What is the mechanical advantage of a

machine that exerts a force of 160 N on

an object when a person exerts a force of

20 N on the machine?

Is semic a mechanical wave

Which of the following plays a major role in creating deep ocean currents

three identical metal spheres are labelled a, b and c. initially, a has charge + 5q/2, b has charge + 3q/2 and c has charge - 4q. b is first touched to a, removed, then touched to c and removed.

What is the displacement for a person that walks 3.0km north and 8.0 km south

In which case is there an induced electromotive force? A. A permanent bar magnet is held inside a coil of wire B. Field line's from earths magnetic field cross the area of a coil of wire C.

A car rounds a 75-m radius curve at a constant speed of 18 m/s. a ball is suspended by a string from the ceiling the car and moves with the car. the angle between the string and the vertical is:

A wave has a wavelength of 7 mm and a frequency of 9 hertz. What is its speed?

Which statement best describes the effect of scientific advances on society? A. They always have a positive impact on society. B. They are inspired by the needs of society. C. they do not affect society beyond the community level. D.

Which is the best example of reusing? repairing a stove instead of buying a new one wearing a pair of pants made from cotton buying a toy packaged in paper instead of plastic placing a glass bottle in the recycling bin

The sunlight hits the surface of a lake this will like caused a. condensation b. transpiration c. evaporation d. sublimation