Answer:
The standard unit used to measure energy and work done in physics is the joule, which has the symbol J. In mechanics, 1 joule is the energy transferred when a force of 1 Newton is applied to an object and moves it through a distance of 1 meter. Another unit of energy you may have come across is the Calorie.
Explanation:
Answer:
I'm guessing it's a diploma.
Answer:
A) 30 cm
B) 20 cm
Explanation:
For the perimeter of rectangle B, I just imagined there was a cut horizontally through the middle. The length would be 5, since its half, and the width would be the same (10) because folding it into a rectangle only changes its length.
I added it up : 5+5+10+10= 30 cm
Rectangle B is 30 cm
For the perimeter of square C, you folded it again to make the width decrease by 5cm , so all the sides were 5cm.
5+5+5+5=20 cm
Square C is 20 cm
