Your answer is C. Dark Matter.
Answer:
1.15 rad/s²
Explanation:
given,
angular speed of turntable = 45 rpm
=
=
time, t = 4.10 s
initial angular speed = 0 rad/s
angular acceleration.
Hence, the angular acceleration of the turntable is 1.15 rad/s²
Martin Cooper invented the cell phone
Answer:
a) , b)
Explanation:
a) The final angular speed is:
The angular acceleration experimented by the centrifuge is determined by means of the following kinematic expression:
b) The change in angular position is:
Lastly, the total amount of revolutions made by the centrifuge is:
Answer:
a) s
b) 3.41 mm
Explanation:
a)
We take the speed of light, c = m/s and the refractive index of glass as 1.517.
Speed = distance/time
Time = distance/speed
Refractive index, n = speed of light in vacuum / speed of light in medium
b)
We take the refractive index of water as 1.333.
Speed in water = speed in vacuum / refractive index of water
Distance = speed * time
d = 3.41 mm