A machine has an efficiency of 70%. How much work dose the machine do when 20,000 J of work is done on it?

How does the climate of coastal regions compare with inland regions?

A factory employee spends two hours putting together a car part. A machine can do the same job in thirty minutes. Which statement best describes the time-effectiveness of this scenario? The employee is four times as time-effective as the machine.

Add or subtract as indicated. a. 5.80 x 10^9 s + 3.20 x 10^8 s b. 4.87 x 10^-6 m - 1.93 x 10^-6 m

Four beats per second are heard when an unknown tuning fork and a 240 Hz tuning fork are struck simultaneously. This same unknown tuning fork and a 250 Hz tuning fork are struck. Six beats are heard. Its exact frequency?

What is the term for the pattern of spiral impressions inside a handgun? A) rifling B) ejector markings C) lands and grooves D) extractor markings

Which two states share the property of changing shape in different containers? A. Liquids and gases B. Gases and solids C. Solids and liquids D. Solids and plasmas

Which type of soil is the most permeable? A. sand B. silt C. loam D. clay

If your mass is 20kg, and you stand on the scale (witch is your force), and the acceleration due to gravity is10m/s^2, what does the scale says your weight is?

Which statement best describes the movement of particles when a wave travels through a medium? The particles are

What is the acceleration of all objects due to gravity? What does this mean?