Answer:
It is enough
Explanation:
To develop the problem it is necessary to take into account the concepts related to the coefficient of performance of a pump.
The two ways in which the performance coefficient can be expressed are given by:

Where,
High Temperature
Low Temperature
And the other way is,

Where
is heat rate and W the power consumed.
We have all our terms in Celsius, so we calculate the temperature in Kelvin


The rate at which heat is lost is:

The power consumed by the heat pump is

And the coefficient of performance is



With this value we can calculate the Power required,




<em>The power consumed is consumed is 5kW which is more than 2.07kW so this heat pump powerful enough.</em>
Answer:
the correct answer is D.) 2,4
Answer:
4
Explanation:
friction
weight
normal reaction
force to overcome inertia
im a bit confused on what the question is:(
if its just asking for the total number of km traveled it would be 21 km
Answer:
Explained below.
Explanation:
For a boat or any object to float on water, it's density must be less than that of water.
Now, when the maximum capacity of people to be carried by the boat is exceeded, it's possible that the maximum mass of people will also be exceeded depending on the mass of the people in the boat.
Now, we know that; density = mass/volume.
Thus, the higher the mass of the people, the higher the density and the higher the density, the more likely it is to be above that of water and the more likely it is to sink.