Answer:
xaubUajnaai ajn AJ au aun a
Explanation:
ahayba uabah an aj
 
        
             
        
        
        
So, the work was done by that hot air-balloon is <u>30,000 J or 30 kJ</u>. 
<h3>Introduction</h3>
Hi ! In this question, I will help you. <u>Work is the amount of force exerted to cause an object to move a certain distance from its starting point</u>. In physics, the amount of work will be proportional to the increase in force and increase in displacement. Amount of work can be calculated by this equation :

With the following condition :
- W = work (J)
- F = force (N)
- s = shift or displacement (m)
Now, the s (displacement) can be written as ∆h (altitude change) because the object move to vertical line. The formula can also be changed to: 

With the following condition :
- W = work (J)
- F = force (N)
 = change of altitude (m) = change of altitude (m)
If an object has mass, then the object will also be affected by gravity. Always remember that F = m × g. So that :


With the following condition :
- W = work (J) 
- m = mass of the object (kg)
- g = acceleration of the gravity (m/s²)
 = change of altitude (m) = change of altitude (m)
<h3>Problem Solving</h3>
We know that :
- F = force = 100 N
 = change of altitude 300 m = change of altitude 300 m
What was asked :
Step by step :



<h3>Conclusion</h3>
So, the work was done by that hot air-balloon is 30,000 J or 30 kJ. 
<h3>See More :</h3>
 
        
             
        
        
        
Answer:
 the Earth's crust is broken into about 12 plates that float on hotter, softer rocks in the underlying mantle
Explanation:
 
        
             
        
        
        
<span>A light-year is the total distance that light can travel in 1 year.
Since, We know the speed of light (c) in vacuum= 299792458 metres per second
And, there are 365.25 days in an year, or t= (365.25*24*60*60) seconds
Hence a light-year (d)=c*t
=299792458Ă—365.25Ă—24Ă—60Ă—60 metres
=9,460,730,472,580,800 metres
â‰9.46073Ă—10^15 metres</span>