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Artist 52 [7]
3 years ago
8

What happens to the chemical energy of a lithium-ion battery as it is discharged to power a laptop computer? Does it increase, d

ecrease, or remain unchanged?
Physics
1 answer:
Scorpion4ik [409]3 years ago
6 0

Answer:

Decrease

Explanation:

When the LI-ion battery discharges to power a laptop or computer the charges flow in the opposite direction, i.e., Li-ion moves to the positive electrode and generates energy for powering the laptop.

This happens in accordance to the law of conservation of energy as per which we can neither create nor destroy energy all that can be done is the transformation of this energy into interchangeable forms.

Here, the Chemical energy of the Li-ion battery while powering the laptop changes into electrical energy in order to charge the laptop and hence the is a decrease in the chemical potential energy of the battery as it discharges.

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Jupiter's moon Io has active volcanoes (in fact, it is the most volcanically active body in the solar system) that eject materia
kramer

Answer:

The height reached by the material on Earth is 91 km.

Explanation:

Given that,

Mass M_{Io}=8.93\times10^{22}\ kg

Radius = 1821 km

Height h_{Io}=500\ km

Suppose we need to find that how high would this material go on earth if it were ejected with the same speed as on Io?

We need to calculate the acceleration due to gravity on Io

Using formula of gravity

g =\dfrac{GM_{Io}}{(R_{Io})^2}

Put the value into the formula

g=\dfrac{6.67\times10^{-11}\times8.93\times10^{22}}{(1821\times10^{3})^2}

g=1.79\ m/s^2

Let  v be the speed at which the material is ejected.

We need to calculate the height

Using the formula of height

H=\dfrac{v^2}{2g}

Using ratio of height of earth and height of Io

\dfrac{H_{e}}{H_{Io}}=\dfrac{\dfrac{v^2}{2g_{e}}}{\dfrac{v^2}{2g_{Io}}}

\dfrac{H_{e}}{H_{Io}}=\dfrac{g_{Io}}{g_{e}}

Put the value into the formula

\dfrac{H_{e}}{H_{Io}}=\dfrac{1.79}{9.8}

\dfrac{H_{e}}{H_{Io}}=0.182

H_{e}=0.182\times H_{Io}

H_{e}=0.182\times500

H_{e}=91\ km

Hence, The height reached by the material on Earth is 91 km.

3 0
3 years ago
Mercury has an average disease to the sun of 0.39 AU. In two or more complete sentences, explain how to calculate the orbital pe
alukav5142 [94]

Answer: 88 Earth days

Explanation:

According to the Kepler Third  Law of Planetary motion <em>“The square of the orbital period of a planet is proportional to the cube of the semi-major axis (size) of its orbit”. </em>

<em />

In other words, this law states a relation between the orbital period T of a body (moon, planet, satellite) orbiting a greater body in space with the size a of its orbit:

T^{2}=a^{3} (1)

If we assume the orbit is circular and apply Newton's law of motion and the Universal Law of Gravity we have:

T^{2}=\frac{4\pi^{2}}{GM}a^{3} (2)

Where M is the mass of the massive object and G is the universal gravitation constant. If we assume M constant and larger enough to consider G  really small, we can write a general form of this law:

MT^{2}=a^{3} (3)

Where T is in units of Earth years,  a is in AU (<u>1 Astronomical Unit is the average distane between the Earth and the Sun)</u> and  M is the mass of the central object  in units of the mass of the Sun.

This means when we are making calculations with planets in our solar system  M=1.

Hnece, in the case of Mercury:

(1)T^{2}=(0.39 AU)^{3} (4)

Isolating T:

T=\sqrt{(0.39 AU)^{3}} (5)

T=0.243 Earth-years \frac{365 days}{1 Earth-year}=88.6 days \approx 88 days (6)

This means the period of Mercury is 88 days.

7 0
3 years ago
Brass is an alloy made from copper and zinc a 0.59 kg brass sample at 98.0 is dropped into 2.80 kg of water at 5.0 c if the equi
zhannawk [14.2K]
The specific heat capacity of brass would be ranked between 0 and infinity
3 0
3 years ago
Read 2 more answers
The lowest note on the piano has the longest string to vibrate. How does the lowest note compare if you consider the column of a
SashulF [63]
The piano strings<span> for </span>low notes<span> are heavier, </span>have<span> more inertia, and </span>vibrate<span> at a lower frequency a lower pitch than lighter </span>strings<span> of the same </span>string<span> tension. Loudness involves how hard the keys are struck, which affects the amplitudes of the </span>vibrating strings<span>. the touch sensitivity of the </span>piano<span> distinguishes it from earlier.



Do you undertand?????

</span>
3 0
3 years ago
25 POINTS pls help me
djverab [1.8K]

Answer:

the answer is c google bohj

3 0
4 years ago
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