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2 years ago

ASAP PLEASE HELP:

2 answers:

7 0

Thalia would need to consider that the sculpture's inertia is keeping the object in place. Newton's first law applies to this situation. The inertia would have to be overcome to enable the sculpture to move, but the inertia would also keep the sculpture moving after its movement was started. The force that is required to move the sculpture would depend on the mass and acceleration at which Thalia wanted the sculpture to move. Finally, any force applied to the sculpture would be resisted by the sculpture in an equal and opposite manner.

Debora [2.8K]2 years ago

5 0

Thalia would need to consider how big the sphere is , the mass of the sphere, permits required for the sphere, and how much it would cost to make the sphere.

Hope this helps!

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When atoms lose or gain electrons in chemical reactions they form?

taurus [48]

<span>When atoms lose or gain electrons in chemical reactions they form?
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2 years ago

Describe a single measurement that you could make that shows that a kettle is less than 100% efficient (providing evidence that

alexgriva [62]

Answer:

As you haven't explained what measurements you took before solving this problem, I will explain the general procedure to evaluate the efficiency of a kettle. I hope it helps you. I´ll send an attachement file with the full answer, since I couldn't write it here.

I assume that the material that is going to be heated in the kettle is water.

1- You have to boil water in it and take the time it takes to its boiling point (in seconds).

2- You have to evaluate the amount of energy the water absorbed Q with the efficiency formula which I explain in the attachement file.

3- Divide Q by the time it took to bring the water to boiling so you can have the power it consumed.

4- You divide the last value you obtained by the Kettles's power rating.

5- Multiply the last value by 100 to obtain a percentage value of efficiency.

Explanation:

Efficiency is the ration of a machine's useful work, in this case how much energy the water absorbed to get to its boiling point divided by the time it took to get to this point, and the total energy expended, in this case the kettles's power rating.

7 0

2 years ago

How does the arrangement of atoms in a mineral relate to its properties?

MakcuM [25]

The arrangement of atoms in a mineral can change its physical and chemical properties.
Diamonds and coal are both made of carbon, however, their chemical and physical properties are very different.

6 0

2 years ago

Read 2 more answers

Oxalic acid is a diprotic acid. calculate the percent of oxalic acid (h2c2o4) in a solid given that a 0.7984-g sample of that so

vlada-n [284]

This method of quantitative determination of percent purity is titrimetric reactions. These reactions most commonly involve neutralization reactions between an acid and a base. Then, we look at the neutralization reaction:

H₂C₂O₄ + 2 NaOH ⇒ Na₂C₂O₄ + 2 H₂O

So, we do the stoichiometric calculations. The important data we should know is the molar mass of oxalic acid which is equal to 90 g/mol.

(0.2283 mol/L NaOH * 0.3798 L * 1 mol H₂C₂O₄/ 2mol NaOH * 90 g/mol H₂C₂O₄) ÷ 0.7984 g *100%
= 488%

This is impossible. The purity can't be more than 100%. Looking at our calculations and the balance reaction, all steps were done correctly. So, I think there is some typographical error in the given. The mass of the sample should be 7.984 g. Then, the answer would be 48.87% purity.

5 0

2 years ago

Read 2 more answers

Write the formulas for the following ionic compounds: (a) copper bromide (containing the Cu+ ion), (b) manganese oxide (containi

ivann1987 [24]

Answer:The formulas of ionic compounds are:

a) $CuBr$

b) $Mn_2O_3$

c) $Hg_2I_2$

d) $Mg_3(PO_4)_2$

Explanation:

Formulas for the an ionic compounds is determine by:

Criss-cross method, the oxidation state of the ions gets exchanged and they form the subscripts of the other ions. This results in the formation of a neutral compound.

(a) Copper bromide :Given that it contains $Cu^+$ ion.