Answer:
This is because dust storms lasting for weeks cause the atmosphere to change color.
Explanation:
Dust is a major component in the mars atmosphere . A dust storm that lasts long period will effect the visibility , atmospheric structure of the mars . There are two types of storms that are found on mars , one of them is covered large areas and last for more than six days in mars . The second one covers smaller areas and stays for short interval of time . Scientists even discovered few storms which last more than 15 to 20 martian days which are responsible for color change.
Answer:
D
Explanation:
Work done refers to the product of the Force and the distance moved by the object in the same direction as the force. The formula is given by:
W = F × D
W is the Work Done in J
F is the Force in N
D is the parallel distance in m.
Hence by applying the Formula, we get:
W = 55(10)
= 550
Hence <u>answer is D.</u>
It take 365 1/4 days basically, one year.
Answer:
Explanation:
The energy of a photon is given by the equation , where h is the <em>Planck constant</em> and f the frequency of the photon. Thus, N photons of frequency f will give an energy of .
We also know that frequency and wavelength are related by , so we have , where c is the <em>speed of light</em>.
We will want the number of photons, so we can write
We need to know then how much energy do we have to calculate N. The equation of power is , so for the power we have and considering 1 second we can calculate the total energy, and then only consider the 4% of it which will produce light, or better said, the N photons, which means it will be .
Putting this paragraph in equations:
.
And then we can substitute everything in our equation for number of photons, in S.I. and getting the values of constants from tables: