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valentinak56 [21]
3 years ago
12

The density of a substance equals its mass divided by its volume. Talia listed the density of some common materials at 20 °C.

Physics
2 answers:
Zolol [24]3 years ago
6 0

Answer:

mercury

Explanation:

djyliett [7]3 years ago
6 0
Remember that volume = mass/density.
Therefore, if you have 10 grams of a substance, divide that by its density to find its volume.
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How much potential energy does an 8 kg flower pot hanging 5 m above the ground have
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Explanation:

Relative to ground level it has

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Use each of the following terms in a separate
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I think the correct answer is going to be A
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What are the types of energies released when a candle burns?
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When a candle is burning the candle is releasing thermal and radiant energy
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If you walk 1.2 km north and then 1.6 km east, what are the magnitude and direction of your resultant displacement?
vodomira [7]

<u>Answer:</u>

 Option A is the correct answer.

<u>Explanation:</u>

  Let the east point towards positive X-axis and north point towards positive Y-axis.

 First walking 1.2 km north,  displacement = 1.2 j km

 Secondly 1.6 km east, displacement = 1.6 i km

 Total displacement = (1.6 i + 1.2 j) km

 Magnitude = \sqrt{1.2^2+1.6^2} = 2 km

 Angle of resultant with positive X - axis = tan^{-1}(1.2/1.6)=36.87^0 = 36.87⁰ east of north.

 

5 0
2 years ago
You’ve had practice calculating the grams of hydrogen gas, but it is also possible to calculate the amount of oxygen gas produce
alekssr [168]

Answer:41.991ml

Explanation:

Equations: 2 H2O → 4H+ + 4e + O2 OXIDATION

2 H+ + 2e → H2 REDUCTION 

Electrolysis is the chemical decomposition of compounds when electricity is made to pass through a molten compound or solution.

from the oxidation reaction:

1moles of oxygen requires 4moles of electrons to be discharged at the product

F=96500C/mol

Quantity of charge Q=It

=60*60*0.201A

Q=723.6C

Mole=Q/(F*mole ratio of electron)

Mole= 723.6/(4*96500)

Mole=((1809)/(965000))

M=0.0018746114

M1/M2=V1/V2

1/0.00187=22.4dm^3/V2

V2=22.4*0.00187

V2=0.04199129534dm^3

41.99129534ml

5 0
2 years ago
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