Answer:

Explanation:
A number can be written in the form of :

Where
m is the real number
n is any integer
In this case, the average distance from the Sun to the Earth is given,
d = 150000000000 meters
There are 10 zeroes in this number. We need to write this number in scientific notation. It is given by :

So, the average distance from the Sun to the Earth is
. Hence, this is the required solution.
Answer:

Explanation:
v = Velocity of the breeze = 4 m/s
w = Width of the valley = 5000 m
h = Height of the valley = 1000 m
Volumetric flow rate is given by

= Mass flow rate of pollutant = 25 g/s = 
Concentration is given by

The steady state concentration of pollutants in the valley, is
.
Angle of incidence is 36° and so is the reflection. Both angles are equal.
Heya user☺☺
All options are wrong here.
The correct answer is..
Work/Time.
Hope this will help☺☺