The answer is 2.3. I just answered this question and got it right.
Answer:
m = 40.8 [kg]
Explanation:
We know that weight is defined as the product of mass by gravitational acceleration in this way we have the following equation.
where:
W = weight [N] (units of Newtons)
m = mass [kg]
g = gravity acceleration = 9.8 [N/kg]
Therefore:
Answer:
Explanation:
Given
COP= 60 % of carnot heat pump
For heat added directly to be as efficient as via heat pump
An independent variable is a variable that does not depend on anything. It is manipulated to determine the value of a dependent variable<span>. The dependent variable is what is being measured in an experiment or evaluated in a mathematical equation and the independent variables are the inputs to that measurement. Example: Time would always be an independent variable because nothing affects time, however, time can affect everything. </span>
Answer:
A
Explanation:
If you do B, the wagon slows down due to friction
If you do C, it would slow down the wagon by half
If you do D, it would slow it down, due to there being more weight but same force.