Thick cloud cover over the whole of planet Earth would block out sunlight from reaching the surface. This means that it would lower the temperature on the Earth's surface.
When water vaporizes into the air, it becomes humid out.
Answer:
Because of the presence of air resistance
Explanation:
When an object is in free fall, ideally there is only one force acting on it:
- The force of gravity, W = mg, that pushes the object downward (m= mass of the object, g = acceleration of gravity)
However, this is true only in absence of air (so, in a vacuum). When air is present, it exerts a frictional force on the object (called air resistance) with upward direction (opposite to the motion of free fall) and whose magnitude is proportional to the speed of the object.
Therefore, it turns out that as the object falls, its speed increases, and therefore the air resistance acting against it increases too; as a result, the at some point the air resistance becomes equal (in magnitude) to the force of gravity: when this happens, the net acceleration of the object becomes zero, and so the speed of the object does not increase anymore. This speed reached by the object is called terminal velocity.
Answer:
the noise level of 5400 flies is equal to 84.32 dB
Explanation:
Noise made by house flies = 47 dB from the distance of 2.4 m
to calculate the noise of 5400 flies at a distance of 2.4 m.
the intensity of noise
now, I' = 5400 I₀
= 
= ![10 [log_{10}[5400] +log_{10}(\dfrac{I}{I_0}))](https://tex.z-dn.net/?f=10%20%5Blog_%7B10%7D%5B5400%5D%20%2Blog_%7B10%7D%28%5Cdfrac%7BI%7D%7BI_0%7D%29%29)
= 10 ( 3.732 + 4.7 )
= 84.32 dB
hence, the noise level of 5400 flies is equal to 84.32 dB
