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Gennadij [26K]
3 years ago
5

A large, cylindrical water tank with diameter 2.40 mm is on a platform 2.00 mm above the ground. The vertical tank is open to th

e air and the depth of the water in the tank is 2.00 mm. There is a hole with diameter 0.600 cmcm in the side of the tank just above the bottom of the tank. The hole is plugged with a cork. You remove the cork and collect in a bucket the water that flows out the hole.
A) When 1.00 gal of water flows out of the tank, what is the change in the height of the water in the tank?
B) How long does it take you to collect 1.00 gal of water in the bucket?
Physics
1 answer:
egoroff_w [7]3 years ago
6 0

Answer:

Explanation:

A ) radius of tank r = 1.2 m

depth of water in the tank = 2 m

1 gal of water =  1 / 264.17 m³

= 3.785 x 10⁻³ m³

Let h be the change in height of water in the tank .

volume of water flowing out

= π r² x h = 3.785 x 10⁻³

3.14 x 1.2² x h = 3.785 x 10⁻³

h = 83.71 x 10⁻⁵ m

= .84 mm .

B )

change in height is negligible .

velocity of efflux of water from the hole at the bottom

v = √ 2 gh

h is height of water level which is 2 m

v = √ (2 x 9.8 x 2 )

= 6.26 m / s

radius of hole = .3 x 10⁻² m

area of cross section

= π r²

= 3.14 x ( .3 x 10⁻² )²

= 28.26 x 10⁻⁶ m²

volume of water flowing through the hole per unit area

= area of cross section x velocity of efflux

= 28.26  x 10⁻⁶ x 6.26

If t be the time required ,

28.26  x 10⁻⁶ x 6.26 x t   = 3.785 x 10⁻³

t = 21.4 s

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Answer:

m = 69.9 kg

Explanation:

The mass and the weight of an object are two different quantities. Mass is basically the amount of matter that is present in a body. It remains same everywhere in the universe and measured in kilograms.

Weight is basically a force. It is the force by which earth attracts everything towards itself. The weight of an object changes from planet to planet, with the change in value of the gravitational acceleration (g).

Therefore, the relation between mass and weight of an object is given by the following formula:

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where,

m = mass = ?

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g = 9.8 m/s²

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m = (685 N)/(9.8 m/s²)

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3 years ago
Block on inclined plane experience a force due to gravity of 300N straight down. If the slope is inclined at 67.8°to the horizon
Tems11 [23]

Answer:

The component of the force due to gravity perpendicular and parallel to the slope is  113.4 N and 277.8 N respectively.

Explanation:

Force is any cause capable of modifying the state of motion or rest of a body or of producing a deformation in it. Any force can be decomposed into two vectors, so that the sum of both vectors matches the vector before decomposing. The decomposition of a force into its components can be done in any direction.

Taking into account the simple trigonometric relations, such as sine, cosine and tangent, the value of their components and the value of the angle of application, then the parallel and perpendicular components will be:

  • Fparallel = F*sinα =300 N*sin 67.8° =300 N*0.926⇒ Fparallel =277.8 N
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<u><em>The component of the force due to gravity perpendicular and parallel to the slope is  113.4 N and 277.8 N respectively.</em></u>

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Maru [420]
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red lights are an example of an electromagnetic wave. visible lights are the only electromagnetic waves we can actually see on the spectrum. red, in particular has the biggest wavelength.

b) ocean waves
ocean waves are not an electromagnetic wave. in fact, it’s a mechanical wave. electromagnetic waves can travel through a vacuum, that is empty space, but mechanical waves cannot.

c) sound waves
sound waves are also not an electromagnetic wave. it’s a mechanical wave. you cannot hear electromagnetic waves.

d) earthquakes
an earthquake is also not an example of electromagnetic waves. it’s a mechanical wave.

hope this helps!
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3 years ago
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Answer:

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Answer:

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