1) The area of a circle is given by

where r is the radius of the circle. In this problem, we are told that the area is

so we can rearrange the previous equation to calculate the radius:

And now we can find the circumference, by using the formula:

Therefore, the correct answer is D. 75.3984 meters.
2) The volume of a cube is given by:

where L is the length of the edge. In this problem, L=6 cm, therefore the volume of the cube is

and so, the correct answer is A. 216 cu. cm.
Answer: Im pretty sure the answer is (C): Energy in motion
Explanation: I don't think it's (A) matter being transferred from way place to another because a wave can "Die off" Before even hitting shore. And (B) a force being applied over a distance would be like pushing a box over a line three feet away. Good Luck hope it is correct and that it helps :)
No because an eraser is made of rubber, an insulator, which means that it would stop the flow of electricity, while a safety pin is made of metal, a conductor, which conducts the flow of electricity.
Answer: 10 m/s^2
Explanation:
1) The second law of Newton gives the definition and formula to calculate the net force:
Net force acting on an object = mass * acceleration.
2) From that, when you know the net force acting of the object and its mass, you can solve for the acceleration:
acceleration = Net force / mass
acceleration = 50 N / 5 kg = 10 m/s^2, which is the answer.