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3 days ago

A hollow cubical box is 0.30 m on an edge. This box is floating in a lake with one-third of its height beneath the surface. The

walls of the box have a negligible thickness. Water is poured into the box. What is the depth of the water in the box at the instant the box begins to sink?

Physics

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Early investigators (including Thomas Young) measured the thickness of wool fibers using diffraction. One early instrument used

ValentinkaMS [3465]

Answer:

$w= 1.867\times10^{-2}$

Explanation:

Provided:

fiber diameter d= 18 μm

screen distance D= 30 cm

wavelength λ= 560 nm

from this, we can determine the fringe width

$w=\frac{2\lambda D}{d}$

substituting the values yield

$w=\frac{2\times560\times10^{-9}\times0.3}{18\times10^{-6}$

$w= 1.867\times10^{-2}$

8 0

3 months ago

Ellen does an experiment by releasing a ball from a height of 1 m above each floor in a tall building. She records the time it t

serg [3582]

The question Ellen is likely exploring is "In what way does distance influence the gravitational force acting on objects?"

Explanation:

7 0

2 months ago

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On a caterpillars map all distances are marked in kilometers . The caterpillars map shows the distance between two milkweed plan

ValentinkaMS [3465]

Answer:

The equivalent distance in kilometers is 4012 × $10^{-6}$ km.

Explanation:

It's known that 1 millimeter converts to $10^{-3}$ meters. Then, 1 meter converts to $10^{-3}$ kilometers. Therefore, the conversion for 1 millimeter to kilometers can be stated as

1 mm = $10^{-3}$ m

1 m = $10^{-3}$ km

Thus, 1 mm = $10^{-3}$ × $10^{-3}$ km = $10^{-6}$ km.

Given the distance of 4012 mm, the corresponding distance in kilometers will be

4012 mm = 4012 × $10^{-6}$ km.

The distance therefore is 4012 × $10^{-6}$ km.

5 0

3 months ago

the flow energy of 124 L/min of a fluid passing a boundary to a system is 108.5 kJ/min. Determine the pressure at this point

serg [3582]

Answer:

The pressure measured at this moment is 0.875 mPa

Explanation:

Given that,

Flow energy = 124 L/min

Boundary to system P= 108.5 kJ/min

$P=1.81\ kW$

We are tasked with finding the pressure here

Applying the pressure formula

$P=F\times v$

$P=A_{1}P_{1}\times v_{1}$

Here, $A_{1}v_{1}=Q_{1}$

Where, v refers to velocity

Insert the values into the equation

$1.81 =P_{1}\times0.124\times\dfrac{1}{60}$

$P_{1}=\dfrac{1.81\times60}{0.124}$

$P_{1}=875.80\ kPa$

$P_{1}=0.875\ mPa$

Therefore, the pressure at this moment is 0.875 mPa

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3 months ago

Which phrase describes an atom?

kicyunya [3294]

<span>an atom is described as having a negatively charged electron cloud surrounding a positively charged nucleus, which is the correct choice.</span><span>

The nucleus contains electrically neutral neutrons and positively charged protons, establishing its positive charge. In contrast, electrons carry a negative charge. The electromagnetic force keeps the atoms bound to the nucleus.
</span>

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3 months ago