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Masja [62]
3 years ago
10

Free fall is a situation in which the only force acting upon an object is gravity. Why do all objects in free fall have

Chemistry
1 answer:
STatiana [176]3 years ago
6 0

Answer:

Because the acceleration due to gravity does not depend on the mass of the object

Explanation:

An object is said to be in free fall if there is only one force acting on it: the force of gravity, whose magnitude is

F=mg

where

m is the mass of the object

g=9.8 m/s^2 is the acceleration due to gravity

From the formula, we observe that the force of gravity acting on an object depends on its mass. However, its acceleration does not. In fact, according to Newton's second law of motion, the net force acting on an object is equal to the product between its mass and its acceleration:

F=ma

where a is the acceleration. By combining the two equations, we get:

ma=mg\\\rightarrow a = g

which means that the acceleration of any object in free fall is equal to g, the acceleration due to gravity, because it does not depend on the mass of the object.

You might be interested in
Please help me!! thank you so much!!​
Elis [28]

Answer:

13.75

Explanation:

gets halved every 8 days so halved twice

4 0
4 years ago
Please help me with this I will give out extra points with the brain thing if you help me with this science question 1/7 image b
oksian1 [2.3K]

Answer:

D) The baby will continue to move forward as the car slows and be push into the padded car seat.

Explanation:

Newton's first law states that an object tends to be in a state of rest or motion unless and until an unbalanced external force acts on it. This means a body would continue to be in a state of motion unless external force stops it. A body in the state of rest will remain at rest unless an external force moves it.

An infant car seat is made to face the rear of the car. This is because, in case of a front-end collision, the car would come to a sudden stop but the bodies inside the car are in a state of motion and a sudden halt will cause the body to push in the opposite direction.

Thus, for an infant in the car, it would be a safer measure to place the seat facing the rear o the car because in this case, it would cause the baby to safely collide with the padded seat of the car.

7 0
3 years ago
Read 2 more answers
What is the molarity of a nitric acid solution if 43.13 mL 0.1000 M KOH solution is needed to neutralize 30.00 mL of the acid so
Leno4ka [110]

Answer:

0.144M

Explanation:

First, let us write a balanced equation for the reaction. This is illustrated below:

HNO3 + KOH —> KNO3 + H20

From the equation,

nA = 1

nB = 1

From the question given, we obtained the following:

Ma =?

Va = 30.00mL

Mb = 0.1000M

Vb = 43.13 mL

MaVa / MbVb = nA/nB

Ma x 30 / 0.1 x 43.13 = 1

Cross multiply to express in linear form

Ma x 30 = 0.1 x 43.13

Divide both side by 30

Ma = (0.1 x 43.13) /30 = 0.144M

The molarity of the nitric acid is 0.144M

8 0
3 years ago
Calculate the standard enthalpy of formation of carbon disulfide (CS2) from it's elements, given that C(graphite) + O2(g) → CO2(
ch4aika [34]

Answer:

Standard enthalpy of formation of Carbon disulfide CS2 = 87.3 KJ/mol

Explanation:

forming CS2 means that it should in the product side

C(graphite) + O2 → CO2                  ΔH = -393.5

2S(rhombic) + 2O2 → 2SO2            ΔH = -296.4 x 2

CO2 + 2SO2 → CS2 + 3O2             ΔH = -1073.6 x -1

the second reaction is multiplied by 2 so that the SO2 and O2 can cancel out.

the third reaction is reversed (multiplied by -1) so that CS2 will be on the product side.

after adding the reaction and cancelling out similarities, the final reaction is: C(graphite) + 2S(rhombic) → CS2

Add ΔH to find the enthalpy of formation of CS2

ΔHf = (-393.5) + (-296.4 x 2) + (-1073.6 x -1) = 87.3 KJ/mol

be aware of signs

3 0
3 years ago
How many grams are in 1.6 moles of potassium bromide?​
slava [35]

Answer:

190.4g

Explanation:

1.6mol of KBr (119.002g KBr/1 mol) = 190.4g

since you want to find grams, take the molar mass of KBr (119.002) per 1 mol and use it as your conversion factor (119.002g KBr/1 mol) which will then cancel out mols and leave you with grams.

6 0
4 years ago
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