Why do scientist use radioactive decay to figure out how old stuff is
1 answer:
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Answer:
atm
Explanation:
The pressure at the bottom of any liquid column is equal to product of density of the liquid , gravitational acceleration constant (g) and height of the water column
Thus,
Substituting the given values, we get -
kg/m3
m/s^2
meters
atm
Answer:
or -0.000250 C
Explanation:
The field points downward, which is the direction of a positive charge. In order for the penny to rise, it has to have a negative charge since its direction is opposite that of the field.
To calculate the magnitude of the charge:
The penny is to accelerate upward so it must overcome gravity. Hence, the net force to cause it to accelerate it upward is the difference between the electrostatic force and its weight.
Now, the electric field intensity is given by
where q = charge
to 3 significant figures.
In standard form, q = The negative sign indicates it has a negative charge, as explained initially.