On average, how many stars would we have to search before we would expect to hear a signal? assume there are 500 billion stars in the galaxy.

Answers

Answer 1

We would have to search at least 5,000,000,000 (5 billion) stars before we would expect to hear a signal.

To find out the number of stars that we will need to search to find a signal, we need to use the following formula:

total of stars/civilizations500,000,000,000 (500 billion) stars / 100 civilization = 5,000,000,000 (5 billion)

This shows it is expected to find a civilization every 5 billion stars, and therefore it is necessary to search at least 5 billion stars before hearing a signal from any civilization.

Note: This question is incomplete; here is the complete question.

On average, how many stars would we have to search before we would expect to hear a signal? Assume there are 500 billion stars in the galaxy.

Assuming 100 civilizations existed.

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Related Questions

What does electrical energy transform into when used by objects in a home?

Answers

Answer:

What can electrical energy be transformed into?

Electrical energy is transformed into many forms - mechanical/kinetic, sound, heat, light, and other forms of electromagnetic radiation - by everyday appliances.

Explanation:

Answer:

none of the other answers could be correct.

Explanation:

The sun nuclear energy transfers to radiant energy A fire Chemical energy transfers to thermal and radiant energy. wind turbine Kinetic motion energy transfers to electrical energy. Lightbulb Electrical energy transfers to radiant and thermal energy. Radio Electrical energy transfers to sound energy.

how many band is the parametric microphone equalizer?

Answers

Answer:

3 bands

Explanation:

Basically, the Parametric EQ divides the audio spectrum into three bands, allowing you to enhance (or suppress) the level in that range.

how much brighter is Vega than the Sun? (astronomy)

Answers

Answer: 60 times brighter

Write a paragraph explaining how a pressurized garden sprayer works. Make sure todescribe what happens to the air pressure insidethe sprayer as it is pumped by hand.

Answers

The principle of operation of a pressurized garden sprayer is as follows;

A pressurized garden sprayer is a chamber which is filled with a liquid which can be a lubricant, paint or chemical, then filled with compressed air to allow the liquid to be sprayed at high pressure.

As it is pumped by hand, the compressed air with which it is filled serves the primary purpose of allowing the liquid to be sprayed at high pressure - an important requirement for performance characteristics of the sprayer.

Flammable liquids must not be used with such equipment.

Read more on pressurized sprayers:

https://brainly.com/question/8842747

4) What is the kinetic energy of o 5 kg object moving at a velocity of 25 m/s?

Answers

Ek = 1/2 mv^2

= 1/2 × 5 × (25)^2

= 1562.5 J

It requires a 70.4 N force (parallel to the inclined plane) to pull a 5.86 kg box up a 58.1° inclined plane with a rope at a constant speed. (a) What is the coefficient of kinetic friction between the inclined plane and the box?
(b) If the rope were to break, what acceleration would the box experience as it slid down the ramp?

Answers

Answer:

0.667; 4.965

Explanation:

Look at the picture I attached for the force analysis.

a) The coefficient=Friction/Normal Force. Because it's at constant speed, the force of friction + mgsin58.1° (because it's on an inclined plane and has split forces) is equal to the applied force (70.4N). Normal force is not equal to weight force though, because the box is on an inclined plane; it's equal to mgcos58.1°.

b) If it were to break, then the box no longer has an applied force, and the direction of friction has changed to up the inclined plane. F=m/a, so acceleration = mgsin58.1°- Friction/mass

astronauts appear weightless while working in the international space station because

Answers

cause there's no gravity therefore they appear weightless

Part A
As an object moves around, on which quantities does the change in its gravitational potential energy depend? Choose all that
apply.

Answers

As expressed by the equation, potential energy depends upon the mass and the height of the object. Any increase in these two quantities will lead to an increase in the amount of potential energy possessed by the object.

scientific notation. jst 11a

Answers

Answer:

2 * 10^4

Explanation:

(3 * 10^4)(4 * 10^4) / (6 * 10^4)

= (12 * 10^8)/(6 * 10^4)

= 2 * 10^4

A vector consists both?

Answers

Answer:

magnitude and a direction

Explanation:


Force = 30 N. Mass = 5 kg. Calculate Acceleration

Answers

Answer:

Explanation:

from F=ma, 30=5a, a=6

Ana wonders how light can affect a mystery material. The table below shows what happens when different types of light hit the mystery material.

