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GarryVolchara [31]
3 years ago
15

Answer the two questions by using the pictures, thanks!

Chemistry
1 answer:
vladimir2022 [97]3 years ago
7 0

Answer:

  • See descriptions below.

Explanation:

<h2>Part A:</h2>

The football was launched by the girl. This is, the girl applied a <em>force </em>over the football and it started to move.

Newton's second law of<em> motion</em> tell us that the <em>net force </em>on an object is proportional to the product of the the mass of the object and the acceleration it acquires.

Then, the force applied by the girl on the football caused it to accelerate: it passed from rest to have some speed.

The same happens to the baseball lauched by the boy. It accelerated due to the force applied by the boy.

The acceleration of each ball can be calculated using Newton's second law of motion:

       a=\dfrac{Net\text{ }Force}{mass}

Thus, if you assume that both the girl and the boy applied the same force to their respective balls, the baseball, which has less mass, would acquired a greater accelaration than the football.

<h2>Part B.</h2>

After the<em> football</em> and<em> baseball leave the students' hands</em>, the only force acting on them is the force of gravity which is vertically downward.

If there was not gravitational and other forces acting after the sutdents launched the balls, they  would continue to travel in the same direction and with the same speed that it started to move.

Due to the gravitational force, the combination of the initial speed acquired by each ball, by the force applied by each student, and the downward acceleration after the balls left the students' hands make that the motion of the balls be parabolic.

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When magnesium chloride is formed what question will the student need to ask prior to writing the formula?
ivann1987 [24]

Prior to writing the chemical formula of magnesium chloride, a question which any student will need to ask is: A.  What are the oxidation numbers of each atom?

A chemical formula can be defined as a scientific notation that is used to show (represent) the type and total number of atoms that constitute a particular chemical molecule or compound, by using the oxidation number, chemical symbols and subscripts.

Hence, a student would need to know the oxidation numbers of each atom when magnesium chloride is formed after a chemical reaction.

In Chemistry, an oxidation number represents the number of electrons <u>gained</u> or <u>lost</u> by an atom of a chemical element during a chemical reaction.

In conclusion, when magnesium chloride is formed, a question which the student will need to ask prior to writing the chemical formula is "what are the oxidation numbers of each atom?"

Read more: brainly.com/question/13750908

3 0
2 years ago
Covert 32 ft/sec^2 to m/min^2
igor_vitrenko [27]

Answer:

Explanation:

585.2 meters per minute in 32 feet per second To convert any value in feet per second to meters per minute, just multiply the value in feet per second by the conversion factor 18.288. So, 32 feet per second times 18.288 is equal to 585.2 m/min.

3 0
3 years ago
When 0.0901 mol of an unknown hydrocarbon is burned in a bomb calorimeter, the calorimeter increases in temperature by 2.19°C. I
Alexus [3.1K]

Answer:

The heat of combustion for the unknown hydrocarbon is -29.87 kJ/mol

Explanation:

Heat capacity of the bomb calorimeter = C = 1.229 kJ/°C

Change in temperature of the bomb calorimeter = ΔT = 2.19°C

Heat absorbed by bomb calorimeter = Q

Q=C\times \Delta T

Q=1.229 kJ/^oC\times 2.19^oC=2,692 kJ

Moles of hydrocarbon burned in calorimeter = 0.0901 mol

Heat released on combustion = Q' = -Q = -2,692 kJ

The heat of combustion for the unknown hydrocarbon :

\frac{Q'}{0.090 mol}=\frac{-2,692 kJ}{0.0901 mol}=-29.87 kJ/mol

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3 years ago
Read 2 more answers
Question 18 (5 points)
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Answer:

d. oxygen is a pure substance and rocks are mixtures

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