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3 years ago

12

You feel a static electric shock when free electrons build up on your body then you touch a

1 answer:

Arlecino [84]3 years ago

6 0

Unit: 10 TEST
4. A- charger

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Scientists described light as a wave because the results of many experiments with light demonstrated that light behaves as a wav

Ksju [112]

The answer is Data collected from many experiments could not be explained.

Explanation:

With pretty much every science theory, the theory can not change without valid experimentation by multiple professionals.

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2 years ago

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___ is produced when grains of quartz in sandstone are welded together when the rock is subjected to high temperatures.

Galina-37 [17]

Quartzite is produced when grains of quartz in sandstone are welded together when the rock is subjected to high temperatures. Quartzite<span> or Quarzit is a hard, non-foliated metamorphic rock which was originally pure quartz sandstone. </span><span>It is formed when a quartz-rich sandstone is altered by the heat, pressure, </span>

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2 years ago

What must the charge (sign and magnitude) of a 1.45-g particle be for it to remain stationary when placed in a downward-directed

tekilochka [14]

Answer:

charge will be equal to $2.03\times 10^{-5}C$

Explanation:

We have given mass of the particle m = 1.45 gram = 0.00145 kg

Acceleration due to gravity $g=9.8m/sec^2$

Electric field E = 700 N/C

Electric force will be equal to $F=qE$ , here q is charge and E is electric field

For particle to be stationary this force must be equal to force due to gravity , that is mg force

So qE = mg

$q=\frac{mg}{E}=\frac{0.00145\times 9.8}{700}=2.03\times 10^{-5}C$

So charge will be equal to $2.03\times 10^{-5}C$

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2 years ago

Which statement correctly describes magnetic field lines?

skelet666 [1.2K]

The answer is A. the fields lines never cross, if you bring another magnet near it, the lines work just compress

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3 years ago

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The plank is 5.1 meters long and has a mass of 9.2 kg, ack has a mass of 93.6 kg, and Diane has a mass of 64.2 kg. Assuming Dian

kodGreya [7K]

Answer:

The answer is 0.8 m

Explanation:

According the attached diagram, if we take the momentum in the point 0:

$\frac{m_{D}*5.1 }{2} =m_{J} *X$

Where

mD = mass of Diane = 64.2 kg

mJ = mass of Jack = 93.6 kg

Replacing:

$X=\frac{\frac{64.2*5.1}{2} }{93.6} =1.75m$

$\frac{L}{2} -X=Y=\frac{5.1}{2} -1.75\\Y=0.8m$

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3 years ago