Answer:
Explanation:
speed of alien spaceship = .1 c
We shall apply formula of relativistic mechanics to solve the problem
relative velocity =
Here v = v₁ = .1 c
relative velocity = .1c + .1 c / 1 - .1²
= .2 c / .99
= .202 c
The earth would receive the signal at the speed of .202 c .
When two circuit elements (e.g., light bulbs, resistors, etc.) are in PARALLEL, the voltage drop across each element must be the same.
(choice-b)
When the same two circuit elements are in SERIES, the current through each element must be the same.
Answer:
The dominant wavelength of the sun is 
Explanation:
Wien's law is defined as:
(1)
Where 
is the maximum wavelength, c is the Wien's constant and T is the temperature.
Therefore, can be isolated from equation 1.
(2)
Notice that it is necessary to express the Wien's constant in units of meters
⇒ 
Finally, equation 2 can be used:
Hence, the dominant wavelength of the sun is
When all that body heat hits the white clothing covering it, it gets reflected right back towards the body. ... The best color to keep cool in the heat, it turns out, is to wear black. Black absorbs everything coming in from the sun, sure. But black also absorbs energy from the body instead of reflecting it back.
I think the answer is C. Remaining constant
