how much force does the motor of an elevator need to exert to hold a 1000 kg elevator still if the counterweight weighs 7000 newtons?

A circuit featuring multiple paths through which current can flow is best classified into which category? A. a series circuit B. an open circuit C. a parallel circuit D. a short circuit

A 9-kg object is at rest. Suddenly, it explodes and breaks into two pieces. The mass of one piece is 6 kg and the other is a 3-kg piece. Which one of the following statements concerning these two pieces is correct? a.

Tear-free shampoos are advertized as having a pH similar to that of human tears. What pH would you expect tear-free shampoos to be? Use evidence from the lab activity to support your response

Uranus has more than 14 times as much mass as earth, yet the gravitational force is less. how can that be?

What is the total energy required to change 15 g of ice at - 20°C to water at 100°C?

A 26-g steel-jacketed bullet is fired with a velocity of 630 m/s toward a steel plate and ricochets along path CD with a velocity 500 m/s.

A small boat is carrying four people across a river. Without any paddling, the boat moves downstream at a steady speed of 5 m/s. If the average weight of the four people is 60 kg, then what is the speed of the boat after one person gets?

Does temperature affect the dissolving phase?

In a clear, coherent, paragraph-length answer, explain why the speed of the apple half way between the release and the maximum height is not half the initial speed.

In pea plants Round (R) is a dominant trait and wrinkled nose (r) is a recessive trait. Which combination would result in wrinkled seeds? 1. RR 2. Rr 3. rr 4. ww