**Answer:**

125.83672 seconds

**Explanation:**

P = Power of the horse = 1 hp = 746 W (as it is not given we have assumed the horse has the power of 1 hp)

m = Mass of professor = 103 kg

g = Acceleration due to gravity = 9.8 m/s²

h = Height of professor = 93 m

Work done would be equal to the potential energy

Power is given by

**The time taken by the horse to pull the professor is 125.83672 seconds**

**Answer:14 m**

**Explanation:**

Given

Vertical jump make by the dolphin is given by

Suppose the dolphin jump with an initial velocity of

so u is given by

If dolphin launches at an angle then maximum horizontal range is given by

assuming the of Dolphin to be Projectile so range is given by

substitute the value of

Range will be maximum for

thus

The nucleus is the center of the atom made up of protons and neutrons with an overall positive charge. this is where the majority of the atom's mass is.

the electron cloud is the energy levels filled with electrons orbiting the nucleus, there is hardly any mass and it has an overall negative charge equal to that of the nucleus it is orbiting if it is part of a neutral atom.

Constructive interference happens when this condition is satisfied:

This means that the difference in the distance traveled by the waves, from the slit to the screen, is equal to the whole multiple of the wavelength.

If we say that the distance between two interference fringes is much smaller than the distance from the slit to the screen, we can use the following approximation:

Finally for the bright spots we have:

The spacing between bright spots is: