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3 years ago

3. Explain the relationship between power, energy and time.

1 answer:

7 0

There is a very simple relationship between the three. First off, power is the amount of energy used over a certain amount of time. Energy is the capacity of carrying out that power. Lastly, time depends on how much energy you have to exert the work.

Hope this helps :)

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Childrens chewable Tylenol contains 80.mg of acetaminophen per tablet. If the recommended dosage is 10 .mg/kg , calculate the nu

julsineya [31]

2.2 pounds in a kilogram.
70/2.2 = 31.818 kg of the child.
<span>10mg/kg and the tylenol is 80 mg per tables.
Child should take 318.18 mg divide that by per tablet 318.18/80 = 3.977 tablets. </span>
<span>We are using 1 sig fig, so that would make our answer be 4 tablets.</span>

5 0

3 years ago

How much energy is required to completely melt a 250 gram ice cube that is already at 0 degrees Celsius? Show your work & un

patriot [66]

Answer:

Q = 83500J

Explanation:

$Q = L_{ice} *m$

$L_{ice} = 3.34*10^{5} \frac{J}{kg}$

$m = 250g = 0.25kg$

$Q = (3.34*10^{5} \frac{J}{kg})*(0.25kg)$

$Q = 83500J$

7 0

3 years ago

What’s the answer to this?

Arturiano [62]

Answer : The balanced chemical reaction will be:

$3Ca(s)+2Al(NO_2)_3(aq)\rightarrow 2Al(s)+3Ca(NO_2)_2(aq)$

Explanation :

Balanced chemical reaction : It is defined as the reaction in which the number of atoms of individual elements present on reactant side must be equal to the product side.

When solid calcium metal reacts with aqueous aluminum nitrate then it gives aqueous calcium nitrate and solid aluminium.

The balanced chemical reaction will be:

$3Ca(s)+2Al(NO_2)_3(aq)\rightarrow 2Al(s)+3Ca(NO_2)_2(aq)$

5 0

3 years ago

Pls help me here, thanks in advance

Marat540 [252]

Answer:

What's the problem???

4 0

3 years ago

Read 2 more answers

Calculate the moles of Cu in 7.4×1021 atoms of Cu.

IceJOKER [234]

1 moles -------- 6.02x10²³ atoms
?? moles ----- 7.4x10²¹ atoms

moles = 7.4x10²¹ / 6.02x10²³

= 0.01229 moles

hope this helps!

5 0

4 years ago