<h3><u>Answer;</u></h3>
<em>Electric motor</em>
<h3><u>Explanation;</u></h3>
- <em><u>Energy</u></em> is the ability to do work. According to the law of conservation of energy,<em><u> energy can not be created nor destroyed but can be changed from one form to another</u></em>.
- Changing energy from one form to another is done by devices we call <em><u>transducers. These are elements that convert energy from one form to another.</u></em>
- In this case, electrical motor is an example of a transducer that converts electrical energy to kinetic energy. <em><u>Electrical energy is supplied to a the motor which converts it to rotational energy or mechanical energy then to kinetic energy.</u></em>
Explanation:
potential energy = mass × gravity force × height
=20 × 10 × 25
= 5000 joules
The contrast between total internal reflection and refraction is that total internal reflection is the full underwater build with no defeat of brightness, whereas refraction is the shift in the path of a tide that is parting from one medium to another.
Answer:
n = 2 children
Explanation:
Given
M = 88 Kg
D = 1.8 m ⇒ R = D/2 = 1.8 m/2 = 0.9 m
m = 22 Kg
n = ?
We apply the formula
Icm = M*R²/2
⇒ Icm = (88 Kg)*(0.9 m)²/2 = 35.64 Kg*m²
If
I = 2*Icm = 2*35.64 Kg*m² = 71.28 Kg*m²
we apply Steiner's Theorem as follows
I = Icm + n*m*R²
⇒ n = (I - Icm) / (m*R²)
⇒ n = (71.28 Kg*m² - 35.64 Kg*m²) / (22 Kg*(0.9 m)²)
⇒ n = 2 children
