A heat engine exhausts 8900 j of heat while performing 2800 j of useful work. part a what is the efficiency of this engine?

A carousel revolves around 9.4 times in 8.5 minutes. What is the frequency of the carousel in hertz?

A car tire has a pressure of 325 kPa when the temperature is 10 C. If the temperature of the tire rises to 50 C and its pressure is constant, what is the new pressure?

A diver named Jacques observes a bubble of air rising from the bottom of a lake (where the absolute pressure is 3.50 atm) to the surface (where the pressure is 1.00 atm). The temperature at the bottom is 4.

When Arti kicks a football, two forces interact. Arti's foot exerts a force on the ball. What exerts a force on Arti's foot?

Which of the following air conditions would be least likely to have precipitation? A. warm, dry air B. warm, moist air C. cold, moist air D. cold, dry air

Kendall has empty graduated cylinder with markings and an identical graduated cylinder partway filled with water. She also has a balance and a marble. Which statement best describes what Kendall can do? A.

2. With regard to the pH scale, a solution with a pH A. higher than 7 is considered an acid. B. lower than 7 is considered basic. C. of 6 is considered neutral. D. close to 14 is considered a strong base.

If a car rolls gently off a vertical cliff, how long does it take to reach 90km/hr.

In the game of volleyball, what skill relates to Newton's second law

The minimum breaking distance d in feet for a typical vehicle can be modeled with the equation d (v) = 0.045v2, where v is the vehicle's speed in miles per hour.