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
Elena L [17]
2 years ago
7

What does red shift tell about the movement of a galaxy?​

Physics
1 answer:
defon2 years ago
4 0
A redshift reveals how an object in space (star/planet/galaxy) is moving compared to us. It lets astronomers measure a distance for the most distant (and therefore oldest) objects in our universe
You might be interested in
Whats the term for climate near equator
storchak [24]
The closer to the equator, the hotter the climate will be.
6 0
3 years ago
Read 2 more answers
If an object's kinetic energy is zero, what is its momentum?
hammer [34]
If the object's kinetic energy is zero, then due to in multiplication factor, it's momentum will also be equal to zero 'cause the velocity of the object must be Nil

In short, Your Answer would be: "Zero"

Hope this helps!
6 0
3 years ago
A speed skater moving across frictionless ice at 9.2 m/s hits a 5.0 m wide patch of rough ice. She slows steadily, then continue
enot [183]

Answer:

a = -5.10 m/s^2

her acceleration on the rough ice is -5.10 m/s^2

Explanation:

The distance travelled on the rough ice is equal to the width of the rough ice.

distance d = 5.0 m

Initial speed u = 9.2 m/s

Final speed v = 5.8 m/s

The time taken to move through the rough ice can be calculated using the equation of motion;

d = 0.5(u+v)t

time t = 2d/(u+v)

Substituting the given values;

t = 2(5)/(9.2+5.8)

t = 2/3 = 0.66667 second

The acceleration is the change in velocity per unit time;

acceleration a = ∆v/t

a = (v-u)/t

Substituting the values;

a = (5.8-9.2)/0.66667

a = -5.099974500127

a = -5.10 m/s^2

her acceleration on the rough ice is -5.10 m/s^2

7 0
3 years ago
2. A brick is sitting on a building 22 m high. It has a mass of 7.9 kg. What amount of potential
Citrus2011 [14]

Answer:

1703.24J

Explanation:

Given parameters:

Mass of brick  = 7.9kg

Height of building  = 22m

Unknown:

Potential energy of the brick  = ?

Solution:

The potential energy of a body is the energy at rest of the body. Mathematically;

 

         P.E = mgh

m is the mass of the brick

g is the acceleration due to gravity

h is the height of the building

  Insert the given parameters and solve;

        P.E  = 7.9 x 9.8 x 22  = 1703.24J

6 0
3 years ago
A girl hits a baseball with a bat. When the bat strikes the ball, what is the
Illusion [34]

Answer:

Its simple! B The ball accelerates upward!♡♡

5 0
3 years ago
Read 2 more answers
Other questions:
  • Consider a high-speed bus colliding head-on with an innocent bug. The force of impact splatters the unfortunate bug over the win
    14·1 answer
  • Explain the versatility of epithelial tissue
    6·2 answers
  • If you are seeing a solar eclipse but you are not located in the umbra of the moon, what might you see in the sky?
    15·1 answer
  • When is thermal equilibrium achieved between two objects?
    11·2 answers
  • Where do trees really come from and this is my little sister asking it not me
    14·2 answers
  • Two drums of the same size and same height are taken.
    5·1 answer
  • a jogger does 3.45 E 6 J of work and gives off 1.67 E 6 J of heat. what is the change in her internal energy? show your work​
    9·1 answer
  • The centripetal force is inverse proportional to _____, which means that if _____
    12·1 answer
  • Why are there more fat, shaggy bison in Time 3 than in Time 1?
    9·1 answer
  • Is atom on the offficial repository of ubuntu ?
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!