Answers
Answer:
See the answer below.
Explanation:
The latent heat of fusion is defined as the amount of energy needed to make a phase change from solid to liquid. And it can be calculated by means of the following expression:
[tex]Q_{fusion}=m*Dh[/tex]
where:
Qfusion = Heat Energy [J]
m = mass = 0.65 [kg]
Dh = latent heat fusion = 330000[J/kg]
[tex]Q_{fusion}=0.65*330000\\Q_{fusion}=214500[J][/tex]
2)
We know that energy can be calculated from power, where power is defined as the relationship between energy over time.
[tex]P=E/t[/tex]
where:
P = power = 60 [w]
E = energy [J]
t = time = 5 [min] = 300 [s]
[tex]E=P*t\\E=50*300\\E=15000[J][/tex]
The mass change due to the process is equal to:
[tex]m=282-274\\m=8[g]=0.008[kg][/tex]
Now using the following equation for the latent heat of Fusion, we can calculate this value:
[tex]Q=m*Dh\\Dh =Q/m\\Dh=15000/0.008\\Dh=1875000[J/kg][/tex]
Related Questions
Hi I need help with this question (see image ). Please show workings if necessary.
Answers
9514 1404 393
Answer:
63.4 °C
Explanation:
If we assume the "fixed points" are 0 °C and 100 °C, then the thermometer reading as a function of actual temperature can be described by a linear equation that must have (0, -0.5) and (100, 106) as solutions. We can use these points in the 2-point form of the equation for a line:
y = (y2 -y1)/(x2 -x1)(x -x1) +y1
y = (106 -(-0.5))/(100 -0)(x -0) -0.5
y = 106.5x -0.5
Then, for x = 60, the thermometer reading is expected to be ...
y = 106.5×60 -0.5 = 63.4 . . . °C
If the astronaut in the video wanted to move upward, in which direction should he throw the object? Why?
1.He should throw the object upward because according to Newton’s third law, the object will then exert a force on him in the same direction (i.e., upward).
2.He should throw the object upward because according to Newton’s third law, the object will then exert a force on him in the opposite direction (i.e., downward).
3.He should throw the object downward because according to Newton’s third law, the object will then exert a force on him in the opposite direction (i.e., upward).
4.He should throw the object downward because according to Newton’s third law, the object will then exert a force on him in the same direction (i.e., downward).
Answers
Answer:
3.
Explanation:
If the astronaut in the video wanted to move upward, he should throw the object downward because according to Newton’s third law, the object will then exert a force on him in the opposite direction (i.e., upward). hence, option (3) is correct.
What is Newton's third law of motion?Newton's Third Law states that if object A exerts a force on object B, then object B must apply a force to object A that is equal in magnitude and directed in the opposite direction.
This law represents a specific symmetry in nature: forces always exist in pairs, and no body can exert a force without also being subjected to one.
Hence, if the astronaut in the video wanted to move upward, he should throw the object downward and the object will then exert a force on him in the opposite direction (i.e., upward).
Learn more about Newton's third law of motion here:
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In the middle of your Fitness drug you start to feel a little weak selective method of monitoring your Fitness level which would be readily available to you at the least cost: A. Heart rate monitor B. Pedometer C. Talk test D. Stopwatch
Answers
Answer:
C. Talk test
Explanation:
The talk test would be readily available to me at the the least cost.
The talk test is about the easiest way that one can monitor intensity as they exercise. Because the only thing needed here is the ability to talk and to breathe.
The intensity lies on if one can talk and breathe at the same time. The harder one exercises, the more breathless they become and they find it difficult to talk.
Answer:
c
Explanation:
A compact car moving at 60 m/s has 320,000 J of kinetic energy. What is its mass?
Answers
Answer:
320,000J
Explanation:
mass=320,000J
which statement best describes a chemical reaction?
Answers
Answer:
a chemical reaction is a reaction that happens between two objects, like fire and a potion in chemistry
Explanation:
the reason is that the the fire causes the chemical to react, making a chemical reaction
PLEASE HELP !!!! Calculate the gravitational force between two objects when they are 0.850m apart. Each object has a mass of 6.00kg.
1. 2.96 x 10^-7
2. 2.22 x 10 ^-9
3. 3.3x10^-9N
4. 2.23x10^-8N
Answers
Formula: Fg = G[(m1•m2)/(r^2)]
Given:
r = 0.850m
m1 = 6 kg
m2= 6 kg
G = 6.674 • 10^-11
Fg= 6.674 • 10^-11[(6•6)/(0.850^2)]
= 6.674 • 10^-11[36/0.7225]
= 3.32545328 • 10^-9
= 3.33 • 10^-9 N
The sun has a mass of 1.99 x 10-30 kg. Saturn has a
mass of 5.68 x 10^26 kg. The distance between the sun
and Saturn is 1.43 x 10^12 m. Calculate the gravitational
force between the sun and Saturn.
