The elevator of a large building is to raise a net mass of 400 kg at a constant speed of 12 m/s using an electric motor. minimum power rating of the motor should be

Matching fossils go with what hypothesis?

What causes water pipes to break in freezing weather

This device combines multiple circuits at one end of a connection into a single complex circuit on a single wire. The signal is then split into the individual connections on the other end.

The atmosphere flows in large convection currents. what happens during atmospheric convection

A fish swimming behind an oil tanker gets caught in a whirlpool created by the ship's propellers. The fish has an initial angular speed of 0.70 rad/s. After 4.3 s, the fish's angular speed is 13.7 rad/s.

ions are atoms or groups of atoms that have a positive or negative charge. which of the following statements is true of ions?

1. According to the nebular theory, the solar system formed from? A. accretion of protoplanets. B. a large, thin cloud of dust and gas. C. colliding planetesimals. D. all of the above 2.

What is the difference between tangential acceleration and centripetal acceleration?

A ball rolls down a ramp. The ball has a mass of 1 kg and it has 18 joules of kinetic energy. What is the ball's speed?

Scientists now think high-fructose corn syrup may disrupt appetite control, making people more often o sleep get angry Ceat fast