if it took 60 seconds to get to the car, what was the velocity of harry while carrying the groceries?

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?

What are the similarities & differences between a thermistor and a light dependent resistor in physics?

Is the portion of the electromagnetic spectrum that has a frequency just above that of visible light.