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Ipatiy [6.2K]
3 years ago
9

PLEASE HELP!!! GIVING BRAINLIEST!! ill also answer questions that you have posted if you answer these correctly!!!! (47pts)

Physics
1 answer:
Bingel [31]3 years ago
8 0

\huge\mathfrak\red{answer}

Jake was playing making a paper airplane, after making he kept it on the table and went to have food.

Suddenly his brother saw the plane and threw it in the air, The airplane kept flying for about 3m/s and it hit his mother and due to the force the plane stopped.

{kept in on the table>rest

brother threw the plane>moving

it hit his mother>force that stopped it}

(mark me brainliest if you're satisfied with my answer)

\large\sf\red{thank \: you}

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One barometer tube has twice the cross-sectional area of another. mercury in the smaller tube will rise _____.
Andreas93 [3]
The answer is "the same than the mercury in the bigger tube".

If one barometer tube has twice the cross-sectional area of another, mercury in the smaller tube will rise the same than the mercury in the bigger tube.

The mercury will rise to the point where the column of mercury has the same weight as the force exerted by the atmosphere.

The force exerted by the atmosphere is pressure * cross-sectional area

Anf the weight of the column of mercury, W, will be:

W = m* g

where m = density * volume, and volume = cross-sectional area * height

=> W = density * cross-sectional area * height

Then,  you make W = F and get:

density * cross-sectional area * height = P * cross-sectional area

The term cress-sectional area appears on both sides so it gets cancelled, and the height of the column of mercury does not depend on the cross-sectional area of the barometer.


4 0
3 years ago
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Waves transfer energy. What have you observed about light, sound, or water that could support this claim?
sattari [20]

Light warms objects when it shines on them. Sound waves from a powerful stereo can make the floor vibrate. Water waves crash on the beach with force. These observations support the claim that waves transfer energy.

6 0
3 years ago
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Objects that can release energy in ways other than by falling have __________ energy.
Rasek [7]

Answer:

Kinetic

Explanation:

If it is falling

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The Himalayas, Andes, and the Alps are some <span />
5 0
3 years ago
A Venturi tube may be used as a fluid flowmeter. Suppose the device is used at a service station to measure the flow rate of gas
leonid [27]

Answer

given,

flow rate = p = 660 kg/m³

outer radius = 2.8 cm

P₁ - P₂ = 1.20 k Pa

inlet radius = 1.40 cm

using continuity equation

 A₁ v₁ = A₂ v₂

 π r₁² v₁ = π r₁² v₂

 v_1= \dfrac{r_1^2}{r_2^2} v_2

 v_1= \dfrac{1.4^2}{2.8^2} v_2

 v_1= 0.25 v_2

Applying Bernoulli's equation

 \Delta P = \dfrac{1}{2}\rho (v_2^2-v_1^2)

 \Delta P = \dfrac{1}{2}\rho (v_2^2-(0.25 v_2)^2)

 \Delta P = \dfrac{1}{2}\rho v_2^2 (1 - 0.0625)

 v_2=\sqrt{\dfrac{2\Delta P}{\rho(1 - 0.0625)}}

 v_2=\sqrt{\dfrac{2\times 1200}{660 \times(1 - 0.0625)}}

       v₂ = 1.97 m/s

b) fluid flow rate

Q = A₂ V₂

Q = π (0.014)²  x 1.97

Q = 1.21 x 10⁻³ m³/s

5 0
4 years ago
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