Please I need help with this question (see image).
Show workings where necessary.
Answers
Answer:
I think the reason why ice is forming on the aluminium lumps and not the beaker, is because:
The beaker is already on the same temperature as the mixture inside it: as a result, there is no heat transfer.
on the other hand, the Aluminium Lumps is at a way lower temperature than the mixture and as a result, there is heat transfer from the water around the lumps to the aluminium Lumps itself.
turning the water into ice.
Heat is lost from the water, and gained on the aluminium.
Since the water was turned to ice.
we can say that the final temperature of the heat transfer process is 0°C.
Notice that we'll be making use of the latent heat of fusion for ice. since water is being converted to ice at 0°C.( workout is in above attachment)
Related Questions
Stephanie is in volleyball practices and she notices something interesting about the
effect that spiking the ball has on her hand. She notices that the harder she hits the
ball, the more that her hand hurts afterward. Which Newton's Law explains why this
happens?
Answers
The Newton's law that explains the reason for the pain experienced by Stephanie when she spikes the ball is Newton's third law of motion.
Newton's third law of motion, states that, action and reaction are equal and opposite.
The force exerted on the ball when Stephanie spikes is equal to the reaction the ball exerts back on Stephanie. As the force Stephanie applied increases, the reaction she receive from the ball increases as well and the more pain she will feel.
Thus, we can conclude that, the Newton's law that explains the reason for the pain experienced by Stephanie when she spikes the ball is Newton's third law of motion.
Learn more here:https://brainly.com/question/23772134
What is a direct result of having greenhouse gases in the atmosphere?
Answers
Answer:
Well this is tough. I'm not sure but you are smart and can push through it. YOU DONT need the someone telling you the answer when it is inside you.
hope this helps p
If the force of gravity acting on the box is 88 N, what is the normal force acting on the box?
Answers
Answer:
88N
Explanation:
If the force of gravity acting on the box is 88N, then the normal force on the box is also 88N;
The force of gravity is the vertical pull of gravity on a body.
The normal force is the force a surface impresses on an object to prevent it from passing through.The normal force is equal to the gravitational force pull on a body.
So the solution is 88N
1. what is the average speed after two seconds?
2. after three seconds?
3. after 5 seconds?
4. what is the average speed between two and four minutes?
5. what is the average speed between four and five minutes?
Answers
Answer:
1. 75 speed, 2. 90 second = 1hr. 30 second. 3. 125 = 1hr 60 seconds 4.
Imagine you are an astronomer who recently discovered a new planet orbiting a distant star. Which set of characteristics would you use to classify this planet as an inner or terrestrial planet? Check all that apply.
-dense and solid
-very large
-thick atmosphere containing hydrogen and helium
-lacking a solid surface
-located near a star
Answers
Answer:
The right characteristics to be used for the classification include:
-dense and solid
-very large
-located near a star
Explanation:
The above listed characteristics are part of the characteristics used in classifying a planet as a habitable planet or non-habitable one. When a planet is closer to a star which revolves around it, this helps in supplying the needed light to it.
Answer:
dense and solid
located near a star
Explanation:
Which is a possible result of rising ocean temperatures caused by global warming?
formation of dust bowls
increase in strength of hurricanes
rapid evaporation of water in soil
decrease in population due to health threats
Answers
Answer:
Increase in strength of hurricanes
Explanation:
A possible result of rising ocean temperatures caused by global warming is an increase in the strength of hurricanes, which is the second option. As the ocean temperatures increase, more energy is available to fuel hurricanes, making them stronger and potentially more destructive.
What is global warming?Global warming is causing the earth's climate to change, which is having a significant impact on the world's oceans. As the temperature of the oceans increases, a variety of effects can occur. One of the most well-documented impacts is the increase in the strength of hurricanes. Hurricanes form over warm ocean waters, and as the water temperature rises, it provides more energy to the storm, making it more powerful.
Hence, a possible result of rising ocean temperatures caused by global warming is an increase in the strength of hurricanes, which is the second option.
Learn more about global warming here.
https://brainly.com/question/20632812
#SPJ5
Determine the mass of a boat that is propelled forward by a force of 1250N at an acceleration of 3 m/s2.
Answers
Answer:
416.6 KG
Explanation:
Due to the mass being missing from the equation you divide the force by the acceleration
A block attached to a spring with an unknown spring constant oscillates with a period of 2.0 s. What is the period if
Answers
Answer:
a) If the mass is doubled, then the period is increased by [tex]\sqrt{2}[/tex]. Hence, the period of the system is 2.828 seconds.
b) If the mass is halved, then the period is reduced by [tex]\frac{\sqrt{2}}{2}[/tex]. Hence, the period of the system is 1.414 seconds.
c) The period of the system does not depend on amplitude. Hence, the period of the system is 2 seconds.
d) If the spring constant is doubled, then the period is reduced by [tex]\frac{\sqrt{2}}{2}[/tex]. Hence, the period of the system is 1.414 seconds.
Explanation:
The statement is incomplete. We proceed to present the complete statement: A block attached to a spring with unknown spring constant oscillates with a period of 2.00 s. What is the period if a. The mass is doubled? b. The mass is halved? c. The amplitude is doubled? d. The spring constant is doubled?
We have a block-spring system, whose angular frequency ([tex]\omega[/tex]) is defined by the following formula:
[tex]\omega = \sqrt{\frac{k}{m} }[/tex] (1)
Where:
[tex]k[/tex] - Spring constant, measured in newtons per meter.
[tex]m[/tex] - Mass, measured in kilograms.
