Answer:
The magnets need to be placed with red closest to blue.
Opposite poles attract.
The magnets will be attracted to each other with enough force to stick together.
Explanation:
Answer:
X= 700 Joules
Explanation:
The question asked about the efficiency of the work done.
The formula for efficiency is: Efficiency = (Useful output / input work) * 100%
The useful output given in the question is 140J, the question asked for input work. Let X be the input work. It is also given that the efficiency is 20%.
Using the formula of efficiency,
20 = (140/X) * 100
So, we simply solve the above equation.
X= 140*100/20
X= 700 Joules
D.<span>Wave 3 resulted from constructive interference, and Wave 4 resulted from destructive interference.
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Answer:B
Explanation: The book is thinner making magnets attraction stronger, making the paper clip harder to move
B is the answer, I’m really good at this subject