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PSYCHO15rus [73]
2 years ago
14

Brian has an object suspended in the air. It has a mass of 100 kg and is 25 meters above the ground. What is the object’s potent

ial energy
Chemistry
2 answers:
MatroZZZ [7]2 years ago
7 0
The answer is 24500 joule
worty [1.4K]2 years ago
5 0

Answer:

P.E = 24500

Explanation:

Potential energy is the energy possessed by a object in a position. An object can store energy as a result of it position. An example is having a ball held upward by a pavement. The stored energy by the ball is known as the potential energy.

Since the object is suspended upward with a height of 25 meters , gravity is involved. Gravitational potential energy is the energy stored by an object as a result of it height.  Gravitational potential energy is dependent by the height which the object is raised and the mass. The higher the height of an object is raised the greater the gravitational potential energy.

The formula for gravitational potential energy is as follows ;

P.E = mass × height ×  gravitational field strength(9.8N/kg)

P.E = mgh

m = 100 kg

height = 25 meters

g = 9.8 N/kg

P.E = 100 × 9.8 × 25

P.E = 24500

You might be interested in
calculate how many milliliters of 0.142 M NaOH are needed to completely neutralize 21.4 mL of 0.294 M H2C4H4O6.
Flura [38]

Answer:

The answer to your question is 88.7 ml

Explanation:

Data

Volume = ?

Concentration of NaOH = 0.142 M

Volume of H₂C₄H₄O₆ = 21.4 ml

Concentration of H₂C₄H₄O₆ = 0.294 M

Balanced chemical reaction

               2 NaOH + H₂C₄H₄O₆  ⇒  Na₂C₄H₄O₆  +  2H₂O

1.- Calculate the moles of H₂C₄H₄O₆

Molarity = moles/volume

Solve for moles

moles = Molarity x volume

Substitution

moles = 0.294 x 21.4/1000

Result

moles = 0.0063

2.- Use proportions to calculate the moles of NaOH

              2 moles of NaOH ------------------ 1 moles of H₂C₄H₄O₆

               x                           ------------------ 0.0063 moles

               x = (0.0063 x 2) / 1

               x = 0.0126 moles of NaOH

3.- Calculate the volume  of NaOH

Molarity = moles / volume

Solve for volume

Volume = moles/Molarity

Substitution

Volume = 0.0126/0.142

Result

Volume = 0.088 L or 88.7 ml

3 0
3 years ago
3. How many moles of silver is 8.46x1024 atoms of<br> silver?
ioda

Answer:

<h2>14.05 moles</h2>

Explanation:

To find the number of moles in a substance given it's number of entities we use the formula

n =  \frac{N}{L} \\

where n is the number of moles

N is the number of entities

L is the Avogadro's constant which is

6.02 × 10²³ entities

From the question we have

n =  \frac{8.46 \times  {10}^{24} }{6.02 \times  {10}^{23} }  \\  = 14.053156

We have the final answer as

<h3>14.05 moles</h3>

Hope this helps you

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