Shiny reflective clothing allows a firefighter to get closer to a fire. What type of heat transfer is reduced because of this material?

A. Conduction

B. Insulation

C. Radiation

D. Convection

If 20 beats are produced within one second, which of the following frequencies could possibly be held by two sound waves traveling through a medium along a common path at the same time? A. 38 Hz and 63 Hz B. 22 Hz and 42 Hz C. 47 Hz and 55 Hz D.

An engine manufacturer makes the claim that the engine they have developed will, on each cycle take 100 J of heat out of boiling water at 100 °C, do mechanical work of 80J, and exhaust 20 J of heat at 10 °C.

Does being creative in doing science mean that a scientist ahould make things up? why?

A ball is dropped from the roof of a building. If it takes the ball 2.6s to reach the ground, how tall is the building?

Which is a sub-atomic particle? A) compound B) electron C) isotope D) neuron

To lift a car, you use a hydraulic lift filled with a fluid that has density of 1 1200 kg/m3. The radius of one half of the lift is 0.5 meters and the diameter of the other half of the lift is 2.5 meters.

Charlie runs an auto repair and mechanic shop. A hot rod has come in with mass 1500 kg requiring a repair. He needs to raise the car using a hydraulic lift on a piston (Piston A) having a radius of 25 cm.

What does 4_2 helium means

The type of energy transferred by a wave in a medium is energy

With an average acceleration of - 2.4 m/s2, how long will it take a cyclist to bring a bicycle with an initial speed of 13.2 m/s to a complete stop? Answer in units of s.