Which of the following are properties of mechanical waves? O A. Wave motion begins with a disturbance in the medium
B. Waves transport energy from a source outward, away from the
source.
C. The particles of the medium always move parallel to the wave
motion.
D. Particles of the medium move back and forth, but do not move
with the wave.

When you turn on a battery-operated device, an electrical circuit is

In the circuit shown below, with each bulb holding a resistance of 60 ohms, how many amps of current are flowing? express your number as a decimal.

Engineers find a new metal that is stronger than steel but much lighter. this material is also significantly cheaper than what is currently used for most aircraft, available in large quantities, and easy to manufacture. the engineers are excited because this new material will lower the costs of buying and operating airplanes for companies. what is probably the best step for the engineers to make next?