How are potential and kinetic energy different?

Two commuter rail cars, one from Shah Alam and the other from Kuala Lumpur approach each other on parallel tracks. Each has a speed of 100km/h with respect to the earth.

If displacement is negative, is velocity negative too?

Which statement is true about black dwarfs? A. None currently exist in the universe. B. They are very hot and massive. C. They burn brightly for only a few weeks or months. D. They form after supernova explosions ...?

A man pushes a grand piano along a level stage with 380 N force that is 15° above the horizontal. The piano moves 4.6 m in 9.5 seconds. What is the work he does on the piano? (Round your answer to two significant figures

Which of the following statements about a metal wire in equilibrium are true? Select all that apply. There cannot be excess charges on the surface of the wire. There may be excess charges in the interior of the wire.

If your mass is 20kg, and you stand on the scale (witch is your force), and the acceleration due to gravity is10m/s^2, what does the scale says your weight is?

Which statement best describes the movement of particles when a wave travels through a medium? The particles are

What is the acceleration of all objects due to gravity? What does this mean?

Which is the correct formula for cellular respiration? a. 6 CO2 + 6 H2O + light energy → C6H12O6 + 6 O2 b. CO2 + H2O → C6H12O6 + O2 c. C6H12O6 + O2 → CO2 + H2O d. C6H12O6 + 6 O2 → 6 CO2 + 6 H2O + ATP energy

A tree is standing in the middle of a meadow. As you watch, the wind begins to blow and the tree bends. Which statement best explains how you could tell that a net force was acting on the tree? OA) The tree had momentum.