Answer:
Explanation:
A ) Index of refraction = real depth / apparent depth
real depth = 7.8 cm ; Index of refraction = 1.33
1.33 = 7.8 /apparent depth
apparent depth = 7.8 / 1.33
= 5.86 cm
B )
Distance of fish fro mirror = 20.6 - 7.8 = 12.8 cm
Image will be formed 12.8 cm behind the mirror.
Distance of image from the water surface = 20.6 +12.8
= 33.4 cm
Real depth of image = 33.4
Apparent depth of image = 33.4 / 1.33
= 25.11 cm
Answer:
The work done is 13.875 J.
Explanation:
Given that,
Mass of ball = 0.25 kg
Initial speed = 20 m/s
Final speed = 17 m/s
We need to calculate the work done
Using formula of work done
Work done by the friction
Negative sign shows the friction always against displacement.
Hence, The work done is 13.875 J.
Explanation:
wave is a disturbance that carries energy from one particle to another particle. The speed depends on:
1. The type of medium
2. The temperature of the medium
3. The energy of the wave
4. The amplitude of the wave
Explanation:
Given that,
The distance between two conducting plates is 7 cm.
The difference in potential between the plates is 560 V.
To find,
We need to tell is the positive or the negative plate at the higher potential?
Solution,
We know that the electric potential is defined as the work done in moving a test charge from one position to another. So, the positive plate is always at the higher potential.
Hence, this is the required solution.
Relax. Everything's under control.
If you use up all your exclamation points now, then
you won't have any left when you really need one.
(1.4 x 10⁵ newton/coulomb) x (-1.6 x 10⁻¹⁹ coulomb)
= (1.4 x 10⁵ x -1.6 x 10⁻¹⁹) newton-coulomb/coulomb
= - (1.4 x 1.6) x 10⁵⁻¹⁹ newton
= - 2.24 x 10⁻¹⁴ newton