Answers

The light can definitely change the mystery material. This can occur through a change in temperature or color (option C).

A material is affected by light mainly if the material absorbs the light. Based on the chart, we know this mystery material can absorb two types of light:

Red light.Yellow light.

Moreover, this phenomenon can lead to two main changes:

Change in temperature: Light affects materials by increasing their temperature of these. A common example is the way the temperature of an object increases if it is exposed to sunlight.Change in color: Some materials react to light by changing their color.

Based on this, the material can change its color or temperature.

Note: This question is incomplete; here is the missing part:

A. Yes, but the mystery material can change in only one way, such as by getting warm, because all the light that a material absorbs will affect that material in the same way.

B. No. The mystery material can’t change because the light is not a physical thing. Light cannot change physical things like the mystery material.

C. Yes and the mystery material can change in one or two different ways, such as by getting warm and/or changing color, because different types of light can cause different changes to a material when they are absorbed.

D. There is no way to know whether the mystery material will change or not.

Learn more about sunlight in: https://brainly.com/question/1603783

On a frictionless surface how much force is necessary to accelerate a 0.49 kg object to the left at 4.8 m/s2?

Answers

Answer:

2.35 N

Explanation:

The force acting on an object given it's mass and acceleration can be found by using the formula

force = mass × acceleration

From the question

force = 0.49 × 4.8 = 2.352

We have the final answer as

2.35 N

Hope this helps you

A well chosen lifetime activity is something that should hold a person's interest for a long time.



Please select the best answer from the choices provided.



T

F

Answers

Answer:

true

Explanation:

as long as you are interested, you are happy

Since lifetime activities are done for a lifetime, it is true that a well chosen lifetime activity is something that should hold a person's interest for a long time.

What is a lifetime activity?

A lifetime activity is an activity which an individual decides to do for a lifetime.

A lifetime activity should be able to hold a person's interest for a long time, else it could lead to frustration.

Some lifetime activities include:

choice of careersmarriage family relationships

Therefore, it is true that a well chosen lifetime activity is something that should hold a person's interest for a long time.

Learn more about lifetime activity at: https://brainly.com/question/1458028

If someone can help that would be cool

Answers

Answer:

  1.5 cm

Explanation:

The ratio of areas is the square of the ratio of diameters, so cylinder A has (1/2)^2 = 1/4 the area of cylinder B.

The volume of the cylinder is jointly proportional to its area and its height. So, for a fixed volume, the height is inversely proportional to the area.

Cylinder B has 4 times the area of cylinder A, so any volume moved from cylinder A to B will require only 1/4 of the change in height that is required in cylinder A.

The red piston in cylinder B rises 1.5 cm.

hlo anyone help
a stone is thrown upward with the kinetic energy of 10 joule if it goes up to a maximum height of 5 M find the initial velocity and mass of the stone??
Ty no spam plz help rn

Answers

Explanation:

Here, kinetic energy of the body, K.E=10 J

Height attained by the body, h=5 m

h=5m

When the body attains maximum height, its kinetic energy is converted into potential energy.

P.E=K.E

⟹mgh=10

⟹m= 10/gh

= m = 10/(10×5) =0.2 kg (taking the value g as 10m/s²)

Now, ½mv²=10

0.2×v²=20

v²=20/0.2

v²=100

v=√100

v=10m/s.

hope this helps you.

[tex]\huge \bf༆ Answer ༄[/tex]

Let's solve ~

As we know the total energy [P.E + K.E = C] of the system remains constant throughout the motion,

So, When a stone was thrown initially it didn't had any potential energy (P.E = 0) but had kinetic Energy of 10 joules.

So, total energy = P.E + K.E = 0 + 10 = 10 joules

As per the given information, equate it with the formula.

