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Bess [88]
3 years ago
11

Can you please answer this question?

Physics
1 answer:
Sidana [21]3 years ago
5 0
I think its b too but i may be wrong
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An observer measures the length (L), width (w), and height (h) of a box while stationary relative to the box. The observer then
Elenna [48]

Answer:

b. less than w.

Explanation:

In this question, the application of length contraction is what helps us come to our conclusion. When an object moves very fast (relative to the observer), the length of the object seems to be smaller than it actually is (again, for the observer).

This is supported by the length contraction equation below:

L = L_0\sqrt{1-\frac{v^2}{c^2} }

Here, L is the observed length

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v is the relative speed between the object and the observer

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3 years ago
Which of the following statements is true regarding the use of refrigerants?
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B.

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3 years ago
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A 81 kg block is released at a 3.8 m height. the track is frictionless. the block travels down the track, hits a massless spring
Alenkinab [10]
Since the track is friction less, block’s kinetic energy at the bottom of the track is equal to its potential energy at the top of the track. 
PE = 81 * 9.8 * 3.8 = 3016.44 J
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PE = Kinetic energy at the base.
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In one sentence describe how the electricity in an action potential is generated
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Due to influx of potassium ions, electricity is generated in axon of a neuron.  

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Axon membrane is the semi permeable membrane that is full of potassium and sodium channels. There’s also Sodium Potassium ATPase pumps. When there’s an impulse coming through the synapse, the potassium channels open. This leads to influx of sodium from outside the membrane to inside it. Then the membrane becomes positive.

Then the electricity is generated and its conducted from one part to another. After the impulse is conducted, the sodium potassium pumps come in action which transports 3 sodium inside and 2 potassium outside in consumption to an ATP.  

8 0
2 years ago
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