Answer:
The maximum temperature is 90.06° C
Explanation:
Given that
t= 0.1 mm
Heat generation
![q_g=0.3\ MW/m^3](https://tex.z-dn.net/?f=q_g%3D0.3%5C%20MW%2Fm%5E3)
Heat transfer coefficient
![h=500\ W/m^2K](https://tex.z-dn.net/?f=h%3D500%5C%20W%2Fm%5E2K)
Here one side(left side) of the wall is insulated so the all heat will goes in to right side .
The maximum temperature will at the left side.
Lets take maximum temperature is T
Total heat flux ,q
![q=q_g\times t](https://tex.z-dn.net/?f=q%3Dq_g%5Ctimes%20t)
![q=0.3\times 1000000\times 0.1 \times 10^{-3}\ W/m^2](https://tex.z-dn.net/?f=q%3D0.3%5Ctimes%201000000%5Ctimes%200.1%20%5Ctimes%2010%5E%7B-3%7D%5C%20W%2Fm%5E2)
![q=30\ W/m^2](https://tex.z-dn.net/?f=q%3D30%5C%20W%2Fm%5E2)
So the total thermal resistance per unit area
![R=\dfrac{t}{K}+\dfrac{1}{h}](https://tex.z-dn.net/?f=R%3D%5Cdfrac%7Bt%7D%7BK%7D%2B%5Cdfrac%7B1%7D%7Bh%7D)
![R=\dfrac{0.1\times 10^{-3}}{25}+\dfrac{1}{500}](https://tex.z-dn.net/?f=R%3D%5Cdfrac%7B0.1%5Ctimes%2010%5E%7B-3%7D%7D%7B25%7D%2B%5Cdfrac%7B1%7D%7B500%7D)
R=0.002 K/W
We know that
q=ΔT/R
30=(T-90)/0.002
T=90.06° C
The maximum temperature is 90.06° C
Answer: Red Bull’s can fly lol
Explanation: white cows can’t
Answer:
Large shovels
Explanation:
If you are wondering specifically when to use long handled shovels, they are better for tree planting and other hole-digging. Long shovel handles can reach deep into a hole. And you'll get better leverage, which is easier on your back. The lighter the shovel, the easier time you will have digging.
Answer:
Newton's Second Law of Motion says that acceleration (gaining speed) happens when a force acts on a mass (object). Riding your bicycle is a good example of this law of motion at work. Your bicycle is the mass. Your leg muscles pushing pushing on the pedals of your bicycle is the force.Newton's Second Law also says that the greater the mass of the object being accelerated, the greater the amount of force needed to accelerate the object. Say you have two identical bicycles that each have a basket. One bicycle has an empty basket. One bicycle has a basket full of bricks. If you try to ride each bicycle and you push on the pedals with the exact same strength, you will be able to accelerate the bike with the empty basket MORE than the bike with the basket full of bricks. The bricks add mass to the second bicycle. With bricks in the basket, you would have to apply more force to the pedals to make the bicycle with bricks in the basket move.
Explanation:
Answer:
2.04m/s²
Explanation:
Complete Question
<em>A stationary 10 kg object is located on a table near the surface of the earth. The coefficient of kinetic friction between the surfaces is 0.2. A horizontal force of 40 N is applied to the object. Find the acceleration of the object.</em>
<em />
According to Newtons second law;
\sum F_x = ma_x
F_m - F_f = ma_x
Fm is the applied force
Ff is the frictional force
m is the mass
a is the acceleration
Substitute the given values
40N - nmg = 10a
40 - 0.2(10)(9.8) = 10a
40 - 19.6 = 10a
20.4 = 10a
a = 20.4/10
a = 2.04m/s²
<em>Hence the acceleration of the object is 2.04m/s²</em>