Which property of light define light as a wave

1) observation of the doppler effect

2) ability to dislodge electrons from an atom

Calculate the kinetic energy (in units of kj and ft-lbf) for a 908 kg automobile traveling at 89 km/hour

When a siren is approaching you, how does the wavelength of the waves reaching you compare to the actual wavelength that the siren emits?

A double slit is illuminated with monochromatic light of wavelength 6.11 * 102 nm. The m = 0 and m = 1 bright fringes are separated by 1.8 cm on a screen which is located 3.5 m from the slits. What is the separation between the slits?

An action force is 40 N to the right. The reaction force must be: A. 20 N left B. 40 N left C. 20 N right D. 40 N right

The diagram shows the electric field lines around two charges. Based on the field lines, what is the best description of the charges?

A turntable is spinning on a frictionless axle when a ball of putty is dropped onto it from above. The putty sticks to the turntable when it lands. Is angular momentum conserved for the turntable and putty (the system) during this process?

A cheetah can run from 0 to 70 mph in 2.2 seconds. what is the cheetah's top speed in m/s?

Which statement about how light travels is true? A Light waves need a medium to travel, and they travel at the same speed even if the light source is moving.

Explain why the car reaches a top speed even though the thrust Force remains constant at 3500N

4. A helicopter is flying at a height of 1.5km. If it has 50MJ of G. P. E., what is the mass of the helicopter?