Why can't the efficiency of a heat engine be 100%?

What is electrical power? how to measure power?

These clouds have a fluffy cotton-like appearance but might produce thunderstorms. cumulus stratus silver cirrus

A child is pushing a shopping cart at a speed of 1.5 m/s. How long will it take this child to push the cart down an aisle with a length of 9.3 m?

Two waves collide and the temporary combined wave that results is smaller than the original wave. Which term describes this interaction? A. standing wave formation B. diffraction C. destructive interference D. constructive interference

Callisto, one of Jupiter's moons, has an orbital period of 16.69 days and its distance from Jupiter is 1.88*10^6 km. What is Jupiter's mass?

Rauol's friend Johnny sets out from his house in the city. His displacement is 900 m 80° North of west. What is the x component of his displacement vector?

What is the relationship between gravity and mass? What is the relationship between gravity and distance?

A person performs 300 j of work over the course of 60 seconds how much power they did required

If you have a 90 V power source with a 30-Ω and 60-Ω resistor in series, what is the voltage drop over the 60-Ω resistor? 30 V 2 V 60 V 90 V

How is thermal energy transferred during convection?