In absence of air resistance, a ball of mass m is tossed upward to reach a height of 20.0 m. At the 10.0 m mark, the net force on the ball is:.

Which statement correctly describes the current in a circuit that is made up of any two resistors connected in parallel with a battery? a. the current in the battery and in each resistor is the same b. the current the battery equals to the sum of the currents in the resistors c. the current in the battery is less than the current in either resistor d. the current in the battery equals to the product of the currents in the resistors

Which of the following examples illustrates static friction? a box sits stationary on a ramp. a ball rolling on the lawn eventually comes to rest. a car rounds a curve on a road. a fish swims upstream.

The smallest particle of an element that retains its identity in a chemical reaction. true or false