Answer:
1.3 m/s
Explanation:
average speed = total distance/ total time
 
        
             
        
        
        
KE= 1/2 mv^2
Kinetic Energy is equal to 1/2 x mass x velocity squared 
The mass of the larger ball has TWICE
 the kinetic energy. KE is directly proportional to the mass.
        
             
        
        
        
What do we know that might help here ?
-- Temperature of a gas is actually the average kinetic energy of its molecules.
-- When something moves faster, its kinetic energy increases.
Knowing just these little factoids, we realize that as a gas gets hotter, the average speed of its molecules increases.
That's exactly what Graph #1 shows.
How about the other graphs ?
-- Graph #3 says that as the temperature goes up, the molecules' speed DEcreases.  That can't be right.
-- Graph #4 says that as the temperature goes up, the molecules' speed doesn't change at all.  That can't be right.
-- Graph #2 says that after the gas reaches some temperature and you heat it hotter than that, the speed of the molecules starts going DOWN.  That can't be right.   
-- 
 
        
             
        
        
        
Answer:
option (b)
Explanation:
Let the resistance of each resistor is R. 
In series combination, 
The effective resistance is Rs. 
rs = r + R + R + .... + n times = NR
Let V be the source of potential difference. 
Power in series
Ps = v^2 / Rs = V^2 / NR ..... (1)
In parallel combination
the effective resistance is Rp
1 / Rp = 1 / R + 1 / R + .... + N times 
1 / Rp = N / R
Rp = R / N 
Power is parallel 
Rp = v^2 / Rp = N V^2 / R    ..... (2)
Divide equation (1) by equation (2) we get 
Ps / Pp = 1 / N^2 
 
        
             
        
        
        
Answer : Yes, distance measurements based on the speed of light used for objects in space.
Explanation :  A light year is measurement  of distance  that light travel in a one year. 
In a one year light travels 9460000000000 kilometer.
 We know that, speed of light is 
and  time is 31536000 seconds in 1 year
so, distance = speed of light X time 
Now, the light year is 
Example : The nearest star to earth is about 4.3 light year away.