PHYSICS HIGH SCHOOL

If a wave hits a smooth surface at an angle of incidence of 40 degrees, the angle of reflection is A. 40 degrees.
B. 0 degrees.
C. 90 degrees.
D. 80 degrees.

Answers

Answer 1
Answer: the angle of incidence is equal to the angle of reflection. If a wave hits a smooth surface at an angle of incidence of 40 degrees then the angle of reflection is 40 degrees.
Answer 2
Answer:
D. 80 degrees.


The part of the ear where sound wave compressions and rarefactions cause the eardrum to vibrate is the middle ear. The 8th nerve in the inner ear actually converts the mechanical energy to electrical energy for transmitting to the brain. A membrane called the tympanic membrane separates the middle ear from the outer ear. Whenever a sound reaches the ear, it creates a sound wave that creates vibration in the eardrum. The pressure when high pushes the membrane inwards while low pressure sound waves helps the eardrum to come outwards.   

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How does a water molecule transfer from the ocean to form part of a cloud in the atmosphere?A.
precipitation from the ocean and then evaporation into a cloud


B.
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C.
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D.
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Answers

The right answer for the question that is being asked and shown above is that: "B. condensation from the ocean and then evaporation into a cloud." a water molecule transfer from the ocean to form part of a cloud in the atmosphere is that condensation from the ocean and then evaporation into a cloud

Answer:

b

Explanation:

that to somebody who answered!

Why was the idea of plate tectonics difficult for many scientists to accept for many years after it was first introduced?SCIENCE QUESTION

Answers

It's kind of funny really. The guy who invented the idea in the first place had actually been made fun of because the thought of that happening was improbable in their mind. Also, Wegener ( the guy who invented the idea) was not even a geologist but a meteorologist. But later it had been backed up due to earthquakes being record consecutively in one area, and the graphs turning out differently.

if the light completed the 71.0-km round trip in the time it took the mirror to complete one-eighth of a revolution, what is the speed of light?

Answers

What light ?
What mirror ?

What kind of scientist investigation involve making observations

Answers

Scientists need to make observations when measuring growth rates of different organisms, when observing mating rituals of animals, and when determining characteristics of new substances. These are but a few examples.
When you study animals.

Which of the following best describes the magnetic field lines around an isolated, permanent bar magnet?A. The field lines go from the magnet's south pole into its north pole.
B. The field points out along radial lines from the bar magnet, extending straight out to infinity.
C. The field lines go from the magnet's north pole into its south pole.
D. The field points straight into the bar magnet along radial lines that extend to infinity.

Answers

Correct Answer: 
Option C. The field lines go from the magnet's north pole into its south pole.

The magnetic field lines of a magnet always emerge from its North pole and enter back in the south pole, as shown in the image attached with.
Therefore, option C is the correct answer

Answer:

c

Explanation:

How much voltage would be necessary to generate 10 amps of current in a circuit that has 5 ohms ofresistance?

Answers

Voltage would be necessary to generate 10 amps of current in a circuit that has 5 ohms of resistance will be 50 V

What is ohm's law ?

Ohm's law is a law that states that the voltage across a resistor is directly proportional to the current flowing through the resistance

using ohm's law

V  = IR

V = voltage in a circuit = ?

I = current = 10 A

R = Total resistance in the circuit  = 5 ohm

V  = IR

    = 10 A * 5 ohm

    = 50 V

voltage would be necessary to generate 10 amps of current in a circuit that has 5 ohms of resistance will be 50 V

learn more about ohm's law

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U = R * I \rightarrow U = 10 * 5 = 50 V
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