It would be D. it isn't harmful to anyone unless you are actually unable to do it but if an elderly person is strong enough then sure they can weight lift. And it isn't harmful to adolescents really (unless they drop it on their foot or are too weak or something but that has nothing to do with weight lifting itself... I think I'm getting sidetracked) Anyways if you can weight lift then yes anyone can benefit from it. I hope this helps!
Answer:
Explanation:
The magnitude of the magnetic field produced by a current-carrying wire is given by the equation:
where:
is the vaacuum permeability
I is the current in the wire
r is the distance from the wire
The direction of the magnetic field lines is tangential to concentric circles around the wire.
In this problem, we have:
is the current in the wire
is the distance from the wire
Solving for B, we find the magnitude of the magnetic field:
The answer to this question is A. As the gas gets hotter, the molecules gain energy and move farther apart, causing the gas to expand. This is because, whenever you heat a substance, (solid, liquid, or gas), the molecules in the substance will always move more rapidly causing the substance to expand and the molecules to move further away from one another.
Answer:
5 is 4400 (2 hours), 6600 (3 hours), 1100 (5 hours)
Explanation:
In the first scenario, upon reaching equilibrium
mg = kx
135 = k(0.21) [Converted x in SI units]
k = 135/(0.21)
Similarly, in the second scenario, upon reaching equilibrium
mg = kx
mg = [(135)(.449)]/(0.21)
mg = weight of the electronic equipment = 289 N(approx)
