A small engine is rated at 4.0 horsepower (1 hp = 746 W). How much mechanical energy can the engine produce in 50 s? Group of answer choices

3000 J

1.5×10^5 J

0.080 J

200 J

13 J

A1200 kg car traveling north at 10 m/s is rear-ended by a 2000 kg truck traveling at 30 m/s. what is the total momentum before and after the collision?

Heena wants to measure the volume of a ball that is 24 cm across. how should she set up her equation?

Unpolarized light falls on two polarizer sheets whose transmission axes are at right angles. a third polarizer is placed between the first two so that its axis makes a 52-degree angle with the axis of the first polarizer. a) what fraction of the incident light intensity is transmitted through the first polaroid? b) what fraction of the incident light intensity is transmitted through the second polaroid? c) what is the angle of polarization of the light that enters the third polaroid? d) what fraction of the incident light intensity is transmitted through the third polaroid. e) what happens if the middle polaroid is removed?