The latent heat of fusion for Aluminium is 3.97 x 105. How much energy would be required to melt 0.75 kg of it?
Answer:
[tex]E = 2.9775\times10^5 J[/tex]
Explanation:
Given: The latent heat of fusion for Aluminum is [tex]L = 3.97\times10^5 J/Kg[/tex]
mass to be malted m = 0.75 Kg
Energy require to melt E = mL
[tex]E = 3.97\times10^5\times0.75 = 2.9775\times10^5 J[/tex]
Therefore, energy required to melt 0.75 Kg aluminum
[tex]E = 2.9775\times10^5 J[/tex]
help meh pls- i lazy
Answer:
the first question is B, if not then its C
Explanation:
sorry if I am wrong
A piece of brass of mass 20.0g is hung on a sprong balance from a rigid support and completely immersed in kerosene of density 8.0 ×10 kgm-³. Determine the reading on the spring balance(g =10m/s², density of brass =8.0×10kgm-³)
What force is caused by tiny collisions, called microwelds, on surfaces that
are stuck together?
A. heat
B. energy
C. air resistance
D. friction
Answer:
D. Friction
Explanation:
"Friction is caused by microwelds that form between two surfaces. Microwelds are stronger when the two surfaces are pushed together with a greater force." - ( Module 3 • Forces and Newton’s Laws) quoted
hope this helps and is right. p.s. i really need brainliest :)
Answer:
Friction
Explanation:
Took The Test
How would the motion of the book change if there was LESS friction as it moved across the table?
Answer:
The motion of the book would change if there was less friction if it moved across the table is that it would spin and have more kenetic energy.
Explanation:
friction slows stuff down so if it had less friction it would speed up and spin when sliding.
During a testing process, a worker in a factory mounts a bicycle wheel on a stationary stand and applies a tangential resistive force of 130 N to the tire's rim. The mass of the wheel is 1.70 kg and, for the purpose of this problem, assume that all of this mass is concentrated on the outside radius of the wheel. The diameter of the wheel is 50.0 cm. A chain passes over a sprocket that has a diameter of 8.75 cm. In order for the wheel to have an angular acceleration of 3.50 rad/s2, what force, in Newtons, must be applied to the chain
Answer:
The force that must be applied to the chain in order for the chain to have the given acceleration is approximately 694.2 N
Explanation:
The given restive force, [tex]F_f[/tex] = 130 N
The mass of the wheel, m = 1.70 kg
The diameter of the wheel, D = 50.0 cm
∴ The radius of the wheel, R = 50.0 cm/2 = 25.0 cm = 0.25 m
The diameter of the sprocket over which the chain passes, d = 8.75 cm
The radius of the sprocket over which the chain passes, r = 8.75 cm/2 = 4.375 cm = 0.04375 m
The angular acceleration, α = 3.50 rad/s²
Torque, τ = I·α
Where;
I = The moment of inertia = m·R²·α
The net torque = The applied torque - The friction torque
Therefore, we get;
I × α = m × R² × α = F × r - [tex]F_f[/tex] × R
1.70 kg × (0.25 m)² × 3.50 rad/s² = F × 0.04375 m - 120 N × 0.25 m
F = (1.70 kg × (0.25 m)² × 3.50 rad/s² + 120 N × 0.25 m)/(0.04375 m) = 694.214286 N
The force that must be applied to the chain in order for the chain to have the given acceleration, F ≈ 694.2 N
GIVING BRAINLIEST PLEASE HELP!!
-if you answer correctly ill give you brainliest which will give you 25pts-
A conductor is a material in which what can move through easily? Electrons Water Condensation Oil
Answer:
Electrons
Explanation:
:) hope this helps. Have a great day!
Two particles are placed near each other. Each has a charge of +2e. One particle exerts both an electric force Fe and a gravitational force Fg on the other particle.