[tex] \sf \dfrac{1}{2}m {v}^{2} = 10[/tex]

[tex] \sf m {v}^{2} = 20[/tex]

Now, As it approaches 5m height it comes to rest, Therefore velocity = 0. And since velocity = 0 then Kinetic Energy = 0

Now, let's find the Potential Energy at that point ~

[tex] \sf mgh[/tex]

[tex] \sf m \times 10 \times 5[/tex]

[tex] \sf50m[/tex]

And here, the Total energy = P.E + K.E = 10 Joules

So,

[tex] \sf50m + 0 = 10 [/tex]

[tex] \sf50m = 10[/tex]

[tex] \sf m = 10 \div 50[/tex]

[tex] \sf m = 0.2[/tex]

Therefore, mass of the object is 0.2 kg = 200 grams

Now, plug the value of mass (m) in the equation of kinetic Energy to find the initial velocity of the stone ~

[tex] \sf m {v}^{2} = 20[/tex]

[tex] \sf0.2 \times {v}^{2} = 20[/tex]

[tex] \sf {v}^{2} = 20 \div 0.2[/tex]

[tex] \sf v = \sqrt{100} [/tex]

[tex] \sf v = 10 \: \: ms {}^{ - 1} [/tex]

Hence, velocity of the particle at the beginning was 10 m/s

You plug your microwave into an outlet and then you heat up a piece of pizza in it. This is an example of an...

Answers

Microwave Radiation????????????

rube goldberg machine steps

Answers

Answer:

Rube Goldberg Machine is "a comically involved, complicated invention, laboriously contrived to preform a simple operation." 2. What are the 6 Simple Machines? A. The 6 Simple Machines are: wedge, screw, lever, wheel and axel, inclined plane and pulley.

. What material does sound move quicker through?
Water
Air
Steel

Answers

Answer:

steel

Explanation:

the close molecules in solids allows sound to travel at a faster speed

Sound will move quicker through Steel than in water and air.

Sound: This can be defined as an audible form of energy, that is radiated outward from a source.

⇒ Generally,

Sound wave travels fastest in solid,  more than in liquid or gas. This is because the molecules of solid are more closely together.

⇒ From the question above,

Water is a liquid materialAir is a gaseous materialSteel is a solid material

Therefore, sound will move quicker through Steel than in water and air.

Hence: sound will move quicker through Steel than in water and air.

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What is the force of gravity?

Answers

Answer:

2. 4.63 x 10 to the -11th power

Explanation:

m1 = 3.1, m2= 6.3, d = 5.3, G = 6.67 × 10^-11

m1 · m2 = 3.1 · 6.3 = 19.5

d² = 5.3² = 28.1

19.5/28.1 = 0.694

(6.67 · 10^-11) · 0.694 = 4.63 × 10^-11

Answer:

Natural phenomenon

Explanation:

Gravity, or gravitation, is a natural phenomenon by which all things with mass or energy—including planets, stars, galaxies, and even light—are attracted to one another.

Examples of this can be:

The force that holds the gases in the sun.

The force that causes a ball you throw in the air to come down again.

The force that causes a car to coast downhill even when you aren't stepping on the gas.

The force that causes a glass you drop to fall to the floor.

**BRAINLIEST** How does the Combining Vinegar and Baking Soda table represent the law of conservation of matter when baking soda and vinegar are combined?

Answers

Basically your liquid will go over the line because you are adding more mass. the balloon will inflate because  of mass filling it.  Part 1  I noticed that there was a change from the original line.   part 2  Some mass is lost. The bubbles are the gas leaving. The balloon increases in size because of the mass. The cup got heavier when I added the vinegar.

Gas leaving caused the bubbles.

A child on a spinning ride at a playground has a centripetal acceleration of 0. 80 m/s2. The child completes a full circle every 4. 2 s. How far from the center of the ride is the child? 0. 068 m 0. 085 m 0. 27 m 0. 36 m.

Answers

The distance of the child from the center of the ride is 0.28 m.

The given parameters;

Centripetal acceleration of the child, a = 0.8 m/s²Number of revolution, = 1 rev per 4.2 s

The angular speed of the child is calculated as follows;

[tex]\omega = \frac{1 \ rev}{4.2 \ s} \times \frac{2 \pi \ rad}{1 \ rev} \\\\\omega = 1.5 \ rad/s[/tex]

The radius of the circle is calculated as follows;

[tex]a_c = \omega ^2 r\\\\r = \frac{a_c }{\omega ^2} \\\\r = \frac{0.8}{1.5^2} \\\\r = 0.28 \ m[/tex]

Thus, the distance of the child from the center of the ride is 0.28 m.

Learn more about angular speed here: https://brainly.com/question/6860269

car was moving in a straight road of length 320 km it covered 240 km with an average velocity 75 km/hr then it ran out of fuel and stopped for 0.6 hr until it was refueled and completed its journey with a velocity 100 km/hr so the average velocity during the whole journey

Answers

The average velocity of the car for the whole journey is 69.57 km/h.

