How was our galaxy formed?

Answers

Answer 1

Answer:

according to big bang theory our galaxy was formed 13billion years ago and then made the stars and galaxies we see today. ... The universe began as a very hot, small, and dense superforce (the mix of the four fundamental forces), with no stars, atoms, form, or structure (called a "singularity).


Related Questions

Increased global temperature may lead to more forest fires, longer droughts, and loss of habitat. How will this effect many species? *

Answers

Answer:

Many species will be affected by increased global temperatures due to following reasons as mentioned.

As snow at poles will continue to melt and habitat for many species will be lost. This is create imbalance in the food chain of oceans which are prime source of food for many species. Some species will thrive as their hunters will be eradicated due to loss of habitat and overall food chain balance will be disturbed. This will cause species to go extinct.

The cycle of rain will be disturbed causing an imbalance in water cycle which will cause droughts and species will suffer and die eventually will go extinct.

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

Answers

Answer:

no i haven't done it

Explanation:

clean yo computer tho

The speed of light is 300,000,000 m/s. Red light has a wavelength of 0.0000007 m. What is its frequency?

Answers

Answer:

2.33..

Explanation:

f = wavelength/speed

= 0.0000007/300000000

= 2.333...

please answer this time question in do not send a link to an unknown website or you are getting reported.

Answers

(1) Use Newton's second law: The force F required to accelerate a mass m with acceleration a satisfies

F = m a

So the force needed to accelerate the lion-stretcher system is

F = (175 kg) (2 m/s²) = 350 N

(2) Average speed is defined as the ratio of distance traveled to the time it takes to travel that distance, so in this case the bus's average speed is

(280 km) / (4 h) = 70 km/h

(3) The vertical lines in the plot split up the distance function into 5-minute chunks. The one with the highest average speed is the one over which the distance changes the most. Roughly, the average speeds over each of the given choices is

• 0 to 5 min : (1500 m - 0 m) / (5 min) = 300 m/min

• 10 to 15 min : (3250 m - 2500 m) / (5 min) = 150 m/min

• 15 to 20 min : (3750 m - 3250 m) / (5 min) = 100 m/min

• 25 to 30 min : (4500 m - 4250 m) / (5 min) = 50 m/min

(4) Velocity is a vector, so it has both magnitude and direction. A car moving at constant velocity would be traveling at the same magnitude and direction. But a car on the circular track is constantly turning and changing direction.

Which feature causes a gap in the geologic record?

extrusion
fault
intrusion
erosion

Answers

Answer:

A                                    

Explanation:

Answer : a. Extrusion

HELPPPP PLSSS I NEED HELP

Answers

Answer:

D. Pearl Harbor

Explanation:

This picture clicked by me
How's it​

Answers

Answer:

Hey dear

U are a Nice photographer

The pic I awesome.

wow that looks really cool! 9/10

A car is traveling constant spoed ol 12 12 m/s When the driver accelerates, the car reaches a speed of 26 m/s in s What is the average acceleration of the

Answers

Answer:

Average acceleration of the car is 1.167 m/s^2

Explanation:

The speed of car with which it is travelling is 12 m/s

As the driver accelerates the car, the speed reaches 26 m/s

The change in speed in 12 seconds is

26 -12 = 14 m/s

Average acceleration is change in speed divided by time

[tex]\frac{14}{12} \\1.167[/tex] m/s^2

100 cm cubic of water is mixed with 50 centimetres cubic of concentrated acid of density 1.2 gram per centimetre cube assuming no change in volume find the average density of the mixture the density of water is 1.0 gram per centimetre cube​

Answers

Answer:

Average Density = 1.07 g/cm³

Explanation:

The average density of the whole mixture is given by the following formula:

[tex]Average\ Density = \frac{mass\ of\ whole\ mixture}{volume\ of\ whole\ mixture}[/tex]

where,

volume of whole mixture = volume of water + volume of acid

volume of whole mixture = 100 cm³ + 50 cm³ = 150cm³

mass of whole mixture = mass of water + mass of acid

mass of whole mixture = (volume of water)(density of water) + (volume of acid)(density of acid)

mass of whole mixture = (100 cm³)(1 g/cm³) + (50 cm³)(1.2 g/cm³)

mass of whole mixture = 160 g

Therefore,

[tex]Average\ Density = \frac{160\ g}{150\ cm^3}[/tex]

Average Density = 1.07 g/cm³

In the system shown above, the pulley is a uniform disk with a mass of .75 kg and a radius of 6.5 cm. The coefficient of friction between the 5.8 kg mass and the horizontal surface is .25, and the ropes does not slip on the pulley. They system is released from rest. Use work-energy principles to determine the kinetic energy of the (a) 2.8 kg mass and (b) the pulley after the 5.8 kg mass has moved 2.2 meters.

