Scientists measure the time between the arrival of an earthquake's _______ and _______ waves to help determine the distance betw
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Answer:
Explanation:
Let the charge on bead A be q nC and the charge on bead B be 28nC - qnC
Force F between them
4.8\times10^{-4} =
=120 x 10⁻⁸ = 9 x q(28 - q ) x 10⁻⁹
133.33 = 28q - q²
q²- 28q +133.33 = 0
It is a quadratic equation , which has two solution
q_A = 21.91 x 10⁻⁹C or q_B = 6.09 x 10⁻⁹ C
Answer: 5166.347
Explanation:
The specific gravity of a solid (also called relative density) is the ratio of the density of that solid
to the density of water
(normally at
):
(1)
On the other hand, the density of the rock is calculated by:
(2)
Where:
is the mass of the rock
is the volume of the rock, since is spherical
Well, we already know the value of , but we need to find
in order to find the rock's specific gravity; and in order to do this, we firsly have to find
and then calculate
:
In the case of the mass of the rock, we can calclate it by the following equation:
(3)
Where:
is the weight if the rock in mars
is the acceleration due gravity in Mars
Isolating :
(4)
(5)
To find we can use the following equation of the potential gravitational energy
:
(6)
Where:
is the potential energy
is the height at which the rock has the mentioned potential energy
Isolating :
(7)
(8)
(9)
Substituting (9) in (5):
(10)
(11)
Substituting (11) in (2):
(12) At this point we only need to find the volume of the rock, knowing its diameter is
, hence its radius is
(13)
(14)
Substituting (14) in (12):
(15)
(16)
Substituting (16) in (1):
(17)
Finally we obtain the specific gravity of the rock: