A 60 W light bulb at 120 V is left on in your house to prevent burglary, and the power charges 10 cents per kilowatt-hour, how much will it cost to leave the bulb on for 30 days?

A car travels 400 km in 5 hours. what is the average speed of the car (in km/hr) ?

Without the force of friction, people would not be able to walk. a. True b. False

A box is pulled with a horizontal force of 500N and moves 5m. What is the work done?

Laura thinks that the oak tree has the largest leaves of all the trees at the playground. How could she best test her prediction? A. Measure the height of each of the trees at the playground. B.

A ball is dropped and falls with an acceleration of 9.8m/s2 downward. it hit the ground with a velocity of 49 m/s downward. how long did it take the ball to fall to the ground?

The force of attraction that holds two atoms together within a molecule is

An incident ray traveling in a slower medium strikes a boundary with a faster medium. What happens when its angle of incidence is greater than the critical angle?

Question 1 [7] Hydrogen gas is used in a Carnot cycle having an efficiency of 60% with a low temperature of 300K. During the heat rejection the pressure changes from 90 kPa to 120 kPa.

Technician A says a pull to the right during braking could be caused by a defective metering valve. Technician B says a pull to the left could be caused by a defective proportioning valve. Which technician is correct

Can Radiation transfers energy by moving matter.