Answer:
The scope of physics is quite vast and covers an enormous range of magnitude of physical quantities like mass, length, time, energy etc.
The scope is divided into two sections, where on one side it studies about phenomena at a very small microscopic level involving and analyzing electrons, protons, and neutrons.
Answer:
c(t)= 40t
Explanation:
As it forms the right angle triangle. see attachment for the figure.
We will use Pythagoras theorem i.e
a² + b² = c²
where,
'a' is perpendicular
'b' is base
'c' is hypotenuse i.e the distance D between the ships in terms of the time 't'
the distance 'a' from the starting point is 24t
the distance 'b' from the starting point is 32t
therefore,
(24t)²+ (32t)² = c(t)²
c(t)= √(24t)²+ (32t)²
c(t)= √576t² + 1024t²
c(t)=√ 1600t²
c(t)= 40t
Thus, function that models the distance D between the ships in terms of the time t (in hours) elapsed since their departure is 40t
Hi, the answer is C. (chemical potential energy)
<span>Ocean Waves . . . . . the water in the ocean
Earthquake Waves . . . the rock and everything else that the Earth is made of
Sound waves from a speaker . . . the air in the room
</span>
Elements in group 2 are called alkaline earth metals, the most similarity about the alkaline metals is which chemical properties they have.
<h2>Further Explanation
</h2><h3>Periodic table </h3>
- Periodic table is a table that contains elements arranged in columns called groups and rows called periods.
- Elements are arranged based on physical and chemical properties such that elements in the same group will have similar physical and chemical properties.
<h3>Chemical families </h3>
- Based on the chemical properties elements belong to a family of elements sharing similar chemical or physical characteristics.
- Examples of common chemical families include; alkali metals, alkaline-earth metals, halogens and noble gases among others.
<h3>Alkaline-earth metals </h3>
- These are elements that are found in group 2 of the periodic table. Alkaline-earth metals include, Beryllium, Magnesium, Calcium, Strontium, Barium, and Radium.
Properties of Alkaline-earth metals
- Alkaline earth metals have a valence of two since they form ions by losing two electrons from their outermost energy levels.
- Unlike the Alkali metals, the earth metals have a smaller atom size and are not as reactive compared to alkali metals.
- Alkaline-earth metals are highly metallic and are good conductors of electricity.
- They react with water and steam to form metal hydroxide and metal oxides respectively
- They react with air to form metal oxides
- Reactivity of alkaline metals depends on the ease of losing electrons, thus the reactivity increases down the group as the number of energy levels increases.
- Additionally, alkaline-earth metals have low electronegativities and low electron affinities
Keywords: Chemical families, alkaline-earth metals, reactivity
<h3>Learn more about: </h3>
Level: High school
Subject: Chemistry
Topic: Periodic table and chemical families
Sub-topic: Alkaline-earth metals