A block requires an applied force of 20N to begin moving it to the right. What is the maximum static friction? a. Less than 20 N
b. Exactly 20 N
c. Just over 20 N
d. Twice as much as the block's weight

The law of conservation of energy states that energy cannot be created or , energy can be from one substance to another. the first blank is ' destroyed ' and for the second blank is ' transferred '

What is the measure of how much matter is in an object and that can be measured using a balance? a. height b. volume c. weight d. mass

An electron moves with a constant horizontal velocity of 3.0 × 106 m/s and no initial vertical velocity as it enters a deflector inside a tv tube. the electron strikes the screen after traveling 26 cm horizontally and 19 cm vertically upward with no horizontal acceleration. what is the constant vertical acceleration provided by the deflector? (the effects of gravity can be ignored.)