If there is no friction in a rollercoaster is the speed the same throughout?

How does ultraviolet light result in the formation of thymine dimers?

When molecules are heated up with a flame, what type of heat transfer is occurring between flames and molecules? a Conduction b Convection c Radiation

A spacecraft is separated into two parts by detonating the explosive bolts that hold them together. the masses of the parts are 1300 kg and 1700 kg. the magnitude of the impulse on each part from the bolts is 210 n · s.

The best place to look for crabs is between the high tide and low tide zones (the tidal flat). knowing this, would you expect to find more crabs during a full moon/new moon or during a quarter moon stage? explain why.

The amount of pressure in a gas is measured in pascals. true or false

A 0.2 kg conductor of length 0.8 m carries 2 ampere current to the right in a magnetic field. What is the magnitude and the direction of the magnetic field acting on the conductor if the net force on the rod is zero?

A model rocket with a mass of 0.181 kg is launched into the air with an initial speed of 92 m/s. How much kinetic energy will the rocket have at a height of 164 m? Assume there is no wind resistance.

Which factors improve soil fertility? Select the three correct answers. A. Artificial fertilizer B. High pH C. Water D. Bedrock E. Nitrogen-fixing bacteria

What is the change in internal energy if 60 J of heat are added to a system and the system does 40 J of work on its surroundings? Use AU = Q-W.

Maintenance in NFPA 70E is intended for preserving or restoring the condition of electrical power systems equipment or devices for?. Electrical safety is directly tied to the? of electrical power systems equipment.