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mash [69]
3 years ago
8

As an object falls freely near the earths surface , the loss in gravitational potential energy of the object is equal to its wha

t
Chemistry
2 answers:
Romashka [77]3 years ago
6 0

Answer:

Therefore the loss (transfer) of this potential energy is equal to the increase in kinetic energy

Explanation:

First remember that energy is not destroyed, it only transpires

There are different types of energy, an example of different types of energy is the heat energy (the one that is transferred from an object that is hotter to another, or also by friction), the gravitational potential energy (increases when the height of an object increases with respect to the zero point) another example would be the kinetic energy (increases with increasing the speed of an object)

When object "loses" energy is really transforming into another type of energy

While an object falls and loses its potential energy (it loses height) it increases its speed (it falls faster and faster), as its speed increases the kinetic energy increases

Therefore the loss (transfer) of this potential energy is equal to the increase in kinetic energy

Nitella [24]3 years ago
4 0
Increase in kinetic energy as well as energy loss to the surroundings in the form of heat ( negligible)
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5 0
3 years ago
Given the following chemical reaction: 2 O2 + CH4 CO2 + 2 H2O What mass of oxygen is required to completely react with 20 grams
Jobisdone [24]
The chemical equation is:
CH₄ + 2O₂ → CO₂ + 2H₂O

First, we calculate the moles of methane present using:
Moles = mass / molecular mass
Moles = 20 / 16
Moles = 1.25

Next, we may observe from the chemical equation that the molar ratio between methane and oxygen is 1 : 2
So the moles of oxygen required are 2 x 1.25
2.5 moles of oxygen required

Mass = moles * molecular mass
Mass = 2.5 * 32
Moles = 80

C. 80 grams O₂
4 0
4 years ago
How many electrons will a neon (Ne) atom have when it has no charge?
Darya [45]

Answer:

hope it helps you

Explanation:

Once one shell is full, the next electron that is added has to move to the next shell. So... for the element of NEON, you already know that the atomic number tells you the number of electrons. That means there are 10 electrons in a neon atom.

6 0
3 years ago
Balance it by oxidation number method:Zn +HNO3----Zn(NO3)2+NO+H2O​
timofeeve [1]

Answer:

Answer:

step 1:balance skeleton equation the chemical equation:

Zn +HNO3➔Zn(NO3)2+NO+H2O

step 2: identity undergoing oxidation or reduction

here

Zn➔Zn(NO3)2

Zn is oxidized from 0 to 2 in oxidation no.

HNO3➔NO

N is reduced from 5 to 2 in oxidation no

Step 3: calculate change in oxidation no.

change in oxidation no

in Zn=0-2=-2=2

in

N=5-2=3

Step 4: Balance it by doing crisscrossed multiplication

we get;

3Zn +2HNO3➔3Zn(NO3)2+2NO+H2O

step 6:Balance other atoms except H & O

3Zn +2HNO3➔3Zn(NO3)2+2NO+H2O

3Zn +2HNO3+6HNO3➔3Zn(NO3)2+2NO+H2O

finally: balance H

<em><u>3Zn +8HNO3➔3Zn(NO3)2+2NO+4H2O</u></em>

3 0
3 years ago
Read 2 more answers
Given 16.2 grams of substance Y, if the substance absorbs 2722 joules of energy and the specific heat of the substance is 9.22 J
snow_tiger [21]
Since the substance absorbs heat, it is expected that the temperature will rise. The formula for the internal energy of a substance is given by the equation:

ΔU = mCpΔT

where:

ΔU = internal energy
m = mass of substance
Cp = specific heat capacity of substance
ΔT = change in temperature

ΔU = 2722 Joules = 16.2 grams (9.22 J/g-°C) (Tf - 26°C)

This gives a final temperature of Tf = 44.22 °C
4 0
3 years ago
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