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LuckyWell [14K]
2 years ago
13

In an exothermic reaction, energy is

Physics
2 answers:
tester [92]2 years ago
7 0

Answer: Exothermic reactions are reactions or processes that release energy, usually in the form of heat or light. In an exothermic reaction, energy is released because the total energy of the products is less than the total energy of the reactants.

Explanation:

Nutka1998 [239]2 years ago
5 0
  1. In Exothermic reaction energy is Thrown/Relased to the surroundings.
  2. In endothermic reaction, energy is absorbed from the surroundings.

Trick to identify:-

  • Exothermic reaction has +∆H sign on product side
  • Endothermic reaction has -∆H sign on product side or +∆H sign on reactant side
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Displacement: 6 meters

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Looking at the bottom standing wave in the picture, how many complete waves are present?
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the last one

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Which one of Newton's Laws fits this statement:
BabaBlast [244]

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3 years ago
An object starts at 4m/s and accelerates to 6m/s in 10 seconds. Find its displacement.
Natalka [10]

Answer:

Explanation:

The 2 equations we need here are, first:

a=\frac{v_f-v_0}{t} and then once we solve for the acceleration here:

v^2=v_0^2+2aΔx

Solving for acceleration:

a=\frac{6-4}{10}=\frac{1}{5}\frac{m}{s^2} and now we will use that in the other equation:

6^2=4^2+2(\frac{1}{5})Δx and

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6 0
3 years ago
The circuit below contains an ideal battery, four identical light bulbs, and a switch. The switch is initially open.
Dafna1 [17]

The question is incomplete! circuit figure is attached below and answer and explanation is provided below.

Answer:

Bulb_A = Bulb_B = Bulb_D and Bulb_C = 0.

Explanation:

What happens when switch is open?

When the switch is open Bulb_C is open circuited meaning that there is no way for the current to flow through it. This path offers infinite resistance to the current therefore, current will try to take a least resistance path that is through Bulb_B.

So eventually, when the switch is open the circuit becomes a simple series circuit with path From battery to Bulb_A to Bulb_B to Bulb_D to battery with Bulb_C = 0.

What happens in a series circuit?

We know that in a series circuit, there is only one path for the current to flow therefore, same current will flow through all the series Bulbs and their brightness will be same. Bulb_A = Bulb_B = Bulb_D

Brightness in a series circuit:

We also know know that in a series circuit, resistance gets summed up and voltage across each Bulb gets shared which results in less power dissipation that's why Bulbs connected in series appear dimmer as compared to when they are connected in parallel.

5 0
2 years ago
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