2. The nearest star to earth is the Proxima Centauri. It is approximately 4.2 lightyears away from our planet. a) Express this distance in km and in the astronomical unit. b) Calculate the time that it will take for this star's light to reach earth.

2. The nearest star to earth is the Proxima Centauri. It is approximately 4.2 lightyears away from our planet. a) Express this distance in km and in the astronomical unit. b) Calculate the time that it will take for this star's light to reach earth.

College Physics

11th Edition

ISBN:9781305952300

Author:Raymond A. Serway, Chris Vuille

Publisher:Raymond A. Serway, Chris Vuille

Chapter1: Units, Trigonometry. And Vectors

Section: Chapter Questions

Problem 1CQ: Estimate the order of magnitude of the length, in meters, of each of the following; (a) a mouse, (b)...

See similar textbooks

Related questions

Q: Gravitational lensing can be used to detect which component of the Universe? a. Dark Matter.…

A: Answer: (A) Dark Matter

Q: What is a light year? unit of time. unit of length 1 year on earth speed of light

A: A light year is the distance covered by the light beam in one year.

Q: Sea Rescue A helicopter makes a forced landing at sea. The last radio signal received at station C…

A: According to the sine rule of triangle asinA=bsinB=csinCA,B and C are the angles of the triangle.a,b…

Q: 1.Convert a density of 2.79 g/cm3 to kg/cm3

A: Since you have asked multiple questions, we will solve the first question for you. If you want any…

Q: The Schwarzschild radius of our sun is a. 3 km. b. 6 km. c. 9 km. d. 30 km.

A: (a) 3 km

Q: 10. Sirius is about 9.00 ly from Earth. To reach the star by spaceship in 15.0 y (ship time), how…

A: Given:- Sirius is about 9.0 ly from the earth To reach the star by spaceship in 15.0 y(ship time )…

Q: Which of the following pair is INCORRECT? I. Parsec - Distance II. Barrel - Liquid III. Light year -…

A: We know that 1 Parsec is equal to 3.26 light years and is used to measure distance. Thus Parsec -…

Q: What did Einstein call his greatest blunder? a. introducing a cosmological constant to his…

A: Einstein described "introducing a cosmological constant to his equations to balance gravity" as his…

Q: Why are we able to see the moon? * O reflects the sun's light O makes its own light Oglows in the…

A: We have to explain (a) why we are able to see the moon. (b) definition of the astronomical unit.

Q: Thin lenses. Object O tands on the central axis of a thin symmetric lens. For this situation, each…

A: object distance (p) = 47 cm Lens = converging Focal length (f)= 31 cm

Q: I) Do you believe that all the observers of the Earth see the same stars that you have observed from…

A: Collection of stars is a Constellation, three dimensionally that are distributed- the stars are all…

Q: 3. A light year is a unit that measures- A. Time B. Size C. Distance D. Temperature O A O B O c

Q: Use the fact that the speed of light in a vacuum is about 3.00 x 108 m/s to determine how many…

A: Speed, v = 3×108 m/sTime, t = 2.2 h = 2.2×60×60 s = 7,920 sDistance, s = ?

Q: Standing on the beach at sunset, you extend the tip of your finger at your full arm length from your…

Q: Compare the gravitational attraction between objects on earth and interaction of celestial bodies in…

A: Since you have posted multiple questions we will solve the first question for you. If you want any…

Q: 1- A star has a circumference of 62.8 million kilometers. Find its reduced circumference in meters.…

A: The circumference of the star = 62.8 million km 1 million = 1000000 1 km=1000 m Now we can write ,…

Q: Why do we say that light travels in straight lines? Is it strictly accurate to say that a laser beam…

A: According to the dual nature theory, the light rays possess the matter property thus mass. The mass…

Q: 5. How would you calculate the difference in brightness between a magnitude of -3 (Star A) and a…

A: A difference in brightness by unit magnitude represents a ratio of brightness 2.512. The difference…

Q: c.) real or virtual d.) inverted or noninverted e.) same or opposite

A: Answer want only c, d, e

Q: 34. What are the dimensions of mass (M), length (L) and time (T) if we take the velocity of light,…

A: Given, Speed of light = Universal gravitational constant = Planck's constant (h) =

Q: It says express your answer in astronomical units. Could you please give me the proper answer.

A: The astronomical unit (AU) is a unit of length, roughly the distance from Earth to the Sun and equal…

Q: How many light years are there in one metre? a) 9.46×1015ly b) 1.057×10-16ly c) 1ly d) 1×10-16ly

A: 1 light year = 9.46×1015m1m = 1/(9.46×1015)ly = 1.057×10-16ly.

Q: 6. Two double stars, one having one solar mass and the other three solar masses, rotate about their…

A: Given The mass of stars are M1=MoM2=3Mo Where Mo is the solar mass. Mo=1.989×1030kg the distance…

Q: 12. Convert 4.6 light years to the distance in kilometers (speed of light = 300,000 km/sec) 1 lb =…

Q: The age of the universe is related to Hubble's Constant by the expression: t = Ho Calculate a value…

A: The rate of cosmic expansion is measured by the Hubble constant. It is usually measured in terms of…

Q: The cosmic background radiation comes from a time in the evolution of the universe a. when…

A: Given The cosmic background radiation comes from a time in the evolution of the universe, as…

Q: 1- What is the minimum angular speed at which Michelson's eight-sided mirror would have had to…

A: Step 1:Given:The distance between the stationary mirror and the rotating mirror: d=35 kmThe number…

Q: A star "X" is 15 light years away from us. An alien on that star sends a light signal today on 22nd…

A: Solution: As given a star X is 15 light years away from us. An alien on that star sends a light…

Q: We observe an increase in brightness of a star that is 5.81×10¹⁹ m away. How long ago did the actual…

A: Distance of star = 5.81 × 1019 m Speed of light = 3 ×108 m/s

Q: 2. Gradient of the cyllindirical coordinates Drive gradient of the cyllindirical coordinates as we…

A: Derive gradient of the cylindrical coordinate.

