Why do objects that lie half in and half out of water appear distorted?

Answer:

The image behind the mirror is called a virtual image because it cannot be projected onto a screen—the rays only appear to originate from a common point behind the mirror. If you walk behind the mirror, you cannot see the image, because the rays do not go there

Answer:

(a) 441 W (b) 0.59 hP

Explanation:

Given that,

Mass of a woman, m = 60 kg

Height of a staircase, h = 15 m

Time, t = 20 s

(a) We need to find the power she expend. Work done per unit time is called power. It is given by :

( b) Since, 1 hP = 745.7 W

P = 0.59 hP

Answer:

The terminal voltage will be 5.99 volt.

(d) is correct option.

Explanation:

Given that,

Voltage = 6.00

Internal r= 0.8322 ohm

Total resistance R =7380 ohm

We need to calculate the current

Using current formula

Put the value into the formula

We need to calculate the voltage drop due to internal resistance

Now, The terminal voltage will be

Hence, The terminal voltage will be 5.99 volt,

<em>optical</em><em> </em><em>fibre</em>