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lara [203]
3 years ago
14

Julie finds a snail on the sidewalk and wants to know whether or not the snail moves throughout the day. She places a

Chemistry
2 answers:
jasenka [17]3 years ago
4 0

Answer:

d

Explanation:

AURORKA [14]3 years ago
3 0
Acting as a reference point for detecting motion
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What is the difference in height between the top surface of the glycerin and the top surface of the alcohol? Suppose that the de
Dvinal [7]

Here is the full question

Glycerin is poured into an open U-shaped tube until the height in both sides is 20 cm. Ethyl alcohol is then poured into one arm until the height of the alcohol column is 10 cm. The two liquids do not mix.

What is the difference in height between the top surface of the glycerin and the top surface of the alcohol? Suppose that the density of glycerin is 1260 kg/m3and the density of alcohol is 790 kg/m3.

Express your answer in two significant figures and include the appropriate units (in cm)

Answer:

ΔH ≅ 3.73 cm

Explanation:

The pressure inside a liquid is known as hydrostatic pressure and which is represent by the formula:

P =   ρ × g × h

where;

ρ is the density of the fluid

g is the gravitational constant

h is the height from the surface

From the question above;

For glycerine; we have:

density of glycerine = 1260 kg/m³

gravitational constant = 9.8 m/s²

height = ???

∴

P_{(g)= 1260kg/m^3}*9.8m/s^2*h_g   ----- equation (1)

On the other hand for alcohol:

density of alcohol is given as = 790 kg/m³

gravitational constant = 9.8 m/s²

height = 10 cm

∴

P_{(a)= 790kg/m^3*9.8m/s^2*10           ----------- equation (2)

if we equate equation 1 and 2 together; we have

P_{(g)= P_{(a)

1260kg/m^3}*9.8m/s^2*h_g = 790kg/m^3*9.8m/s^2*10cm

Making h_g the subject of the formula, we have :

h_g= \frac{ 790kg/m^3*9.8m/s^2*10cm}{1260kg/m^3*9.8m/s^2}

h_g = 6.269 cm

The difference in the height denoted  by ΔH can therefore be calculated as:

ΔH = H_a-H_g

ΔH = 10cm - 6.269cm

ΔH = 3.731 cm

ΔH ≅ 3.73 cm           (to two significant figures)

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3 years ago
Cual es la formula universal de
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T gn bjjjkknnnkkm
explanation:
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2 years ago
Why is hydronium ion not an electrophile
galina1969 [7]

Answer:

Hydronium ion is not an electrophile because, its positive charge is on oxygen and its octet is filled.

Explanation:

5 0
3 years ago
What is diffrent betwenn newtonian and non newtonian?​
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Answer:

Newtonian fluids have a constant viscosity that does not change and non newtonain fluids have a viscosity that varies.

Explanation

Newtonian fluids have a constant viscosity and a zero shear rate at zero shear stress. Non-Newtonian fluids have a variable viscosity and a varible relationship with shear stress.

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How do you balance the following equation only using coefficients?
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The answer will be 6CO2 + 6H2O ——-> 1 C6H12O6 + 6O2

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