Sprinter set in starting blocks at the beginning of a race rely on what kind of energy conversion

Chemistry

1 answer:

ale4655 [162]3 years ago

8 0

They convert chemical potential energy (stored in muscle cells) to kinetic energy (running)

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Why cant (NaCl) light the bulb until the NaCl is dissolved in water. *

Aneli [31]

Answer:

NaCl will only conduct electricity in solutions

Explanation:

For electrical conduction, free mobile electrons as seen in most metals must be present or ions which are charged particles must be available for solutions and molten substances.

Sodium chloride is an ionic compound without free mobile electrons or ions despite being ionic.
It will maintain a subtle and unique charge stability when in solid form.
In solid, the ions are not free to move and remain locked up in the solid mass.
When introduced into a solution, the ions becomes free to move and this will aid electrical conduction.

6 0

3 years ago

Write the condensed electron configurations for the Ca atom. Express your answer in condensed form as a series of orbitals. For

umka21 [38]

Answer:

[Ar] 4s²

Explanation:

Ca is the symbol for Calcium. It is the 20th element and it has 20 electrons.

The full electronic configuration for calcium is given as;

1s²2s²2p⁶3s²3p⁶4s²

The condensed electronic configuration is given as;

[Ar] 4s²

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3 years ago

Since there are many organic compounds,how can you distinguish one organic compound from another

iogann1982 [59]

What are organic and inorganic compounds? Organic chemistry is the study of the carbon compounding molecules. Inorganic chemistry, by contrast, is the study of all compounds that do NOT contain carbon compounds.

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3 years ago

Suppose oxygen was much less electronegative than it is, so that hydrogen-oxygen bonds were much less polar and hydrogen bonds c

spayn [35]

Water would have a much lower boiling point much like its other hydrides and it would loss its ability to dissolve polar substances plus it couldn't form water columns so no more cohesion between water molecules

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3 years ago

Read 2 more answers

A ring costs $36 more than a bracelet. the cost of the bracelet is 4/7 the cost of the ring. find the total of the two items.

avanturin [10]

So let's use some equations to represent the data [let R= cost of ring & B= cost of bracelet]

R= B + $ 36 .... (1)

B= $\frac{4}{7}$ × R ... (2)

By using simultaneous equations to solve for B and R.
Substitute eq. (1) into eq. (2)

B = $\frac{4}{7}$ × (B + $36)

B = $\frac{4}{7}$ B + $\frac{144}{7}$

$( \frac{7}{7} - \frac{4}{7} ) B = \frac{144}{7}$

$\frac{3}{7} B = \frac{144}{7}$

⇒ B = $48

By substituting value of B into ea (1)

If R = B + $36

R = ($48) + $36

= $84

∴ <span> the total of the two items = R + B
= $84 + $48
</span> = $132

7 0

3 years ago