PHYSICS HIGH SCHOOL

When using science to investigate physical phenomena, which characteristic of the event must exist?predictable
observable
provable
readable

Answers

Answer 1
Answer: In my opinion, the correct answer from the choices listed above would be the second option. When using science to investigate physical phenomena, the event should be observable. Hope this answers the question. Have a nice day. Feel free to ask more questions.
Answer 2
Answer:

The answer is:

When using science to investigate physical phenomena, observable  must exist.

The explanation:

In physics, an observable is a dynamic variable that can be measured. Examples include position and momentum. ... In quantum physics, it is an operator, or gauge, where the property of the system state can be determined by some sequence of physical operations.

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Andrew drives to his friend's house, which is 60 miles to the east. After visiting, he travels 25 miles to the west to visit his grandparents. What is Andrew's displacement?

Answers

Andrew's displacement while visiting his grandparents is 35 miles to the east.

What is displacement?

The displacement is the shortest distance travelled by the particle. It is the vector quantity which represents both the magnitude and direction.

Given Andrew drives to his friend's house, which is 60 miles to the east. After visiting, he travels 25 miles to the west to visit his grandparents.

The displacement will be

60 miles to the east - 25 miles to the west = 35 miles to the east

Thus, the Andrew's displacement is 35 miles to the east.

Learn more about displacement.

brainly.com/question/11934397

#SPJ2
A few miles like 23 I’m thinking

What is the charge of fluorine if it gains 1 electron

Answers

Its charge becomes - 1

A ball rolls from point A to point B. The total energy of the ball at point A isn’t the same as the sum of its potential energy and kinetic energy at point B. Which statement best explains this situation?The rolling ball doesn’t follow the law of conservation of energy.

Some of the ball’s energy is transformed to thermal energy.

The rolling ball loses some of its energy because of gravity.

The ball absorbs some of its own potential energy.

Answers

The rolling ball loses some of its energy because of gravity. Gravity and friction are two factors that slows the acceleration of the ball causing the ball to slow down at point B. If the situation is a free fall, then gravity is a factor, but if it is in a horizontal displacement,then there is friction that counterflows against the applied force.

Some of the ball’s energy is transformed to thermal energy.

Conservation of mechanical energy

The principle of conservation of energy states that sum of potential energy and kinetic energy is constant.

M.A = P.E + K.E

where;

  • P.E is the potential energy
  • K.E is the kinetic energy

The mechanical energy is always conserved, although it may be converted from one form to another.

The rolling ball follows the law of conservation of energy, the lost energy may be transformed to thermal energy.

Learn more about conservation of energy: brainly.com/question/166559

1. Calculate the resistance of a 12v, 20-amp circuit.

Answers

Answer:

R = 0.6 ohms

Explanation:

We have,

Voltage of the circuit is 12 V

Current flowing in the circuit is 20 A

It is required to find the resistance of the circuit. Ohm'slaw gives the relationship between voltage, current and resistance. It is given by :

V=IR

R = resistance

R=(V)/(I)\n\nR=(12)/(20)\n\nR=0.6\ \Omega

so, the resistance of the circuit is 0.6 ohms.

Explain the mechanism by which AC (alternating current) through the primary circuit of a transformer produces an alternating voltage and current in the secondary coil. Then explain why this would or would not work with DC (nonalternating current) in the primary coil.

Answers

Answer:

It is based on the principle of electromagnetic induction.

Explanation:

When a magnetic flux linked with a coil changes, an induced emf and induced current is developed in the coil. This phenomenon is called electromagnetic induction.

AC current is time varying sinusoidal current, but DC current is steady current.

When an AC current pass through the primary coil of transformer, the magnetic flux linked with the coil changes. This magnetic flux is linked with the secondary coil which is placed near to the primary coil. As the flux changes in the secondary coil, the induced voltage and current is produced in the secondary coil of transformer.

In case of DC current, there is no changing flux because DC current is steady current, so DC current would not work in case of transformer.
The right answer for the question that is being asked and shown above is that: "It takes a changing magnetic field to create an electric field. So if it was DC the magnetic field from the primary would be unchanging, and no voltage would be induced." 

What is the persistent fear of snow falling

Answers

Chionophobia is the extreme dislike or fear of snow.

The word originates from Greek 'chion' meaning snow and 'phobos'
meaning fear, aversion or dread. People with Chionophobia often
understand that their fear is unfounded and weird. However, they
are unable to control it.

Another contributor was the first to answer the question correctly, and in fact,
I learned the answer from that earlier post.  If I could only remember who it was,
I would give them a big shout-out.  Their answer was deleted by a moderator
because it didn't have an explanation with it. 
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