Answer:
hi your question is incomplete below is the missing part of your question
Question : How does the direction and magnitude of Fe compare to Fg
answer : Not enough information is given
Explanation:
From the above information given in the question the direction and magnitude of FE cannot be compared to Fg and this is simply because the mass of the particle that force is been exerted on is not given therefore we cannot ascertain the magnitude of the gravitational force. Therefore we can conclude that not enough information is given
Dawn is trying to find out how much weight she can push across the room. She is really trying to find her __________. A. flexibility B. muscular endurance C. cardiovascular fitness D. muscular strength Please select the best answer from the choices provided. A B C D
Answer:
D. muscular strength
Explanation:
Lifting any weight requires force to lift it. This force is the result of the muscular strength of the body. It is the muscular strength that determines the weight that a body can lift without any exhaustion. Muscular strength depends on the size of the muscular fibers and the nerves' ability. They help in activating the strength of the muscle. Lifting the objects and the ability to lift it are the outcome of the strength muscles have.
In the given situation, Dawn is trying to find her muscular strength.
Answer:
d
Explanation:
d
When you are aware that you are having a dream and can control what you do
in that dream, it's called: ??
A. night terrors.
B. sleepwalking.
C. Stage 4 sleep.
D. lucid dreaming.
Answer:
D. lucid dreaming
Explanation:
(=^w^=)
If the current in a wire which is placed perpendicular to a magnetic field increases the force on the wire
Answer:
The force on the wire increases
Explanation:
Since the force on the wire F = BILsinФ where B = magnetic field strength, I = current in wire, L= length of wire and Ф = angle between the magnetic field and the wire.
Given that the magnetic field and the wire are perpendicular, Ф = 90°
So, F = BILsin90° = BIL
Since B and L are constant, F ∝ I
So, if the current in the wire increases, the force on the wire also increases.
Which one is the right andwerrrrrrrr
How objects on Earth are affected by gravitational force.
Answer:
The size of the gravitational force is proportional to the masses of the objects and weakens as the distance between them increases. Both objects exert an equal attractive force on each other: a falling object is attracting the Earth with the same size force as the Earth is attracting it
How many degrees equal π in radians? How many revolutions (turns) equal π radians?
Answer:
It follows that the magnitude in radians of one complete revolution (360 degrees) is the length of the entire circumference divided by the radius, or 2πr / r, or 2π. Thus 2π radians is equal to 360 degrees, meaning that one radian is equal to 180/π ≈ 57.295779513082320876 degrees.
Explanation:
1) Calculate the ideal efficiency of a heat engine that takes in energy at 800 K and expels heat to a
reservoir at 300K ?
Answer:
Could you explain that more better?
Explanation:
Please help me as soon as possible.
Answer:
true
Explanation:
please, pretty please help me!
Answer:
umm
Explanation:
1223565 578633 =334675
A 42.2 N force acts at 40* to the ground, causing the object to move a horizontal distance of 8.15 m. How much work was done on the object?
Answer:
W=F.dcos angle
w=42.2 x8.15 x cos40
w=343.93× cos 40
W=343.93 x 0.76
W=261.38 J
Work done on the object will be 264.83 J
What is work done ?Work done is the product of the component of the force in the direction of the displacement and the magnitude of this displacement.
given :
F = 42.2 N
let , x = 40°
horizontal distance (s) = 8.15 m
Work done = F s cos (x)
= F * s * cos (x)
= 42.2 * 8.15 * cos 40° = .766
= 343.93 * 0.77
= 264.83 J
Work done on the object will be 264.83 J
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Please help! What's the answer to this question, A 5.6 nC electric charge is placed in an Electric Field and experiences a force of 7.4 μN. What is the magnitude of the Electric Field at that location?
Answer:
1321 N/C
Explanation:
From the question,
Electric Field (E) = Electric Force(F)/Electric Charge(q)
E = F/q............ Equation 1
Given: F = 7.4 μN = 7.4×10⁻⁶ N, q = 5.6 nC = 5.6×10⁻⁹ C
Substitute these value into equation 1
E = ( 7.4×10⁻⁶)/(5.6×10⁻⁹)
E = 1.321×10³ N/C
E = 1321 N/C
Hence the magnitude of the electric field at that location is 1321 N/C
HELP!!!
A(n) ________ effect reddens the sun at sunset and sunrise.
•Diffuse
•Reflection
•Scattering
•Opaque
how does electricity work?
Answer:Electricity works by getting a bunch of conductor elements together and creating a flow of electron-stealing patterns through them. This flow is called a current. ... Once you can control the direction the electrons are going, you can use them to power or charge anything from a light bulb to your TV to your electric car.
