PHYSICS HIGH SCHOOL

Which electrical protective device is designed to detect a difference in current between circuit wires and interrupt the circuit and stop the flow of electricity? (1 point)a. GFCI
b. Circuit breaker
c. Fuse
d. Insulation

Answers

Answer 1
Answer: the electrical protective device is designed to detect a difference in current between circuit wires and interrupt the circuit and stop the flow of electricity is : A.GFCI
It stands for Grand Fault circuit interruptor, this will open the circuit when a difference in current is detected between the existing wires

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within a book on a desk, there are billions of forces pushing and pulling on all the molecules. why is it these forces never by chance add up to a net force in one direction, causing the book to accelerate "spontaneously" across the desk?

Answers

For exactly the same reason that all the molecules of air in the room, each one
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By the way, there are not billions of forces pushing and pulling on all the
molecules in the book, but we know what you mean.   

The answer is in the behavior of large numbers of 'randomly distributed' things.
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The probability of the book levitating off the desk, or all the air in the room
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It's NOT correct to say that it CAN'T ever happen, but it's totally rational,
reasonable, pragmatic, and practical to live our lives as if it can never happen,
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Newton's law states that for every action there is an equal and opposite reaction. therefore as the book is pulled down (towards the desk) the desk is pushing up against the book with an equal force. (this goes for all forces

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Answers

Well mostly because it's for oceans and lakes that have waves. so if you don't live near any of these, you wouldn't be getting power. 
If you live near a sea or ocean, You Would be getting power. Because the waves are from large bodies of water (sea, ocean ...)

Question 17 options:A 71.8 kg man goes from an area where the acceleration due to gravity is 9.79 m/s2 to an area where the acceleration due to gravity is 9.82 m/s2.What is the change (in kilograms), to the mass of the man?  Respond to three significant digits expressed as a.bc and remember to record your responses for a, b, and c in that order.(i was thinking the answer would be 0 but im not sure)

Answers

Mass doesn't change, no matter where you take it.
Your first impression of ' 0 ' is totally correct.

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Answers

Answer:

the velocity is 200

Explanation:
the average velocity is 200

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Answers

the ground is less rough, so there is less friction between the ground and the wheels of the car. This makes it unable for the car to move forward

Imagine a 10kg block moving with a velocity of 20m/s to the left. Calculate the kinetic energy of this block.

Answers

KE =1/2mv^2=0.5 * 10 * 20^2= 5*400=2000
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