has anyone done this???i need the last questions for 1 and 2

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]

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

Answer:

Could you explain that more better?

Explanation:

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

Answer:

Electrons

Explanation:

:) hope this helps. Have a great day!

Answer:

the first question is B, if not then its C

Explanation:

sorry if I am wrong

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.

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.

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.

Answer:

Explanation:Concave mirror​s can make a real image.when the object is away from the mirror it is called real image and when the object is closer to the mirror it is called virtual mirror.

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.

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:

Answer:

umm

Explanation:

1223565 578633 =334675

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

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

learn more about  Work done :

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Answer:

true

Explanation:

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

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

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

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.

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.

Learn more about the frequency, wavelength and wavespeed :

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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

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

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.

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

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.

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.

Answer:

some symptoms can be lack of energy, and dizziness.

Explanation:

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