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4 years ago

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1 answer:

4 0

Bode's law correctly predicted the distances of all known planets from Mercury to Saturn. It also predicted the location of the asteroid belt and Uranus. Which were then unknown.

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fingerprints left on a piece of glass such as a windowpane can show colored spectra like that from a diffraction grating. why?

charle [14.2K]

The skin oils from the finger will deposit on smooth surfaces in the pattern of the closely spaced ridges when the finger contacts them.

<h3>What is diffraction ?</h3>

The Huygens-Fresnel principle, which views each point in a propagating wave front as a collection of unique spherical wavelets, describes the diffraction phenomenon in classical physics. When a wave from a coherent source (such a laser) comes into contact with a slit or aperture that is roughly the same size as its wavelength, the characteristic bending pattern is most noticeable.

There are numerous closely spaced ridges and swirls on the skin of a fingertip. The skin oils from the finger will deposit on smooth surfaces in the pattern of the closely spaced ridges when the finger contacts them. In order to create a crude diffraction grating and create a coloured spectrum of the light travelling through or reflecting from the glass surface, open intervals between the lines of deposited oil can be used as slits.

To know more about Diffraction

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7 0

1 year ago

There is a maximum depth at which a diver can breathe through a snorkel tube because as the depth increases, so does the pressur

hammer [34]

Answer: $59.78\times 10^3\ Pa$

Explanation:

Given

Diver is at a depth of $h=6.1\ m$ inside the water $(\rho=10^3\ kg/m^3)$

As we go down pressure increases due to the weight of liquid column above us

Pressure difference is given by $P=\rho \times g \times h$

Where $\rho$ =density of liquid

h=depth

g=acceleration due to gravity

So external-internal pressure difference is

$\Delta P=10^3\times 9.8\times 6.1$

$\Delta P=59.78\times 10^3\ Pa$

8 0

3 years ago

Which statement best describes an electric current?

goldenfox [79]

Answer:

its B

Explanation:

the movement of charged particles in a conductor

7 0

3 years ago

Read 2 more answers

The chart below summarizes the forces applied to four different objects.

posledela

Answer:

C. Y

Explanation:

From Newton's second law of motion, we know that:

Force = mass x acceleration

So;

acceleration = $\frac{Force }{mass}$

Therefore, to have the highest acceleration at a constant force, the mass must be low. Acceleration is inversely proportional to mass.

Y has the least mass and it will have the highest acceleration

6 0

3 years ago

Black smokers are hot volcanic vents that emit smoke deep in the ocean floor. Many of them teem with exotic creatures, and some

erica [24]

If the density of water does not vary and the vents range in depth from about 1500 m to 3200 m below the surface, then the gauge pressure at a 2452-m deep vent is 224.268 atm.

Calculation:

Step-1:

It is given that the vents range in depth from about 1500 m to 3200 m below the surface. If we are assuming that the density of water does not vary. Then it is required to calculate the gauge pressure at a 2452-m deep vent.

The gauge pressure at a particular depth of ocean water is calculated as:

$P=\rho g h$

Here $\rho$ is the density of water, P is the required pressure, h is the depth of water, and g is the gravitational acceleration.

Step-2:

Now we are substituting the values to calculate the pressure at the depth of 2452-m.

$\\\begin{aligned}\\P&=\rho gh\\&=1030 (\text{ kg/m}^3)\times 9.8 (\text{ m/s}^2)\times 2452 \text{ m}\\&=24.75\times 10^6 \text{ Pa}\times\frac{1 \text{ atm}}{10.1325 \times10^4 \text{ Pa}}\\&=224.268 \text{ atm}\\\end{aligned}\\$

Learn more about gauge pressure here,

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5 0

2 years ago