Answer:
surface temperature of the chip located 120 mm Ts=42.5°C
surface temperature of the chip in Mexico Ts=46.9°C
Explanation:
from the energy balance equation we have to:
q=E=30W
from Newton´s law:
Ts=Tα+(q/(h*A)), where A=l^2
N=h/k=0.04*(Vl/V)^0.85*Pr^1/3
data given:
l=0.12 m
v=10 m/s
k=0.0269 W/(m*K)
Pr=0.703
Replacing:
h=0.04*(0.0269/0.12)*(10*0.12)/((16*69x10^-6))^0.85*(0.703^1/3) = 107 W/m^2*K
The surface temperature at sea level is equal to:
Ts=25+(30x10^-3/107*0.004^2)=42.5°C
h=0.04*(0.0269/0.12)*((10*0.12)/(21*81x10^-6))^0.85*(0.705^1/3)=85.32 W/(m*K)
the surface temperature at Mexico City is equal to:
Ts=25+(30x10^-3/85.32*0.004^2)=46.9°C
The number of protons in an atom is the same as its atomic number, which is found on its corresponding atomic symbol in the periodic table of elements. And as long as this atom has a neutral charge, than the number of electrons will be the same. If the atom does have a charge, like say, 2-, then subtract 2 from the number of protons to get the number of electrons.
For the number of neutrons, you have to memorize the isotopes available sometimes. But usually something like carbon 14 will have a total of (in this case) 14 total protons/neutrons. So subtract this number by the number of protons(6), and you have 8 neutrons.
Hope this helps!
<h2>Answer: The mass will remain the same, but the weight will change
</h2>
Let's start by explaining that mass and weight are very different concepts.
Mass
is the amount of matter that exists in a body, which only depends on the quantity and type of particles within it. This means mass is an intrinsic property of each body and <u>remains the same regardless of where the body is located. </u>
On the other hand, weight
is a measure of the gravitational force acting on an object and is directly proportional to the product of the mass
of the body by the acceleration of gravity
:
Then, since the Earth and the Moon have different values of gravity, the weight of an object in each place will vary, but its mass will not.