Answers
Answer: The gravitational force between the sun and Saturn is [tex]3.69\times 10^{22}N[/tex]
Explanation:
[tex]F=\frac{Gm_1m_2}{r^2}[/tex]
where F = gravitational force = ?
G = gravitational constant = [tex]6.674\times 10^{-11} Nm^2kg^{-2}[/tex]
[tex]m_1[/tex] = mass of sun = [tex]1.99\times 10^{30}kg[/tex]
[tex]m_2[/tex] = mass of saturn = [tex]5.68\times 10^{26}kg[/tex]
r = distance between sun and saturn = [tex]1.43\times 10^{12}m[/tex]
[tex]F=\frac{6.674\times 10^{-11}Nm^2kg^{-2}\times 1.99\times 10^{30}kg\times 5.68\times 10^{26}kg}{(1.43\times 10^{12}m)^2}[/tex]
[tex]F=3.69\times 10^{-90}N[/tex]
Thus the gravitational force between the sun and Saturn is [tex]3.69\times 10^{22}N[/tex]
How is the 3rd law different from the 1st and 2nd laws?
Answers
Answer:
In the first law, an object will not change its motion unless a force acts on it. In the second law, the force on an object is equal to its mass times its acceleration. In the third law, when two objects interact, they apply forces to each other of equal magnitude and opposite direction.
Explanation:
Need answer ASAP!!!
Will give the brainliest for the correct answer!!!
What is the current of a circuit it the resistance is 20 ohms and the voltage is 100 V?
Answers
Hello!
Use ohm law:
I = V / R
Replacing:
I = 100 V / 20 O
I = 5 A
The current is 5 amperes.
Given two magnets, in which position will they attract? In which position will they repel?
Answers
Answer:
They will attract when its north and south but will repel when its south and south or north and north
WILL MARK BRAINLIEST
TRUE or FALSE?If you are an astronaut slowly drifting away from the space station, you might be able to drift back to the station by throwing a 5-kg tool rapidly in the direction that you are traveling (away from the station).
Answers
Answer:
yes every action as an equal and and opposite reaction. if you throw a tool then it will give you a reaction and you will move back.
Explanation:
According to Newton's third law of motion, when two bodies interact between them, appear equal forces and opposite senses in each of them.
To understand it better:
Each time a body or object exerts a force on a second body or object, it (the second body) will exert a force of equal magnitude but in the opposite direction on the first.
So, if you as an astronaut in the described situation throw your tool in the direction that you are traveling (in the opposite direction of the space station), according to Newton's third law, you will be automatically moving towards the station
what is the significance of the similar number and arrangement of bones in human arm and a bat wing
Answers
What is the difference between epicenter and focus?
Answers
Answer:
The hypocenter is the point within the earth where an earthquake rupture starts. The epicenter is the point directly above it at the surface of the Earth. Also commonly termed the focus.
Explanation:
What is the acceleration of a 7 kg mass if the force of 70 N is used to move it toward the Earth?
Answers
Answer:
10 m/s²Explanation:
The acceleration of an object given it's mass and the force acting on it can be found by using the formula
[tex]a = \frac{f}{m} \\ [/tex]
m is the mass
f is the force
From the question we have
[tex]a = \frac{70}{7} = 10 \\ [/tex]
We have the final answer as
10 m/s²Hope this helps you
can i get sum help ........................
Answers
It took the trip 40 minutes
1
Hope this helps
Select the correct images. Which images show chemical reactions?
Melting ice
mixer, nuts, bolts, washers
rusted nails
pastries
Answers
Answer:
Here you go! Hope it Helps
Explanation:
mixer, nuts, bolts, washers
and
rusted nails
Answer:
The Correct answer is rusted nails and pastries
Explanation:
I know because I had this as one of my questions and I did rusted nails and pastries and got it correct.
Hope this helps! :)
A bird flying towards its nest has a mass of 0.25kg and a kinetic energy of 40.5J. What is the speed of the bird?
Answers
Hope it’s correct
Which shows increasing entropy?
mowing a lawn
folding clothes
falling leaves
washing dishes
Answers
Answer:
mowing a lawn
Explanation:
Entropy is the degree of disorderliness of a system. As a body moves from a more ordered state to a less ordered one, the entropy of the system increases.
Mowing a lawn is a typical example of increasing entropy. When a lawn is being mowed, the grasses becomes disordered without any fixed orientation. Folding a clothe is trying to bring orderliness to the clothe patterning. Washing dishes will make one arrange them in an ordered way. Falling leaves brings leaves together.Answer:
Falling leaves!
Explanation:
I got it right on EDGE2021. ^^ Hope it helps!~ Remember, I'm proud of you. <3
What factors affect the amount of potential energy an object has?
Answers
Answer:
The factors that affect an object's gravitational potential energy are its height relative to some reference point, its mass, and the strength of the gravitational field it is in.
