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melamori03 [73]

3 years ago

12

Chemical energy is a form of A. kinetic energy only. B. both potential and kinetic energy. C. neither potential nor kinetic ener

gy. D. potential energy only. Reset

1 answer:

svetlana [45]3 years ago

6 0

wrong. If its for the study island its potential energy only.

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A child is swinging back and forth on a swing. Changes in her kinetic and potential energy are happening each moment. At which p

dedylja [7]

Answer:

The maximum potential energy of the child will be maximum at the two end points.

The maximum kinetic energy of the <em>child </em>occurs at the lowest point of the swing.

The potential energy of the child depends on the displacement of the child.

P.E = mgh

The maximum height attained occurs at the two end points of her swing motion.

Thus, the maximum potential energy of the child will be maximum at the two end points.

The kinetic energy of the child depends on the velocity of the child

K.E = ¹/₂mv²

The maximum velocity of the swing occurs at the lowest point of the swing.

Thus, the maximum kinetic energy of the child occurs at the lowest point of the swing.

Hope this helps!

5 0

3 years ago

Read 2 more answers

Which group of elements ,in the periodic table, would most likely be used for electrical wires?

grin007 [14]

<span>Most electrical wiring uses copper</span>

5 0

3 years ago

Lithium has two stable isotopes with masses of 6.01512 amu and 7.01600 amu. The average molar mass of Li is 6.941 amu. What is t

Dvinal [7]

Answer : The percent abundance of Li isotope-1 and Li isotope-2 is, 6.94 % and 93.1 % respectively.

Explanation :

Average atomic mass of an element is defined as the sum of masses of each isotope each multiplied by their natural fractional abundance.

Formula used to calculate average atomic mass follows:

$\text{Average atomic mass }=\sum_{i=1}^n\text{(Atomic mass of an isotopes)}_i\times \text{(Fractional abundance})_i$ .....(1)

Let the fractional abundance of Li isotope-1 be 'x' and the fractional abundance of Li isotope-2 will be '100-x'

For Li isotope-1 :

Mass of Li isotope-1 = 6.01512 amu

Fractional abundance of Li isotope-1 = x

For Li isotope-2 :

Mass of Li isotope-2 = 7.01600 amu

Fractional abundance of Li isotope-2 = 100-x

Average atomic mass of Li = 6.941 amu

Putting values in equation 1, we get:

$6.941=[(6.01512\times x)+(7.01600\times (100-x))]$

By solving the term 'x', we get:

$x=694.048$

Percent abundance of Li isotope-1 = $\frac{694.048}{100}=6.94\%$

Percent abundance of Li isotope-2 = 100 - x = 100-6.94 = 93.1 %

6 0

3 years ago

[Send a message] as you move across a row from left to right in the period table, atomic numbers of the elements

SashulF [63]

I think it might be D or B
And my other two might be A or C

6 0

4 years ago

Which of the following solutions is the most dilute.

Colt1911 [192]

Answer:

d and e

Explanation:

We have 5 solutions with different molar concentrations, that is, the quotient between the number of moles of solute and the liters of solution. This can be expressed as mol/L or M. The most dilute would be the one having the less number of moles of solute per liters of solution, that is, solution d or e, which have the same concentration. If we order them from the most diluted to the most concentrated, we get:

d = e < a < b < c

3 0

3 years ago