A person is standing on a completely frictionless surface. Can they walk on this surface? Explain! What could they do to move across the surface? Explain!

An electric motor must have which of the following in order to work? galvanometer, power source, secondary coil, or primary coil

Explain why machines are never 100% efficient.

How are you able to determine if conservation of momentum occurs in each collision?

Which of the following jobs does not require good swimming ability? Marine biologist Navy Seal Lifeguard Water quality technician

What characterizes an elastic collision, but not an inelastic collision, in a closed system? A. Momentum is conserved B. Total energy is conserved C. Kinetic energy is conserved D. No external net force acts I think it is B.

In 1991 four English teenagers built an eletric car that could attain a speed of 30.0m/s. Suppose it takes 8.0s for this car to accelerate from 18.0m/s to 30.0m/s. What is the magnitude of the car's acceleration?

What must you do if you plan to exercise everyday

Determine the speed of sound in air at 700 K. Also determine the Mach number of an aircraft moving in the air at a velocity of 340 m/s. The gas constant of air is R = 0.287 kJ/kg·K. Its specific heat ratio at room temperature is k = 1.4.

If the emf of the battery is 12 v and each resistance is 4 ω, what power is consumed by bulb b?

If you want to conduct an electrical current, which situation would produce a solution capable of this? A) Dissolving water in oil. B) Dissolving sugar in water. C) Dissolving solid NaBr in oil. D) Dissolving solid NaF in water.