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3 years ago

14

Jack tries to place magnets on the door of his refrigerator. He observes that the magnets don’t stick. He guesses that the door

of the refrigerator is made of a nonmagnetic substance. What stage of scientific investigation does his guess represent?

1 answer:

ivanzaharov [21]3 years ago

5 0

I think an education guess for this one because he is thinking about what to guess probably.

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denis-greek [22]

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7 0

3 years ago

Two parallel plates of equal area carry equal and opposite charge Q0. The potential difference between the two plates is measure

jonny [76]

Answer:

Q₁ > Qo

C₁ > Co

Explanation:

We know that

$C_o=\dfrac{\varepsilon _oA}{d}$

Lets take relative permitivity of green plate =k

So new capacitance value

$C_1=k\dfrac{\varepsilon _oA}{d}$

From above two expression we can say that

C₁ = kCo

k > 1

So we can say that

C₁ > Co

We also know that

Co = Qo V

C₁ = Q₁ V

From above we can say that

Co/C₁ = Qo/Q₁ ( C₁ > Co ⇒Co/C₁ <1)

Co/C₁ <1

So we can say that

Qo/Q₁ < 1

Q₁ > Qo

3 0

3 years ago

Two identical rocks are dropped from different heights. The higher one starts out four times as high as the lower one. How much

elena-14-01-66 [18.8K]

Answer:

it is going 4 times faster.

Explanation:

8 0

3 years ago

1. Voice Of Which Of The Following Is Likely To Have The Minimum Frequency?

rodikova [14]

Answer:

my last answer to a question A man's sound is of the lower pitch as compared to the other options. And we know that pitch is directly proportional to the frequency of sound. So, the frequency of man's voice will be the minimum among all the options.

3 0

3 years ago

Gravitational acceleration for the bodies falling freely is

STatiana [176]

Answer:

g= 9.81m/s..................

3 0

3 years ago