A yo-yo is twirled on a 4 meter long string so that its tangential speed is 16 m/s. If the string is only 2 meter long and the revolutions per
second stay constant, what is the new tangential speed?

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

A10 kg box initially at rest is pulled 18 meters across a horizontal, frictionless surface by a 40 n force. what is the block’s final velocity over the 18 meters?

What happens to an isotope during radioactive decay?