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faust18 [17]
3 years ago
12

Calculate the volume that 42g of nitrogen gas (N2)occupies at standard temperature and pressure.​

Physics
1 answer:
luda_lava [24]3 years ago
8 0

Nitrogen gas has a molar mass of about 28.0134 g/mol. Then we have a starting amount of

(42 g) / (28.0134 g/mol) ≈ 1.4993 mol

of N₂.

At standard temperature and pressure, one mole of an ideal gas occupies a volume of about 22.4 L. Then 42 g, or 1.4993 mol, of N₂ takes up

(1.4993 mol) × (22.4 L/mol) ≈ 33.6 L

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A string is tied between two posts separated by 2.4 m. When the string is driven by an oscillator at frequency 567 Hz, 5 points
Alex787 [66]

Explanation:

The given data is as follows.

       Length (l) = 2.4 m

       Frequency (f) = 567 Hz

Formula to calculate the speed of a transverse wave is as follows.

                  f = \frac{5}{2l} \times v

Putting the gicven values into the above formula as follows.

                  f = \frac{5}{2l} \times v

                 567 Hz = \frac{5}{2 \times 2.4 m} \times v

                      v = 544.32 m/s

Thus, we can conclude that the speed (in m/s) of a transverse wave on this string is 544.32 m/s.

5 0
3 years ago
Kate is working on a project in her tech education class. She plans to assemble a fan motor. Which form of energy does the motor
andreyandreev [35.5K]

Motion Energy

I am writing this so it can be more than 20 letters

7 0
3 years ago
Question #6a) You were told to assume that the ball bounced to a height of 1.2 m and that the distance between the bounces measu
Inessa [10]

Answer:

Explanation:

In the problem they give the case of a ball that bounces on the vertical axis the height is getting smaller, on the x axis it is the same distance all the time.

Questions about the aspect of the x-axis

- Since the distance traveled between the rebounds is the same, the speed must be the same or constant throughout the entire journey.

- Since the distance and speed are equal, the time between rebounds is the same

- There can be no acceleration because the bounce gap should change, the acceleration is zero all the time

Questions about the Y axis

- The vertical speed of the first boat would be the greatest of all, so it has the highest height

b) Evidence or not Evidence

1  evidence, because the graphs are different, one is a straight line and he gives a parable

2 no evidence, nothing involved on the x axis

3  no evidence, the acceleration on the y axis is independent of the acceleration on the x axis

4  no evidence, the time that is cast is the only change that is the same for both movements

5  evidence, the fact that no mixture of components is found allows the variable to be separated into different equations

6  no evidence, says nothing about the x-axis

4 0
3 years ago
A pulse of red light and a pulse of blue light enter a glass block normal to its surface at the same time. after passing through
pshichka [43]
I believe the red light would go faster than the blue.
7 0
3 years ago
Read 2 more answers
A heat engine is operating on a Carnot cycle and has a thermal efficiency of 47 percent. The waste heat from this engine is reje
Fantom [35]

Answer:

Explanation:

Given that,

Efficiency of Carnot engine is 47%

η =47%=0.47

The wasted heat is at temp 60°F

TL=60°F

Rate of heat wasted is 800Btu/min

Therefore, rate of heat loss QL is

QL' = 800×60 =48000

The power output is determined from rate of heat obtained from the source and rate of wasted heat.

Therefore,

W' = QH' - QL'

Note QH' = QL' / (1-η)

W' = QL' / (1-η) - QL'

W'=QL' η / (1-η)

W'= 48000×0.47/(1-0.47)

W'=42566.0377 BTU

1 btu per hour (btu/h) = 0.00039 horsepower (hp)

Then, 42566.0377×0.00039

W'=16.6hp

Which is approximately 17hp

b. Temperature at source

Using ratio of wanted heat to temp

Then,

TH / TL = QH' / QL'

TH = TL ( QH' / QL')

Since, QH' = QL' / (1-η)

Then, TH= TL( QL' /QL' (1-η))

TH=TL/(1-η)

TL=60°F, let convert to rankine

°R=°F+459.67

TL=60+459.67

TL=519.67R

TH=519.67/(1-0.47)

TH=980.51R

Which is approximately 1000R

6 0
2 years ago
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