big bang

Question 1

What will be the most likely “end” of the universe

Answer 1

The Big freeze/heat death, all heat and therefor energy will be used up,

Question 2

Are the Universes occupants slowing down or speeding up

Answer 2

Everything in the universe is speeding away from each other and speeding up

Question 3

What is a main piece of evidence for the big bang? (A)

Answer 3

CMB or cosmic microwave backround

Question 4

What is a main piece of evidence of the big bang?(B)

Answer 4

the universe is expanding away from itself very quickly meaning something with practically incalculable energy for that to happen.

Question 5

How much of the universe is made up of dark matter

Answer 5

arund 95-98% of the known universe is made up of stuff we can not observe

Question 6

what is the cause of red shifting

Answer 6

as light flies through space which is expanding, that expanding actually stretches the light wavlengths out

Question 7

Who first observed/theorized about red shift?

Answer 7

Edwin Hubble in 1929

Question 8

red shift vs Blue shift?

Answer 8

red shift occures when something is moving away from you, blue shift the opposite happens when something is moving towards you

Question 9

what did the very first galaxies look like/what were they composed of

Answer 9

in the very beginning at the start of the universe there were no solid planets among the galaxies and stars

Question 10

what is CMB?

Answer 10

Cosmic Microwave Backround is a faint old light from the beginning of the universe that appears to encompass/ exist throughout the whole Universe

Question 11

distance and displacement

Answer 11

distance encompasses the amount of units traveled in total while displacement refers to the distance from the starting point

Question 12

speed vs velocity

Answer 12

speed is amount of distance covered in a certain amount of time, velocity is speed with direction

Question 13

how do you calculate average speed with distance and time

Answer 13

divide distance by time

Question 14

how do you calculate average velocity?

Answer 14

displacement divided by time

Question 15

finding displacement from position time graph

Answer 15

find the distance of a point on the graph, in this case the distance will equal the displacement

Question 16

finding displacement from velocity time graph

Answer 16

you can add together intervals of time on the graph and the velocity of those points of time

Question 17

distance-time graph vs velocity-time graph

Answer 17

distance and time only deals with how far something went in that time velocity refers to that and the direction in which it went, meaning-a dog sled went twenty miles in 25 minutes and a car drove 30 miles in 16 minutes northwest gaining 30 ft in elevation.

Question 18

displacement from position formula

Answer 18

delta X= Xi -Xf

Question 19

average velocity formula

Answer 19

V ave=delta X/T

Question 20

displacement from velocity and time formula

Answer 20

deltaX=VT

Question 21

instantaneous vs average velocity

Answer 21

average velocity is just the displacement from one point to another in a certain amount of time while instantaneous velocity is the velocity of a point

Question 22

calculate acceleration given initial velocity and time

Answer 22

you divide ms/2 by meters

Question 23

calculate displacement given acceleration and time

Answer 23

s(displacement)=U(initial velocity)T(time)+1/2 at^2

Question 24

calculate velocity given acceleration and time

Answer 24

V(final velocity)=u(initial velocity)+at

Question 25

change in velocity

Answer 25

deltaV=Vt-Vi

Question 26

acceleration from change in velocity and time

Answer 26

a=deltaV/T

Question 27

calculate free fall height

Answer 27

height=1/2 g t^2

Question 28

calculate free fall height from free fall time

Answer 28

h=1/2 9.8m/s^2 time of free fall squared

Question 29

when starting from rest

Answer 29

deltaX=1/2 at^2

Question 30

effects of air resistance on object on free fall

Answer 30

air resistance lessens the effects of gravity on an object in free fall, slowing the object down