neither, a shadow cant be darker unless your closer to the surface your pointing the light at.
Answer:
Half-life units in 'years' & 'seconds' are the most widely used, but actually, whatever you wish ... sec, min, hrs, days, yrs. The application and one's preference could dictate more appropriate units.
Explanation:
For the rest 3 km
Bholu need to run in 5 minutes so
He need to 3 × 1000 / 5 × 60 m/s
3000/ 300 = 10 m/s
So , his speed should be 1 m/s to reach in 5 minute
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Power is current times voltage. Using Ohm's Law V=IR, we can express power in two additional ways:

So for P=75W, we can use either of these to get R. Let's use the first one:
Explanation:
It is given that,
Object distance, u = -3.75 cm (negative always)
Focal length, f = +4 cm
We need to find the angular magnification of the lens. Firstly, we will find the image distance using lens formula as :



v = -60 cm
Angular magnification is as the ratio of image distance to the object distance i.e.


m = +16
So, the angular magnification of the insect is 16. Hence, this is the required solution.