Answer:
Explanation:
Let's use Ohm's law:
or
(1)
Where:
We know the value of the voltage V, so we need to find the value of R in order to find I. Fortunately there is a relation between the resistivity of a conductor and its electrical resistance given by:
(2)
Where:
Keep in mind that the electrical resistivity of the gold is a known constant which is 
and the cross sectional area of the conductor is calculated as:
Because we have a wire in this case, so we assume a cylindrical geometry.
Now replacing our data in (2)
Finally, we know R and V, so replacing these values in (1) we will be able to find the current:
Answer:
ρ = M / V = 2 g / .5 cm^3 = 4 g/cm^3
Answer:
Polar areas
Explanation:
From what I know Arctic, Antarctic, and polar air masses are cold. Polar (cold), Arctic (very cold), Equatorial (warm and very moist), and Tropical (warm).
- With the options you gave, you can immeditaly elimate 1. tropical areas and 2. an area where its summertime.
- Your then left with two options 1. an area where its wintertime and 2. polar areas
I then concluded that cold air masses tend to originate from POLAR AREAS.
Answer:
Final volume = 0.42 cubic meters
Explanation:
The question is incomplete. The initial conditions are
Initial temperature ,
= 310 K
Initial volume ,
= 0.5 cubic meter
Number of moles = 2.5
Since, from the ideal gas equation we get,
PV = nRT
P 
= 12886.7 Pa
Final pressure= 15464.04 Pa
Since temperature is constant,
PV = constant
V = 0.42 cubic meters.
Hence final volume = 0.42 cubic meters
<span>Which of the following is the correct unit for time when calculating power in watts?
</span>
The correct unit for time when calculating power in watts is seconds. The answer is letter D. The rest of the choices do not answer the question above.
