How do I work out the percentage??
2 answers:
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Answer:
17.6 N
Explanation:
The force exerted by the punter on the football is equal to the rate of change of momentum of the football:
where
is the change in momentum of the football
is the time elapsed
The change in momentum can be written as
where
m = 0.55 kg is the mass of the football
u = 0 is the initial velocity (the ball starts from rest)
v = 8.0 m/s is the final velocity
Combining the two equations and substituting the values, we find the force exerted on the ball:
Answer:
the thermistor temperature =
Explanation:
Given that:
A thermistor is placed in a 100 °C environment and its resistance measured as 20,000 Ω.
i.e Temperature
Resistance of the thermistor 20,000 ohms
Material constant = 3650
Resistance of the thermistor = 500 ohms
Using the equation :
Taking log of both sides
Replacing our values into the above equation :
Thus, the thermistor temperature =