Which of the following is an example of a complex machine? 1. Pulley
2. Wedge
3. Scissors
4. Incline

In attempt to solve the working problems created by the industrial revolution, the united states and many countries in europe considered and/or adopted

Acceleration is a direct result of a.) balanced forces b.) unbalanced forces c.) gravity d.) velocity

What do isotopes of uranium have the same number of? what do they have a different number of? a) same number of protons; different number of electrons b) same number of protons; different number of neutrons c) same number of electrons; different number of protons d) same number of neutrons; different number of protons