(b) Some non-renewable energy resources are more reliable than others.
Which statement correctly describes a reliable resource?
Tick one box.
It does not burn fuel.
It is predictable.
It will never run out.
It is cheap to use.

What is the final velocity of the initial velocity of 25 and -50?

Suppose you have three polarizing filters, with the second at an angle of 42∘ to the first and the third at an angle of 90∘ to the first. by what perfect will the original intensity of unpolarized light be reduced to after passing through all three filters?

Sawyer is studying diffraction. he draws a diagram of a plane wave to show how light waves travel. which best describes sawyer’s error? the wave fronts should be perpendicular to the direction in which the waves move. the arrow showing the direction of movement of the waves should be pointing to the left. the arrow showing the direction of movement of the waves should be pointing downward. the wave fronts should be both parallel and perpendicular to the direction in which the waves move.