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jonny [76]
3 years ago
11

1. what are valence electrons?

Physics
2 answers:
Aleks04 [339]3 years ago
6 0
<span>Valence electrons are electrons in the outermost shell available for bonding</span>
In-s [12.5K]3 years ago
3 0
For number one the answer would be B

I think the second one B, 24
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In Bolt’s fastest 100 meter, he accelerated from the starting block to a speed of 27.8 mi/hr in 9.58 s. What was his acceleratio
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Explanation:

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Answer is 2.90mi/hr/s

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2 years ago
When a 4.32 kg object is hung vertically on a certain light spring that obeys Hooke's Law, the spring stretches 2.92 cm.
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(a) 1.01 cm

First of all, we need to find the spring constant of the spring.

The force initially applied to the spring is equal to the weight of the block hanging on it:

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where m = 4.32 kg is the mass of the block and g = 9.8 m/s^2 is the acceleration of gravity.

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We can find the spring constant by using Hooke's law:

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x'=\frac{F'}{k}=\frac{14.7}{1448.6}=0.0101 m = 1.01 cm

(b) 1.16 J

The work that must be done on the spring is equal to the elastic potential energy that would be stored in the spring, therefore:

W=\frac{1}{2}kx^2

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k = 1448.6 N/m is the spring constant

x = 4.00 cm = 0.04 m is the new stretching

Solving the equation, we find the work that must be done by the external force:

W=\frac{1}{2}(1448.6)(0.04)^2=1.16 J

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