Answer:
physical property
Explanation: Some substances exist as gases at room temperature (oxygen and carbon dioxide), while others, like water and mercury metal, exist as liquids.
Wherever a river loses energy
Answer:
24.07415 rpm
Explanation:
= Coefficient of friction = 0.63
v = Velocity
d = Diameter = 4.9 m
r = Radius =
m = Mass
g = Acceleration due to gravity = 9.81 m/s²
Here the frictional force balances the rider's weight
The centripetal force balances the weight of the person
Velocity is given by
Converting to rpm
The minimum angular speed for which the ride is safe is 24.07415 rpm
For this problem, we use the Coulomb's Law whose equation is written as
F = kQ₁Q₂/d²
where
F is the electric force
k is the Coulomb's constant equal to 8.98755×10⁹ N·m²/c²
Q₁ and Q₂ are two charges
d is the distance between two charges
First, let's compute the force between the two positive charges denotes as F₁.
F₁ = (8.98755×10⁹ N·m²/c²)(+53×10⁻⁶ C)(+53×10⁻⁶ C)/(35 cm * 1 m/100cm)²
F₁ = 206.09 N
Next, let's compute the force between the positive and the negative charges denotes as F₂.
F₂ = (8.98755×10⁹ N·m²/c²)(+53×10⁻⁶ C)(-53×10⁻⁶ C)/(35 cm * 1 m/100cm)²
F₂ = -206.09 N
The net force is the sum of the two forces.
Net Force = 206.09 - 206.09 = 0
Therefore, the net force experienced by the positive charge is zero.
Answer:
Insulator
Explanation:
A body that has relatively few free electrons and offers comparatively great resistance to the movement of free electrons is an <u>INSULATOR</u>.
An insulator is a body that offers resistance to free flow of electrons. Insulators do not allow the passage of electric current. Examples of Insulators are glass, plastic, rubber, dry wood, paper, etc. The opposite of an insulator is a conductor. A conductor is body that allows free flow of electrons. Conductors allow the passage of electric current. Metals are the most common example of conductors such as copper, aluminum, gold, and silver. Other examples of conductors include grahite and human body.