Answer:
Weight. Recall that the acceleration of a free-falling object near Earth's surface is approximately g=9.80m/s2 g = 9.80 m/s 2 . The force causing this acceleration is called the weight of the object, and from Newton's second law, it has the value mg.
Explanation:
<u>Answer:</u>
Work done done by a system on its environment is W=40 Joules
<u>Explanation:</u>
<u>Given:</u>
Ideal gas is maintained at a constant pressure 
Change in Volume 
<u>To find:</u>
Work done by a system during an Isobaric Process
<u>Solution:</u>
In a Isobaric Process, constant pressure is maintained, 
According to the formula,
work done 
Substitute the values of pressure and change in volume in the above formula,


<u>Result:</u>
Work done done by a system W= -40 Joules
Copper, gold and silver are three of them.
A scalar quantity is one in which there is no direction given.
30 Lbs would be the answer, since there is no indicator of direction.