On October 16, the Moore family received 23 pieces of mail, consisting of ads, magazines, bills, and letters. If they received three more magazines than bills, five more letters than magazines, and the same number of ads as bills, how many ads did they receive?
Answer
3 Keypad

What object a collides with object b and bounces back its final momentum is?

Amachinist turns the power on to a grinding wheel, at rest, at time t = 0 s. the wheel accelerates uniformly for 10 s and reaches the operating angular velocity of 96 rad/s. the wheel is run at that angular velocity for 40 s and then power is shut off. the wheel slows down uniformly at 1.5 rad/s2 until the wheel stops. in this situation, the time interval of deceleration is closest to:

When electrons are added to the outermost shell of a carbon atom, it forms--an anion that has a larger anion that has a smaller cation that has a larger cation that has a smaller radius.