Astationary police officer directs radio waves emitted by a radar gun at a vehicle moving toward the officer. compared to the emitted radio waves, the radio waves reflected from the vehicle and received by the radar gun have a
(1)longer wavelength
(2)higher speed
(3)longer period
(4)higher frequency

Classify each possible hypothesis about a medicinal aloe vera plant as falsifiable or non-falsifiable. aloe vera gel is the best natural skin moisturizer. aloe vera gel can heal wounds by boosting cell renewal. aloe vera juice tastes better than carrot juice. drinking aloe juice can reduce the risk of lung cancer.

Determine the fraction of the magnitude of kinetic energy lost by a neutron (m1 = 1.01 u) when it collides head-on and elastically with a target particle at rest which is 21h (heavy hydrogen, m = 2.01 u).

The two required components for a generator