An engine uses 5280 j of input heat to do 702 j of work. what is its actual efficiency'

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In the bedroom of your house you would like to run a 240 W toward, a 30 W alarm clock, a 720 W tanning bed, and four 60 W lights. Assuming your house is wired for 120 Volts, how much current will be pulled by these electrical devices?

A car is traveling with a constant speed when the driver suddenly applies the brakes, giving the 14) car a deceleration of 3.50 m/s2. if the car comes to a stop in a distance of 30.0 m, what was the car's original speed?

Which of the following is a simple machine? A. wedge B. meat grinder C. car D. bicycle

The formula for density is d=m/v. Where m is mass and v is volume. If mass is measured in kilograms and volume is measured in cubic meters, what is the unit for density?

An insoluble solid material that is produced in double replacement reactions is called

A basketball player drops a 0.60-kg basketball vertically so that it is traveling at 6.3 m/s when it reaches the floor. The ball rebounds upward at a speed of 5.3 m/s.

Describe how humans' actions and natural processes have modified coastal regions in Louisiana and other locations

Visualize five horizontal sedimentary strata exposed in a cliff or canyon wall identified by consecutive numbers, 1 being the lowest bed and 5 being the highest. Which of the following statements concerning the strata are true? a.

The characteristics that follow are characteristics of two of Galileo's surviving double-convex lenses. The numbers given are magnitudes only; you must supply the correct signs. L 1: front radius 950 mm, rear radius 2700 mm, refractive index 1.