Answers

Answer:

i am answering the same question 3rd time

please find the answer in the images attached.

Which statement explains how planets move in orbit as supported by Newton’s first law of motion?

Planets can change the direction of their own orbital path.
Planets can change orbits due to their inertia.
Planets in motion will have a constant speed unless acted on by an outside force.
Planets with a greater mass will orbit more quickly than smaller planets.

Answers

the answer is c i think

Answer:

C. Planets in motion will have a constant speed unless acted on by an outside force.

Explanation:

Took the test

A hydrogen atom and a carbon atom move at the same speed. Which has the greater kinetic energy?

Answers

Answer:

The carbon atom has greater kinetic energy than a hydrogen atom.

Hope this helps! :)

Carbon atom has the greater kinetic energy.

What is meant by kinetic energy ?

Kinetic energy is defined as the energy attained by a body by virtue of its motion.

Here,

The speed of the hydrogen atom and carbon atom are the same.

Kinetic energy of hydrogen atom, KEн = 1/2 m(н) v(н)²

Kinetic energy of carbon atom, KEс = 1/2 m(с) v(с)²

where m and v are mass and speed respectively.

Taking the ratio,

KEн/KEс = m(н)/m(с)

KEн/KEс = 2/12

KEн/KEс = 1/6

KEс = 6KEн

Therefore the kinetic energy of carbon atom is 6 times the kinetic energy of hydrogen atom.

Hence,

Carbon atom has the greater kinetic energy.

To learn more about kinetic energy, click:

https://brainly.com/question/72216

#SPJ2

I can someone help me and also I gtg so ill be back in a bit

Answers

Answer: No sure what to do

Explanation: points for points

The horizontal distance between two nodes is 1.5 meters what is the wavelength of then standing wave

Answers

Answer:

[tex]\lambda=3\ m[/tex]

Explanation:

Given that,

The horizontal distance between the two nodes is 1.5 meters.

We need to find the wavelength of the standing wave.

If we know the distance between nodes and antinodes, then the equation is :

[tex]\dfrac{\lambda}{2}=D[/tex]

Where

[tex]\lambda[/tex] is the wavelength

So,

[tex]\lambda=2D\\\\=2\times 1.5\\\\=3\ m[/tex]

So, the wavelength of the standing wave is equal to 3 m.

4. Un móvil viaja en línea recta con una velocidad media de 1200 cm/s durante 9 s, y luego con velocidad media de 480 cm/s durante 7 s, siendo ambas velocidades del mismo sentido: a) ¿cuál es el desplazamiento total en el viaje de 16 s? B) ¿cuál es la velocidad media del viaje completo?

Answers

Answer:

A) El desplazamiento total del viaje es 14160 centímetros.

B) La velocidad media del viaje completo es 885 centímetros por segundo.

Explanation:

A) El desplazamiento es el producto de la velocidad media por el tiempo. El desplazamiento total es la suma de desplazamientos asociados a cada velocidad media, entonces:

[tex]x = \left(1200\,\frac{cm}{s}\right)\cdot (9\,s)+ \left(480\,\frac{cm}{s} \right)\cdot (7\,s)[/tex]

[tex]x = 14160\,cm[/tex]

El desplazamiento total del viaje es 14160 centímetros.

B) La velocidad media del viaje es el desplazamiento total dividido por el tiempo total, es decir:

[tex]\bar v = \frac{14160\,cm }{16\,s}[/tex]

[tex]\bar v = 885\,\frac{cm}{s}[/tex]

La velocidad media del viaje completo es 885 centímetros por segundo.

A vertical piston-cylinder device initially contains 0.1 m^3 of air at 400 K and 100 kPa. At this initial condition, the piston is resting on a stop. The piston-cylinder device is connected to a supply line with air at 400 K and a pressure of 500 kPa. The valve between the supply line and the piston-cylinder device is opened and is left open until the pressure in the piston-cylinder device reaches 500 kPa. The piston is observed to start moving when the pressure in the cylinder is 200 kPa and the piston continues to rise until it reaches a second stop. At the second stop, the piston-cylinder volume is 0.2 m^3 . The final temperature and pressure in the piston-cylinder device are 440 K and 500 kPa, respectively. Determine the heat transfer to or from the piston-cylinder device for the filling process Determine heat transfer (kJ) during the entire process.

