1. Assume all the atoms in the universe are hydrogen. (In actual practice, over 75% of the atoms in the universe are hydrogen.) 2. Assume the sun is a typical star (made of pure hydrogen) has a density of 1.4 g/cm3 and is a sphere with a radius of 7.0*108m 3. Assume that there are 100 billion stars in our Milky Way galaxy that are identical to our sun. 4. Assume that there are 10 billion galaxies in the universe identical to our Milky Way galaxy.

Q: 2. We normally use kilometer (SI unit) for distances rather than miles (English unit). If 1.0 mi is…

A: 1 mi = 1.609 km Population density = 119,600 per 1 sq mi We have to perform unit conversion.  per 1…

Q: A bat flying at 5.00 m/s is chasing an insect flying in the same direction. The bat emits a 40.0 kHz…

A:

Q: I. MULTIPLE CHOICE. Read the following items carefully. Write the letter of the BEST answer on the…

A: Hello. Since your question has multiple sub-parts, we will solve first three sub-parts for you. If…

Q: How many 4-digit even numbers can be made from the digits 0; 2; 3; 7; 8; 9 if the number has…

A: The numbers can be formed from the given different digits differently. These digits are formed by…

Q: Given that the Diameter of Earth is about 7200 miles how many Earths would fit across the sun ?

A:

Q: What is the number of miles in a light-year, using (see picture) mi/s as the speed of light? I know…

A: The speed of the light in mi/s, c=1.86×105 mi/s   The time interval, t=1 year

Q: 8. Expres in decimal notation: a. 2.60x10-4 b. 207.8x10³ ⁹. Calculate approximately (use one…

A: Q.no 8 Part A 2.60×10^-4 = 0.00026 Part b 207.8×10^3 = 207800

Q: (a) Use powers of G and c to convert 1 M. to a unit of time and give its value in SI units. (b)…

A: Required to convert units

Q: Using a single dimensional equation, estimate the number of steps it would take a person with a step…

A: Given data: -  The step length of a person is l = 2.65 ft. The distance of Alpha Centauri from the…

Q: Which of the following statements are true of the null and alternative hypotheses? A.It is possible…

A: The null hypothesis: It is a statement of no difference between sample means or proportions. In…

Q: How many correct experiments do we need to disprove a theory? How many do we need to prove a theory?…

A: 1) There is only one single correct experiment necessary to disprove a theory, one experiment that…

Q: Calculate the angle a person needs to lean from the vertical when 1. walking a 14 m (radius)…

A: Radius of circular track is Distance is Time is Note:Gravitational acceleration is Find:(1) The…

Q: 7. Standard density of water in English unit is 1000, 8. The standard unit of pressure in SI is kN…

A:

Q: Given: The intial position of the ball is 3.4 cm. The final position of the ball is -4.2 cm. The…

A: Displacement is the shortest path length between initial position and final position  Average…

Q: What is wrong with the following problems? Explain in full sentences! 0x54x10x4 9) 0.54 x 10 Should…

A: The proper format for scientific notation is A×10b where A is a number or decimal number such that 1…

Q: Your friend keeps track of his gas mileage and finds that on average his car uses 20.79488098 miles…

A: Given,

Q: A parsec is a unit of length equal to about 3.10X1013 km. How long will it take light, moving at…

A: Given,  Distance travel = 1 Parsec Speed of light = 3×108 m/s We need to calculate, Time taken =?

Q: Part B is wrong FA=(2mw(L−x)+mbL)g/2L is the formula but I'm unsure which numbers to plug in where.

A:

Q: Find the order of magnitude of the following physical quantities. Enter your answer in the form: 10x…

A: We need to find the order of magnitude of the given quanitities.

Q: True or false 1. The unit-factor method is used as a validity tool in deriving equations. 2. Kinetic…

A: We know that By using the method we can check if an equation is correct or not. Hence, we can say…

Q: given that 4.82803 kilometers is approximately equal to 3 miles a) express the kilometer to mile…

A:

Q: 1. Dissect the problem by explaining the illustration 2. Identify the given variables and the…

A:

Q: Write 0.000083212 in scientific notation using 4 significant figures. Write 985210000 in scientific…

A: 8)  0.000083212 = 8.321 x 10-5   9)   985210000 = 9.85 x 108   10)  5.2298 ±0.5 = 5 ±0.5 , because…

Q: 1. 125 mm 125 mm 200 mm 200 mm 150 mm 60 mm

A:

Q: PLEASE HELP ASAP. PHYSICS ALGEBRA With exact decimals!

A:

Q: 2. In your own words, provide two advantages of using meters as a measurement of length rather than…

A: The two advantage of using meters as a measurement to measure the length instead of using old…

Q: 5. A brown stinky liquid has density = 3.119g/mL. Calculate the volume of 98mL of this liquid.

A: Hello. Since you have posted multiple questions and not specified which question needs to be solved,…

Q: Write the exponential form of the following: 5. 4670000000 6. 0.000893 7. 344500 8. 230000

A:

Q: The radius (R) of the Earth is 6371.22 km, how many significant figures are there? Select one: O a.…

A: Given : Radius of Earth (R) = 6371.22 km To determine : No. of significant figures

Q: are the twins still the exact same age? If not which one is the older and by how much

A: In this question we have to answer are the twins still the same age. Please give positive feedback…

Q: B. Significant Figures 1. Determine the number of Significant Figures of the following: 0.01002…

A: Significant figures: Significant figures are the numbers of digits in a value, often a measurement,…

Q: There's an apocalypse and you are sealed inside a rectangular room with dimensions (6.0 ± 0.1 m) x…

A: Volume of rectangular room is given by V = L×W×H Where L is length of the room, W is width of the…

Q: 3.9 x 10^-2, 3.9 x 10^-3, 9.3 x 10^-3 b) 3.9 x 10^-3, 3.9 x 10^-2, 9.3 x 10^-3 c) 3.9 x 10^-3, 9.3…

A:

Q: You have 1,000,000 number cubes, each measuring one inch on a side. 1. If you stacked the cubes on…

A: Given the number of cubes are 1, 000,000. Also, given the side of the cube is one inch. (1) Now when…

Q: 3. Write down the following numbers in scientific notation accurate to three significant figures:…

A: Scientific notation is a process by which numbers are represented in terms of decimal less than 10…

Q: Experiment 6: Transportation a) A typical car gets about 25 miles to the gallon in combined city and…

A: Since more than three subparts are asked in the question, a solution for the first one is provided…

Q: 4. How long is a microcentury in minutes? Note that 1 century is 100 years and 1 year is 365.25…

A: 1 century = 100 years 1 year = 365.25 days

Q: Density is the measure of the amount of mass in a given volume what is the density of my favorite…

A:

Q: If we know that dx2 =0, f(0) is 3x10^13/cc, f(+ ) =0, and L is 9.2 microns, then at what distance in…

A: Given that: δ2fδx2-1L2f=0f(0)=3×1013/ccf(+∞)=0L=9.2 micron =9.2×10-6 mTo determine the value of x at…

Q: For this problem, we want to estimate the answer, so our assumptions may be a little unrealistic.…

A: (a) In the given problem, no- of astronauts in space station= 4 the volume of air require per cycle…

Special Relativity

The theory of special relativity discusses how space and time are related to objects traveling along a straight line at a constant speed. Simply stated, as an object reaches the speed of light, its mass becomes infinite and it is unable to move faster than light. This interstellar speed limit has been the topic of much debate in astronomy, and also in science fiction when people consider how to fly over large distances.