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DiKsa [7]
3 years ago
13

Anna learned that every magnet has a north and a south end called poles. One day, while she is playing with magnets she notices

that when she puts the north end of a magnet near the south end of another magnet, they pull together. What can Anna conclude from her observation?
A) Opposite poles of magnets repel.
B) Opposite poles of magnets attract.
C) The north pole picks up iron nails.
D) Only the north pole has an attractive force.
Physics
2 answers:
alekssr [168]3 years ago
8 0
B i took the benchmark for k12

maria [59]3 years ago
4 0
B) opposite poles of magnets attract
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Explanation:

Initial speed of the rocket, u = 0

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v=u+at

v=25.4\times 3.39=86.10\ m/s    

Let x is the initial position of the rocket. Using third equation of kinematics as :

v^2=u^2+2ax_o

x_o=\dfrac{v^2}{2a}

x_o=\dfrac{86.10^2}{2\times 25.4}=145.92\ m  

Let x_o is the position at the maximum height. Again using equation of motion as :

v^2-u^2=2a(x-x_o)

Now a=-g and v and u will interchange

u^2=2g(x-x_o)

x=x_o+\dfrac{u^2}{2g}

x=145.92+\dfrac{(86.10)^2}{2\times 9.8}

x = 524.14 meters

Hence, this is the required solution.

5 0
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How is a conducter different from an insulater
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Conductors have magnetic fields; insulators do not have magnetic fields. Conductors do not have magnetic fields; insulators do have magnetic fields. ... In a conductor, electric current cannot flow freely; in an insulator, it can flow freely.

3 0
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Here are 5:

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KE=97300J

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KE=97300J

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