Answers

Answer:

[tex]Q=-38.15kJ[/tex]

Explanation:

From the question we are told that

Piston-cylinder initial Volume of air [tex]v_1=0.1 m^3[/tex]

Piston-cylinder initial temperature [tex]T_1=400k[/tex]

Piston-cylinder initial pressure [tex]P_1= 100kpa[/tex]

Supply line temperature[tex]T_s=400k[/tex]

Supply line pressure [tex]P_s= 500kpa[/tex]

Valve  final pressure [tex]P_v=500kpa[/tex]

Piston movement pressure [tex]P_m=200kpa[/tex]

Piston-cylinder final Volume of air[tex]v_2=0.2 m^3[/tex]

Piston-cylinder final temperature [tex]T_2=440k[/tex]

Piston-cylinder final pressure [tex]P_2= 500kpa[/tex]

Generally the  equation for conservation of mass is mathematically given by

[tex]Q=m_2 \mu_2-m_1 \mu_1 +W-(m_2-m_1)h[/tex]

where

Initial moment

[tex]m_1=\frac{p_1 V_1}{RT_1}[/tex]

[tex]m_1=\frac{100*0.1}{0.287*400}[/tex]

[tex]m_1=8.7*10^-^2kg[/tex]

Final moment

[tex]m_2=\frac{p_2 V_2}{RT_2}[/tex]

[tex]m_1=\frac{500*0.3}{0.287*440}[/tex]

[tex]m_1=79*10^{-2}kg[/tex]

Work done by Piston movement pressure

[tex]W=Pd[/tex]

[tex]W=P(v_2-v_1)[/tex]

[tex]W=200(0.2-0.1))[/tex]

[tex]W=20000J[/tex]

Heat function

[tex]h=cT_1[/tex]

[tex]h=1.005(400)[/tex]

[tex]h=402[/tex]

Therefore

[tex]Q=(0.792*0.718(440)-0.0871*0.718(400)+20-(0.792-0.087)*402))[/tex]

[tex]Q=-38.15kJ[/tex]

It is given mathematically that the system lost  or dissipated Heat of

[tex]Q=-38.15kJ[/tex]

A car starts from rest with an acceleration of 5.0 m / s² and travels a distance of 1.0 km. What is the speed value of this car?

Answers

Answer:

100 m/s

Explanation:

We'll begin by converting 1 km to m. This can be obtained as follow:

1 km = 1000 m

Finally, we shall determine the final velocity of the car. This can be obtained as follow:

Initial velocity (u) = 0 m/s

Acceleration (a) = 5.0 m/s²

Distance (s) = 1000 m

Final velocity (v) =?

v² = u² + 2as

v² = 0² + (2 × 5 × 1000)

v² = 0 + 10000

v² = 10000

Take the square root of both side

v = √10000

v = 100 m/s

Therefore, the speed value of the car is 100 m/s.

Which of the following forces can change the motion of an object? A. push B. shove C. pull D. all of these

Answers

Answer: The answer is D all of these sorry if i am wrong

Explanation:

which vector is the sum of vectors a and b

Answers

Answer:

C

Explanation:

Vector A points up

Vector B points right

The combination must be both up and right which is C

who needs more body building food, a father or a child? Why?​

Answers

Answer:

A Child has a fast metabolism since it is growing fast it needs Food, Liquids, Sleep.

Explanation:

A father has already Grown and is only gaining age.

So we can Conclude that A child needs more body building food.

1. interpret data- based on the data, describe what alicia did.

2. draw conclusions- what conclusions can you draw? what does stirring do in terms of heat transfer?

help :(​

Answers

You can say something along the lines of “she created more surface area for heat to be radiated off the hot soup” (in terms of heat transfer).
As far as the conclusion goes, you can conclude that her hypothesis, date, research, and the scientific method was successful.

The mass of a body is 25 kg and the value of acceleration due to gravity is 9.8 m/s^2. Calculate the weight of body.​

Answers

Explanation:

weight=mass ×acceleration

weight=25×9.8

=245

W=mg
W= 25 * 9.8
W=245 kgm/s2
W=245N newton

Which of the following is the best example of a heat conductor?

Answers

Answer:

Anything with a dark shade in color and with no reflective surface or any metal

Explanation:

In this case, a dark shirt or blanket would be a heat conductor as well as metal would be, too

A paved blacktop parking lot was built on what was
once a soil-covered field. This area will now
experience increased runoff when rain occurs because
the paved parking lot has

A) less capillarity B) less permeability
C) greater infiltration D) greater porosity

Answers

Answer:

The answer is B. less permeability.

