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
777dan777 [17]
3 years ago
5

1) How many AU make up a light-year?

Physics
2 answers:
MrRissso [65]3 years ago
8 0

Answer:..

1.One light-year = 63,240 AU

2. It’s about 93 million miles (150 million km),or

one astronomical unit (AU) = 92,955,807 miles (149,597,871 km).

exis [7]3 years ago
3 0

Answer:

1) 63241 AU make a light year.

2) 1.495x10^{8}km, 92914853miles

The astronomical unit gives a simple way to compare distance between planets and the Sun, using the distance from the Sun to Earth as an started point.

Explanation:

1) How many AU make up a light-year?

A light year is the distance that light can travel in one year

The speed of light has a value of 3x10^{8}m/s

That can be express in units of kilometers and years:

3x10^{8}m/s \cdot \frac{1km}{1000m} -- 300000km/s \cdot \frac{31536000s}{1year} -- 9.4608x10^{12}Km/year

Therefore, the distance can be found by means of the equation for average velocity.

v = \frac{x}{t}

x = v \cdot t  (2)

Then, t will be equal to 1 year (t = 1 year)

x = (9.4608x10^{12}Km/year)(1year)

x = 9.4608x10^{12}Km

However, an astronomical unit is defined as the distance between the Earth and the Sun (1.495x10^{8]km).

Therefore, to know how many astronomical units make a light year:

\frac{9.4608^{12}km}{149597870km} = 63241

Hence, 63241 AU make a light year.

2) What is an astronomical unit (AU) in miles and kilometers? Why is it useful for understanding the distances to planets?

As in was already said, an astronomical unit has a value of 1.495x10^{8]km

Then, it can be express in units of miles:

1.495x10^{8}km \frac{1mile}{1609km} ⇒ 92914853miles

The astronomical unit gives a simple way to compare distance between planets and the Sun, using the distance from the Sun to Earth as an started point.

You might be interested in
A recent home energy bill indicates that a household used 475475 kWh (kilowatt‑hour) of electrical energy and 135135 therms for
faltersainse [42]

Answer:

Explanation:

Given that,.

A house hold power consumption is

475 KWh

Gas used is

135 thermal gas for month

Given that, 1 thermal = 29.3 KWh

Then,

135 thermal = 135 × 29.3 = 3955.5 KWh

So, total power used is

P = 475 + 3955.5

P =4430.5 KWh

Since 1 hr = 3600 seconds

So, the energy consumed for 1hr is

1KW = 1000W

P = energy / time

Energy = Power × time

E = 4430.5 KWhr × 1000W / KW × 3600s / hr

E = 1.595 × 10^10 J

So, using Albert Einstein relativity equation

E = mc²

m = E / c²

c is speed of light = 3 × 10^8 m/s

m = 1.595 × 10^10 / (3 × 10^8)²

m = 1.77 × 10^-7 kg

Then,

1 kg = 10^6 mg

m = 1.77 × 10^-7 kg × 10^6 mg / kg

m = 0.177mg

m ≈ 0.18 mg

5 0
3 years ago
A wire loop with 70 turns is formed into a square with sides of length ???? . The loop is in the presence of a 1.20 T uniform ma
Oksi-84 [34.3K]

Answer:

l= 3.002 cm

Explanation:

Given that

n= 70 turns

B= 1.2 T

θ= 15°

I= 1.5 A

τ = 0.0294 N⋅m

Lets take length of sides is l.

We know that

τ  = n I A B sin θ

Area of square ,A= l²

Now by putting the value

τ  = n I A B sin θ

0.0294  = 70 x  1.5 x  l² x  1.2 x  sin 15°

l² = 0.000901 m²

l² = 9.01 cm²

l= 3.002 cm

3 0
3 years ago
What kind of energy does each phase of the pendulum represent
adelina 88 [10]

Answer:

Kinetic

Explanation:

Potienal is building up power where kinetic means moving

3 0
3 years ago
Read 2 more answers
A mouse spots an owl flying 10.1 feet over a nearby bush. The mouse is 30 feet away from the bush, and it sees the owl at a cert
Anna11 [10]

Answer:

Explanation:

Given

fly is at height of h=10.1\ ft

mouse is at a distance of 30 ft from bush

if \theta  is the angle of elevation then

using trigonometric relation

\tan \theta =\frac{h}{x}

\tan \theta =\frac{10.1}{30}

\theta =tan^{-1}(\frac{10.1}{30})

\theta =18.57^{\circ}

           

6 0
3 years ago
How to measure the least count of a stopwatch
elena-s [515]
The reading will be 0.00. that is the least count<span> of </span>stopwatch<span>.</span>
8 0
3 years ago
Other questions:
  • Please answer this soon.<br> Thank u.
    12·1 answer
  • What object best represents a true scale model of the shape of earth?
    12·1 answer
  • The vector product of vectors A⃗ and B⃗ has magnitude 12.0 m2 and is in the +z-direction.Vector A⃗ has magnitude 4.0 m and is in
    12·1 answer
  • A bicycle pedal is pushed straight downwards by a foot with a 16 Newton force. The shaft of the pedal is 20 cm long. If the shaf
    6·1 answer
  • If the gap between C and the rigid wall at D is initially 0.15 mm, determine the magnitudes of the support reactions at A and D
    6·1 answer
  • An air-track glider attached to a spring oscillates between the 10.0 cm mark and the 61.0 cm mark on the track. The glider compl
    6·1 answer
  • Un cuerpo se lanza verticalmente hacia arriba con una velocidad de 13 m/s. ¿Cuánto tiempo tarda en alcanzar la altura máxima? a)
    15·1 answer
  • A 900 kg car moves around a 500 m radius curve at 25.0 m/s. What is the centripetal force on
    7·1 answer
  • A 45 kg merry go round worker stands on the rides platform 6.3 m from the center. If her speed as she goes around the circle is
    7·1 answer
  • 9. What is the volume of an object that has a mass of 15.0 grams and a density of 1.4 g/mL?
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!