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kkurt [141]
3 years ago
10

What is the difference between convex and concave mirrors and lens?

Physics
1 answer:
Sidana [21]3 years ago
5 0
Concave makes things smaller and convex makes things bigger
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What word chemical equation describes this chemical reaction?
Mrrafil [7]
Sodium + chlorine = sodium chloride
5 0
3 years ago
The gage pressure in a liquid at a depth of 3 m is read to be 50 kPa. Determine the gage pressure in the same liquid at a depth
Andrei [34K]

Answer:

The Gauge pressure at 9 meters depth is 150 \, kPa

Explanation:

Gauge pressure is the difference between absolute pressure and some reference pressure, most commonly atmospheric pressure. The increment in pressure caused by a static fluid is given by:

\Delta P = \rho g d where \rho is the density of the liquid,  g is the accleration due to gravity and d is the depth.

Now, we see that \Delta P is linearly proportional to d, and we can assume that \rho remains constant, because liquids are usually not compressible.

Given that the greater depth is simply 3 times the smaller depth:

d_2=3\cdot d_1\\9\,m= 3 \cdot 3\,m

\Delta P at 9\, m of depth will also be three times the gauge pressure at 3 \,m of depth.

We could also have calculated \rho ny using:

\Delta P = \rho \,g \,d\\\\\rho = \frac{\Delta P}{g \, d}\\\\\rho = \frac{\Delta P}{g \, d}= \frac{30 \,kPa}{9.8 \frac{m}{s^2}  \, 3\,m}=1020.41 \frac{kg}{m^3}

and used this result to calculate the gauge pressure. These are both similar methods that yield the same result

4 0
3 years ago
| 1)
Zarrin [17]

Answer:

  • <u><em>Option A) A gas was produced.</em></u>

Explanation:

Indeed, the production of a gas is an indication that a new substance was produced as result of the reaction of the matter that constitutes the antiacid tablet and the distilled water.

A chemical reaction is a change that yields the formation of new substances (products), due to the rearrangements of the atoms of the reactants.

In a very simple form, you can represent a chemical reaction by the general equation:

  • Reactants → Products

Which means that some elements or compounds, those in the reactant side of the equation, undergo a change in which some chemical bonds are broken, the atoms separate from the original substances and combine into a new arrangement in which they form one or more different substances (products).

The option B), that the table dissapeared is not a clear evidence of a chemical change because it could have been dissolved, which is a physical change.

Also, the option C), that there was a color change, cannot be cited as an evidence of a chemical reaction, since the color is a physical property.

As for the option D, that there was a change in mass, is not a viable option, since mass cannot change either with a chemical or physical change.

3 0
3 years ago
a car traveling at 11.2 m/s increases speed to 24.6 m/s over 4.4 seconds. what is the acceleration of the car
Sveta_85 [38]

Answer:

24.6 - 11.2 / 4.4 = 3.045m/s

Explanation:

acceleration = vf-vi / time

vf= 24.6 m/s

vi= 11.2 m/s

t= 4.4s

4 0
4 years ago
40 POINTS I’ve been stuck on this for hours please help :(
Norma-Jean [14]

Answer:

Explanation:

Particle         Relative Mass       Charge               Location

Proton             1                            +                        Nucleus

Electron          0                            -                        Outside rings (not nucleus)

Neutron.         1                            No Charge        Nucleus

7 0
3 years ago
Read 2 more answers
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