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
Gwar [14]
3 years ago
6

Astronomers use the _______ of stars to determine how hot they are and their _______ to estimate how far away they are. A. brigh

tness; size B. temperature; position C. size; temperature D. color; brightness
Physics
1 answer:
ss7ja [257]3 years ago
6 0

Astronomers use the color of stars to determine how hot they are and their brightness to estimate how far away they are. <em>(D)</em>

You might be interested in
PLEASE HELP!!! GIVING BRAINLIEST!! ill also answer questions that you have posted if you answer these correctly!!!! (40pts)
Cerrena [4.2K]

Answer:

B false

Explanation:

dont have any explanation

8 0
2 years ago
Read 2 more answers
Consider this statement: Air is matter. Which facts best support the statement?
mihalych1998 [28]
The answers is A and C hope this helps :)
8 0
3 years ago
Read 2 more answers
A 15 g turntable is covered with a uniform layer of dry ice that has a mass of 9.0 g. The angular speed of the turntable and dry
pychu [463]

Answer:

1.2 rad/s

Explanation:

m1 = 15 g, m2 = 9 g, ω1 = 0.75 rad/s

Let the new angular speed is ω2 and the radius of the table be r.

The angular momentum is conserved when no external torque is applied.

I1 ω1 = I2 ω2

(m1 + m2)x r^2 x 0.75 = m1 x r^2 x ω2

(15 + 9) x 0.75 = 15 x ω2

ω2 = 1.2 rad/s

3 0
2 years ago
A vector has an x-component of length 10 and a y-component of length 3. What is the angle of the vector? (Hint: Use the inverse
Sonja [21]
The vector, the x-component and the y-component form a rectangle triangle where the vector is the hypothenuse and the x and y components are the two sides.
Calling \alpha the angle between the vector and the horizontal direction (x), the two sides are related to \alpha by
\tan \alpha  =  \frac{v_y}{v_x}
where vy and vx are the two components on the y- and x-axis. Using vx=10 and vy=3 we find
\tan \alpha  =  \frac{3}{10} =0.3
And so the angle is
\alpha = \arctan (0.3)=16.7^{\circ}
5 0
3 years ago
Determine the magnitude of the resultant force FR=F1+F2FR=F1+F2. Assume that F1F1F_1 = 235 lblb and F2F2F_2 = 350 lb
Svetlanka [38]

Answer:

<em>585lb</em>

Explanation:

Given the formula for calculating the magnitude of the resultant force as;

F_R = F_1 + F_2

<em>Given </em>

<em></em>F_1 = 235 lb \ and \ F_2 = 350 lb\\F_R = 235lb + 350lb\\F_R = 585lb\\<em></em>

<em>Hence the magnitude of the resultant force is 585lb</em>

4 0
2 years ago
Other questions:
  • When you stop at a railroad crossing at night, instead of correctly perceiving two red lights that flash alternately you may per
    5·2 answers
  • Which of the following is a mixture?<br><br> A.steel<br> B.water<br> C.oxygen<br> D.gold
    9·2 answers
  • Which property describes the ability of one substance to dissolve in another substance?
    14·1 answer
  • An object moving 20 m/s
    13·1 answer
  • PHYSICAL SCIENCE
    11·2 answers
  • The angular speed of an automobile engine is increased at a constant rate from 1200 rev/min to 3000 rev/min in12 s.(a) What is i
    10·1 answer
  • Four weather satellites are orbiting the Earth at a height of 825 kilometers. Some characteristics of the satellites are shown i
    15·1 answer
  • A material that breaks down quickly in the environment is called??
    6·2 answers
  • Write two functions of kotokis​
    8·1 answer
  • A body is dropped from the roof of a 20 m high building by how much:
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!