What is the average power developed by a motor as it lifts a 400-kilogram mass at a constant speed through a vertical distance of 10 meters in 8 seconds?.

The answer would be true!

Frequency is the number of complete oscillations of a wave per second.

B.  earth orbits at a slower rate than the rate at which the moon orbits earth.

Which of the following is an example of an opposing signal? no examplthates given.   i would say, that traffic lights in a city at major intersections direct the flow of traffic in opposite directions so would be an example.also, stop signs on either side of the same street would be an example. at a train crossing, the light for allowing car traffic in opposite directions or not would be another example.