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3 years ago

What two aspects of a force do scientists measure?

Chemistry

2 answers:

Rashid [163]3 years ago

7 0

Answer: option c. magnitude and direction

Explanation:

1) Force is a vector: it has magnitude and direction.

2) Magnitude measures the "intensity" of the force. It is measured in newtons (N), in the SI (international system of units). One newton is the force exerted to confere an acceleration of 1 m/s² to a mass of 1 kg.

3) Telling the magnitude of the force is not enough information to understand what the force is and to predict its effect.

It is necessary to tell the direction in which the force is applied.

It is not the same a force of 10 N that pulls that the same magnitude pushing. And it is not the same a hhorizontal force of 100 N to move an object, than the same magnitude applied at an agle.

That is why the force must be measured and reported as a magnitude and a direction.

4) Examples of forces correctly reported are:

i) 100 N vertically upward

ii) 1000 N 20° to the east of the north.

iii) 0.2 N with an elevation angle of 50°.

Then, scientists must measure the magnitude and the direction of the force.

weeeeeb [17]3 years ago

7 0

<span>1. </span><span>The answer is C.
It is the magnitude and the direction that the scientist considered to measure the aspect of force.
=> Magnitude can be describe in 3 terms.
In mathematics it is considered as the relative size of an object.
IN Astronomy, it is considered as the measure of brightness and differences of brightness in astronomy study
And in earthquake, it is a measure of the energy of earthquake.
=> Direction is a course or an explicit instruction where a certain object move.</span>

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Which of the following represents the electron configuration of rhodium

nordsb [41]

Answer:

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Explanation:

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4 years ago

If you dilute 40.0 mL of a 7.0 M solution to make 100.0 mL of solution, what is the molarity of the dilute solution?

Burka [1]

Answer:

2.8M

Explanation:

The following data were obtained from the question:

Volume of stock solution (V1) = 40mL

Molarity of the stock solution (M1) = 7M

Volume of diluted solution (V2) = 100mL

Molarity of diluted solution (M2) =?

Using the dilution formula, we can easily find the molarity of the diluted solution as follow:

M1V1 = M2V2

7 x 40 = M2 x 100

Divide both side by 100

M2 = (7 x 40)/100

M2 = 2.8M

Therefore, the molarity of the diluted solution is 2.8M

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3 years ago

Which words or phrases identify layers of groundwater?

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The ground water refers to water present in the under earth in the cracks or pores or similar spaces.We majorly depends upon this sources of water specially in rural area.

It helps in irrigation and also serve as drinking water supply.

The words or phrases which identify layer of ground water are:

a) water table: the uppermost water saturated layer

b) kettle lake: it is an underground lake (not ground water)

c) Saturation zone : this is the zone of water below the water table

d) undergound lake: this is kettle lake (not ground water)

e) sink hole: Not a layer of ground water

So the layers of ground water are

a) water table

b) saturation zone

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3 years ago

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Explain the differences between bronze and brass, and steel and cast iron. Which is best used for cooking wares?

Dennis_Churaev [7]

Answer:

Steel and cast iron

Explanation:

They are all metal but assuming that you are finding the best material for your pan i suggest going for steel or cast iron

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3 years ago

For this question, the "entropy term" refers to "-TΔS". Addition reactions are generally favorable at low temperatures because _

nata0808 [166]

Answer:

Lowering the temperature typically reduces the significance of the decrease in entropy. That makes the Gibbs Free energy of the reaction more negative. As a result, the reaction becomes more favorable overall.

Explanation:

In an addition reaction there's a decrease in the number of particles. Consider the hydrogenation of ethene as an example.

$\rm H_2C\text{=}CH_2\; (g) + H_2\; (g) \stackrel{\text{Ni}^\ast}{\to} H_3C\text{-}CH_3\; (g)$ .

When $\rm H_2$ is added to $\rm H_2C\text{=}CH_2$ (ethene) under heat and with the presence of a catalyst, $\rm H_3C\text{-}CH3$ (ethane) would be produced.

Note that on the left-hand side of the equation, there are two gaseous molecules. However, on the right-hand side there's only one gaseous molecule. That's a significant decrease in entropy. In other words, $\Delta S < 0$ .

The equation for the change in Gibbs Free Energy for a particular reaction is:

$\Delta G = \Delta H + (\underbrace{- T \, \Delta S}_{\text{entropy}\atop \text{term}})$ .

For a particular reaction, the more negative $\Delta G$ is, the more spontaneous ("favorable") the reaction would be.

Since typically $\Delta S < 0$ for addition reactions, the "entropy term" of it would be positive. That's not very helpful if the reaction needs to be favorable.

$T$ (absolute temperature) is always nonnegative. However, lowering the temperature could help bring the value of

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3 years ago