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cluponka [151]
3 years ago
15

Can anyone give me the description of the element mercury is positioned on the periodic table of elements and a list of other el

ements that have similar properties. I need this ASAP. Thanks.

Physics
1 answer:
garri49 [273]3 years ago
3 0
I hope this helps you good luck

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A 1.31 kg object is attached to a horizontal spring of force constant 2.70 N/cm and is started oscillating by pulling it 6.20 cm
goldfiish [28.3K]

Answer:

The answer is below

Explanation:

a) The change in energy is the difference between the final energy and the initial energy.

ΔE (energy change) = Ef (final energy) - Ei (initial energy)

\Delta E=\frac{1}{2}kA_f^2 -\frac{1}{2}kA_i^2\\\\k=force\ constant=2.7\ N/cm=270\ N/m, A_f=final\ dispalacment= 3.7\ cm=0.037\ m,\\ A_i=initial \ displacement = 6.2\ cm=0.062\ m\\\\Hence:\\\\\Delta E=\frac{1}{2}(270)(0.037)^2 -\frac{1}{2}(270)(0.062)^2\\\\\Delta E=-0.334 \ J

The negative sign shows that energy is lost to the environment. Hence 0.334 J is lost to the environment.

b) According to the law of conservation of energy, energy cannot be created or destroyed but transformed from one form to another.

The oscillating object loses energy due to wind resistance, friction between the spring and the object. Given that the air is frictionless, hence the energy loss is due to friction which is converted to heat.

6 0
3 years ago
Joel uses a crew hammer to remove a nail from a wall . He applied a force 40 newtons on the hammer. The hammer applied a force o
zaharov [31]
By mechanical advantage 160/40=4
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4 years ago
How much force is required to accelerate a 50 kg mass at 2 m/s2?
-BARSIC- [3]
=0.5 x40 
<span>= (calculate it) </span>
<span>2. F= -.45 x 41 </span>
<span>= </span>
<span>3. F=20 x 12 </span>
<span>= </span>
<span>4. F=50 x 30 </span>
<span>= </span>

<span>I believe you can go on from here, remember its easy </span>

<span>for the last 2 just rearange the formual </span>
<span>for 9 it will be a=F/m and 10. m=f/a </span>
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How do the parts of your brain function
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The brain also helps such as breathing maintaining blood pressure and releasing hormones . 
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What are valence electrons used for by an element?
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Valence electrons can be transferred or shared with different atoms.
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