1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Masteriza [31]
3 years ago
11

A star is located at a distance of about 100 million light years from Earth. An astronomer plans to measure the distance of the

star by the parallax method. Which of these statements best explains why the astronomer's method of measuring the star distance is inappropriate?
a. At large distances, a red shift in the star's spectrum causes incorrect measurements.
b. At large distances, a blue shift in the star's spectrum causes incorrect measurements.
c. The parallaxes beyond a few thousand light years are too large to be used to measure distances.
d. The parallaxes beyond a few thousand light years are too small to be measured with common instruments.
Physics
1 answer:
nlexa [21]3 years ago
5 0
<span>d. The parallaxes beyond a few thousand light years are
too small to be measured with common instruments.

I'm not sure that parallax can even be used out to a few
thousand light years.

The NEAREST star to Earth has the BIGGEST parallax.
The star is Alpha Centauri.  It's only 4 light years away
from us, and its parallax is  0.000206 of a degree !
I have no idea how astronomers can measure angles
so small ... and that's the BIGGEST parallax angle of
ANY star.</span>
You might be interested in
Two blocks are connected as shown in the diagram below. Assume that the ramp is frictionless. Draw the force diagram for the blo
cluponka [151]

Answer:

diagram: see image, x-component: 84.3 N, acceleration: 4.38 m/s^2

Explanation:

(see image for further explanation)

5 0
3 years ago
4) A racing car undergoing constant acceleration covers 140 m in 3.6 s. (a) If it’s moving at 53 m/s at the end of this interval
Scorpion4ik [409]

Answer

given,

distance = 140 m

time, t = 3.6 s

moving speed = 53 m/s

a) distance = (average velocity) x time

    D = \dfrac{v_0 + v_1}{2}\times t

    140 = \dfrac{v_0 + 53}{2}\times 3.6

       v₀ + 53 = 77.78

        v₀ = 24.78 m/s or 25 m/s

b) a = \dfrac{v-u}{t}

   a = \dfrac{53-25}{3.6}

         a = 7.8 m/s²

using equation of motion

  v₀² = v₁² + 2 a s

  53² = 0²+ 2 x 7.8 x s

  s = 180 m

3 0
3 years ago
Compare and contrast formation of with the formation of mgcl2
zalisa [80]

Answer: Both of the compounds contain primary bonding; however, the bonding is of different types. Magnesium chloride (MgCl₂) contains ionic bonds, which are stronger and involve the complete transfer of electrons. Meanwhile, ethane (C₂H₆) also bonds by electron transfer but the electrons are not completely transferred from one atom to another. Instead, they are shared, forming what is known as a covalent bond.  

3 0
3 years ago
13. Describe the molecules of a solid in terms of kinetic energy.
Y_Kistochka [10]
The kinetic molecular theory of matter states that: ... Molecules in the solid phase have the least amount of energy, while gas particles have the greatest amount of energy. The temperature of a substance is a measure of the average kinetic energy of the particles.
3 0
2 years ago
The average mass of a rhinoceros calf is 45 kg. What is its weight in newtons? Round your answer to the nearest whole number. 5
Thepotemich [5.8K]

Answer:

441 [N].

Explanation:

Weight=mass*g, where mass=45; g=9,8.

Weight=45*9.8=441 [N].

3 0
2 years ago
Read 2 more answers
Other questions:
  • PLEASE HELP ASAP! ! ! ! ! ! ! !
    5·2 answers
  • Which of the following is a part of a wave?
    15·1 answer
  • What are some specific organisms that help speed up the decay of biomes?<br> Give me 2 answer
    7·1 answer
  • An overhead projector lens is
    13·1 answer
  • 04-9 (ML 6.12) A pristine stream flowing at 100 cubic feet per second (cfs) in the Rocky Mountains contains 5 mg/L of suspended
    5·1 answer
  • Write down the factors on which moment depends upon ?​
    12·1 answer
  • Plz answer this now anyone plz
    6·1 answer
  • Would the following reaction be endothermic or exothermic? Why?
    15·1 answer
  • A 1700 kg car is moving with a velocity of 20 m/s and stops.
    11·1 answer
  • What type of energy is stored in a pendulum at the top of its arc?
    7·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!