The given parameters:

Length of the road, L = 320 kmDistance covered = 240 km at 75 km/htime spent refueling, t₂ = 0.6 hrFinal velocity, = 100 km/hr

The time spent by the before refueling is calculated as follows;

[tex]t = \frac{d}{v} \\\\t_1 = \frac{240}{75} \\\\t_1 = 3.2 \ hours[/tex]

The time spent by the car for the remaining journey;

[tex]t_3 = \frac{320 - 240}{100} \\\\t_3 = 0.8 \ hr[/tex]

The total time of the journey is calculated as follows;

[tex]t = t_1 + t_2 + t_3\\\\t = 3.2 \ hr \ + \ 0.6 \ hr \ + \ 0.8 \ hr\\\\t = 4.6 \ hours[/tex]

The average velocity of the car for the whole journey is calculated as follows;

[tex]v = \frac{total \ distance }{total \ time} \\\\v = \frac{320}{4.6} \\\\v = 69.57 \ km/h[/tex]

Learn more about average velocity here: https://brainly.com/question/6504879

Please help if you can!

Answers

Answer:

a

Explanation:

bc i said so its right lol

what prevents the planets in our solar system from floating away?
A. Earth's gravitational pull
B. planets gravitational pull on one another
C. moon's gravitational pull
D. suns gravitational pull​

Answers

The suns gravity keeps planets in their orbits. There is no other force in space to pull them out of their orbits therefore they stay.

Suns' gravitational pull​ prevents the planets in our solar system from floating away, therefore the correct answer is option D.

What is a solar system?

It is a structure in which the sun's attractive force causes all the planetary systems and celestial bodies to revolve around this.

The Sun is believed to be located in the system's center in the sun-centered concept upon which our Solar System is founded.

The primary factor that causes the planets in the solar system to revolve around the sun is gravity.

                                         

The sun's pull of gravity prohibits the planets in our planetary system from moving away, hence option D is the appropriate

To learn more about Solar systems, refer to the link given below;

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#SPJ2

Two boxes are 8 cm apart. Which of the following should Janet do to decrease the gravitational force between the boxes?

Answers

Answer:

the answer is 2.

Explanation:

A young man heaves a 6.5 kg rock at a velocity of 6.9 m/s. What is the kinetic energy of the rock?

Answers

Answer:

Hope it will help you a lot.

In the fermentation of alcohol, sugars in the liquid are converted to alcohol and bubbles are formed on the surface of the liquids. Which gas forms the bubbles?

Answers

Answer:

I believe it is Carbon Dioxide because after yeast breaks down the glucose (sugar) molecule, it forms/creates CO2 and Ethanol. (though it might be Ethanol that creates the bubbles) I am not quite sure if this is correct, but I hope it helps! :,)

Which statement regarding characteristics of electromagnetic radiation is correct?


Longer wavelengths of light have higher energies.

Lower frequencies of light have higher energies.

Higher frequencies of light have shorter wavelengths.

Shorter wavelengths of light have lower energies.

Answers

Answer:

Higher frequencies of light have shorter wavelengths.

A coin of mass 0.0050 kg is placed on a horizontal disk at a distance of 0.14 m from the center, as shown above. The coin doesn’t slip and the time it takes for the coin to make a complete revolution is 1.5 s.
A)The figure below shows the disk and coin as viewed from above. Draw and label vectors on the figure below to show instantaneous acceleration and linear velocity vectors for the pin when it is at the position shown below.
B)Determine the linear speed of the coin
C)The rate of rotation of the disk is gradually increased. The coefficient of stats if friction between the coin and the disk is 0.50. Determine the linear speed of the coin when it just begins to slip.
D)If the experiment in part c were repeated with a second, identical coin glued to the top of the first coin, how would this affect the answer to part c? Explain.

