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svetlana [45]
3 years ago
8

Which of the following represents a virtual image? ​

Physics
1 answer:
Sauron [17]3 years ago
7 0

Answer:

A

Explanation:

A virtual image is on the same side as the object, which by convention is drawn on the left side.  So -di would represent a virtual image.

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The magnitude of the force associated with the gravitational field is constant and has a value F. A particle is launched from po
Goryan [66]

Answer:

Energy gained by the second particle = 12Uo

Explanation:

Given Data;

Resistant force = 12F

Initial kinetic energy = Uo

Calculating the kinetic energy gained, we have;

u = f *r

where f= resistant force = 20F

r = initial kinetic energy = Uo

Therefore,

U = 12 * uo

  = 12 Uo

Therefore, energy gained by the second particle = 12Uo

4 0
4 years ago
A reaction has a rate constant of 0.0117 s-1 at 400.0 k and 0.689 s-1 at 450.0 k. calculate the activation energy in kilojoules
Zina [86]
By definition we have to:
 LOG (k2 / k1)=(-Ea/R)*(1/T1-1/T2)
 Where,
 k1 = 0.0117 s-1
 K2 = 0.689 s-1
 T1 = 400.0 k
 T2 = 450.0 k
 R is the ideal gas constant
 R = 8.314 KJ / (Kmol * K)
 Substituting
 ln (0.0117/0.689)=-Ea/(8.314)*((1/400)-(1/450))
 Clearing Ea:
 Ea = 122 kJ
 answer
<span> the activation energy in kilojoules for this reaction is
</span> Ea = 122 kJ
<span>
</span>
7 0
3 years ago
Read 2 more answers
The voyage of the H.M.S what important because
yaroslaw [1]

C. Physicalist chemist and biologist conducted experience in gather collection that changed existing scientific knowledge about the oceans

Explanation:

The voyage of Her Majesty's Ship was highly important because it furnished scientists with rich evidence about a lot of phenomenon under study and this changed existing scientific knowledge about the ocean.

  • H.M.S II was an expedition to study and map the ocean floor using some sophisticated and newer devices.
  • It was through this expedition that the theory of plate tectonics was modified and became a theory
  • The bathymetry of the ocean floor was also carried out.
  • The mid-oceanic ridge was discovered through the expedition.
  • Some rare species of organisms were also obtained from the ocean floor in this process.
  • The H.M.S second expedition after the world war was very crucial and helped furthered scientific knowledge about the oceans.

learn more:

Sea floor spreading brainly.com/question/9912731

#learnwithBrainly

7 0
3 years ago
Which of the following is not physically possible?
nikklg [1K]

Answer:

  (a)  -550 °F

Explanation:

No temperature below absolute zero is possible.

Absolute zero on the Fahrenheit scale is -459.67 °F. A temperature of -550 °F is less than that, so is not physically possible.

6 0
2 years ago
Please help me, this school work is not the easiest for me.
lidiya [134]

Answer:

A = mm2

M = km2

F = mg

Explanation:

7 0
3 years ago
Read 2 more answers
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