Question

i need help with a few science questions

Answer 1

You can find electric power lines under the ground by looking for magnetic fields at ground level. This is best explained by which of these statements?
A) All wires have magnetic materials in them.
B) An electric current in a wire produces a magnetic field.
C) The power company puts magnets to help find the power lines.
D) The iron in the ground is disturbed by the power lines creating magnetic fields.

Answer 2

Ask away and i will help :)

Answer 3

What is your answer?

Answer 4

i think its b but im not sure

Answer 5

Yes, in fact you are correct

Answer 6

yay i need help with 3 more

Answer 7

ok ask away :)

Answer 8

http://www.usatestprep.com/modules/gallery/files/39/3929/3929.png
The graph represents the gravitational attraction between two equal masses vs. their distance apart, which statement BEST describes the information presented by the graph?
A) Distance is only a factor in space, not on earth.
B) Gravitational attraction is directly proportional to distance.
C) Gravitational attraction is inversely proportional to distance.
D) Gravitational attraction is not related to the distance between objects.

Answer 9

i think this one is b to

Answer 10

Yes, i believe you are correct

Answer 11

http://www.usatestprep.com/modules/gallery/files/53/5355/5355.png
Consider the circuit if switches are added at points A, B, C, and D. All the switches are closed EXCEPT the switch at position D, which is left open. What is the result of this?
A) Only light 4 will go out.
B) Only lights 3 and 4 will go out.
C) All of the lights will go out.
D) None of the lights will go out.

Answer 12

i think its a but im 25% sure

Answer 13

No it is c i beleive

Answer 14

ok

Answer 15

Any more?

Answer 16

yep 3

Answer 17

Gravity is a force between any two objects with mass. Why doesn't a person feel a gravitational force between him/herself and another person?
A) A person doesn't exert a gravitational force.
B) The two gravitational forces cancel each other out.
C) The gravitational forces of people is so small it is overshadowed by that of Earth.
D) There are so many people we are actually balanced by all the different gravitational forces.

Answer 18

im pretty sure this one is c

Answer 19

Yes c is correct, good job