The products of a chemical reaction can never have greater mass than the reactants

true or false

What is the electric force between a glass ball that has 2.5 uc charge and a rubber ball that has a - 1.5 uc charge when they are separated by a distance of 5.0 cm

Most of the earths history occurred during which of these times? A. cenozoic B. Mesozoic C. Paleozoic D. Precambrian

Which is generally easier to accomplish? Prove a hypothesis Disprove a hypothesis

How is the resistor of a 40v lamp higher then the resistor of a 60v lamp?

Frequency and pitch are (blank) proportional. Therefore, as frequency increases, the perceived pitch (blank) by the same factor. (blank) is a physical property and can be independently measured.

How many watt-hours does a 80 watt light bulb use if it runs for 3.5 hours?

A series circuit contains two devices, one with a resistance of 10 ohms and one with a resistance of 4 ohms. If the generator supplies a voltage of 42 V, what is the magnitude of the current? A. 2 A B. 3 A C. 1.75 A D. 1.33 A

What is the relationship between speed and the slopes of the lines on a graph

The basic building blocks of matter are called

A Heavy crate applied a force of 1500 N on a 25m2 piston. What force needs to be applied on a 0.8m2 piston to lift the crate?