Light travels fastest when moving through

A measure of how much an object slows down light as it passes through a medium is called

One hazard of space travel is debris left by previous missions. there are several thousand objects orbiting earth that are large enough to be detected by radar, but there are far greater numbers of very small objects, such as flakes of paint.

In most four-stroke internal combustion engines, when does the piston move upward? A. during the compression stroke only B. during the compression and exhaust strokes C. during the intake and exhaust strokes D. during the power and intake strokes

How much work will a machine with a power rating of 1.1 * 103 watts do in 2.0 hours? A. 1.5 * 106 joules B. 2.1 * 106 joules C. 4.0 * 106 joules D. 8.1 * 106 joules

Make sure that you spend extra time warming up during - O O A. spring B. cold weather O c. the afternoon O D. a heat wave

How many neutrons are present in an atom of iron-54? A) 26 B) 28 C) 30 D) 54

Sound waves are mechanical waves in which the particles in the medium vibrate ina direction parrallel to the direction of energy transport. What is another name of the type of wave that transfers energy in this way?

A sound from a source has an intensity of 270 db when it is 1 m from the source. what is the intensity of the sound when it is 3 m from the source?

What experimental term is it when a ruler is dropped to the floor?

Where is most of the energy from incoming waves focused? A. spit B. headland C. underwater D. barrier beach