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3 years ago

Select the correct answer.

Physics

2 answers:

elixir [45]3 years ago

5 0

A) Energy is absorbed in the reaction.

Such reactions are called endothermic reactions.

svetoff [14.1K]3 years ago

3 0

Answer:

<h2>A. Energy is absorbed in the reaction.</h2>

Explanation:

In chemistry, there are two types of reactions: Exothermic and Endothermic Reactions.

An exothermic reaction occurs when the reactants have higher energy than the products, the effect is energy released.

On the contrary, an endothermic reaction is when the products have higher energy than reactants, and the energy is absorbed.

So, based on these concepts, the correct answer is A, in a given chemical reaction, if the energy of the products is greater than the energy of the reactants, energy is absorbed.

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An object that weighs 2.450 N is attached to an ideal massless spring and undergoes simple harmonic oscillations with a period o

Viktor [21]

Answer:

Spring constant, k = 24.1 N/m

Explanation:

Given that,

Weight of the object, W = 2.45 N

Time period of oscillation of simple harmonic motion, T = 0.64 s

To find,

Spring constant of the spring.

Solution,

In case of simple harmonic motion, the time period of oscillation is given by :

$T=2\pi\sqrt{\dfrac{m}{k}}$

m is the mass of object

$m=\dfrac{W}{g}$

$m=\dfrac{2.45}{9.8}$

m = 0.25 kg

$k=\dfrac{4\pi^2m}{T^2}$

$k=\dfrac{4\pi^2\times 0.25}{(0.64)^2}$

k = 24.09 N/m

k = 24.11 N/m

So, the spring constant of the spring is 24.1 N/m.

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tankabanditka [31]

Answer:

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