a 2kg ball rolls down the hill. By the time it is at the bottom, the balls kinetic energy is 25 j. what is its velocity at the bottom of the hill?

The air that we breath is made mostly of which gaseous molecule

You have a resistor and a capacitor of unknown values. first, you charge the capacitor and discharge it through the resistor. by monitoring the capacitor voltage on an oscilloscope, you see that the voltage decays to half its initial value in 2.70 miss . you then use the resistor and capacitor to make a low-pass filter. what is the crossover frequency fc?

Frank just graduated from eighth grade. assuming exactly four years from now he will graduate from high school how many seconds does he have until his high school graduation