Calculate the efficiency of an engine with an input temperature of 755 K and exhaust temperature of 453 K.

What is the difference between condensation and precipitation

Starting from the center of the earth number it's layers in correct order

If you see a crosswalk signal flashing, you should look out for: A. Vehicles illegally entering the intersection B. Pedestrians hurrying across the street C. Pedestrians yielding to cross traffic

What is the best way to ensure that the results of your experiment are accurate?

Which of the following universal forces is the weakest? A. electric B. gravitational C. strong nuclear

Why does water in hot springs always remain hot? Why doesn't it's thermal energy spread out?

True or false All forces are different; each exerts a particular type of effect on a object

The Yerkes refracting telescope has a 1.00 m diameter objective lens of focal length 20.0 m. Assume it is used with an eyepiece of focal length 2.50 cm. (a) Determine the angular magnification of the planet Mars through this telescope.

A small kid sits on a bike (Anita). A bigger and stronger person (Jamy) pushing the kid so that the kid starts speeding up. (neglect friction). Mark all correct statements about the forces between them. A.

A ___ is awarded to the opposing team when that team violently or dangerously charges a opponent. (in soccer) A) Goalie kick B) Indirect kick C) Direct kick D) Throw in