Answer:- 0.134 seconds
Solution:- The speed is given as 
and the circumference is 24900 miles which is same as the distance light have to covered. It asks to calculate the time required to cover this distance by the light.
We need to do unit conversion from miles to meter as the speed is given in meter per second.
1 mile = 1609.34 meter
So, 
= 40072566 meters
Know that, 
It's rearranged to time as, 
Let's plug in the values in it:
= 0.134 seconds
So, the light would take 0.134 seconds to travel the mentioned speed. The answer without the unit is 0.134.
Answer:
9
Explanation:
mass number =protons+neutrons
Well when the sun makes water dissaper thats usually evaporation.
The chemical changes is when the plants absorb the energy from the sunlight and convert water and carbon dioxide into sugar and oxygen gas. Physically nothing has changed. The plant still looks the sam changes occur internally these internal changes are chemical in nature.
Answer:
The half life of element XY is 12 days
Explanation:
Given:
Time taken for 1024 grams to decay into 32 grams = 60 days
To Find:
The half life of element XY = ?
Solution:
The Half life is calculated by
=
Substituting the values,
=
=
=
= 12
I don’t know is this science ??
