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ValentinkaMS [17]
4 years ago
8

Backpackers often use canisters of white gas to fuel a cooking stove's burner. If one canister contains 1.45 L of white gas, and

the density of the gas is 0.710 g/cm3, how many kilograms of fuel are contained in one canister? Express the mass in kilograms to three significant figures.
Physics
1 answer:
lorasvet [3.4K]4 years ago
4 0

Answer: One canister contains 1.03 Kg of fuel,

Explanation:

The density is defined as the relation between the mass and the volume p=\frac{m}{v}

First of all you need to have the same units for volume and density, so:

For the volume,

1.45 L * \frac{1.10*10^{-3}m^{3}  }{1 L} = 1.45 *10^{-3} m^{3}

For the density,

p = 0.710\frac{g}{cm^{3} } *\frac{1cm^{3} }{1*10^{-6}m^{3}  }*\frac{1 Kg}{1*10^{3}g } = 710\frac{Kg}{m^{3} }

From the density equation we have m=p*v, so:

710\frac{Kg}{m^{3} } *1.45*10^{-3} m^{3} = 1.03Kg

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Explanation:

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Gay-Lussac’s law, because as the pressure increases, the temperature increases

Explanation:

First of all, we can notice that the volume of the tank is fixed: this means that the volume of the air inside is also fixed.

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p\propto T

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Can someone help?
laila [671]

Answer:

i) 21 cm

ii) At infinity behind the lens.

iii) A virtual, upright, enlarged image behind the object

Explanation:

First identify,

object distance (u) = 42 cm (distance between  object and lens, 50 cm - 8 cm)

image distance (v) = 42 cm (distance between  image and lens, 92 cm - 50 cm)

The lens formula,

\frac{1}{v} -\frac{1}{u} =\frac{1}{f}

Then applying the new Cartesian sign convention to it,

\frac{1}{v} +\frac{1}{u} =\frac{1}{f}

Where f is (-), u is (+) and  v is (-) in  all 3  cases. (If not values with signs have to considered, this method that need will not arise)

Substituting values you get,

i) \frac{1}{42} +\frac{1}{42} =\frac{1}{f}\\\frac{2}{42} =\frac{1}{f}

f = 21 cm

ii) u =21 cm, f = 21 cm v = ?

Substituting in same equation\frac{1}{v} =\frac{1}{21} =\frac{1}{21} \\\\\frac{1}{v} = 0\\

  v ⇒ ∞ and image will form behind the lens

iii) Now the object will be within the focal length of the lens. So like in the attachment, a virtual, upright, enlarged image behind the object.

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3 years ago
A train moves at a constant speed of 35 m/s. How long it will take for the train to move 102 m?
Anastasy [175]

Answer:

is B because 35 times 2.9 equals 101.5 and if you round it is 102

8 0
3 years ago
Two narrow slits 84 mum apart are illuminated with light of wavelength 650 nm. What is the angle of the m = 3 bright fringe in r
Digiron [165]

Answer:

The angle is 1.33°.

Explanation:

Given that,

Distance d=84\times10^{-6}\ m

Wavelength = 650 nm

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Using formula of angle for brightness

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\theta=\sin^{-1}\dfrac{m\lambda}{d}

Where, d = distance

\lambda =wavelength

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Put the value into the formula

\theta=\sin^{-1}\dfrac{3\times650\times10^{-9}}{84\times10^{-6}}

\theta=1.33^{\circ}

Hence, The angle is 1.33°.

3 0
3 years ago
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