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mamaluj [8]
3 years ago
8

A jet lands at 80.0 m/s, the pilot applying the brakes 2.0 s after landing.

Physics
1 answer:
asambeis [7]3 years ago
6 0

Answer:

Schiff by chili I hoop hookup

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A tennis ball was thrown straight up with initial velocity of 22.5 m/s. How high does the ball rise
kiruha [24]

Answer:

h_m=25.8\ m

Explanation:

<u>Vertical Launch Upwards</u>

In a vertical launch upwards, an object is launched vertically up without taking into consideration friction with the air.

If vo is the initial speed and g is the acceleration of gravity, the maximum height reached by the object is given by:

\displaystyle h_m=\frac{v_o^2}{2g}

The tennis ball was thrown straight up with a speed of v0=22.5 m/s. The acceleration of gravity is g=9.81\ m/s^2, thus:

\displaystyle h_m=\frac{22.5^2}{2\cdot 9.81}

\mathbf{h_m=25.8\ m}

6 0
3 years ago
Which of the following statements is true of the strong nuclear force?
vredina [299]

Explanation:

it holds protons and neutrons together

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Which type of drug would be useful in dilating the pupils for an examination of the retina? Which type of drug would be useful i
givi [52]

Answer:

muscarinic receptor inhibitor

Explanation:

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What do you call an increase in the magnitude of velocity
Vlad1618 [11]

Any change in the magnitude or direction of velocity is "acceleration".

4 0
3 years ago
Problem Page Gaseous ethane will react with gaseous oxygen to produce gaseous carbon dioxide and gaseous water . Suppose 28. g o
sergejj [24]

Answer : The maximum mass of carbon dioxide produced by the chemical reaction can be, 82.3 grams.

Solution : Given,

Mass of C_2H_6 = 28 g

Mass of O_2 = 190 g

Molar mass of O_2 = 32 g/mole

Molar mass of C_2H_6 = 30 g/mole

Molar mass of CO_2 = 44 g/mole

First we have to calculate the moles of C_2H_6 and O_2.

\text{ Moles of }C_2H_6=\frac{\text{ Mass of }C_2H_6}{\text{ Molar mass of }C_2H_6}=\frac{28g}{30g/mole}=0.933moles

\text{ Moles of }O_2=\frac{\text{ Mass of }O_2}{\text{ Molar mass of }O_2}=\frac{190g}{32g/mole}=5.94moles

Now we have to calculate the limiting and excess reagent.

The balanced chemical reaction is,

2C_2H_6+7O_2\rightarrow 4CO_2+6H_2O

From the balanced reaction we conclude that

As, 2 mole of C_2H_6 react with 7 mole of O_2

So, 0.933 moles of C_2H_6 react with \frac{7}{2}\times 0.933=3.26 moles of O_2

From this we conclude that, O_2 is an excess reagent because the given moles are greater than the required moles and C_2H_6 is a limiting reagent and it limits the formation of product.

Now we have to calculate the moles of CO_2

From the reaction, we conclude that

As, 2 mole of C_2H_6 react to give 4 mole of CO_2

So, 0.933 moles of C_2H_6 react to give \frac{4}{2}\times 0.933=1.87 moles of CO_2

Now we have to calculate the mass of CO_2

\text{ Mass of }CO_2=\text{ Moles of }CO_2\times \text{ Molar mass of }CO_2

\text{ Mass of }CO_2=(1.87moles)\times (44g/mole)=82.3g

Therefore, the maximum mass of carbon dioxide produced by the chemical reaction can be, 82.3 grams.

6 0
3 years ago
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