Answer:
Im pretty sure it's C
Explanation:
The answer A talks about constant speed, which does not correspond to Net Force. The answer B, talks about constant velocity, but talks about how much force apposes the box. The answer C talks about the value of the net force acting on the box, so im pretty sure the answer is C.
Answer:
i think its 4 or 35
Explanation:
its in the middle of 40 and 30
Answer: Sound waves will not be transformed into electrical signals.
Explanation: Just took the test and got a 100!
Answer:
Refractive Index = 1.52
Explanation:
As we know speed of light in vaccum is 3 x 10^8 meters per second and distance tavelled by light is 3.97 km or 397000m.
Time taken by light in vaccum = distance / speed = 397000 / 3 x 10^8 = 1.323 x 10^-3 s
Speed of light in liquid = distance / time taken = 261000 / 1.323 x 10^-3 = 197278911 ms^-1 = 1.972 x 10^ 8 ms^-1
According to Snell's law
Refractive index = speed of light in vaccum / speed of light in medium = 3 x 10^8 ms^-1 / 1.972 x 10^8 ms^-1 = 1.52
