Answer:
The mother has to sit 2.17 ft from the center on the other side of the seesaw.
Explanation:
We are trying to find the sum of torques given by the weights of mother and daughter to be zero.
If the torque of the daughter on one side of the pivoting point is given by:
5.5 ft x 63.5 lb x g = 349.25 g ft lb
we need that the absolute value of the torque exerted by the mom (160.9 lb) to be the same in magnitude (and of course opposite direction). So we assume that "d" is the distance at which the mother locates to make this torque equal in magnitude to her daughter's torque:
d x 160.9 lb x g = 349.25 g ft lb
d = 2.17 ft
Answer:
The greater the luminosity of a star, the longer its period of oscillation.
Radio, microwaves, infrared, and visible light are all used for communications.
Yes white is a good absorbent
Answer:
Explanation:
You can nuke your breakfast with microwaves. That is really not possible with light waves but distance is involved here or radio waves. B and C are not true. D is a little troublesome. Infrared rays do not have more energy than microwaves but they do have energy.
A is the answer.