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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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How do you ask someone out?

vazorg [7]

talk, make conversation. text isnt always the answer, but sadly now it is. text them or better yet, call them. you can talk and then do not just blurt it out. say it calmly. they say yes, congrats, but if they say no, do not have a mental breakdown. it might ruin a friendship.

4 0

3 years ago

Read 2 more answers

The quantity that has units kg m2/sec2 is known as a

Svetach [21]

Answer:

Energy

Explanation:

The unit is $kg\ m^2/s^2$ .

We can see the formula of kinetic energy is

$K.E=\frac{1}{2} mv^2$

Where $m$ is the mass and $v$ is the velocity of the object.

Which means its unit would be kg times square of meter per second, that is $kg\ m^2/s^2$ . Which is often referred as Joule.

Also, when look at the formula of work done by an object.

$W=f\times d$

Where $f$ is the force and $d$ is the distance traveled by the object due to force $f$ .

We an see that its unit is kg meter per second squared times meter. That is equivalent to $kg\ m^2/s^2$ . This is also a type of energy.

So, the unit $kg\ m^2/s^2$ is the unit of energy.

8 0

3 years ago

Two movers use a rope system to lift a box to a third-story apartment. They do 1,200 J of work on the rope system, and the rope

xeze [42]

Efficiency is defined as the measure of the amount of work or energy is conserved in a certain process. At all times, in every process, work or energy is always lost or wasted due to certain interference. Not all work given is converted to useful work or energy. Thus , efficiency is calculated by dividing the energy or work output to the energy or work input then the value is multiplied by 100 to express efficiency as percentage.

Efficiency = work output / work input
Efficiency = (1020 J / 1200 J) = 85%

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3 years ago

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stephanie, who has a mass of 75 kg is driving and suddenly slams on her brakes to avoid hitting a student crossing blanco road.

11111nata11111 [884]

Answer:

25 m/s

Explanation:

Impulse = change in momentum

F Δt = m Δv

(3750 N) (0.5 s) = (75 kg) (v − 0 m/s)

v = 25 m/s