It’s 180 m/s^2 dude. I think I have you in my class lol.
r = 30m
v = 2.5 m/s
m = .02kg
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v = r*omega
omega = (delta thaeda)/(delta time)
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2.5 m/s = 30m*omega
.08333... = omega
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*note, omega stands for angular velocity
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Also, it's been a while since I've done a physics problem like this so I could be wrong. I think this is the answer though :)
Answer: It is not gold. The density is 1.25 g/cm3, very little compared with gold.
Explanation:
According to Archimedes’ principle, any body submerged in a liquid, receives an upward force, called buoyant force, which magnitude is equal to the weight of the liquid that displaces.
This weight can be calcultated as follows:
Fb= δH2O . Vbody g
We are told that the volume of the liquid displaced (equal to the volume of the body as it is completely submerged in water) is 400 cm3.
If we know that the mass of the bracelet is 0.5 Kg, we can find out the density of the material, just applying the same relationship between mass, density and volume:
m = δbracelet. V
δbracelet = m / V = 500 g / 400 cm3= 1.25 g/cm3
As the gold density is approximately 19.3 g/cm3, it is clear that the bracelet is not made from gold, but from something less dense.
She should draw the filed lines as such;
C) Away from positive charge and toward the negative charge
