That is the definition of pressure. The amount of force exerted over a certain area: N/m^2 (Newtons per square metre).
Aluminum mixed iron .Al + fe = AlFe3
If the angle is either 0 or 180, that means that there is either negative or positive work, so A and D are not correct.
If the angle is 45, then there is still some work involved.
The only option where there is no work done by a force is B. when the angle is between the force and displacement is 90.
The independent variable in the experiment is the soap and the dependent variable in the experiment is the number of water drops on the surface of the penny. The control is the penny without soap.
I got you bruh the answer is...
2
