A car's engine applies a force of 2400 [N]. During this time, the car accelerates at 2.0 [m/s2). What is the mass of the car?

Awoman stands a distance d from a loud motor that emits sound uniformly in all directions. the sound intensity at her position is an uncomfortable 2.0×10-3 w/m2. at a distance 2.6 times as far from the motor, what are (a) the sound intensity and (b) the sound intensity level relative to the threshold of hearing?

Acid precipitation chemically weathering a 5.0-kg limestone rock . which coukd be the result ?

Using a caesar cypher with an offset of three characters (a -> d, b -> e, z -> c), what would be the correct cypher text for the plain text "attack at dawn"?