Explanation:trust
Put the following objects in order by their
weights with the heaviest first.
A) a glass bottle filled with air at atmo-
spheric pressure:
B) a glass bottle filled with helium at at-
mospheric pressure;
C) an empty glass bottle (vacuum inside).
?? Physics
Answer:
I Think its ABC
Explanation:
No air is the lightest
Helium is lighter than regular air that's why it goes up so then the regular air would be heaviest.
PLEASE HELP!!
ESSAY: WESTERN POLITICAL THOUGHT
Here is your goal for this assignment:
Write an essay relating the political thoughts in the Declaration of Independence to the Bible
From an encyclopedia, the Internet, or another reference, read the second paragraph of the Declaration of Independence.
Copy each phrase that you think is part of the tradition of Western political thought (for example "all men are created equal").
In an essay of 300 words explain how each of these ideas is related to Biblical teaching.
Hint: Refer to the lesson "Theory, Practice, and Models" for a list of the Declaration's main thoughts that are a part of the tradition of Western political thought (bottom of page 1). Type your findings using proper grammar, punctuation, and spelling.
Proper documentation includes both parenthetical citations within the body of your report anytime you summarize or quote a source, as well as works cited page.
The question wants to analyze your writing and research skills. For that reason, I cannot write your essay, but I will show you how to write it.
This is the type of essay that requires a lot of research and interpretation, so you should start by searching for articles that analyze the Declaration of Independence, interpret it in detail and show relevant information about it and the concepts it presents.
After that, you should research how these concepts and ideas are treated in the bible. For that, you will need to search for more articles that show how the bible approaches these subjects.
After that, you can start your essay.
Essay StructureIntroduction: Introduce the subject of your essay in a short, succinct paragraph.Body: Write at least two paragraphs. In the first paragraph, you will present the concepts covered in the Declaration of Independence and how they are associated with biblical concepts. In the second paragraph, you will show how this affected society and what impact it has on America today. You will show evidence to support the information provided. This evidence will be taken from the articles you searched for.Conclusion: Summarize all the information provided and reinforce the importance of this topic.You can get more information on how to write essays at the link below:
https://brainly.com/question/683722
Answer:
“We hold these truths to be self-evident, that all men are created equal, that they are endowed by their Creator with certain unalienable Rights, that among these are Life, Liberty and the pursuit of Happiness." So, This is connected to the biblical worldview and teaching in the sense that everyone is created with an equal opportunity or chance to live. No one is created literally equal or we would all look the same, talk the same, and think the same. Instead, we all have an opportunity at life and to live. Also, we all have the right to pursue happiness. Sin provides a certain happiness in our lives. It provides short-term happiness that corrupts us. In the “Declaration of Indepence”, sin is a pursuit of happiness, but also doing good is too. They meant that we should pursue what God says is good happiness. For instance, doing nice things to people and serving them. This makes me happy and every other human being that is not narcissistic or a robot. That happiness is joy and it does not come from our circumstances, but from the happiness in our hearts that shows a relationship with God.
(a) If a force of 6 N is applied on a body of mass 4 kg, moving at a uniform
velocity, in the direction of its motion, find the resulting acceleration.
(b) If the above force is applied in the direction opposite to the direction
of motion of the body, find its deceleration.
Answer:
1.5 m/s ; - 1.5 m/s²
Explanation:
F = ma
F = Force ; m = mass of body ; a = Acceleration
Hence,
a = F/m
F = 6N applied in the direction of motion of the. Body
a = 6N / 4 kg
a = 1.5 m/s² in the direction of motion.
If the force is applied in the opposite direction of motion :
F = ma
a = F/m
a = 6 / 4
a = 1.5 m/s²
Simc efoece is applied in the opposite direction of motion :
We have a negative acceleration (deceleration) = - 1.5 m/s²
You are rolling a ball in a veiled by kicking it. You get tired and stop kicking the ball. What happens to the potential energy of the ball.
Answer:
The potential energy of the ball becomes 0
Explanation:
When kicking the ball, and it moves up, the potential energy of the ball increases. When the ball descends downwards, the potential energy of the ball reduces.
This is so because potential energy increases as height increases and decreases when there is a reduction in height.
