Answer:
a. one-half as great 
Explanation:
The power developed by the first lifter is one-half as great as that of the second person. 
   Power is defined as the rate at which work is done; 
           Power  =  
 
Since the two lifters do the same work at different time, let us estimate their power;
        P₁ =  P₂ =
                     P₂ =  
 
    We see that for P₁, power is half of the work done whereas in P₂ power is the same as the work done. 
Therefore, 
            The power of the first weight lifter is one-half the second lifter. 
 
        
             
        
        
        
Answer:
A measure of the ability of a material to transfer heat.
Explanation:
Please mark me as brainliest please 
 
        
             
        
        
        
<h3>
Answer:</h3>
1.5 m/s²
<h3>
Explanation:</h3>
We are given;
Force as 60 N 
Mass of the Cart as 40 kg 
We are required to calculate the acceleration of the cart.
- From the newton's second law of motion, the rate of change in momentum is directly proportional to the resultant force.
- That is, F = ma , where m is the mass and a is the acceleration
Rearranging the formula we can calculate acceleration, a
a = F ÷ m 
   = 60 N ÷ 40 kg 
   = 1.5 m/s²
Therefore, the acceleration of the cart is 1.5 m/s²
 
        
        
        
Answer:
air resistance, gravitational force
 
        
             
        
        
        
The statement “When
an object is in orbit, it is falling at the same rate at which the Earth is
curving” is true. The speed of a satellite orbiting the earth depends only on
the mass of the earth and the mass of the satellite.