"A bicycle's brakes apply 299 N of frictional force to the wheels as the bike moves 24 m for 3.0 s. How much WORK do the brakes do?"

0.62 N

Explanation:

first of all: 3.0 s = 0.05 m

Let ? be the work that brakes do at 3.0s

24 m > 299 N

0.05 m >?

? = (0.05 m x 299 N)/ 24

? = (14.95)/ 24

? = 0.622 N

- False.

Explanations:- One mole of any gas at STP occupies 1 volume of 22.4 L.

STP means standard temperature and pressure. Standard temperature is 273 K and standard pressure is 1 atm.

Here, in the statement the given temperature is 298 K which is not the standard temperature and so the volume of 1 mole of the gas will not be 22.4 L.

The volume could be calculated using ideal gas equation:

PV = nRT

R is the universal gas constant and it's value is .

let's plug in the values and calculate the volume for 1 mole of the gas:

V = 24.5 L

The volume for 1 mol of the gas at 298 K and 1 atm is 24.5 L and hence the statement is false.