A horizontal net force F is exerted on an object at rest. The object starts at x=0 m and has a speed of 4.0 m/s after moving 4.0 m along a horizontal frictionless surface. The net force F as a function of the object's position x is shown below

Answer:

Timezones exist because of rotation and revolution

Explanation:

As Earth rotates on its axis, it moves about 15 degrees every 60 minutes. After 24 hours, it has completed a full rotation of 360 degrees. The scientists used this information to divide the planet into 24 sections or time zones. Each time zone is 15 degrees of longitude wide.

Answer:

true

Explanation:

they have a reflecting surface that is recessed inward

Answer:Atomic model keep changing because the electrons around the nucleus are not fixed and they keeps rotating or changing their position in valence orbits around the nucleus.

Explanation:

Answer:

it should be be 40 hope this helps

Answer:

Pressure = 3000N/m²

Explanation:

Given the following data;

Force = 15N

Area = 0.5cm² to meters = 0.5/100 = 0.005m²

To find the pressure;

Pressure = Force/area

Substituting into the equation, we have:

Pressure = 15/0.005

Pressure = 3000N/m²

Answer:

39

Explanation:

calculator

Answer:

39 is the answer. of your questions

Answer:

wire By please mark my answer in brain list

Answer:

Remove wire G, if the wire after it is F. Remove wire A as C is connecting to it already.

That's the pickup truck.

Explanation:

Here it is.

The thermal energy needed to melt 1.25 kg of water at its melting point is 416.25 kJ.

The latent heat of fusion is the amount of thermal energy required to change the phase of a substance from a solid to a liquid state without a change in temperature.

When a substance is in a solid state, the molecules are packed closely together and are held in a rigid structure by intermolecular forces. As heat is added to the solid, the temperature of the substance increases until it reaches the melting point, which is the temperature at which the solid starts to change into a liquid.

At the melting point, the added thermal energy is used to break the intermolecular bonds that hold the molecules in the solid structure. The energy absorbed during this process causes the molecules to become less ordered and to move more freely, resulting in a liquid state. However, during the melting process, the temperature of the substance remains constant until all of the solid has melted.

The latent heat of fusion is a property of the substance and is defined as the amount of energy required per unit mass to change the phase from solid to liquid. It is usually measured in units of joules per kilogram (J/kg) or kilojoules per kilogram (kJ/kg).

The latent heat of fusion is an important concept in thermodynamics and is used in many applications, such as the melting of ice, the solidification of molten metals, and the formation of igneous rocks.

Here in the Question,

To calculate the thermal energy needed to melt 1.25 kg of water at its melting point, we can use the formula:

Q = mass x latent heat of fusion

where Q is the thermal energy required, and the latent heat of fusion is the amount of energy required to change the phase of a substance from solid to liquid without changing its temperature.

Substituting the given values, we get:

Q = 1.25 kg x 333 kJ/kg

Q = 416.25 kJ

Therefore, 1.25 kilogram of water requires 416.25 kJ of thermal energy to melt at its melting point.

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Answer:

Using the data in the table scientists, students, and others that are familiar with the periodic table can extract information concerning individual elements. For instance, a scientist can use carbon's atomic mass to determine how many carbon atoms there are in a 1 kilogram block of carbon.

Explanation:

HOPE THIS HELPS LIKE AN RATE PLZ

Answer:

Within each element square, information on the element's symbol, atomic number, atomic mass, electronegativity, electron configuration, and valence numbers can be found. At the bottom of the periodic table is a two row block of elements that contain the lanthanoids and actinides.

Explanation:

please mark brainliest please

Answer:

Variation

Explanation:

Answer:

Image result for Why does the Moon appear red during a lunar eclipse?

A lunar eclipse takes place when the sun, Earth and moon line up in space. The moon passes through Earth's shadow. ... Bottom line: The moon can look red during a total lunar eclipse because of sunlight that's filtered and refracted by Earth's atmosphere

Answer:

Answer:

K=50N/cm

Explanation:

Force can be calculated using below expresion;

F=ke

where f = force,

k =spring constant,

e = extension

force = 500 N

e= 10 cm =

Then substitute, the given values

500=10 × k

k=500/10

K=50N/cm

Answer:

it could be either or because it doesnt just depend on the height but it also depends on the pressure but then again the question didnt ask anything about the pressure so the answer should be true

Explanation:

Answer:

hundred metre race on sports day started by a gun firing when the gun is fired a pop of smoke comes out of the gunners will you suggest about trigonometry right here is the sound of the explosion before or at it seems of of smoking containers out of the governor ke this answer about something I don't know I am sorry

Answer:

20

Explanation:

[tex]100 \times 0.2 = 20[/tex]

Answer:

1.96 kg * m2/s2

Explanation:

Answer:

The shadow would be on your left side.

Explanation:Give brainliest if this helped :)

Answer:

Magnitude, direction

Explanation:

Magnitude, direction

Answer:

4.2 m/s

the balls final speed is V (m/s)

because the clay ball hits another and the two stick together

=> 0,35.4,2 + 0,35.4,2 = (0,35 + 0,35).V

<=> 2,94 = 0,7V

<=> V = 2,94/0,7 = 4,2

For a clay ball with a mass of 0.35 kg, the ball's final speed is mathematically given as

V2= 4.2

Question Parameter(s):

A clay ball with a mass of 0.35 kg

Hits another 0.35 kg ball at rest and the two stick together.

The first ball's initial speed is 4.2m/s.

Generally, the equation for the conservation of momentum is mathematically given as

M1v1=m2v2

Therefore

0.35*4.2 + 0.3*5.4.2 = (0.35 + 0.35)*V

2,94 = 0,.7V

V2 = 2.94/0.7

V2 = 4.2

In conclusion

V2= 4.2

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Answer:

They will Attract each other and act like magnets

Explanation:

When 2 positive or 2 negative particles are near each other they repel. When 2 neutral particles are together they do nothing, but when a positive and a negative are together their charges sort of overlap each other and they attract.

Answer:false

Explanation:

Answer:

Adiabatic

Explanation:

Adiabatic is defined as a process in which no heat transfer takes place.

Answer:

C

Explanation:

Electromagnetic waves are produced by the vibration of charged particles.

The true statement of an electromagnetic wave is option c. The wave is caused by vibrating particles of matter.

It is the wave that should be developed that leads to the vibration that lies between the electric field and a magnetic field.

Here EM waves should be composed for oscillating magnetic and electric fields.

Hence, the option c is correct.

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Answer:

B. Friction

Explanation:

It represents electrons. The moving electrons show current passing through the wire

In revolution, the earth revolves around the sun. In rotation, the earth rotates about its own axis.

Answer:

An object changes position if it moves relative to a reference point. The change in position is determined by the distance and direction of an object's change in position from the starting point (displacement). Direction • Direction is the line, or path along which something is moving, pointing, or aiming.

Explanation:

Answer: An object changes position if it moves relative to a reference point. The change in position is determined by the distance and direction of an object's change in position from the starting point (displacement). Direction • Direction is the line, or path along which something is moving, pointing, or aiming.

Explanation: BRAINLIEST?