So, when you stop kicking the ball and you place the ball on the floor, the ball becomes static (motionless); hence, the potential energy becomes 0.
Una botella vacía tiene una masa de 24.25g y de 86.55g completamente llena de agua, se vacia el agua y se llena nuevamente con 123.95g de solvente tetracloruro de carbono, ¿cual es la densidad del solvente?
Answer:
La densidad del tetracloruro de carbono es 1.990 gramos por centímetro cúbico.
Explanation:
La masa de agua contenida dentro de la botella es igual a la diferencia entre la masa pesada totalmente llena y la masa pesada totalmente vacía, es decir:
[tex]m_{w} = 86.55\,g-24.25\,g[/tex]
[tex]m_{w} = 62.3\,g[/tex]
Ahora, de acuerdo con la definición de densidad, la masa es directamente proporcional a la densidad, entonces, podemos calcular la densidad del solvente mediante la siguiente relación:
[tex]\frac{m_{x}}{m_{w}} = \frac{\rho_{x}}{\rho_{w}}[/tex] (1)
Donde:
[tex]m_{x}[/tex] - Masa del tetracloruro de carbono, en gramos.
[tex]m_{w}[/tex] - Masa del agua, en gramos.
[tex]\rho_{x}[/tex] - Densidad del tetracloruro de carbono, en gramos por centímetro cúbico.
[tex]\rho_{w}[/tex] - Densidad del agua, en gramos por centímetro cúbico.
Si sabemos que [tex]m_{x} = 123.95\,g[/tex], [tex]m_{w} = 62.3\,g[/tex] y [tex]\rho_{w} = 1\,\frac{g}{cm^{3}}[/tex], entonces la densidad del tetracloruro de carbono es:
[tex]\rho_{x} = \left(\frac{m_{x}}{m_{w}} \right)\cdot \rho_{w}[/tex]
[tex]\rho_{x} = 1.990\,\frac{g}{cm^{3}}[/tex]
La densidad del tetracloruro de carbono es 1.990 gramos por centímetro cúbico.
eating disorder Symptoms
Answer:
some symptoms can be lack of energy, and dizziness.
Explanation:
A fisherman sees 7 wave crests go by in 10.0 s. The crests are 2.43 m apart. Find the frequency of the wave. (Unit = Hz)
Answer: 0.7
Explanation:
A fisherman sees 7 wave crests go by in 10 s, with wavelength (λ) ia 2.43 m has the frequency of the wave is 0.7 hertz.
What is a wave?A wave is defined as the propagation of distrubance from one place to another. It can carries energy when it propagates into the medium without the net movement of the particles.
It refers to the variations or flow of energy without the transfer of mass of particles or matter. The waves can be visible or invisible. Light and sound are travel in the form of waves.
In waves, the wavelength, frequency, wavespeed and time period can be identified. Frequency refers to the number of oscillations takes place per unit time. It is measured in hertz (Hz).
Wavelength(λ) defines the distance travelled by the wave in a particular time in one vibration. It is also defined as the spatial period of the wave. It can be obtained by taking ratio between wavespeed and frequency. The unit of wavelenght is meter(m).
Wavespeed of the wave equals the wavelength and frequency. It defines the distance travelled/ number of meter covered by given time. Wavespeed (v) = wavelength (λ) / frequency (f). Its unit is m/s.
Time period is inversely proportional to the frequency (f). The time taken by the wave to complete its one oscillation is called time period. Time period = 1 / f . Its unit is seconds (s).
From the given,
time = 10 secs
no of waves = 7
wavelength = 2.43 m
To obtain frequency from the givens, the formula for frequency is:
frequency = no.of.cycles of waves / time taken
= 7 / 10
f = 0.7 hertz.
Hence, the frequency of the wave is 0.7 Hz for 7 waves and given time 10 s.
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Which of these provides the best explanation for why the pencil appears broken?
A. The pencil absorbs all the light rays that hit it
B. Water reflects light rays away from the pencil
C. Light rays are bent by the water in the glass
D. The surface of the water reflects lights rays
C. Light rays are bent by the water in the glass.
Explanation:
The light defracts as is it leaves the medium of air and enters the medium of the water/glass.
The link below is to a short video that explains this concept very well.
https://youtu.be/Iq1a_KJTWJ8