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
m_a_m_a [10]
2 years ago
9

Astronomers use a special kind of instrument called a spectrometer to analyze stars. Spectrometers can determine what stars are

made of even if the stars are very far away. How is it possible for spectrometers to do this?
Physics
1 answer:
marshall27 [118]2 years ago
4 0
The approval of the stars
You might be interested in
Which of the following is not a symptom associated with hypertension
Romashka-Z-Leto [24]
Do you have any answer choices?

3 0
3 years ago
Find the resistance of a stereo: current is 7 A voltage is 49 V.
pochemuha

Answer:

R = 7 [amp]

Explanation:

To solve this problem we must use ohm's law which tells us that the voltage is equal to the product of the current by the resistance. In this way, we have the following equation.

V = I*R

where:

V = voltage = 49 [V] (units of volts)

I = current = 7 [amp] (amperes)

R = resistance [ohms]

Now clearing R.

R =V/I

R = 49/7

R = 7 [amp]

5 0
3 years ago
A ball is thrown into the air by a baby alien on a planet in the system of Alpha Centauri with a velocity of 27 ft/s. Its height
Ahat [919]

Answer:

V_{3.01}=-93.2m/s

V_{3.005}=-93.1m/s

V_{3.002}=-93.04m/s

V_{3.001}=-93.02m/s

V_{3}=-93m/s

Explanation:

To calculate average velocity we need the position for both instants t0 and t1.

Now we will proceed to calculate all the positions we need:

Y_{3}=-99m/s

Y_{3.01}=-99.932m/s

Y_{3.005}=-99.4655m/s

Y_{3.002}=-99.18608m/s

Y_{3.001}=-99.09302m/s

Replacing these values into the formula for average velocity:

V_{3-3.01}=\frac{Y_{3.01}-Y_{3}}{3.01-3}=-93.2m/s

V_{3-3.005}=\frac{Y_{3.005}-Y_{3}}{3.005-3}=-93.1m/s

V_{3-3.002}=\frac{Y_{3.002}-Y_{3}}{3.005-3}=-93.04m/s

V_{3-3.001}=\frac{Y_{3.001}-Y_{3}}{3.001-3}=-93.02m/s

To know the actual velocity, we derive the position and we get:

V=27-40t = -93m/s

5 0
3 years ago
A force of 20 N acts over an area of 2 m2. What is the pressure? ​
ycow [4]

\text{Given that,}\\\\\text{Force, F = 20 N.}  ~ \\\\ \text{Area , A = 2 m}^2 . \\\\ \text{Pressure, P =? }\\\\P = \dfrac FA = \dfrac{20}2 = 10~~ \text{Nm}^{-2}

5 0
2 years ago
Read 2 more answers
What’s the difference between expressed/implied powers, concurrent powers, and reserved powers?.
Lisa [10]

Answer:

A reserved power is a power specifically reserved to the states. Powers include setting up local governments and determining the speed limit. A concurrent power is a power that is given to both the states and the federal government.

Explanation:

3 0
2 years ago
Other questions:
  • Covalent compounds are usually described as
    10·1 answer
  • Choose the true statement concerning the mall or subatomic particles:
    14·2 answers
  • What is the value of x in the expression: x = p(p+q) + 4 if p = -2 and q = 7
    7·1 answer
  • How many times heavier is a neutron than an electron?
    13·1 answer
  • Which term is a scalar quantity?
    14·2 answers
  • What is a magnetometer and how does it work?
    8·1 answer
  • How do people grow what makes them grow
    9·2 answers
  • The precision of a laboratory instrument is ± 0.05 g. The accepted value for your measurement is 7.92 g. Which measurements are
    15·2 answers
  • A car speeds up from 14 meters per second to 21 meters per second in 6 seconds. Whats the acceleration and the distance passed w
    14·1 answer
  • What is the mass of an object that has a weight of 2867 N?
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!