**Answer: **Protons

**Explanation: **The atomic number is the number of protons that are in the nucleus of an atom. Each element on the periodic table is defined by the number of protons. In other words, the protons/atomic number determines what element it is. Protons carry a positive charge.

**Answer: vf = 32 m/s**

**Explanation: Solution:**

Use the formula for acceleration:

a = vf - vi / t

initial velocity vi = 0 since it is at rest.

derive to find vf:

vf = at + vi

= 8.0 m/s² ( 4.0 s ) + 0 m/s

= 32 m/s

**Answer:**

**I = 0.287 MR²**

**Explanation:**

given,

height of the object = 3.5 m

initial velocity = 0 m/s

final velocity = 7.3 m/s

moment of inertia = ?

Using total conservation of mechanical energy

change in potential energy will be equal to change in KE (rotational) and KE(transnational)

PE = KE(transnational) + KE (rotational)

v = r ω

**I = 0.287 MR²**

<span>Rutherford felt that the atom had an internal structure much like our solar system, with a nucleus surrounded by orbiting electrons. Today, we know that the electrons inhabit specific shells and sub-shells, and there is an order to which these electrons are located.</span>

<span>The answer is:
PE lost every second = mgh = 1.2x10^6 * 9.81 * 50 = 5.89x10^8J
So, Power = 5.89x10^8W</span>