Cosmic background radiation is electromagnetic radiation from the sky with no discernible source. The origin of this radiation depends on the region of the spectrum that is observed.
Answer:
yes
Explanation:
you will feel weary after shorter times
Part A. For this part, we use two equations for linear
motion:
<span>y = y0 + v0 t + 0.5 g t^2 --->
1</span>
<span>vf = v0 + g t --->
2</span>
First we solve for t using equation 1: y0 = 0 (initial
point at top), y = 250 m, v0 = 0 (at rest)
250 = 0.5 (9.8) t^2
t = 7.143 s
Now we solve for final velocity vf using equation 2:
vf = g t
vf = 9.8 (7.143)
vf = 70 m/s
Part B. First we solve for the time it takes for the sound
to reach the tourist.
t(sound) = 250 / 335 = 0.746 s
Therefore the total time would be:
t = 0.746 s + 0.300 s
t = 1.05 s
<span>Hence there is enough time for the tourist to get out
before the boulder hits him.</span>
<em>Answer:</em>
<em>Answer:It is due to tyndall effect that the path of a light ray passing through a suspension is visible. The particles in suspension scatter the beam of light making it clearly visible.</em>
Answer: V = 675000v
Explanation:
Electric potential V can be calculated by using the formula
V = Kq/r
Where
V = electric potential
q = charge = 15µC
K = Coulomb constant = 9 × 10^9Nm^2C^-2
r = 20 cm
Substitute all the parameters into the formula
V = (9×10^9 × 15×10^-6)/20×10^-2
V = 135000/0.2
V = 675000 volt
