A certain heat engine extracts 1.30 kJ of heat from a hot temperature reservoir and discharges 0.70 kJ of heat to a cold temperature reservoir. What is the efficiency of this engine?

An airplane travels at a speed of 90 m/s for 30 minutes. how far does it travel?

As the crew chief, which option is the best way to get the car off the track for repairs: applying a balanced force or applying an unbalanced force? Choose one. A: balanced force B: unbalanced force

The bright light emission spectrums below are seen through a spectroscope. The unknown sample is a mixture of the observed gases. 5 rectangles labeled gas W, gas X, gas Y, gas Z and unknown sample.

You throw a 5.5 g coin straight down at 4.0 m/s from a 25-m-high bridge. A) How much work does gravity do as the coin falls to the water below? B) What is the speed of the coin just as it hits the water?

What organic materials make up limestone? What type of mineral and what percent of it determine if a rock is limestone?

If a bicyclist has a mass of 70 KG and a velocity of 25M/S, what is the momentum of the bicyclist?

How much force is required to pull a spring 3.0 cm from its equilibrium position if the spring constant is 3.7 x 103 n/m?

When did our Solar System begin to form? When did our Solar System begin to form? 5 million years ago 5000 years ago 5 trillion years ago 5 billion years ago

Which describes how radiation moves? radiation moves from a cooler object to a warmer object radiation moves from a warmer object to a cooler object radiation moves from a warm object to an object of the same temperature radiation moves from a cool

Why does the closed top of a convertible bulge when the car is riding along a highway? Why does the closed top of a convertible bulge when the car is riding along a highway? The air pressure is greater outside the car than inside.