Answers

A) Figure attached below

B) The linear speed of the coin = 0.59 m/s

C) Linear speed as coin begins to slip = 0.83 m/s

D) The tangential speed will remain the same as seen in part C

Given data :

mass of coin = 0.0050 kg

Distance of coin from the center of disk = 0.14 m

Time to make a complete revolution = 1.5 s

A) Diagram showing the vectors on the figure is attached below

B) Determine the Linear speed of the coin

Linear speed of coin = 2 * π * ( 0.14 ) / 1.5

                                   = 0.59 m/s

C) Determine the linear speed of the coin when it just begins to slip

given that: friction between coin and disk = 0.50

Friction becomes maximum when coin begins to slip

Maximum frictional force (Fmax) =  uV

where V = mg

∴ Fmax = u*mg ---- ( 1 )centripetal force = [tex]\frac{mv^{2} }{r}[/tex] ---- ( 2 )

Equating equations ( 1 ) and ( 2 ) to determine the linear speed ( v )

v² = u*r*g

∴ v = √(u*r*g ) = √( 0.5 * 0.14 * 9.8 )

                        = 0.83 m/s

 

D) If the experiment is repeated with a second coin glued to the top of the first coin the tangential speed will remain the same

Hence we can conclude that The linear speed of the coin = 0.59 m/s Linear speed as coin begins to slip = 0.83 m/s , The tangential speed will remain the same as seen in part C

Learn more about Linear speed : https://brainly.com/question/24713716

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The number of wavelengths that pass a fixed point on a wave is called ______? How does oceanic current affect weather? The rectangle and the trapezoid have the same area. What is the length l of the rectangle?Please show work The car arrives from city A to city B in 3 hours. How many hours will it take to go the same way if you increase the speed by 20%? what was the impact of the depression on Moses Austin's fortune Identify the pattern rule for this sequence: 2, 8, 7, 13, 12, 18, 17 please answer asap 100 POINTS and BRAINLIEST to best answer Cushman Company had $842,000 in sales, sales discounts of $12,630, sales returns and allowances of $18,945, cost of goods sold of $399,950, and $289,650 in operating expenses. Gross profit equals: help plz I don't understand the last 2 questions Use the original price and the markdown to find the retail price.Original price: $80; Markdown: 16% A muscle contracts in response to an electrical signal that signals the ______________, the unit of contraction, to shorten. According to Olaudah Equiano, what role did Africans play in the slave trade ? 1) Find the area of the shaded regionif the big diameter is 12 in, and thesmall diameter is 8 in. When in reverse steering right the vehicle will go Learning Task 2: Describe the feelings or emotions expressed by each illustration below.....answer pls Give the imparfait of the verb indicated in parentheses.Be careful with accent marks! If the word requires accent marks and you do not include them, your answer will not count.lorsqu'elle a vu le Prince ric pour la premire fois. (nager)7. Arielle et ric (Answer)souvent ensemble. (danser)8. Belle (Answer) l'amiti de la Bte quand Gaston est arriv. (rflchir)9. Miss Samovar (Answer)le repas quand la Bte a demand du ketchup. (servir)10. Maestro Forte, est-ce que tu (Answer)du piano quand l'Armoire t'a appel? (jouer)11. Cendrillon (Answer)sa pantoufle de verre durant les douze coups de minuit. (chercher)12. Les belles-soeurs de Cendrillon (Answer)du shopping pendant que Cendrillon faisait le mnage. (faire) Breakfast eaten and the slim camp-outfit lashed to the sled, the men turned their backs on the cheery fire and launched out into the darkness. At once began to rise the cries that were fiercely sadcries that called through the darkness and cold to one another and answered back. Conversation ceased. Daylight came at nine o'clock. At midday the sky to the south warmed to rose-colour, and marked where the bulge of the earth intervened between the meridian sun and the northern world. But the rose-colour swiftly faded. The grey light of day that remained lasted until three o'clock, when it, too, faded, and the pall of the Arctic night descended upon the lone and silent land.As darkness came on, the hunting-cries to right and left and rear drew closerso close that more than once they sent surges of fear through the toiling dogs, throwing them into short-lived panics.At the conclusion of one such panic, when he and Henry had got the dogs back in the traces, Bill said:"I wisht they'd strike game somewheres, an' go away an' leave us alone.""They do get on the nerves horrible," Henry sympathized.They spoke no more until camp was made.The introductory paragraph to this section of text starts with breakfast and ends with the setting of Arctic sun. How does this short paragraph add to the conflict in the story? (5 points)It suggests time is running out before the story even begins.It suggests the cold will only increase in the coming days.It suggests the days are intense but beautiful.It suggests the characters do not get far during the short days. I AM GIVING 100 POINTS!!! What forms of the following equation in? 2x+3y=15 Help help help math math if a granola bar has 5.7 grams of protein in it how many centigrams of protein does it contain?A. 57 B. 0.57 C. 570 D. 5,700