Observation: You saw/ observed something and you are stating that.
Inference: You are predicting something to be true. If so and so, then this will occur.
<span>65W * 8h * 3600s/h = 1.9e6 J = 447 Cal </span>
Incomplete question.The complete question is attached below as screenshot along with figure
Answer:
![F=6.00*10^{-6}N](https://tex.z-dn.net/?f=F%3D6.00%2A10%5E%7B-6%7DN)
Force is repulsive
Explanation:
Given data
Current I₁=5.00A
Current I₂=2.00A
Length L=1.20 m
Radius r=0.400m
To find
Force F
Solution
As the force is repulsive because currents are in opposite direction
From repulsive force we know that:
![F=\frac{u_{o}I_{1}I_{2}L}{2\pi r}](https://tex.z-dn.net/?f=F%3D%5Cfrac%7Bu_%7Bo%7DI_%7B1%7DI_%7B2%7DL%7D%7B2%5Cpi%20r%7D)
Substitute the given values
Material b has highest heat
Explanation:
a) photovoltaic cell is a semiconductor device and it converts light energy to electrical energy
b) burning of coal converts chemical energy to heat energy
c) rubbing of both hands against each other converts mechanical to heat energy