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balandron [24]
2 years ago
7

HEEEYYYYY HELLO CAN YOU HELP ME WITH THIS ? PLEASE? ​

Physics
1 answer:
Lubov Fominskaja [6]2 years ago
4 0

Answer:

Here are the names and symbols

H is Hydrogen

Au is Gold

Potassium is K

Mg is Magnesium

Zinc is Zn

Iron is Fe

Cl is Chlorine

Na is Natrium/Sodium

Copper is Cu

Ag is Silver

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The compressed-air tank ab has a 250-mm outside diameter and an 8-mm wall thickness. it is fitted with a collar by which a 40-kn
valentinak56 [21]
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3 0
3 years ago
A stone is dropped into a well. The sound of the splash is heard 3.5 seconds later. What is the depth of the well? Take the spee
Naddika [18.5K]

Answer:

The depth of the well, s = 54.66 m

Given:

time, t = 3.5 s

speed of sound in air, v = 343 m/s

Solution:

By using second equation of motion for the distance traveled by the stone when dropped into a well:

s = ut +\frac{1}{2}at^{2}

Since, the stone is dropped, its initial velocity, u = 0 m/s

and acceleration is due to gravity only, the above eqn can be written as:

s = \frac{1}{2}gt'^{2}

s = \frac{1}{2}9.8t^{2} = 4.9t'^{2}                     (1)

Now, when the sound inside the well travels back, the distance covered,s is given by:

s = v\times t''

s = 343\times t''                                              (2)

Now, total time taken by the sound to travel:

t = t' + t''

t'' = 3.5 - t'                                                                        (3)

Using eqn (2) and (3):

s = 343(3.5 - t')                                                                 (4)

from eqn (1) and (4):

4.9t'^{2} = 343(3.5 - t')

4.9t'^{2} + 343t' - 1200.5 = 0

Solving the above quadratic eqn:

t' = 3.34 s

Now, substituting t' = 3.34 s in eqn (2)

s = 54.66 m

3 0
3 years ago
Please help! Will mark best answer!!
MA_775_DIABLO [31]
The answer is (A) hope it helps 
7 0
2 years ago
Read 2 more answers
The following chart provides the pH of some common foods. How many would be considered basic?
Yuri [45]

The ones with pH greater than 7

Explanation:

A pH scale is a scale for expressing the level of acidity or alkalinity of aqueous solutions.

This scale is called a pH or pOH scale. The pH is the common one.

pH of a solution is the negative logarithm to base 10 o the hydrogen ion concentration of the solution.

  • The scale ranges from 1 through 14.
  • An acidic solution has a pH value less than 7. Neutral solutions have pH of 7 and basic solutions have pH greater than 7.

learn more:

acidity brainly.com/question/5121777

#learnwithBrainly

6 0
3 years ago
Where can you find the neutrons of an atom? in the nucleus with the protons orbiting the nucleus In the nucleus with the electro
cricket20 [7]

Answer:

Nuclease is the answer I know

I hope this is the answer

3 0
3 years ago
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