An electron with speed 150 m/s is shot straight up. What is the wavelength of the electron when it reaches a height of 500 m?

You notice a very one-dimensional-thinking snail crawling along one rail of a railroad track. naturally, you remove it to a safer place. but before you do, you observe it as it moves from position xi = -92.9 cm to position xf = -64.9 cm along the rail, as measured from a point where one rail abuts the next. what is the snail\'s displacement δx in centimeters?

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

Ideal meters problem. what internal resistance is ideal for a voltmeter? what internal resistance is ideal for an ammeter?