Answer:
3 * 10³J/s
Explanation:
Given :
Force applied, F = 300 N
Distance, d = 30 m
Time, t = 3 seconds
Power, P = Workdone / time
Recall :
Workdone = Force * distance
Workdone = 300 N * 30 m = 9000 Nm
Workdone = 9 * 10³ J
Power = (9 * 10³ J) / 3s
Power = 3 * 10³J/s
The answer is D
Sound moves like a ripple in a puddle. A circular motion
Thank you Magic school bus! XD
- <em>length </em><em>=</em><em><u>meters</u></em>
- <em>power </em><em>=</em><em> </em><em><u>watt</u></em>
- <em>force </em><em>=</em><em> </em><em><u>Newton</u></em>
- <em>Energy </em><em>=</em><em> </em><em><u>calorie</u></em>
- <em>Temperature </em><em>=</em><em> </em><em><u>celcius </u></em><em><u>scale</u></em>
<em><u>hope </u></em><em><u>it</u></em><em><u> helps</u></em>
<em><u>correct</u></em><em><u> me</u></em><em><u> if</u></em><em><u> </u></em><em><u>I'm</u></em><em><u> </u></em><em><u>wrong</u></em>
Because the output is usually the divided side of the machine
Answer:
650.65 K or 377.5°C
Explanation:
Area = A = 10 m²
Thickness of wall = L = 2.5 cm = 2.5×10⁻² m
Inner surface temperature of wall = = 415°C = 688.15 K
Outer surface temperature of wall =
Heat loss through the wall = 3 kW = 3×10³ W
Thermal conductivity of wall = k = 0.2 W/m K
Assumptions made here as follows
- There is not heat generation in the wall itself
- The heat conduction is one dimensional
- Heat flow follows steady state
- The material has same properties in all directions i.e., it is homogeneous.
Considering the above assumptions we use the following formula
∴ The temperature of the outer surface of the wall is 650.65 K or 377.5°C