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alex41 [277]
3 years ago
5

for a certain chemical reaction, the reactants contain 52 kj of potential energy and the products contain 32 kj how much energy

is absorbed or released by the reaction. A.84 kj is released B.20 kj is released C. 20 kj is absorbed D.84 kj is absorbed
Physics
2 answers:
Luden [163]3 years ago
7 0
B, is the answer. (20 kj is released)
mojhsa [17]3 years ago
4 0

Answer:

B. 20 kj is released

Explanation:

A.P.E.X. CST

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A point charge q1q1 is held stationary at the origin. A second charge q2q2 is placed at point aa, and the electric potential ene
Yuri [45]

Explanation:

The given data is as follows.

            U_{a} = 5.4 \times 10^{-8} J

        W_{/text{a to b}} = -1.9 \times 10^{-8} J

        Electric potential energy (U_{b}) = ?

Formula to calculate electric potential energy is as follows.

            U_{b} = U_{a} - W_{/text{a to b}}

                        = 5.4 \times 10^{-8} J - (-1.9 \times 10^{-8} J)

                        = 7.3 \times 10^{-8} J

Thus, we can conclude that the electric potential energy of the pair of charges when the second charge is at point b is 7.3 \times 10^{-8} J.

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Du een Shem.<br>when we shake mango free, the mangoes fall<br>down, why?​
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Because it is a stone fruit

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What is the net force needed to lift a full grocery sack (weighing 210 N) uniformly? What is the net force
Stella [2.4K]

The net force needed to lift a full grocery sack uniformly is 32.115 N.

<h3>What is Net force?</h3>

When two or more forces are acting on the system of objects, then the to attain equilibrium, net force must be zero.

Given the weight of sack W = 210N and the acceleration a = 1.5m/s².

The mass of the sack will be

m = Weight / acceleration due to gravity

m = 210 N/9.81 m/s²

m = 21.41 kg

Using Newton's second law, the net force will be

F = mass x acceleration

F= 21.41 x 1.5

F = 32.115 N

Thus, the net force is 32.115 N.

Learn more about net force.

brainly.com/question/18031889

#SPJ1

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2 years ago
What is the time period of vibration?
Y_Kistochka [10]

Answer:

A time period is denoted by 'T' . It is the time to complete one cycle of vibration. As the frequency of a wave increases, the time period of the wave decreases. The unit for time period is 'seconds

HOPE IT HELPS :)

PLEASE MARK  IT THE BRAINLIEST!

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