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timofeeve [1]
3 years ago
14

A student holds a magnet 1 m from a paper clip and sees no evidence of a force acting between the two. When the student brings t

he magnet 1 cm
away from the paper clip, the paper clip begins to slide toward the magnet. Which statement best explains these results?
A) The material in the paper clip was not a magnetic material until the magnet was moved closer
B) The magnet did not have a magnetic field until it was close to the paper clip
C) The paper clip repelled the magnet at the farther distance,
D) The magnetic field of the magnet was too weak to move the paper clip at the farther distance.
Physics
1 answer:
Vera_Pavlovna [14]3 years ago
3 0

Answer:

the answer is d

Explanation:

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4 years ago
A barge floating in fresh water (rho = 1000 kg/m^3) is shaped like a hollow rectangular prism with base area A = 550 m^2 and hei
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Answer:

Explanation:

A )

When empty , H₀ length of barge is inside water .

volume of barge inside water = A x H₀

Weight of displaced water = AH₀ x ρ x g

Buoyant force = weight of displaced water = AH₀ ρg

B)

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6 0
3 years ago
A ball moves along a table at a constant velocity and then rolls off the edge of the table. The forces that should be included i
Len [333]

Answer:

Gravity

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When the ball is falling to the ground, it is already detached from the table, so the table does not exert any force on it.

Gravity is always present, therefore it is acting on the ball (acting downward), so it must be included into the free-body diagram. Apart from that, there are no other forces acting on the ball (if we neglect air resistance, which is negligible, and it is not mentioned in the options given), therefore the only force which has to be included in the diagram is gravity.

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3 years ago
How fast is a plane traveling if it traveled 400 km in 30 minutes
olganol [36]
  • Answer:

<em>800 km/h</em>

  • Explanation:

<em>Hi there ! </em>

<em>1 hour = 60 min</em>

<em>30 min = 0.5 hour</em>

<em />

<em>400 km ............ 0.5 h</em>

<em>    x km .............. 1 h</em>

<em />

<em>x = 400km×1h/0.5h</em>

<em>= 800 km/h</em>

<em />

<em>Good luck</em>

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3 years ago
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