The diagram shows a device that uses radio waves.
What is the role of the part in the diagram labeled X?
Х
O modulate, amplify, and send out waves
O capture, amplify, and demodulate waves
O change the amplitude and frequency of waves
o change the pulse and phase of waves

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?

What causes the formation of ocean currents?

Water flows through a garden hose which is attached to a nozzle. the water flows through hose with a speed of 2.19 m/s and through the nozzle with a speed of 19.8 m/s. calculate the maximum height (in m) to which water could be squirted if it emerges from the nozzle and emerges with the nozzle removed.