The spacecraft that really gave scientists their first good close-up look at the planet Mercury was:
1 answer:
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Answer:
The speed of the cyclist is 2.75 km/min.
Explanation:
Given
- The distance d = 88 km
- Time t = 32 minutes
To determine
We need to find the speed of a cyclist.
In order to determine the speed of a cyclist, all we need to do is to divide the distance covered by a cyclist by the time taken to cover the distance.
Using the formula involving speed, time, and distance
where
- s = speed
- d = distance covered
- t = time taken
substitute d = 88, and t = 32 in the formula
Cancel the common factor 8
km/min
Therefore, the speed of the cyclist is 2.75 km/min.
Power dissipated across any resistance is given by
now it is given that when one resistance of value 3 ohm connected the power dissipated is 4 Watt
now another identical resistance of same value is connected then the current will reduce to half of its initial value.
now power across any one resistance is given by
So now we will have
So now the power will become 1/4 times of initial power
So now the power will be