PHYSICS HIGH SCHOOL

What ion is most closely associated with bases?

Answers

Answer 1
Answer:

Answer: hydroxyl ion

Explanation:

When base is dissolved in water it dissociate and produce an hydroxyl ion
Answer 2
Answer: The ion most closely associated is hydroxide.

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Sum up in a few sentences what did Cavendish discover and how did he do it?

Answers

He was a British philosopher, and an important experimental and theoretical chemist. He is known for his discovery of hydrogen. He at that time called it "inflammable air".

Two of the three tuning forks have known frequencies. When a 510 Hz. fork and the unknown fork are struck together, four beats per second are heard. When a 505 Hz. fork is struck with the unknown fork, beats are produced that are too numerous to count accurately. What is the frequency of the unknown fork?

Answers

4 Hz is the difference between 510 and the unknown. 
Therefore the unknown is either 514 or 506. 

If 505 and 506 were struck together, the diff would be 1 Hz 
If 505 and 514 were struck toghether, the diff would be 9 Hz which would be difficult to count accurately, 

Therefore the unknown is 514

Answer:

514Hz

Explanation:

510 - unknown = 4Hz

unknown = 514 or 506

505 - unknown = numerous

unknown is most likely 514 because 1 beat that wouldve resulted from the 506 Hz isn't numerous.

Vector A has a magnitude of 63 units and points west, while vector B has the same magnitude and points due south. Find the magnitude and direction of a) A + B and b) A - B. Specify the directions relative due west.​

Answers

Given :

Vector A has a magnitude of 63 units and points west, while vector B has the same magnitude and points due south.

To Find :

The magnitude and direction of

a) A + B .

b) A - B.

Solution :

Let , direction in north is given by +j and east is given by +i .

So , A=-63i and B=63j

Now , A + B is given by :

A+B=-63i+63j

| A+B | = 63√(2)

Direction of A+B is 45° north of west .

Also , for A-B :

A-B=-63i-63j

|A-B|=63√(2)

Direction of A-B is 45° south of west .

( When two vector of same magnitude which are perpendicular to each other are added or subtracted the resultant is always 45° from each of them)

Hence , this is the required solution .

A change in which property of light will have no effect on whether or not the photoelectric effect occurs??? Frequently energy intensity and wavelength

Answers

The intensity of the light has no connection with the photoelectric effect.

That's what was so baffling about it before the particle nature of light
was suspected ... a match with a blue flame might stimulate the
photoelectric effect, but a high-power red searchlight couldn't do it.

Answer: intensity

Explanation:

A compass needle normally points toward Earth’s magnetic pole, which is near the North Pole. Which best explains why the needle moves away from the pole when it comes close to a current-carrying wire?-Current within the wire weakens the magnetic force of the pole.
-Magnetism surrounding the wire weakens the magnetic force of the pole.
-Magnetism surrounding the wire draws the needle toward the wire.

Answers

Answer

-Magnetism surrounding the wire draws the needle toward the wire.

Explanation
When a compass needle is placed near a conductor carrying current, it deflects to one side. 
This happens because the magnetic field due to the needle interact with electric fields around the conductor carrying carrying current resulting to a force that makes the needle to deflet. 
The best answer that suits the question asked is -Magnetism surrounding the wire draws the needle toward the wire.
A compass needle normally points toward Earth’s magnetic pole, which is near the North Pole. The best explanation why the needle moves away from the pole when it comes close to a current-carrying wire is Magnetism surrounding the wire draws the needle toward the wire.

Yall i need this asap

Answers

ASAP Ferg?
Edge 2020
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