Iron oxide reacts with aluminum to give aluminum oxide and iron. What kind of chemical reaction is this?
1 answer:
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As per the question there are two ohmic devices.
The first ohmic device is a good conductor and the second one is a good insulator.
As per Ohm's law the current flowing through a conductor is directly proportional to the potential difference maintained across the two ends of a conductor at constant temperature and pressure. If V is the potential and I is the current flow through these Ohmic devices,then mathematically it can be written as-
V∝ I [ at constant temperature and pressure]
⇒V= IR
Here R is the proportionality constant called resistance of the material.
Hence the resistance R is calculated as -
Now a graph is plotted taking potential V on X-axis and current I along Y- axis.
The graph will be a straight line for conductor and will be a curve depending on the type of insulator.
The slope of this graph will give the resistance of the material.
An insulator is a substance through which current flow is very low as its resistance is very high.Hence the slope of the V-I curve is very large.
A conductor is that substance through which current is flown easily as the resistance of conductor is very low.Hence the slope of V-I curve is smaller,
Answer:
nothing, mass is not affected by gravitational force
Explanation:
Weight is the gravitational force a planet exerts on a mass on the surface.
It is the product of the mass of an object with the gravitational acceleration that the planet produces.
The weight is the gravitational force
where,
m = Mass of the object
g = Acceleration due to gravity = 9.81 m/s²
Mass is the property that matter has which opposes the force being applied to it. It is intrinsic to the object itself and does not change according to the gravitational force. But, the weight changes.