60mph= 26.8224 m/s
accelerationn= final velocity-initial velocity/time
It is a reflecting telescope and a compound microscope. I know this for sure
Answer:
53.06 ohm
Explanation:
We have given the rms voltage V =140 V
And the rms current i=31 mA
So the impedance 
Resistance is given as R = 3 kohm
And capacitive reactance 
We know that 
Squaring both side 
The power the swimmer must provide to overcome that drag force is 50 W.
<h3>What is work done?</h3>
Work done is equal to product of force applied and distance moved.
Work = Force x Distance
Given is an athlete, swimming at a constant speed, covers a distance of 203 m in a time period of 5 minutes and 50 seconds = 350 seconds. The drag force exerted by the water on the swimmer is 86.0 N.
Work done by drag force is W= F x d
So, W = 86 N x 203 m
W = 17.458 kJ
Power , a swimmer is provided P = Work done/ Time
P = 17458 / 350
P = 50 W
Thus, the power, the swimmer must provide to overcome that drag force is 50 W.
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