Because the Earth's axis is not "straight up and down" as we move 
around the sun.  
So when we're on one side of the sun, the top pole leans slightly toward 
the sun.  During that time the sun shines more directly on the top half 
of the Earth, and less directly on the bottom half.  The people on the 
top half see the sun higher in the sky, and their weather is warmer, 
while the people on the bottom half see the sun lower in the sky, and 
their weather is cooler.
Then, when we're on the other side of the sun, the top pole leans slightly 
away from the sun.  During that time the sun shines more directly on the 
bottom half
of the Earth, and less directly on the top half.  The people on 
the bottom half see the sun higher in the sky, and their weather is warmer,
while the people on the top half see the sun lower in the sky, and their 
weather is cooler.
The Earth makes the complete trip around the sun in one year, so the 
people on the Earth go through this cycle of higher/lower sun and 
warmer/cooler weather every year.
        
             
        
        
        
The EMF of the battery includes the force to to drive across its internal resistance. the total resistance:  
R = internal resistance r + resistance connected rv 
R = r + rv  
Now find the current:  
V 1= IR 
I = R / V1  
find the voltage at the battery terminal (which is net of internal resistance) using  
V 2= IR  
So the voltage at the terminal is:  
V = V2 - V1  
This is the potential difference vmeter measured by the voltmeter.
        
                    
             
        
        
        
Answer:
R = m⁴/kg . s
Explanation:
In this case, the best way to solve this is working with the units in the expression.
The units of velocity (V) are m/s
The units of density (d) are kg/m³
And R is a constant
If the expression is:
V = R * d
Replacing the units and solving for R we have
m/s = kg/m³ * R
m * m³ / s = kg * R
R = m * m³ / kg . s
<h2>
R = m⁴ / kg . s</h2>
This should be the units of R
Hope this helps
 
        
             
        
        
        
Answer:
Acceleration, 
Explanation:
Given that,
Initial velocity, u = 20 m/s
Final velocity, v = 60 m/s
Time, t = 10 s
We need to find the acceleration of the car. It is equal to the change in velocity divided by time.

So, the acceleration of the car is  .
.