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spayn [35]
3 years ago
7

What happens to the potential energy of an object when it falling from a high place?

Chemistry
1 answer:
Juliette [100K]3 years ago
7 0

Answer:

The higher up an object is the greater its gravitational potential energy. ... As most of this GPE gets changed into kinetic energy, the higher up the object starts from the faster it will be falling when it hits the ground. So a change in gravitational potential energy depends on the height an object moves through.

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A scientist studies the growth of plants in a laboratory. Which experimental procedure would provide evidence that
dusya [7]

The experimental procedure would provide evidence that plants need

nitrogen to grow is by

  • Identical plants are placed in two air-tight containers with sufficient exposure to sunlight.
  • One container has nitrogen gas, and the other has room air. The scientist measures plant growth

It is necessary to use identical plants during the experiment as plants have

different rates of nitrogen absorption from the soil. It should also be done in

air-tight containers called terrariums to prevent loss or contamination of the

gases with other elements/compounds.

The identical plants containing nitrogen and room air should both be

measured for the growth difference between them.

Read more on brainly.com/question/972291

7 0
3 years ago
Somebody please answer
Zepler [3.9K]

Answer:

177 mmHg

Explanation:

Given that:

The sample of  a gas is with Pressure (1) P_1 = 500 mmHg

The initial temperature T_1 = 773 K

The final temperature T_2 = 273 K

Using ideal gas equation:

\dfrac{P_1}{T_1} = \dfrac{P_2}{T_2} \\ \\  \dfrac{500}{773} = \dfrac{P_2}{273} \\ \\  (136500) = 773 \times P_2 \\ \\ P_2 = \dfrac{136500}{773} \\ \\  P_2 = 176.58 \ mmHg \\ \\  \simeq 177 mmHg

7 0
3 years ago
Ammonia reacts with sulfuric acid to produce the important fertilizer, ammonium hydrogen sulfate.
Liula [17]

Answer:

404.8g of (NH4)HSO4 is produced.

Explanation:

Step 1:

Data obtained from the question. This include the following:

Temperature (T) = 10°C = 10°C + 273 = 283K

Pressure (P) = 110KPa = 110/101.325 = 1.09atm

Volume (V) = 75L

Step 2:

Determination of the number of mole of ammonia, NH3.

The number of mole (n) of ammonia, NH3 can be obtained by using the ideal gas equation. This is illustrated below:

Note:

Gas constant (R) = 0.0821atm.L/Kmol

Number of mole (n) =?

PV = nRT

1.09 x 75 = n x 0.0821 x 283

Divide both side by 0.0821 x 283

n = (1.09 x 75) /(0.0821 x 283)

n = 3.52 moles

Step 3:

Determination of the number of mole ammonium hydrogen sulfate produced from the reaction.

We'll begin by writing the balanced equation for the reaction. This is illustrated below:

NH3 + H2SO4 —> (NH4)HSO4

From the balanced equation above,

1 mole of NH3 produced 1 mole of (NH4)HSO4

Therefore, 3.52 moles of NH3 will also produce 3.52 moles of (NH4)HSO4.

Therefore, 3.52 moles of ammonium hydrogen sulfate, (NH4)HSO4 is produced.

Step 4:

Conversion of 3.52 moles of ammonium hydrogen sulfate, (NH4)HSO4 to grams. This is illustrated below:

Molar Mass of (NH4)HSO4 = 14 + (4x1) + 1 + 32 + (16x4) = 115g/mol

Number of mole of (NH4)HSO4 = 3.52 moles

Mass of (NH4)HSO4 =..?

Mass = mole x molar Mass

Mass of (NH4)HSO4 = 3.52 x 115 = 404.8g

Therefore, 404.8g of (NH4)HSO4 is produced.

5 0
3 years ago
°ω° Which statement best describes the skier? The skier has potential and kinetic energy. The skier has only potential energy. T
Alex17521 [72]
The skier has only kinetic energy
6 0
3 years ago
In an electrically neutral atom,
Soloha48 [4]

Answer:

the number of protons equals the number of

electrons

Explanation:

Because these particles have the same but opposite charges, equal numbers cancel out, producing a neutral atom.

3 0
3 years ago
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