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3 years ago

Which of the following can explain the daily change in sea level observed along a coast?

Chemistry

2 answers:

gavmur [86]3 years ago

8 0

Answer:

The gravitational pull of the moon on the water near the coast (option A) can explain the daily change in sea level observed along a coast.

Explanation:

The tides are rising and falling from sea level that occur several times a day. These periodic changes in the level of the sea are produced by the gravitational forces of attraction of the Sun and the Moon with respect to the Earth. But the force of attraction of the Moon is greater than that of the Sun, due to the proximity of the satellite.

High tide or high tide is the time when the sea reaches its maximum height. Low tide or low tide is the time when the sea reaches its minimum height.

The tide is noticed on the beaches because the coastline can go forward or backward many meters.

Finally, the gravitational pull of the moon on the water near the coast (option A) can explain the daily change in sea level observed along a coast.

sertanlavr [38]3 years ago

6 0

D.the concentration of salt in the water her a the coast

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Aluminum foil is often incorrectly termed tin foil. If the density of tin is 7.28g/cm³,what is the thickness of a piece of tin f

leonid [27]

Answer:

15.0 µm

Step-by-step explanation:

Density = mass/volume

D = m/V Multiply each side by V

DV = m Divide each side by D

V = m/D

Data:

m = 1.091 g

D = 7.28 g/cm³

l = 10.0 cm

w = 10.0 cm

Calculation:

(a) Volume of foil

V = 1.091 g × (1 cm³/7.28 g)

= 0.1499 cm³

(b) Thickness of foil

The foil is a rectangular solid.

V = lwh Divide each side by lw

h = V/(lw)

= 0.1499/(10 × 10)

= 1.50 × 10⁻³ cm Convert to millimetres

= 0.015 mm Convert to micrometres

= 15.0 µm

The foil is 15.0 µm thick.

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3 years ago

How many moles of oxygen are there in 3 moles of Zn(NO3)2? (2 points)

muminat

there are 6 moles of oxygen in Zn(No3)2

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2 years ago

Explain how the digestive/excretory system is similar to a recycling center

CaHeK987 [17]

Answer:

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2 years ago

What piece of lab equipment would you use to conduct a small chemical experiment?

Scrat [10]

test tube

Explanation:

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3 years ago

Read 2 more answers

PLEASE SOMEBODY EXPLAIN THIS :(((

djverab [1.8K]

Answer:

$\boxed{ \sf \: R_f \: value \: of \: sample \: 1 =0.3142}$

<h3>Explanation:</h3>

In Analytical Chemistry chromatography is widely used for the separation of samples.

In thin layer chromatography, the mixture of components are separated on the basis of their polarity.
The solvent solution(mobile phase) that we use are non polar & silica gel( TLC paper made of/stationary phase) are polar.
Consider the mixture we have taken consist of two samples having large polar difference.
Due to opposite nature of silica gel(polar) & solvent solution (non polar) the movement become easy & due to capillary action solvent solution rise to the top.
The mixture of sample we have taken, the sample have less polarity have high peak or they travel more distance than that of more polar sample when they dipped into the solution.

In the given diagram, mixture of 8 samples are separated on the basis of their polarity, the distance travelled by solvent is 35 mm, distance travelled by sample 1 is 11 mm & similarly distance travelled by sample 2,3,4,5,6,7 are 15,31,4,22,25,33 in mm respectively.

Rf Value: Rf value is retention factor which tells about relative absorption of each sample & range of Rf value is 0-1.

Formula to calculate Rf value is

$\sf R_f \: value = \frac{distance \: moved \: by \: sample}{distance \: moved \: by \: solvent}$

Now, solving for Rf value of sample 1

Given:

Distance moved by sample 1 = 11 mm

Distance movedby solvent = 35 mm

To find:

Rf value of sample 1 = ?

Solution:

Substituting the given data in above formula,

$\small \sf R_f \: value = \frac{distance \: moved \: by \: sample \: 1}{distance \: moved \: by \: solvent} \\ \small \sf R_f \: value = \cancel\frac{11 \: mm}{35 \: mm} = 0.3142$

$\small \boxed{ \sf \: R_f \: value \: of \: sample \: 1 =0.3142}$

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4 0

2 years ago