Answer:
The element H (Hydrogen) has an atomic number of 1.
Answer:
Compared to protectionism an opposing goal of economic foreign policy is free trade. Free trade is the opposite of protectionism. Free trade welcomes the exchange of products and services among countries, eliminating or reducing the imports and exports tariffs, and eliminating special tariffs to the products.
Answer:
each resistor is 540 Ω
Explanation:
Let's assign the letter R to the resistance of the three resistors involved in this problem. So, to start with, the three resistors are placed in parallel, which results in an equivalent resistance
defined by the formula:
![\frac{1}{R_e}=\frac{1}{R} } +\frac{1}{R} } +\frac{1}{R} \\\frac{1}{R_e}=\frac{3}{R} \\R_e=\frac{R}{3}](https://tex.z-dn.net/?f=%5Cfrac%7B1%7D%7BR_e%7D%3D%5Cfrac%7B1%7D%7BR%7D%20%7D%20%2B%5Cfrac%7B1%7D%7BR%7D%20%7D%20%2B%5Cfrac%7B1%7D%7BR%7D%20%5C%5C%5Cfrac%7B1%7D%7BR_e%7D%3D%5Cfrac%7B3%7D%7BR%7D%20%5C%5CR_e%3D%5Cfrac%7BR%7D%7B3%7D)
Therefore, R/3 is the equivalent resistance of the initial circuit.
In the second circuit, two of the resistors are in parallel, so they are equivalent to:
![\frac{1}{R'_e}=\frac{1}{R} +\frac{1}{R}\\\frac{1}{R'_e}=\frac{2}{R} \\R'_e=\frac{R}{2} \\](https://tex.z-dn.net/?f=%5Cfrac%7B1%7D%7BR%27_e%7D%3D%5Cfrac%7B1%7D%7BR%7D%20%2B%5Cfrac%7B1%7D%7BR%7D%5C%5C%5Cfrac%7B1%7D%7BR%27_e%7D%3D%5Cfrac%7B2%7D%7BR%7D%20%5C%5CR%27_e%3D%5Cfrac%7BR%7D%7B2%7D%20%5C%5C)
and when this is combined with the third resistor in series, the equivalent resistance (
) of this new circuit becomes the addition of the above calculated resistance plus the resistor R (because these are connected in series):
![R''_e=R'_e+R\\R''_e=\frac{R}{2} +R\\R''_e=\frac{3R}{2}](https://tex.z-dn.net/?f=R%27%27_e%3DR%27_e%2BR%5C%5CR%27%27_e%3D%5Cfrac%7BR%7D%7B2%7D%20%2BR%5C%5CR%27%27_e%3D%5Cfrac%7B3R%7D%7B2%7D)
The problem states that the difference between the equivalent resistances in both circuits is given by:
![R''_e=R_e+630 \,\Omega](https://tex.z-dn.net/?f=R%27%27_e%3DR_e%2B630%20%5C%2C%5COmega)
so, we can replace our found values for the equivalent resistors (which are both in terms of R) and solve for R in this last equation:
![\frac{3R}{2} =\frac{R}{3} +630\,\Omega\\\frac{3R}{2} -\frac{R}{3} = 630\,\Omega\\\frac{7R}{6} = 630\,\Omega\\\\R=\frac{6}{7} *630\,\Omega\\R=540\,\Omega](https://tex.z-dn.net/?f=%5Cfrac%7B3R%7D%7B2%7D%20%3D%5Cfrac%7BR%7D%7B3%7D%20%2B630%5C%2C%5COmega%5C%5C%5Cfrac%7B3R%7D%7B2%7D%20-%5Cfrac%7BR%7D%7B3%7D%20%3D%20630%5C%2C%5COmega%5C%5C%5Cfrac%7B7R%7D%7B6%7D%20%3D%20630%5C%2C%5COmega%5C%5C%5C%5CR%3D%5Cfrac%7B6%7D%7B7%7D%20%2A630%5C%2C%5COmega%5C%5CR%3D540%5C%2C%5COmega)
Acceleration is the change in speed over a change in time.
Answer:
Explanation:
There could be. Not much of the artificial sweeteners are used in the diet colas. (This is measured in mg, which is gram broken down into thousands).
On the other hand a 355 red can of coke has a about 9 grams of sugar in it. That is a great deal. It may make the can of "natural coke" heavier enough to make a difference in it's buoyancy. It could allow the natural coke to sink a bit below the surface.
It is an ideal test for a science fair project for a student in the middle grades.