 centimeters west. How many total has the tortoise walked?

How does genetic drift affect small populations differently than large populations?