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
viktelen [127]
2 years ago
14

What is the oxidation number of the element Se

Physics
1 answer:
maria [59]2 years ago
6 0

Answer:

The oxidation number of a monatomic (composed of one atom) ion is the same as the charge of the ion. For example, the oxidation numbers of K+, Se2−, and Au3+ are +1, -2, and +3, respectively. The oxidation number of oxygen in most compounds is −2.

Explanation:

You might be interested in
a projectile is fired in such away that its horizontal range is equal to three times its naximum height.what is the angle of pro
finlep [7]

Answer:

\theta=53.13^o

Explanation:

<u>2-D Projectile Motion</u>

In 2-D motion, there are two separate components of the acceleration, velocity and displacement. The horizontal component has zero acceleration, while the acceleration in the vertical direction is always the acceleration due to gravity. The basic formulas for this type of movement are

V_x=V_{ox}=V_ocos\theta

V_y=V_{oy}-gt=V_osin\theta-gt

x=V_{ox}t

\displaystyle y=y_o+V_{oy}t-\frac{gt^2}{2}

\displaystyle x_{max}=\frac{2V_{ox}V_{oy}}{g}

\displaystyle y_{max}=\frac{V_{oy}^2}{2g}

The projectile is fired in such a way that its horizontal range is equal to three times its maximum height. We need to find the angle \theta at which the object should be launched. The range is the maximum horizontal distance reached by the projectile, so we establish the base condition:

x_{max}=3y_{max}

\displaystyle \frac{2V_{ox}V_{oy}}{g}=3\frac{V_{oy}^2}{2g}

Using the formulas for V_{ox}, V_{oy}:

\displaystyle \frac{2V_{o}cos\theta V_{o}sin\theta}{g}=3\frac{V_{o}^2sin^2\theta}{2g}

Simplifying

4cos\theta sin\theta=3sin^2\theta

Dividing by sin\theta

4cos\theta=3sin\theta

Rearranging

tan\theta=\frac{4}{3}

\theta=arctan\frac{4}{3}

\theta=53.13^o

4 0
3 years ago
What is the main reason plants and animals have sex?
Klio2033 [76]
Evolution of sexual production
7 0
3 years ago
Read 2 more answers
Magnitude of the normal force exerted by en in the figure below. What is the
vekshin1

Answer:

B

Explanation:

Reason is that the suitcase is exerted downward and when it moves downward the equation is mgsin tita

6 0
2 years ago
If youre reading this goodluck in school homie &lt;3
bazaltina [42]
I needed this ! Thanks a lot
7 0
3 years ago
Read 2 more answers
A hummingbird can a flutter its wings 4800 times per minute what is the frequency of wing flutters per second
Scilla [17]

the answer i got is 80 i hope this helpss!!!!

7 0
3 years ago
Read 2 more answers
Other questions:
  • Is gravity considered a constant or field force?explain
    8·1 answer
  • If a forces of 40 newtons moves a cart a distance of 9 meters, the work done is?
    5·1 answer
  • Which is the best example of translational motion?
    9·2 answers
  • What is the momentum of a man of mass 10kg when he walks with a uniform velocity of 2m/s.
    12·1 answer
  • A water gun fires 5 squirts per second. The speed of the squirts is 15 m/s.
    10·1 answer
  • 1. Select all that apply.
    8·2 answers
  • Most people can hear sound of pitch raning from to hertz​
    12·1 answer
  • Two generators use the same magnetic field and operate at the same frequency. Each has a single-turn circular coil. One generato
    13·1 answer
  • The Pangaea theory supports the theory of plate tectonics because _____.
    12·2 answers
  • What is the kinetic energy of a 10kg object that is moving with a speed of 60m/s.
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!