Q: .The speed of light is 2.9979× 108m/s Convert this speed to miles per second. Express your answer…

A: Speed of light in m/s = 2.9979×108m/swe have to - Convert this speed to miles per second

Q: Three stars are moving away from the observer and their stellar spectra are shown below. 500 nm 600…

A: Given information: Spectrum of three Stars:

Q: Gravitational waves travel at the speed of light. Their speed, wavelength, and frequency are related…

A: frequency f=10 Hzspeed of light c=

Q: 3- Compare the size of: observable universe and the earth. Scale down the numbers you found to more…

A: To compare the size of the observable universe and the earth.

Q: If the speed of light is given as 299.792,458 meters per second and the wavelength is 481 nm. what…

A: Formula of frequency is as follows; f=vλ…

Q: What are the postulates for the Special Theory of Relativity?

A: What are the postulates for the Special Theory of Relativity?

Q: A newly discovered star, G78392B is 2.33x1015 km away from earth. How many light years away is star…

Q: 1. Which of the following theories is probabilistic? a. Newton's Law of Gravity. b.…

A: We will answer the question by first looking at the definition of the term 'probabilistic'. The…

Q: A meter stick is moving at 1% the speed of light. What is its contracted length?

Q: I don't understand the question. Please help. This is for my astronomy lab assignment.

A: Required :

Q: 1.Converting Angles a. Convert degrees to arcseconds: convert 45 degrees to arcseconds b. Convert…

Concept explainers

Speed of light

The speed at which the light travels in a vacuum is unbiased for both the source and inertial frame of reference of the observer. This was postulated by the physicist, Albert Einstein, by observing the theory of electromagnetism of Maxwell. Also, there was no evidence for the luminiferous aether, that is, the medium for the propagation of light where the electromagnetic field exists.

Question

100%

2. The nearest star to earth is the Proxima Centauri. It is approximately 4.2
lightyears away from our planet.
a) Express this distance in km and in the astronomical unit.
b) Calculate the time that it will take for this star's light to reach earth.
3. Find the weights of gelatin and butter contained in a cubic box with a side
dimension of 0.03 em. Gelatin has a density of 79 lb/ft³ while butter has
a density of 53 lb/f³.

Expert Solution

This question has been solved!

Explore an expertly crafted, step-by-step solution for a thorough understanding of key concepts.

This is a popular solution!

SEE SOLUTION Check out a sample Q&A here

Step 1 :Introduction

VIEW

Step 2 :Conversion of units

VIEW

Step 3 :Calculation of the time taken

VIEW

Trending now

This is a popular solution!

Step by step

Solved in 3 steps

SEE SOLUTION Check out a sample Q&A here

Knowledge Booster

Learn more about

Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, physics and related others by exploring similar questions and additional content below.

Similar questions

1. Which of the following theories is probabilistic? a. Newton's Law of Gravity. b. Kepler's Laws of Planetary Motion. c. Quantum Mechanics. d. General Relativity.
90. Which of the following is NOT a reason for the very earliest ancient development of Astronomy include: b. Testing early theories of physics. c. Developing a calendar. d. Religious and cultural ceremonies.
6 7 8 answers only
1. Why is mass more fundamental than weight? 2. What comes first to your mind when you read the word gravity?
1. Please help me answer A and B. Well explained please. (Not written on a paper please) A. Sets out the two postulates of Albert Einstein's theory of special relativity. B. What is simultaneity? Use a concrete example in your explanation.
2
#29
It is defined as the minimum speed an object must have to approach an infinite separation distance from a celestial body a.) Planetary motion b.) Escape speed c.) Equal areas d.) Orbital speed In the derivation of orbital speed we can infer that the orbital speed of an object is equal to its____ a.) Centripetal acceleration b.) Centripetal force c.) Tangential velocity d.) Tangential acceleration
Why is it difficult to study our own galaxy? O The sun obscures the view O We are within it and thus cannot see it from the outside O Earth's position is not ideal compared to other planets (within the galaxy) for viewing our galaxy O Parts of it are too far away to see
9)
Challenges to Space Exploration a) We can round numbers to say light (and all electromagnetic radiation: radio waves, infrared, ultraviolet, etc.) travels at approximately 3x108 m/s. At its closest approach, Mars is about 0.5 au of the Earth. At this distance, how long would it take for an astronaut on Mars to communicate with Mission Control on Earth? Give your answer in minutes. Explain why Mars rovers have entire sequences for travel pre-programmed and uploaded all at once rather than being driven around in real time with a joystick. For the Earth-Moon distance in 5b, you can use 384,400 km b) The boosters that launched Apollo 11 allowed the astronauts to reach a speed of 25,000 miles per hour. At that speed, about how long did it take for the astronauts to reach the Moon? At that speed, how long would it take to reach Mars, assuming the closest approach distance given above? Give your answers in days.
1. Suppose we had calculated the circumference C of the circle from our diameter d, using the formula C = Td. What would be the (absolute) uncertainty ac in the circumference, in terms of any of the following quantities: od,d, and C?