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

Answers

Answer 1

Answer: $\log { x } -\log { 9 } =1\n \n \log { \left( \frac { x }{ 9 } \right) } =1\n \n \log _( 10 ){ \left( \frac { x }{ 9 } \right) } =1\n \n { 10 }^( 1 )=\frac { x }{ 9 } \n \n 9\cdot 10=x\n \n x=90$

This is because:

$\log _( a ){ \left( \frac { x }{ p } \right) } \n \n =\log _( a ){ \left( \frac { { a }^( m ) }{ { a }^( n ) } \right) } \n \n =\log _( a ){ \left( { a }^( \left( m-n \right) ) \right) } \n \n =\left( m-n \right) \cdot \log _( a ){ a } \n \n =m-n\n \n =\log _( a ){ x } -\log _( a ){ p } \n$

Answer 2

Answer:
   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

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The unit for measuring electric power is the A. volt.
B. ampere.
C. watt.
D. ohm.

Answers

Final answer:

The unit for measuring electric power is watt. This is the rate at which electrical energy is transferred. Other units like volts, amperes, and ohms are used to measure electrical potential difference, current, and resistance respectively.

Explanation:

The unit for measuring electric power is the watt (C). Electric power is the rate at which electrical energy is transferred by an electric circuit. Volts (A) are the units used to measure electrical potential difference, amperes (B) measure electrical current, and ohms (D) are used to measure electrical resistance. Therefore, if you are looking to measure electric power, your correct unit will be the watt. An example would be that a light bulb might use 60 watts of power.

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Final answer:

The unit for measuring electric power is the watts. It's calculated as one joule per second and, electrically, it's the product of voltage and current. Other units such as volt, ampere, and ohm measure electric potential difference, current, and resistance respectively.

Explanation:

The unit for measuring electric power is the watts. The watt is a unit of power that is defined as one joule per second. In terms of electrical power, it is calculated by multiplying the voltage (measured in volts) by the current (measured in amperes). Other units such as volt and ampere are related to electrical phenomena but they do not measure power. The volt measures electric potential difference or electric pressure whereas the ampere measures electric current. The ohm on the other hand is a measure of electrical resistance.

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Covalent bonds tend to make atoms more stable by helping them

Answers

by helping them achieve a full outer shell

Covalent bonds are where two atoms SHARE electrons, that way they can be stable :D

Water surface waves are _________.. a. longitudinal and perpendicular waves. b. vertical and horizontal waves. c. transverse and horizontal waves. d. longitudinal and transverse waves

Answers

Water surface waves are examples of waves that are both longitudinal and transverse waves. As the wave travels through the water, a clockwise circles is observed. Therefore, the answer to this item is letter D. All the rest of the choices do not describe the water surface waves.

Which describes the electric forces inside an atom?A. Gravitational forces are much stronger than electric forces.

B. Electric forces and gravitational forces are equal in this setting.

C. Electric forces are much stronger than gravitational forces.

Answers

Answer:The correct answer is option C.

Explanation:

Electrical forces are forces between the charge particles of different charges or of same charges.This type of force is termed as electrostatics forces.

Like charges repel each other and unlike charges attract.They are dipole forces and stronger than the gravitational forces which only attracts and are monopole forces.

Atom consist of protons and electrons with positive and negative charge respectively.The force between these subatomic particles are very stronger than the gravitational forces between these particles.This is due to very smaller masses of protons and electrons the gravitational force between them is very small.

the correct answer is C hope this helps a little

You kick a ball with a speed of 14 m/s at an angle of 51 degrees. How far away does the ball land?A. 21.3 m
B. 19.6 m
C. 1.8 m
D. 3.96 m

Answers

Answer: The ball will land at 19.6 m

Explanation:

To calculate the horizontal range of the ball, we use the formula:

$R=(v^2\sin 2\theta)/(g)$

where,

v = velocity of the ball = 14 m/s

$\theta$ = angle at which the ball is thrown = 51°

g = acceleration due to gravity = $9.8m/s^2$

Putting values in above equation, we get:

$R=((14)^2* \sin (2* 51))/(9.8)\n\nR=19.6m$

Hence, the ball will land at 19.6 m

d may be the correct answer because speed is very low so ball should cover less distance but angle is not very high so it can cover little much distance

Which describes the relationship between potential and kinetic energy of a ball thrown up in the air as it falls back to the ground? A.
Gravitational potential energy increases; kinetic energy increases.

B.
Kinetic energy equals gravitational potential energy.

C.
Kinetic energy increases; gravitational potential energy decreases.

D.
The mass of the ball is required to answer this.

Answers

The ball originally contains potential energy and no kinetic energy, therefore we can use the theory of conservation of mechanical energy. Its total energy, which is made up of the KE and PE, is constant and equal to its starting PE as it falls. Thus, option C is correct.

What potential and kinetic energy of a ball thrown up?

As the ball falls toward the ground, its gravitational potential energy is transformed into kinetic energy. The kinetic energy of the ball will increase as it accelerates until it collides with something. The ball's collision generates kinetic energy, which is transformed into several forms of energy.

As it rises, the ball's speed slows until the very apex of its motion, where it briefly pauses. At the peak, it accelerates at -9.8 m/s2.

Therefore, A ball is thrown up into the air, yet although though it rises into the air, the direction, and velocity of the ball are actually downward.

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The answer is c, because ball is falling so its gravitationl potential energy decreases, but it kinetic energy increases. Energy is always conserved.

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