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
hram777 [196]
3 years ago
7

Help me on this question? log x-log 9=1

Physics
2 answers:
DanielleElmas [232]3 years ago
6 0
\log { x } -\log { 9 } =1\\ \\ \log { \left( \frac { x }{ 9 }  \right)  } =1\\ \\ \log _{ 10 }{ \left( \frac { x }{ 9 }  \right)  } =1\\ \\ { 10 }^{ 1 }=\frac { x }{ 9 } \\ \\ 9\cdot 10=x\\ \\ x=90

This is because:

\log _{ a }{ \left( \frac { x }{ p }  \right)  } \\ \\ =\log _{ a }{ \left( \frac { { a }^{ m } }{ { a }^{ n } }  \right)  } \\ \\ =\log _{ a }{ \left( { a }^{ \left( m-n \right)  } \right)  } \\ \\ =\left( m-n \right) \cdot \log _{ a }{ a } \\ \\ =m-n\\ \\ =\log _{ a }{ x } -\log _{ a }{ p } \\
Alika [10]3 years ago
4 0

   log(x) - log(9) = 1

Subtracting the logs of numbers gives you the log of
the quotient of the numbers.

     Log(x) - log(9)  is the log of  (x/9).

So the equation says:    log (x/9) = 1

Raise 10 to the power of each side:  10^(log of x/9) = 10^1

But  10^(log of x/9) is x/9, and 10^1 is 10.

So        x/9 = 10

             x  =  90

You might be interested in
Which of the following types of waves can transmit only through matter? Select all that apply.
Ivan

D) Gamma Rays

Explanation:

Gamma rays can transmit through matter.

3 0
2 years ago
Rank the six combinations of electric charges on the basis of the electric force acting on q1. Define forces pointing to the rig
g100num [7]

I have attached the image showing the 6 combination of charges

Answer:

Smallest are: q1 = +1 nc, q2 = +1 nc, q3 = +1 nc and q1 = -1 nc, q2 = -1 nc, q3 = -1nc

Third Largest: q1 = +1 nc, q2 = +1nc, q3 = -1 nc

Second Largest: q1 = +1 nc, q2 = -1 nc, q3 = +1 nc

Largest are: q1 = +1 nc, q2 = -1 nc, q3 = -1 nc and q1 = -1 nc, q2 = +1 nc, q3 = +1 nc

Explanation:

The electrostatic force between 2 charges is; F = k•q1•q2/r²

Where r is the distance between the 2 charges q1 and q2 and k is coulombs constant.

Thus;

F ∝ q1•q2/r²

The net force on the charge q1 is the sum of the forces on charge q2 and q3.

If the two charges are opposite, the force is an attractive force while if the two charges are similar, the force is a repulsive force.

Thus, if the combination has same type of charges, i.e;(+1,+1,+1) or (-1,-1,-1), the force will be very small.

So, now the order of forces from smallest to largest is;

Smallest are: q1 = +1 nc, q2 = +1 nc, q3 = +1 nc and q1 = -1 nc, q2 = -1 nc, q3 = -1nc

Third Largest: q1 = +1 nc, q2 = +1nc, q3 = -1 nc

Second Largest: q1 = +1 nc, q2 = -1 nc, q3 = +1 nc

Largest are: q1 = +1 nc, q2 = -1 nc, q3 = -1 nc and q1 = -1 nc, q2 = +1 nc, q3 = +1 nc

3 0
2 years ago
Explain three ways visual aids help you study
Katen [24]
Visual aids are tools that help to make an issue or lesson clearer or easier to understand and know (pictures, models, charts, maps, videos, slides, real objects etc.). ... Visual aids are those devices which are used in classrooms to encourage students learning process and make it easier and interesting.
7 0
2 years ago
Which best describes a difference between laser light and regular light?
Inga [223]
The basic difference is that the ordinary sources are incoherent that means that the discrete frequencies merge up to give an intermediate between the maximum and minimum frequencies. While the laser is coherent containing the single frequency with maximum amplitude. thus travelling far.
4 0
3 years ago
The North Star is located in the Big Dipper. True or False
harina [27]

Answer:

False

Explanation:

It is located in the little dipper whose stars are more faint.

4 0
3 years ago
Read 2 more answers
Other questions:
  • A vehicle traveling at a steady speed takes 4 hours to travel 244 km. calculate the average speed of this vehicle.
    8·1 answer
  • In two grams of element x combine with 4 grams of element y to form compound xy how many grams of element why would combined wit
    13·1 answer
  • If I drop a feather and a elephant from an equal height in a vacuum which will hit the ground first?
    14·2 answers
  • A brick is released with no initial speed from the roof of a building and strikes the ground in 1.80 s , encountering no appreci
    10·1 answer
  • vector A makes equal angles with x,y and z axis. value of its components (in terms of magnitude of vector A will be?
    6·2 answers
  • ____ and ____ both discovered electromagnetic induction. This is that electric current could be produced in a wire by moving a m
    10·1 answer
  • Kinetic friction is affected by the weight of the object. TrueFalse
    7·2 answers
  • Pls help i’ll give brainliest if you give a correct answer!!
    15·2 answers
  • A 75 kg refrigerator is located on the 70th floor of skyscraper (300 meters above ground). What is the potential energy of the r
    10·2 answers
  • 3. One effective method for coping with change is using:
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!