I do not know what the school expects as an answer, but advantage of reflecting telescopes is that there is only one major reflecting surface, so it is quite easy to create a 6 or 8 inch telescope by an amateur, after adding on a prism and an eyepiece. (a microscope eyepiece could be used).
MY answer would be "easier to build". (it still takes tens of hours to grind and polish the single plane surface to a parabolic surface).
Electromagnetic waves all have the same velocity in the same medium. However, since frequencies vary widely, so do wavelengths.
Answer:
Option A is correct
Explanation:
-The ten amendment was proposed for the sole purpose of protecting the minority from the brute greed of the majority.
- people established democratic government to protect the right, interest and welfare of the common people.
- The electoral college was designed for the sole purpose of protecting the minority interest and prevent special interest which is not in the public interest during electoral processes.
Answer:
a)
n=sin i/sin r
n= -0.305/-0.428
n=0.713
b)
sin c=1/n
sin c=1/0.713
sin c= 1.403
c=sin⁻¹(1.403)
c= 40.842°
Explanation:
i hope it will be helpful
plzzz mark as brainliest
Your question has been heard loud and clear.
Averge velocity formula= Total distance travelled / total time taken.
Total distance=7meters
Total time taken=9 seconds.
Average velocity = 7/9= 0.77 metres/second
Average velocity= 0.77m/s
Thank you.
Answer:
Explanation:
The momentum will be conserved .
M₁ V₁ =M₂V₂
2.3 x 15 = 75 x V
V = .46 m/s
velocity of astronaut will be 0.46 m/s after the throw of wrench .
Impulse = change in momentum
= 75 x .46 - 0
= 34.5 kg m/s
Impulse = force x time
34.5 = force x .12
force = 34.5 / .12
= 287.5 N
average acceleration
= force / mass
= 287.5 / 75
= 3.83 m /s²