Explanation:
The factors that affect the amount of potential energy an object has are its mass, gravity, and height. This is further explained below.
What is potential energy?Generally, potential energy is simply defined as the energy held by a body as a result of its location with relation to others, internal tensions, electric charge, and other elements
In conclusion, The potential energy of a body is given by P.E=mgh
Read more about Energy
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The Electron Cloud Model shows shaded regions of probabilty where the electons most likely are at a given point in time. True False
Answers
Answer:
True
Explanation:
The statement is true because According to Schrödinger it's not possible to get the exact position of where an electron is located. However, he showed from an equation that we can at determine the most likely area where an electron will be and he said they are most likely to be in the most dense area of the clouds.
Answer:
it is true
Explanation:
plzzzzz helppppp plzzzzzzzzzzzzzzzzzzzzzzz
What happens when a wave enters a different material and slows down?
o
A. Refraction
o
B. Transmission
o
C. Reflection
D. AbsorptionWhat happens when a wave enters a different material and slows down?
o
A. Refraction
o
B. Transmission
o
C. Reflection
D. Absorption
Answers
Answer:
A
Explanation:
ap3x
Answer:
A. Refraction
Explanation:
<3
In the picture to the right, find the angle at which
the box is pulled if the work done is 50J
Answers
Answer:
42 °
Explanation:
From the question given above, the following data were obtained:
Force (F) = 45 N
Workdone (Wd) = 50 J
Distance (d) = 1.5 m
Angle (θ) =.?
Angle at which the box is pulled can be obtained as:
Wd = Fd × Cos θ
50 = 45 × 1.5 × Cos θ
50 = 67.5 × Cos θ
Divide both side by 67.5
Cos θ = 50 / 67.5
Cos θ = 0.7407
Take the inverse of Cos
θ = Cos¯¹ 0.7407
θ = 42.2 ≈ 42 °
Thus, the angle at which the box is pulled is approximately 42 °.
Define the difference between an independent variable (test variable) and a dependent variable (outcome variable) in a scientific experiment.
Answers
Answer:
Independent- isn't effected by the other variables and is changeable
dependent- is the outcome of the expirment and depends on the other variables
Answer:
a factor that changes due to the independent variable
Explanation:
If a galaxy is located 200 million light years from Earth, what can you conclude about
the light from that galaxy?
A. The light will travel a total of 200 million kilometers to reach Earth.
B. The light will travel 200 million kilometers per second to reach Earth.
C. The light will travel a total of 300,000 kilometers to reach Earth.
D. The light will take 200 million years to reach Earth.
please help :(
Answers
Answer:
D
Explanation:
It's quite simple actually, you see, what light years basically means is how many years light takes to travel from point a to point b. So here it says that a galaxy is 200 million light years away. So since that light is 200 million years away, it would take 200 million years until that light reaches us.
The more conductive an object is, the easier it is for neutrons to go through the object.
True
False
Answers
Answer:
false bcz neutrons do not move they r fixed in nucleus so it will. Fallse
what is projectile motion
Answers
[tex]\mathsf{what ~is~ a ~projectile ~motion?? }[/tex]
Answer:[tex]\large \underbrace{ \underline{ \sf projectile \: motion }}[/tex]
Projectile motion is when an object moves in a bilaterally symmetrical, parabolic path. The path that the object follows is called its trajectory. Projectile motion only occurs when there is one force applied at the beginning, after which the only influence on the trajectory is that of gravity.Some examples of Projectile Motion are Football, A baseball, A cricket ball, or any other object. The projectile motion is always in the form of a parabola which is represented as:[tex]\dashrightarrow\bold{y = ax + bx {}^{2}}[/tex]Phyllis is calculating the path of a space probe that will travel to Pluto. On the way to Pluto, the probe will pass Mars, Saturn, Jupiter, and Neptune.
Which of those planets exerts the greatest gravitational force?
Mars
Saturn
Jupiter
Neptune
Answers
Answer:
Jupiter
Explanation:
Answer:
jupiter
Explanation:
biggest planet strongest gravitational force
A force off 700 newtons is applied to a 600 kg bowling ball. What is the acceleration of the bowling ball once the force is applied?
Answers
Answer:
1.17 m/s²Explanation:
The acceleration of an object given it's mass and the force acting on it can be found by using the formula
[tex]a = \frac{f}{m} \\ [/tex]
f is the force
m is the mass
From the question we have
[tex]a = \frac{700}{600} = \frac{7}{6} \\ = 1.1666666...[/tex]
We have the final answer as
1.17 m/s²Hope this helps you
The interval shown here represents a _____.
strong base
weak base
weak acid
strong acid
Answers
Answer:
Strong acid
Explanation:
.... ..............
Which of the following is a measurement of acceleration?
O 33 km/h^2
O 20 m/s
O 300 m/s north
O 780 m/s^2 north
Answers
Answer:
D
Explanation:
i did that yesterday and your welcome homie b