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Harman [31]
3 years ago
11

How does the force of gravity between two bodies change when the distance between them doubles? 1. unable to determine; the mass

is needed. 2. doubles 3. halves 4. quadruples 5. remains the same 6. drops to one quarter of its original value?
Physics
1 answer:
Rzqust [24]3 years ago
7 0
6. Drop to one quarter of its original value
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Willa, the cartoon witch, dusts her crystal ball with her silk scarf, causing it to become charged with 5.0 x 10^ -9 C. Willa th
DIA [1.3K]

Answer:

The distance between the tip of her nose from the center of the crystal ball is 14.3 cm.

Explanation:

Given that,

Charge, q=5\times 10^{-9}\ C

The end of her nose experiences an electric field strengths of 2200 N/C

It is required to find the distance between the tip of her nose from the center of the crystal ball. The formula of the electric field is given by :

E=\dfrac{kq}{r^2}

r is distance

r=\sqrt{\dfrac{kq}{E}} \\\\r=\sqrt{\dfrac{9\times 10^9\times 5\times 10^{-9}}{2200}} \\\\r=0.143\ m\\\\r=14.3\ cm

So, the distance between the tip of her nose from the center of the crystal ball is 14.3 cm.

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An 84% efficient single pulley is used to lift a 230 kg piano 3.5 m. How much work must be input?
Sati [7]

Answer:

35%

Explanation:

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3 years ago
A scientist finds an unusual object and decides to study it. Which observation indicates that it is a living thing that is multi
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How many significant digits are in the number 204.0920<br>​
monitta

Answer:

Seven

Explanation:

The rules for significant digits are:

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  • Zeros between significant digits are also significant.
  • Trailing zeros are significant only after a decimal point.

Here, the 2, 4, 9, and 2 are significant because they are non-zero digits.

The first two 0s are significant because they are between significant digits.

The last 0 is significant because it is a trailing zero after a decimal point.

Therefore, all seven digits are significant.

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