And the period ([tex]T[/tex]), measured in seconds, is determined by the following expression:
[tex]T = \frac{2\pi}{\omega}[/tex] (2)
By applying (1) in (2), we get the following formula:
[tex]T = 2\pi\cdot \sqrt{\frac{m}{k} }[/tex]
a) If the mass is doubled, then the period is increased by [tex]\sqrt{2}[/tex]. Hence, the period of the system is 2.828 seconds.
b) If the mass is halved, then the period is reduced by [tex]\frac{\sqrt{2}}{2}[/tex]. Hence, the period of the system is 1.414 seconds.
c) The period of the system does not depend on amplitude. Hence, the period of the system is 2 seconds.
d) If the spring constant is doubled, then the period is reduced by [tex]\frac{\sqrt{2}}{2}[/tex]. Hence, the period of the system is 1.414 seconds.
b. Find the velocity of a rider on the ride.
Given:
a =
r =
Unknown:
V =?
Equation:
a = v^2/r
Or
v^2 = a*r
Solution
Answers
D
Explanation:
Mutiply and alagrab to subterc
Please Help Me!!!.......
Answers
Answer:
D
Explanation:
Water has a high surface tension because the water molecules on the surface are pulled together by strong hydrogen bonds. That means a drop of water will "want" to have the smallest possible surface area.
help pls .. Which equation states Newton's second law?
Answers
Answer:
Choice C
m = F/a
Explanation:
[Force] F = [mass × acceleration] ma
× A) m = a/F → F ≠ a/m
× B) m = Fa → F ≠ m/a
✓ C) m = F/a → F = ma
× D) m = Fa/2 → F ≠ 2m/a
Answer:
ithink ....... sorry if it wrong
d
A box is pushed with a force of 15 N through a displacement of 6 m. What is the work done on the box?
Answers
Answer:
90J
Explanation:
as known that W=f×s
therefore 15×6
=90j
A motorcycle engine provides 473.3 N of force for 11.9 seconds. If the rider and the cycle have a mass of 2,068.3 kg, determine the change in velocity.
Answers
Answer:
After 11.9 seconds, the velocity will increase by approximately 2.7 m/s
Explanation:
Ignoring friction, we can simply say that the speed will increase by
11.9s × 473.3N / 2068.3kg
Which can be expressed as:
11.9s × 473.3kg·m/s² ÷ 2068kg
= (11.9 × 473.3 ÷ 2048.3) (kg·m/s² × s ÷ kg)
≈ 2.7 m/s
Which example of heat transfer is due mainly to convection?
Answers
7. The S.l. unit for force is
A. kg
C. m/s
B. m/s2
D. N
Answers
three advantages of simple machines.please tell fast
Answers
Answer:
they can help make clothing, they are useful for human like work, they are better than hand making
True or False. Light is a form of energy.
true or false
ASAP 10 POINTS
IF WRONG I WILL REPORT
Answers
trueee...................
Answer:
true
Explanation:
light is a form of energy which is radiation so true:)
A box on the ground is being pulled from the left and right by string. The box is accelerating to the left. What five forces are being used?
Answers
Answer:
push and pull,kinetic energy,force,and motion. I hope this helped if I get you this question wrong I deerly aploizge.
The Big Bang Theory was supported by the discovery of the
red shift in electromagnetic spectrum
gravitational force between planets
temperature of the universe
galaxies in the universe
Answers
How fast is a 85 kg football player moving if they have a momentum of 125 kg*m/s?
Answers
Answer:
v = 1.5 m/s
Explanation:
m = 85 kg
p = 125 kg m/s
v = ?
p = m v
125 kg m/s = (85 kg) (v)
v = (125 kg m/s) / (85 kg)
v = 1.47 m/s
What happens to the energy when the material is changed?
Answers
Answer: When a material is heated or cooled, two changes may happen to the particles within the material: Chemical bonds between the particles may form, break or stretch. There is a change in the chemical potential store of energy in the material. The material will heat up or cool down as the particles within it gain or lose speed.
Explanation:
You are researching a fungus that can kill banana plants. Which source is
likely to have the least reliable information?
A. An article in a popular science magazine
B. A press release about research on the fungus posted on the
website of a university
C. A posting about the fungus on a social media site
D. A report about the fungus on a nightly news show
Answers
Answer:
B
Explanation:
what could i say except ur welcome
Explained and elaborate further the function of assessing responsiveness
Answers
what substance is used by plants as a source of food
Answers
Answer:
dart
Explanation:
dart and sun and water so that the plant be okay
A big kid pushes a little kid and the little kid falls backward. The big kid remains relatively stationary. What best explains this
Answers
Answer:
Becase he pushed the little kid not himself
Explanation:
why is measurement important?
Answers
Answer:
Measurement is important so we could measure certain things right. By taking measurements we can have a knowledge of sizes, lengths, widths etc.
Explanation:
Does anyone know how to do this pleaseeeee
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]
If a certain test follows a normal curve, most of the scores will fall
A. at the top end
B. at the bottom end
C. all over the place
D. in the middle
Please select the best answer from the choices provided
Ο Α
OB
С
OD
Answers
Answer:
im pretty sure its d
Explanation:
What’s the main idea of this paragraph in one sentence?
Answers
Answer:
All forces are either balanced or unbalanced and each force acts in different ways.
Which statement about this figure is false
A. Line E represents a fault line.
B. Layer C is the youngest layer.
C. d,ike K is older than layer I.
D. The fault occurred after layer F formed.
Answers
The statement about the figure that is false is that d,ike K is older than layer I. That is option C.
What is cross-cutting relationships in geology?Cross-cutting relationships is a principle that when a body pass through different layers in geology, it is usually younger than all the layers it passed through.
That is to say that, d,ike K is younger than layer I, D and B which it passed through.
Learn more about fault lines here:
https://brainly.com/question/2938157
#SPJ1
Answer:
If it's not C then it HAS to be B.
Explanation:
By deductive reasoning.