Light is described as both wave as well particle because light behave as wave in phenomenon like diffraction, interference, refraction, Doppler effect, etc whereas it behave as a particle in phenomenon like photoelectric effect, etc. Hope this helps.
Answer:
centripetal force- a fore force acts on a body moving in a circular path and is directed towards the center the body is moving
centrifugal force-is a force that acts outward and moving around a center like at six flags and swings tahts fly u in air or the spinning things at the park
direction of the velocity- velocity being a victor has both a magnitude and a direction
Answer:
30ft/s
Explanation:
U'1-2 = 0
Using the equation
T1 + Vg1 = T2 + Vg2
Take dactum Vg1 = 0 at ground level
T1 =[ 1/2 × (175 + 10)/32.2] × V^2
T1 = 2.87V^2
T2 = 0
Vg1 = (175 + 10) ×(42/12) = 648ft.lb
Vg2 = 175(18) + 10(8) = 3230ft.lb
Therefore, 2.87V^2 + 648 = 0 + 3230
3230 - 648 = 2.87V^2
2582 = 2.87V^2
V^2 = 2582/2.87
V ^2 = 889.65
V = Sqrt (889.65)
V = 29.99 = approximately 30ft/s
