Answer:
Energy, 9 kWh or 32400 kJ
Explanation:
Given that,
The power of heater, P = 3 kW
It runs for 3 hours to raise the water temperature to the desired level. We need to find the amount of electric energy used. We know that the electrical power of an object is given by total energy delivered per unit time. It is given by :



E = 9 kWh
Since, 1 kWh = 3600 kJ
E = 32400 kJ
So, the amount of electric energy used is 9 kWh or 32400 kJ. Hence, this is the required solution.
Answer:
First answer.
Explanation:
There may be a 5N force, but if the frictional force also equals 5N, than they cancel eachother out, resulting in the brick still staying still, as it is resting on a (perfectly) level surface, but any amount of force would make the brick move.
Answer:
The Production Function is the relationship between the quantity or variables of output and the different inputs quantities used in the production process.
Explanation:
Generally in quality, production or any business, we need to know what is the output with respect to different input variables. Suppose if an output is about bottle produce per hour, then we look at the inputs such as temperature, raw material/inventory, power supply, manpower, etc which are needed to produce bottle. any changes, for example in temperature could change the production rate.
Furthermore, a graph is made to see the production function.
Answer:
drag force 
Velocity (V) = 40.169 m/s
Explanation:
The drag force
is given by the formula:

where:
= drag coefficient depending on the Reynolds number
Reynolds number Re = 
Let's Assume that the air is in room temperature at 25 °C ; Then
density of the air
= 1.1845 kg/m³
viscosity of fluid or air
= 1.844 × 10⁻⁵ kg/ms
diameter of the baseball D = 7.4 cm
Velocity V = 44.3 m/s
Replacing them into the equation of Reynolds number ; we have :

A = Projected Area
From the diagram attached below which is gotten from NASA for baseball;
the drag coefficient which depends on Reynolds number is read as:
= 0.3
Projected Area A = 
A = 
A = 0.0043 m²
Finally, drag force is then calculated as ;

b)

since acceleration a = 
Then;

Also;
velocity (V) = 
Then;



Then;


Integrating the above equation ; we have :

when time (t) = 0 ; then 
44.3 = - 10 × 0 + C
C = 44.3

Time (t) =

∴ Velocity ; 

Velocity (V) = 40.169 m/s
The answer for this question would be the term SURGING. Surging is the fast-moving glacier that can move up to 6 kilometers per year. I<span>t flows more quickly, sometimes moving 10 to 100 times faster than it normally does. This is one of the classification of a glacier aside from the normal type. Hope this answers your question.</span>