The drag coefficient for a newly designed hybrid car is predicted to be 0.21. the cross-sectional area of the car is 30 ft2. det
1 answer:
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The cyclist is moving by uniformly accelerated motion, with an initial velocity of 
and an acceleration of 
.
The acceleration is given by
where
is the final velocity and 
is the time between the end and the beginning of the motion, and in our case it is 1.75 s. Therefore, from this relationship we can find the final velocity:
The acceleration is given by
where
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
Learn more about resistance:
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