Straw polls are___. A. scientifically based B. representative samples C. biased sampling D. cluster samples

Rolf is comparing four solutions. solution a was placed in the fridge, which is at 4° c. solution b was placed at room temperature, which is 20° c. solution c was placed in an incubator at 37°c, and solution d was boiled at 100° c.

0.00000231 in scientific notation is

Which statement is true about the force of gravity? The moon has a greater gravitational effect that the sun. A.) The sun has a greater gravitational effect than the earth. B.) The earth has a greater gravitational effect than the sun. C.

The difference between cathode and an anode involves

You are working out on a rowing machine. Each time you pull the rowing bar (which simulates the "oars") toward you, it moves a distance of 1.0 m in a time of 1.7 s.

A 2.50 * 105 W motor is used for 26.4 s to pull a boat straight toward shore. How far does the boat move toward shore if a force of 4.20 * 104 N is applied by the motor?

Which type of wave experiences a change in speed when entering a new medium? a) only sound waves b) both sound and light waves c) only light waves d) neither sound or light waves

Three basic classes of collisions include all but which of the following?

How does the use of biomass energy to create electricity harm the environment

Which physical property of iron made it popular for use in weapons? 1. Magnetism 2. Luster 3. Malleability 4. Ductility