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RideAnS [48]
3 years ago
6

Name three elements that are good conductors of heat

Physics
1 answer:
Vera_Pavlovna [14]3 years ago
7 0
Copper, gold and silver are three of them.
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Your friend wants to make an electromagnet strong enough to lift a heavy metal object. What are some suggestions you would give
Korolek [52]

Answer:

If you want, you can make an electromagnet by wrapping wires around a used paper towel roll, but if you want a strong magnet, wrap them around an iron core instead.

Explanation:

sorry if i'm wrong and this does not help please rate this so i can get feedback

4 0
2 years ago
A spring stores potential energy U0 when it is compressed a distance x0 from its uncompressed length.
beks73 [17]

Answer:

Explanation:

Using Hooke's law

Elastic potential energy = 1/2 K x²

K is elastic constant of the spring

x is the extension of the spring

a) The elastic potential energy when the spring is compressed twice as much  Uel = 1/2 k (2x₀) ² =  4 (1/2 kx₀²)= 4 U₀

b) when is compressed half as much Uel = 1/2 k \frac{x0}{4} ^{2} = \frac{1}{4} ( U₀)

c) make x₀ subject of the formula in the equation for elastic potential

      x₀ =\sqrt{\frac{2U0}{K}  }

x, the amount it will compressed to tore twice as much energy = \sqrt{\frac{2 (2U0)}{K} }

x = √2 x₀

d) x₁, the new length it must be compressed to store half as much energy = \sqrt{\frac{2 (\frac{1}{2})U0 }{K} }

x₁ = \sqrt{\frac{1}{2} } x₀

5 0
3 years ago
A golf ball is hit with an initial velocity of 20m/s at an angle of 30° to the horizontal. calculate;
svp [43]

Answer:

tcucugxojfjgfojcigxuogoudyifodtufukdutfuocyjxuogu

3 0
2 years ago
PHYSICS, WORTH 10 POINTS!
11Alexandr11 [23.1K]

Answer:

Magnetic field lines can be drawn by moving a small compass from point to point around a magnet. At each point, draw a short line in the direction of the compass needle. Joining the points together reveals the path of the magnetic field lines.

Explanation:

5 0
2 years ago
Do all of them please and explain
kondaur [170]

At 305 and 309 it was negative because it is going down


at 300 and 301 and 305 it was positive because its going up


at 302/303/304/306/309 she wasn't accelerating at all because it is staying the same

5 0
3 years ago
Read 2 more answers
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