Explanation:

what celestial body is cloest to earth

Answers

Answer:

Mercury

Essentially because Mercury is closest to the Sun, when taking an average over time, Mercury is the closest planet to the Earth, and - in that measure - it is the closest planet to each of the other planets in the Solar System.

Explanation:

This important factor of survival for the coral reef is
a:symbiotic
b: abiotic
c: biotic
D:parasitic

Answers

Answer: biotic

Explanation:

the distance between a boy and a hill is 250 meters. if the boy shouts after how long will the echo be heard numerical problem​

Answers

Answer:

1.47 s

Explanation:

From the question,

s = 2d/t................... Equation 1

s = speed of sound in air, d = distance between the boy and the hill, t = time to hear the echo.

make t the subject of the equation

t = 2d/s............... Equation 2

Given: d = 250 meters

Constant: s = 340 m/s

Substitute these values into equation 2

t = (2×250)/340

t = 500/340

t = 1.47 s

What are tectonic plate boundaries?
A areas where Earth’s core experiences a high amount of stress
B areas where Earth’s core experiences a low amount of stress
C areas where Earth’s crust experiences a high amount of stress
D areas where Earth’s mantle experiences a high amount of stress

Answers

Answer:

c

Explanation:

Answer:

Areas where earth crust experiences a high amount of stress

Explanation:

FCAT review question

What is the main function of b-cells?


B. They attack cells of the body that are infected.


None of these


A. They create antibodies.


They signal other lymphocytes to go after the pathogens.

Answers

Answer: They create antibodies.

CAN SOMEONE PLEASE HELP FIGURE THIS OUT PLEASE

Answers

B is the answer hope this helped you
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Which expression is equivalent to this: "3 multiplied by z"? Click to read the passage from "The Nose," by Nikolai Gogol. Then answer thequestion.What tone is created by the passage's first sentence?O A. EerieB. Matter-of-factC. SensualD. Edgy Whats the answer to the question -7x + 15 = 36 25 points!!! please answer quick and best answer gets brainliest!The following question references the novel The Red Badge of Courage by Stephen Crane.The "subject" of a novel does NOT include which of the following?a.the charactersc.the opinion or message of the authorb.the settingd.the general plot and/or action I'm having some trouble on part B for this question, got no idea where to start on it. Any help? PLEASE HELP TIMED TEST What is the value of x in the matrix equation below?3-21810N3-1-7-4-3-1. How is protein related to nucleic acid? Explain how it came to be that finches of the Galapagos Archipelago have different beaks 1. Since 1963, the State of California has used the following rules for standardcar license plates Every license plate has the format ###AAA#, where # represents a numeral0-9 and A represents a letter A-Z. The first and third letter positions cannot be I, O, or Q (to avoidconfusion with mumbers 1, 0).How many license plates can the State of California issue that followthese rules? 8Which of the following is true about the age of rock layers and the age of the Earth?OA.The top layer in a sequence of rock layers is older than the Earth..The bottom layer in a sequence of rock layers is older than the Earth.OC.All rock layers are older than the Earth.OD.The Earth is older than any rock layer.+ find the value of given expression[tex] \sqrt{25 \times 5 - 2 {}^{2} } [/tex] How did Democratic Republican Thomas Jefferson expand the size of the country and the power of the president in one single purchase? Why is nose called a sense organ Lol help now files just type it Question 9 of 15What is a social platform?A system that is dedicated to the development and management of an organization's employee policies.A system that is dedicated to the development and management of customer relations.A system that enables the development, deployment, and management of human resources solutions andservices.A system that enables the development, deployment, and management of online interaction solutions andservices.I don't know this yet. Some do Please help A plane is at cruising altitude of 10,200 feet. If the angle of depression to the run way is 18 degrees, what is the distance, to the nearest foot, from the plane to the run way Write rational numbers between 0 and 1-----------------------------------------------------------------------------------------please also say how did you solve itthis question has 20 pointsI will mark you as Brillant if you answer it PLEASE HELP Four students are asked to describe a nebula and a star. Their responsesare shown in the table below. Which student described these twocelestial bodies correctly? *Student12.Student ResponsesDescription of a NebulaDescription of a StarA collection of hot gases that A sphere of dust and gases that containssometimes produces light from many elements and produces light fromnuclear reactionsfusion and fission reactionsA collection of hot gases thatresults from stars that haveA collection of gases from several nebulaeexplodedhot enough to cause a nuclear reactionA collection of dust and gases A sphele of matter with a density and athat forms stars or results from temperature great enough to cause adying starsnuclear reaction at its centerA collection of dust and gases A collection of hot gases that forms athat is found near starssphere but produces no light34Student 1Student 2Student 3Student A please help can you help i really need help like really this is so heard