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notka56 [123]
3 years ago
12

Wich has more energy rolling down a hill - a bowling ball or soccer ball? Explain your answer

Chemistry
2 answers:
snow_tiger [21]3 years ago
7 0

Answer:

Explanation:

As a ball rolls downhill, its potential energy from its height is converted into kinetic energy of its motion. Potential energy is given by mass x gravity x height. So for the same height, a ball with higher mass will have more energy. A bowling ball is heavier than a soccer ball and will have more energy.

goldfiish [28.3K]3 years ago
6 0

Answer:

Bowling ball

Explanation:

They are traveling at the same speed, but the bowling ball has more mass.  The bowling ball has more kinetic energy because more force is needed to stop the rolling bowling ball. Two balls with different masses moving at the same speed have different amounts of kinetic energy.

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What is the pH of a solution with a concentration of 7.6 × 10–7 M H3O+?
Setler [38]

Answer:

Ph = 6.12....

here ya go

Explanation:

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7 0
3 years ago
Describe how wind, water, ice and gravity move soil through erosion below.<br> PLEASE ANSWER!!!! :D
8_murik_8 [283]

Answer:

Most erosion is performed by liquid water, wind, or ice (usually in the form of a glacier). If the wind is dusty, or water or glacial ice is muddy, erosion is taking place. The brown color indicates that bits of rock and soil are suspended in the fluid (air or water) and being transported from one place to another. This transported material is called sediment.

Explanation:

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3 0
3 years ago
How many moles are in 55 g or NaCk
seraphim [82]

Answer:

Explanation:

Ok, so I suppose you meant NaCl. But ok:

So we have the formula moles = grams/MM, where MM is molar mass. The molar mass of NaCl is 58.44 g/mol. That means that 55/58.44 is the number of moles which appears to be 0.94 moles.

4 0
3 years ago
The solubility of solid W in water is: 1.72 g/100 mL at 0°C, 21.3/100 mL at 100°C. a) How many mL of boiling water are required
grandymaker [24]

Answer:

a) Mass of solid W crystallized out 0°C is 141.564 g

b) 91.92% is the percent recovery.

Explanation:

The solubility of solid W in water at 100°C = 21.3 g/100 mL

Volume of water at 100C required to dissolve 154.0 g of W: x

\frac{154.0 g}{x}=\frac{21.3 g}{100 mL}

x=\frac{154.0 g\times 100 mL}{21.3 g}=723.0 mL

723.0 mL of water will dissolve 154.0 grams of solid W.

The solubility of solid W in water at 0°C = 1.72 g/100 mL

Mass of W soluble in 723.00 mL of water at  0°C = m

\frac{m}{723.0 mL}=\frac{1.72 g}{100 mL}

m=\frac{1.72 g\times 723.0 mL}{100 mL}=12.436 g

a) Mass of solid W crystallized out 0°C : 154.0 g- 12.436 g=141.564 g

b)  Percent recovery of solid at 0°C:

\frac{141.564 g}{154.0 g}\times 100=91.92\%

91.92% is the percent recovery.

5 0
3 years ago
Name the following Ionic Compound:<br><br> Fe2O3<br><br> (I believe this is Iron (III) Oxide)
svet-max [94.6K]

It is Iron 2 (Fe2) and Oxygen 3 (O3). Hope this helps!

4 0
3 years ago
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