NEED ANSWERS ASAP: A tennis player throws a ball directly upwards for their serve to a height of 0.56m from the point of the release. What was the velocity of the ball when it was released?

Acertain radio station broadcasts radio waves that have a wavelength of 298cm what is its broadcast frequency?

How can waves travel through ground?

The heater element of a 120 v toaster is a 5.4 m length of nichrome wire, whose diameter is 0.48 mm. the resistivity of nichrome at the operating temperature of the toaster is 1.3 × 10-6 ω·m. the toaster is operated at a voltage of 120 v. (a) what is the power drawn by the toaster? (b) if the cost of electricity is 12 ¢ per kilowatt-hour, and it takes 2 minutes to toast bread, how much does it cost for toasted bread? (c) when the heater element is at room temperature, is the resistivity in the nichrome wire greater than, less than, or equal to it’s resistivity when at operating temperature? explain.