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lara31 [8.8K]
3 years ago
9

Use hubble's law to determine the distance to a galaxy which is moving away at a velocity of 3,500 km/s. (assume that h = 70 km/

s/mpc)
Physics
1 answer:
lorasvet [3.4K]3 years ago
5 0
The solution for this problem:
The distance in mega parsec is equal to recession velocity / H, where h is equal to 50 mega parsec.The explanation for this is:1 parsec = 2.E+05 AU, nearly. 50 mega parsec = 1. E+13 AU, nearly. 1 mega means E+06 (million).
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The heliocentric theory was first proposed by the astronomer
Setler [38]
Nicholas Copernicus, Greek astronomer, was the one who famously proposed the heliocentric theory -- the theory by which the sun was in the center of the solar system and the planets orbited it circularly.

Hope I helped and good luck!
5 0
4 years ago
Which equations can be used to solve for acceleration? Select four options.
tatiyna

Explanation:

Acceleration of an object is calculated by finding the change in its velocity divided by time taken.

If v_i is initial velocity, v_f is final velocity and t is time taken. Then the acceleration of the object is given by :

a=\dfrac{v_f-v_i}{t}\\\\at=v_f-v_i\\\\v_f=v_i+at .....(1)

So, the above equation is used to find acceleration. It is called the first equation of motion. After rearranging equation (1), the correct options are :

t=\dfrac{\Delta v}{a}

v_i=v_f-at

v_f=v_i+at

a=\dfrac{\Delta v}{t}

7 0
3 years ago
Read 2 more answers
Physical Science AIS - AE 20-21-Kotal / Unit 2: Reactions and Radioactivity / The Environment
astraxan [27]

Answer:19

Explanation:

6 0
3 years ago
An airplane traveling from Atlanta to New York travels 1,395 km in 2.5 h. What is the plane’s average speed?
Roman55 [17]
D. 558 km/h because if you divide 1,395 by 2.5 you’ll get the answer and I know this is correct because the keyword for me to divide is average.
3 0
3 years ago
A 20.0-kg traffic light hangs midway on a cable between two poles 30.0 meters apart. If the sag in the cable is 0.40 meters, wha
hammer [34]

Answer:

the tension in each side of the cable is 3677.57 N

Explanation:

given data

traffic light = 20 kg

cable between two poles = 30 m

sag in the cable = 0.40 m

solution

by the free body diagram

tan θ = \frac{0.4}{15}    .............1

θ = 1.527 °

and

tension = mg

The net force is along x - axis is express as

T2 cosθ = T1 cosθ     .................2

so T2 - T1     ..............3

and

when we take it along y  axis  that is express as

( T1 + T2) sinθ = mg    ...................4

so by equation 3 we put here

2 × T1 sin(1.527) = 20 × 9.8  

T1 = 3677.57 N

7 0
4 years ago
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