What does the statement "all motion is relative" mean?

1 answer:

4 0

The statement that motion is relative is an important concept in physics. The meaning behind this statement is that the motion of an object is relative to either the frame of reference of the observer, or to another distinct frame of reference.

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Relate the output of energy from a heat engine to the energy put into the heat engine considering the second law of thermodynami

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Answer:

Considering the II law of thermodynamics

From the figure

Out put of energy:

Heat supplied from the source/ reservoir (Q₁) - Heat rejected to the surroundings from the system (Q) = Q₁ - Q₂. Also known as Net work done on the system.

Input of energy:

Amount of heat energy supplied to the system from the source (Q₁ ).

Efficiency (H.E) = η = Output÷ Input

η = (Q₁ - Q₂) ÷ Q₁

OR η = Wnet ÷ Q₁ ; since Wnet = (Q₁ - Q₂)

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Which perspective believes that behavior is learned through rewards and punishments

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Behaviorism is the aspect of psychology that believes that behavior is learned through rewards and consequences. There have been many scientific studies conducted on this idea.

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3 years ago

While camping in Denali National Park in Alaska, a wise camper hangs his pack of food from a rope tied between two trees, to kee

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The tension in each of the ropes is 625 N.

Draw a free body diagram for the bag of food as shown in the attached diagram. Since the bag hangs from the midpoint of the rope, the rope makes equal angles θ with the horizontal. The tensions T in both the ropes are also equal.

Resolve the tension T in the ropes into horizontal and vertical components T cosθ and T sinθ respectively, as shown in the figure. At equilibrium,

$2T sin\theta = 50 N$ ......(1)