Which best describes projectile motion?

Constant vert. acceleration & constant horiz. velocity

When should you use the time dilation equation?

the events occur at the same location in a frame

Which is the correct equation for time dilation?

t'=\frac{t}{\sqrt{1-\left(\frac{v}{c}\right)^2}}

Satellites remain in orbit around the Earth because

they are constantly falling toward Earth in a curved path

Which of these statements are true?

The laws of Physics are the same everywhere in the Universe

If you are stationary on Earth and see a rocket flying past you at 0.9 c, what do you see?

The rocket looks shorter and events on it happen more slowly

Gravitational field strength is ...

the gravitational force acting on a unit mass

Some of the best evidence for the Big Bang includes ...

Redshift of light from space and CMB radiation

The redshift of a galaxy can be calculated by ...

Dividing the change of wavelength by the rest wavelength

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Higher Physics ODU 2

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Scottish Higher Our Dynamic Universe quiz

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Questions 30

Answers

1
Which star has the highest surface temperature?
Star A
They have the same surface temperature
There is not enough information to tell
Star D
2
Which best describes projectile motion?
Constant vert. acceleration & constant horiz. velocity
Constant horiz. velocity & constant vert. velocity
Constant horiz. acceleration & constant vert. acceleration
Constant vert. velocity & constant horiz. acceleration
3
The gravitational force exerted at distance r from a large mass M is proportional to ...
\frac{r^2}{M}
\frac{M}{r^2}
\frac{M}{r}
Mr^2
4
The Doppler Effect is the apparent change in frequency when there is relative motion between ...
Observer and Frequency
Frequency and Speed
Observer and Source
Source and Speed
5
Hubble's Law is given by:
z=\frac{λ_0-λ_r}{λ_r}
v=H_0d
t=\frac{1}{H_0}
z=\frac{v}{c}
6
When should you use the time dilation equation?
when your velocity is very close to c
the events do NOT occur at the same location in a frame
the events occur at the same location in a frame
when your velocity is small
7
Hubble's law relates the recessional velocity of a galaxy and ...
The size of the galaxy
The age of the galaxy
The distance to the galaxy
The speed of the galaxy
8
If Hubble's constant is 2.34 x 10^-18 s^-1, what is the age of the universe?
14 million years
14 trillion years
4.27 x 1017 s
4.27 x 1017 years
9
Which is the correct equation for time dilation?
t'=t\sqrt{1-\left(\frac{v}{c}\right)^2}
t'=\frac{t}{\sqrt{1-\left(\frac{v}{c}\right)^2}}
t=\frac{t'}{\sqrt{1-\left(\frac{v}{c}\right)^2}}
t=t'\sqrt{1-\left(\frac{v}{c}\right)^2}
10
Satellites remain in orbit around the Earth because
no forces act on them
they are constantly falling toward Earth in a curved path
the moon's gravitational pull on them is equal to the Earth's pull
their motors keep them moving in circles
11
A hotter star, compared to a cooler star, will have ...
A longer lifetime
A higher peak wavelength
A smaller mass
A shorter peak wavelength
12
What temperature is the Universe?
3 K
-273 K
-273 oC
0 K
13
Which of the following shows increasing prefixes (i.e. smaller to bigger)?
n, M, k, m
η, μ, m, M
k, G, M, T
μ, M, k, G
14
What is the evidence for Dark Matter?
Rotational velocities of stars
The expansion of the Universe is accelerating
CMB radiation
Peak wavelength of stars
15
Which of these statements are true?
The laws of Physics change when velocity > 3x107ms-1
The laws of Physics change depending on how fast you go
The laws of Physics are the same everywhere in the Universe
The laws of Physics change in across the Universe
16
At what speed do relativistic effects start being noticed?
0.1 c
1 c
0.01 c
c
17
If you are stationary on Earth and see a rocket flying past you at 0.9 c, what do you see?
The rocket looks shorter and events on it happen more quickly
The rocket looks longer and events on it happen more quickly
The rocket looks longer and events on it happen more slowly
The rocket looks shorter and events on it happen more slowly
18
If a galaxy is moving towards us we would ...
See a lower frequency light
See a higher frequency light
See a longer wavelength light
Hear a higher frequency sound
19
Calculate the redshift of light observed from space at 489.7 nm with rest wavelength of 471.2 nm
0.038
0.039nm
0.039
0.037
20
What electromagnetic wave should be in the background of the Universe if the Big Bang happened?
Microwave
Ultraviolet
Radio
Infrared
21
Gravitational field strength is ...
the same everywhere in the Universe
equal to the weight
the mass caused by gravity
the gravitational force acting on a unit mass
22
Some of the best evidence for the Big Bang includes ...
Dark energy & dark matter
Redshift of light from space and CMB radiation
Black holes & quasars
General & special relativity
23
The Law of Universal Gravitation states ...
all of these are correct
the size of the force depends on the mass of the objects.
all objects attract each other.
the force depends on the distance between the masses.
24
Which of the following is not an example of special relativity?
Mass increading as you approach the speed of light
Time dilation
Masses warping space time
Length contraction
25
The redshift of a galaxy can be calculated by ...
Dividing the observed wavelength by the rest wavelength
Dividing the change of wavelength by the rest wavelength
Dividing the speed of light by the speed of the galaxy
Dividing the rest wavelength by the observed wavelength
26
What increases as you move from right to left in this picture?
wavelength of light
speed of light
frequency of light
energy of star
27
A police car travels towards you at 20 ms^-1 emitting a 10 kHz tone, what frequency do you hear?
10000 Hz
15000 Hz
10625 Hz
9444 Hz
28
Which of the following supports the theory of the Expanding Universe?
The Big bang
Dark matter and energy
Redshift of Galaxies
Blueshift of Galaxies
29
During projectile motion, horizontal speed ...
goes up and then down
depends on the vertical speed
changes
remains constant
30
Which of these was proposed to explain why galaxies spin faster than we expect?
The Dark Side
Dark matter
Dark energy
Dark flow

Higher Physics ODU 2 Flashcards | StudBud