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e-lub [12.9K]
4 years ago
8

The question is , the states of matter that have no fixed shapes are ? There has to be 3 answer

Physics
1 answer:
Basile [38]4 years ago
4 0
Liquid, gas, and plasma
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A 0.42 kg shuffleboard disk is initially at rest when a player uses a cue to increase its speed to 4.2 m/s at constant accelerat
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Answer

given,

mass of the shuffleboard disk = 0.42 kg

speed of the cue is increased to = 4.2 m/s

acceleration takes over 2 m then acceleration is zero.

the disk additionally slide to 12 m

final speed of disk = 0 m/s

a) increase in thermal energy

\Delta E_t = \dfrac{1}{2}m(v_1^2-v_2^2)

\Delta E_t = \dfrac{1}{2}\times 0.42 \times (4.2^2-v_2^2)

\Delta E_t = 3.704\ J

b)  \Delta E_t = F_f.d

F_f is the frictional force

     3.704= 12.F

      F_f = 0.308\ N

increase in thermal energy for entire movement of 14 m

     \Delta E_t = 0.308\times 14

     \Delta E_t =4.312 \ J

c)  Work done on the disk by the cue

  W = \Delta KE + \Delta E_{t}

  W = \dfrac{1}{2}\times 0.42 \times (4.2^2-0^2)+ F_f \times d

  W = 3.704+ 0.308 \times 2

   W = 3.704 + 0.616

   W  = 4.32 J

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4 years ago
A man started at his house and went to the post office, then to the pet store, and finally home again. What is the average veloc
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Answer:

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Displacement, in simple terms refers to the distance between an individual's initial position to his final position.

Man's initial position = House

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Final position = House

Hence, we can conclude that the man's Displacement is ;

Final position - Initial position = 0

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In general, it is felt that ice ages are caused by a chain reaction of positive feedbacks triggered by periodic changes in the Earth's orbit around the Sun. The last ice age ended about 12,000 years ago. The next cooling cycle would be expected to start about 30,000 years or more into the future.

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