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photoshop1234 [79]
3 years ago
8

1.which energy is stored in chemical compounds and released in chemical reactions

Physics
2 answers:
kari74 [83]3 years ago
4 0
1.) Chemical energy

2.) Kinetic energy
sveta [45]3 years ago
3 0

Answer:

  1. a. chemical energy
  2. b. kinetic energy

Explanation:

1)

When chemical bonds are made a work is done in forming them. That work is stored inside the bonds as energy. This energy is called chemical potential energy or simply chemical energy

The chemical energy is released as mostly thermal energy and light energy during chemical reactions

2)

Energy of an object as a result of its motion is called kinetic energy.

If the object of mass 'm' is moving with a velocity 'v', then its kinetic energy

E = \frac{1}{2}mv^2

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two identical eggs are dropped from the same height. The first eggs lands on a dish and breaks, while the second lands on a pill
Nataly_w [17]

Answer:

The height is the same

Explanation:

Because they were at the same height but they fell at different velocities

5 0
3 years ago
1.Which car has zero acceleration?<br><br>2. which car is decelerating? ​
Ivanshal [37]

Answer:

1. B has no acceleration because the straight line shows that it's a constant speed not speeding up or down.

2. A because you can see the decline in speed as time goes on

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2 years ago
In which century was the DNA database established?
krok68 [10]
DNA database was established in 1995
8 0
3 years ago
You throw a rock up into the air as hard as you can. It stays in the air a total of 6.0 s. What
vaieri [72.5K]

Answer:

<h2>5.9 x 10</h2>

Explanation:

6 0
3 years ago
A piston of volume 0.1 m3 contains two moles of a monatomic ideal gas at 300K. If it undergoes an isothermal process and expands
seropon [69]

Answer:

the work is done by the gas on the environment -is W= - 3534.94 J (since the initial pressure is lower than the atmospheric pressure , it needs external work to expand)

Explanation:

assuming ideal gas behaviour of the gas , the equation for ideal gas is

P*V=n*R*T

where

P = absolute pressure

V= volume

T= absolute temperature

n= number of moles of gas

R= ideal gas constant = 8.314 J/mol K

P=n*R*T/V

the work that is done by the gas is calculated through

W=∫pdV=  ∫ (n*R*T/V) dV

for an isothermal process T=constant and since the piston is closed vessel also n=constant during the process then denoting 1 and 2 for initial and final state respectively:

W=∫pdV=  ∫ (n*R*T/V) dV =  n*R*T  ∫(1/V) dV = n*R*T * ln (V₂/V₁)

since

P₁=n*R*T/V₁

P₂=n*R*T/V₂

dividing both equations

V₂/V₁ = P₁/P₂

W= n*R*T * ln (V₂/V₁)  = n*R*T * ln (P₁/P₂ )

replacing values

P₁=n*R*T/V₁ = 2 moles* 8.314 J/mol K* 300K / 0.1 m3= 49884 Pa

since P₂ = 1 atm = 101325 Pa

W= n*R*T * ln (P₁/P₂ ) = 2 mol * 8.314 J/mol K * 300K * (49884 Pa/101325 Pa) = -3534.94 J

5 0
3 years ago
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