The most mass of our Milky Way is contained in an inner region close to the core with radius Ro. Because the mass outside this inner region is almost constant, the density distribution can be written as following (assume a flat Milky Way with height z0): S Po, r< Ro 0, r> Ro p(r) = (a) Derive an expression for the mass M(r) enclosed within the radius r. (b) Derive the expected rotational velocity of the Milky Way v(r) at a radius r. (c) Astronomical observations indicate that the rotational velocity follows a different behaviour: Voba (r) = VGTP020 Ro 5/2 1+e-dr/R 4

Q: This second answer is still incorrect.  Would there be another way to figure this out?   Thanks

A: Given data: Image distance (near point), v=-55 cm=-0.55 m Object distance, u=25 cm=0.25 m From part…

Q: 2. The density of cars (in cars per mile) down a 20 mile stretch of the Pennsylvania Turnpike is…

A: Given density of cars (in miles)  And length L=20miles Let's take a small element of length dx at…

Q: The mass of an object is 5.68 x 10-28 kg. What is the mass in milligrams? Report your answer in…

A: Mass of the object is m =5.68×10-28kg

Q: Write each of the following numbers to 3 significant figures in non-exponential notation. (Do not…

A:

Q: Perform the calculation and record the answer with the correct number of significant figures (34.123…

A: We need to calculate the answer the to correct significant figure.

Q: Please help with parts A and B of this question. Thank you so much!

A: Given: Mass of the honeybee = 9 x 10-2 g Charge acquired by the honeybee = 24 x 10-12 C Earth's…

Q: Starting from an airport, an airplane flies 190 miles north and then 210 miles east. How far, in…

A: Given data:  A airplane flies 190 miles , towards North Then 210 miles, towards East Required: The…

Q: A microwave oven has a power requirement of 1,251 W. A frozen dinner requires 6.8 min to heat on…

A: (a) Energy used in kWh

Q: Suppose an arrow is shot upward on the moon with a velocity of 54 m/s, then its height in meters…

A: Since you have posted a question with multiple sub parts, we willprovide the solution only to the…

Q: May I request the handwritten copy of this? I dont get how it was calculated.

A:

Q: A ship travels 15 miles in 112 minutes. What is its speed in mph? (Answer to the nearest whole…

A: Given Distance traveled by ship = 15 miles Time taken = 112 minutes =11260  =1.87 h We know that…

Q: I still do not understand. Could you please show by explicitly using the formulas? Thank you.

A:

Q: The figure below shows box plots for the annual premium for urban customers in three states. Note:…

A: Box plots for Insurance and premium is given for 3 states . To find = which state has lowest premium…

Q: You are standing a distance x from a building with height y. If the straight line distance between…

A:

Q: are the answers B,A,B?

A: The answers are following. 1-This function has no nodes =&gt; R21 2-The  function has near nodes at…

Q: An object is moving at a speed of 850 miles per hour. Express this speed in meters per minute. Round…

A: This problem is based on unit conversion. The given speed of the object is given in the unit of…

Q: hi, thank you for solving this for me. could you write out the last few lines of the answer…

A:

Q: thats not the answer! can someone solve it?

A:

Q: ok i understand much better now but where did the 0.258 come from (multiplied to 17)

A: Moment of force

Q: 4. Rose stands in front of a mirror and she looks at Jack through it. The perpendicular distances of…

A:

Q: (a) Determine the Cartesian coordinates of these points. (2.60 m, 40.0°) X= y= (4.10 m, 110.0°) y=…

A: Given value--- Two points in a plane have polar coordinates (2.6m, 40 deg) and (4.1m, 110 deg). We…

Q: can you give a conclusion about your final answer or give a description about your solution

A: The amount of energy that is stored in a capacitor's electric field is measured by its capacitance.…

Q: How do you go about part (a) and (b)?

A:

Q: A car travels at a speed of 60 miles per hour in a northward direction for 5 minutes. It then…

A:

Q: So in this instance am I doing it correctly or do I need to use the other formula instead?

A: Area of a circle = πr2 Surface area of a sphere = 4πr2 where, r = radius   And If we take the…

Q: 2.5 N +| a In the circuit shown, Determine the following: 4.5 V| 6.2 V+ A. Magnitude and direction…

A:

Q: can you clear the answer in number 3 ?

A:

Q: Thanks and what about 2.7 and 2.8? you guys have a limit of three questions you only answered one

A: 2.7  The map measurement between Pretoria and Polokwane is 6.1 cm  1 cm on bar scale  = 20 km in…

Q: Loop 2 Loop 1 -R1 R2 R3 (A DI4 (A2 V 1

A: The current in the direction of the loop is taken positive and that opposite to it is taken as…

Q: Compute the area of the region bounded by these parabolas. y = x2 – 4x + 3 and y = -x² + 2x + 3

A: Given: y=x2 -4x+3 y=-x2+2x+3

Q: 2 4 3 3 4 1 4 -3 5 1 −1 1 −2 3 2

A:

Q: Can you address part e here

A: Given, velocity is given by  v=2bt+3ct^2 ,where b=2.00 m/s^2 and c=0.100 m/s^3 using kinematics…

Q: Can someone please help me on parts 4 and 5?

A:

Q: how it become 0.829? if i multiply the numbers it will give me 5096?

A:

Q: When an object with an electric charge of −0.070mC is 2.0m from an object with an electric charge of…

A:

Q: In the process of using the scientific method, a researcher: Directly tests both the null and…

A: In scientific method, null hypothesis tests the relation ships between the collected data or which…

Q: - 40. A 2.00-kilogram mass is at rest on a horizontal surface. The force exerted by the surface on…

A: Part (40): Given: The mass of the object is 2 kg.

Q: Can you please answer parts a and b as well

A:

Q: ALARA terms (As Low As-17 .reasonable Achievable) True False

A: ALARA is the safety principle to minimize radiation exposure.

Q: Where did you get the first part of b) from? Before multiplying it by e- landaBt

A: Given Data: The successive decay series are A B and C.And their decay constant are respectively λA,…

Q: What is the height in meters of a 5 foot 6.0 inch tall person? m

A: given that,h=5 foot 6 inchconvert h in meters

Q: Where did you get 1.788 from?

A: