Waves from a radio station have a wavelength of 220 m. they travel by two paths to a home receiver 20.0 km from the transmitter. one path is a direct path, and the second is by reflection from a mountain directly behind the home receiver. what is the minimum distance from the mountain to the receiver that produces destructive interference at the receiver

Current enters a circuit at a: 1.positive terminal 2.negative terminal 3.low potential side 4.resistor

An ideal gas is held in a container at constant volume. initially, its temperature is 5 degrees c and its pressure is 1.2 atm. what is its pressure when its temperature is 43 degrees c? answer in units of atm

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?