In what two ways can a machine be made to be more efficient?

Which is something that a vacuum tube cannot do? A) change alternating current into direct current B) turn a current on or off C) increase the strength of a signal D) concert electrical energy into thermal energy

The tendency of an object to resist a change in motion is called ___. A. displacement B. momentum C. inertia D. acceleration

Unpolarized light of intensity i0 is incident on three polarizing filters. the axis of the first is vertical, that of the second is 43° from vertical, and that of the third is horizontal. what light intensity emerges from the third filter?

An example of hydro energy is A. burning water. B. a hydrogen farm C. a hydroelectric dam

Find the mass of ether which can be put in to a beaker holding 130 mL

StA A boat takes off from the dock at 2.5 m/s and speeds up at 4.2 m/s2 for 6.0 s. How far has the boat traveled? Round your answer to the nearest whole number.

In Part A, you determined that the heat added to the coffee is what you got. If it takes 4.2 J of energy to raise the temperature of 1.0 mL of coffee by 1.0∘C, then it should take twice as much energy to raise the temperature of 2.

The brightness of a star depends on what three factors?

What is most likely the relationship between Mendel's rules of genetics and Darwin's idea of biological evolution? Mendel's genetics states laws that are now part of the theory of biological evolution.

Why would it be a problem if your household appliances were connected in a series circuit