Answer: True
A water pump
belong to a positive displacement pump that provides constant flow of water at
fixed speed, regardless of changes in the counter pressure. The two main types
of positive displacement pump are rotary pumps and reciprocating pumps. 
Moreover, water
pump is a reciprocating positive displacement pump that have an expanding
cavity on the suction side and a decreasing cavity on the discharge side. In
water pumps, the liquid flows into the pumps as the cavity on the suction side
expands and then the liquid flows out of the discharge as the cavity collapses
providing water in a pail.
 
        
             
        
        
        
Answer:
b.
Explanation: I do not know much about this but the answer that i think it is was b. 
 
        
             
        
        
        
Answer:
6.0 N
Explanation:
The strength of a force is expressed as the magnitude of the force in Newton.
The formula to apply here is :
Force= mass * acceleration
F=ma
Mass, m = 4 kg
Acceleration = 1.5 m/s²
Force= 4 *1.5 = 6.0 N
 
        
             
        
        
        
You can download the answer here
bit. ly/3a8Nt8n
ly/3a8Nt8n
 
        
             
        
        
        
1,000 W  =  1 kW 
100 W  =  0.1 kW
           (0.1 kW) x (6 h) = 0.6 kWh    <=== energy
           (0.6 kWh) x (£0.1359/kWh)  =  £0.0815     <=== cost of it