The resistance of the sample is
Explanation:
The relationship between resistance of a material and temperature is given by the equation
where
is the resistance at the temperature
is the temperature coefficient of resistance
For the sample of nickel in this problem, we have:
when the temperature is
While the temperature coefficient of resistance of nickel is
Therefore, the resistance of the sample when its temperature is
is
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Answer:
θ = 20.9 rad
Explanation:
In a blender after a short period of acceleration the blade is kept at a constant angular velocity, for which we can use the relationship
w = θ / t
θ = w t
if we know the value of the angular velocity we can find the angular position, we must remember that all the angles must be in radians
suppose that the angular velocity is w = 10 rpm, let us reduce to the SI system
w = 10 rpm
= 1,047 rads
let's calculate
θ = 1,047 20
θ = 20.9 rad
The correct expression for the maximum speed of the object during its motion is .
The maximum speed of the object is determined using the following formulas;
v(max) = Aω
where;
The maximum speed of the object can also be obtained from the maximum net force on the object,
F = ma
where;
F = m(v/t)
mv = Ft
v = Ft/m
Thus, the correct expression for the maximum speed of the object during its motion is .
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