Substance a has a density of 3 g/cm3 and substance b has a density of 4 g/cm3. in order to obtain equal masses of these two substances, what must be the ratio of the volume of a to the volume of b?

Simple machines are designed to increase A) gravity B) friction C) force D) mechanical advantage

Part complete during a collision with a wall, the velocity of a 0.200-kg ball changes from 20.0 m/s toward the wall to 12.0 m/s away from the wall. if the time the ball was in contact with the wall was 60.

Two children playing on a spinning merry-go-round take turns riding and pushing. The merry-go-round slows, stops, and then speeds up again as the children switch places.

A car starts from rest, then accelerates at 1.20 m/s^2 fo 7.00 s. It hits the brakes, slowing to a stop at a rate of - 4.25 m/s^2. What is the total time for the problem? (Unit = s)

Who is not one of the notable psychologists that contributed to our knowledge on learning? Freud Pavlov Skinner Bandura

What are optical fibres

Where in the body does neutral, acidic and basic (alkaline) solutions usually exist?

What is the current in a circuit with a 12.0 V battery and a 4.0 Ω resistor?

Three resistors, R1 = 10 Ω, R2 = 20 Ω and R3 = 30 Ω are connected in series to a 12 V battery. Find: a. The equivalent resistance of the circuit. b. The current in each resistor. c. The voltage across each resistor. d.

What are the basic rules of basketball? Are the rules different for men's versus women's competition?