Answer:
far away
Explanation:
There are different types of eye defect ranging from short sightedness, longsighted, astigmatism, presbyopia etc.
If someone is only able to see close ranged object clearly but not far distant object, then such person is suffering from short sightedness or myopia. This occurs when the light rays entering the eye does not converge on the retina. Instead of converging on the retina, the light ray is formed on a point in front of the retina. <em>This causes the distance from the eye's lens to the retina shorter compared to that of a normal eye. </em>This eye defect is usually corrected using concave lens in order to diverge the rays thereby allowing it to focus on the retina.
Hence, if the distance from your eye's lens to the retina is shorter than for a normal eye, you will struggle to see objects that are far away (at a far distant).
Answer:
Explanation:
Given that,
Frequency of a radio antenna is 1 MHz
Power, P = 21 kW
We need to find the the waves intensity 25 km from the antenna
. The object emits intenisty evenly in all direction. It can be given by :
So, the wave intensity 25 km from the antenna is .
Answer:
See explanation.
Explanation:
Immediately after the switch is closed the capacitor, which was initially discharged, has had not enough time to collect any charge; therefore, the charge on the capacitor is zero.
Also, since there is no charge on the capacitor, there is no potential difference (voltage) across the capacitor immediately after the switch is closed.
Going around the circuit gives
where is the current through resistors , , and is the current through .
Now since there is no potential across the capacitor, the current is not divided at the junction; therefore, , which gives
which is the current through immediately after the switch is closed.
Global warming is what will happen