Answer:
That the speed of light is constant
Explanation:
E = mc2
Answer:
I actually have 20000 arena points thank you very much
Answer:

Explanation:
given,
speed of wave, c₁ = 7.7 m/s
angle of incidence, i = 44°
angle of refraction, r = 33°
speed of wave in second medium.
using Snell's law
n₁ sin i = n₂ sin r



now,
calculation of velocity in the medium
n₁ c₁ = n₂ c₂




Speed of wave in the second medium is equal to 6.04 Km/h
Answer:
work accomplished = 300*30
= 9,000 J
applied work = 9,000 + 2,000 = 11,000 Joules
efficiency = 100 * work accomplished/work applied
= (9/11)100 = 81.8 %
force applied = (300/6)/.818
= 61.1 N
assuming that the 6 in your question refers to mechanical advantage
Answer:
69.66 rad/s
Explanation:
Suppose the handle of the crank is L = 1 m long. We can calculate the torque:
T = F*L = 258*1 = 258 Nm
Then the angular momentum is given to the handle within 0.27 seconds is
rad/s