Two spaceships leave the earth in opposite directions, each with a speed of one-half the speed of light with respect to the earth. (a) what is the velocity of spaceship 1 relative to spaceship 2? (b) what is the velocity of spaceship 2 relative to spaceship 1?

What is the average speed of a car that travels 40 mph for 1 hour and 60 mph in another hour?

Aprisoner is forced to go into one of three rooms, but he can choose which room. the first room is ablaze with fire. the second one is rigged with explosives that will go off as soon as he enters. the third contains a pair of lions who haven't eaten in years. which room should he choose to survive?

A2.50 × 105 w motor is used for 26.4 s to pull a boat straight toward shore. how far does the boat move toward shore if a force of 4.20 × 104 n is applied by the motor?