<u>Hello and Good Morning/Afternoon</u>:
<em>Original Question: C₂H₅OH + __O₂ → __CO₂ + __ H₂O</em>
<u>To balance this equation</u>:
⇒ must ensure that there is an equal number of elements on both sides of the equation at all times
<u>Let's start balancing:</u>
- On the left side of the equation, there are 2 carbon molecule
⇒ but only so far one on the right side
C<em>₂H₅OH + __O₂ → 2CO₂ + __ H₂O</em>
- On the left side of the equation, there are 6 hydrogen molecules
⇒ but only so far two on the right side
C<em>₂H₅OH + __O₂ → 2CO₂ + 3H₂O</em>
- On the right side of the equation, there are 7 oxygen molecules
⇒ but only so far three on the left side
C<em>₂H₅OH + 3O₂ → 2CO₂ + 3H₂O</em>
<u>Let's check and make sure we got the answer:</u>
C<em>₂H₅OH + 3O₂ → 2CO₂ + 3H₂O</em>
<em> 2 Carbon ⇔ 2 Carbon</em>
<em> 6 Hydrogen ⇔ 6 Hydrogen</em>
<em> 7 Oxygen ⇔ 7 oxygen</em>
<u>Thefore the coefficients in order are</u>:
⇒ 1, 3, 2, 3
<u>Answer: 1,3,2,3</u>
Hope that helps!
#LearnwithBrainly<em> </em>
False. False.
A lunar eclipse occurs only when the moon is full.
A solar eclipse occurs only when the moon is new.
1)
At the starting point, the spring releases potential energy which is converted to kinetic energy of the truck. The formula fr calculating the elastic potential energy of the spring is expressed as
PE = 1/2kx^2
where
x is the extension of the spring
k is the spring constant
From the information given,
k = 8500
x = 7
Thus,
PE = 1/2 x 8500 x 7^2 = 208250 J
Since elastic potential energy of spring = kinetic energy of the truck, it means that
Kinetic energy = 208250
The formula for calculating kinetic energy is expressed as
KE = 1/2mv^2
where
m = mass of truck
v = velocity of truck
From the diagram,
m = 600
Thus,
208250 = 1/2 x 600 x v^2
208250 = 300v^2
v^2 = 208250/300 = 694.17
v = square root of 694.17
v = 26.35 m/s
The velocity at which the truck is moving is 26.35 m/s
The potential energy of the truck at that point is calculated by apply the formula,
Potential energy = mgh
where
g = acceleration due to gravity and its value is 9.81 m/s
h is the height of the truck and it is 20
m is the mass of the truck and it is 600
Thus,
Potential energy = 600 x 9.81 x 20 = 117720
Mechanical energy = potential energy + kinetic energy
Mechanical energy = 208250 + 117720 = 325970 J
Answer: The light is slowed down by the prism, but the different wavelengths of light are all slowed down a different amount by the prism.
Explanation:
What happens here is that white light passes from a medium with an specific index of refraction (air) to another medium with a different index of refraction (the material of which the prism is composed).
Then, when light passes from a medium to another, its speed changes causing the deviation of the beam of light. However, we are talking about white light that is composed of different wavelenghts. So, since the frequency of light remains costant when passing from one medium to another, the different wavelengths change as a result of the change in speed.
This was first observed by Isaac Newton in the eighteenth century, when he found out that when a beam of light from the Sun, passes trhough a prism is decomposed in many different colors.
