A white dwarf can dramatically increase in brightness only if it

(a) has another star nearby;

(b) can avoid nuclear fusion in its core;

(c) is spinning very rapidly;

(d) is descended from a very massive star.

If a helicopter's mass if 4500kg and the net force onit is 18000 N upward what is its acceleration?

Forensic Odontologists look at number of teeth, tooth development and tooth degeneration to determine A) age B) ancestry C) weight D) height

What happens to the resistance of a wire as its length increases? A. The resistance decreases. B. The resistance is not affected by a change in wire length. C. The resistance alternates between high and low values. D. The resistance increases.

An elevator has a massif 1000 kg what is the tension force on its cables when it is stationary

Why ae the bricks more dense than feathers

Explain what force caused the continents to move from one super continent to there current form

A 5 kg ball approaches a wall at a speed of 4 m/s. It then bounces off the wall in the opposite direction at the same speed. What is the magnitude of the average force exerted on the ball if it is in contact with the wall for 0.1 s?

When a basketball player dribbles a ball, it falls to the floor and bounces up. Is a force required to make it bounce? Why? If a force is needed, what is the agent involved?

Compare the friction force on the cart when it is rolling along the blacktop parking lot to the friction force on the cart when it is inside the grocery store (assume the flooring is smooth vinyl tile).

Which of the following objects has the most kinetic energy? a car going 60 miles per hour a spring that is compressed a rock sitting on the edge of a cliff a bicycle going 10 miles per hour