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olya-2409 [2.1K]
2 years ago
6

Which in is it Speed (S) or Velocity (V)?

Physics
1 answer:
Andrej [43]2 years ago
8 0

Explanation:

Speed has only magnitude.

Velocity has magnitude and direction.

"A bike goes 25 m/s toward  main street."

This includes a direction, so it is velocity (V).

"A person walks 4 mph."

This has only magnitude, so it is speed (S).

"A plane flies 200 m/s."

This has only magnitude, so it is speed (S).

"A bird flies 100 mph due south."

This includes a direction, so it is velocity (V).

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To make ice, a freezer that is a reverse Carnot engine extracts 37 kJ as heat at -17°C during each cycle, with coefficient of pe
Dvinal [7]

Answer:

a) 6.4 kJ

b) 43.4 kJ

Explanation:

a)

Q_{a} = Heat absorbed = 37 kJ

β  = Coefficient of performance = 5.8

W = Work done

Heat absorbed is given as

Q_{a} = β W

37 = (5.8) W

W = 6.4 kJ

b)

Q  = work per cycle required

Q  = Q_{a} + W

Q  = 37 + 6.4

Q  = 43.4 kJ

5 0
3 years ago
Which statement about gravitational attraction is correct?
natita [175]
It’s b all objects with mass experience gravitational attraction I hope this helps
3 0
2 years ago
Earthquakes usually happen at: - folds - mountains - fault lines
anastassius [24]

Answer:

Fault lines

Explanation:

8 0
2 years ago
Which of the following statements best describes the method of energy conservation known as cogeneration?
Mazyrski [523]

Answer:

heat and power

Explanation:

is the simultaneous production of electricity and heat both of which are used

6 0
2 years ago
What tools enable people to connect and exchange ideas
aleksklad [387]

Answer:

The answer is: "Social Media tools"

Explanation:

"Social Media tools" are <u>very popular tools being used by the modern generation these days.</u> They come in different types according to their usage (Listening Platforms, Publishing Platforms and Competitive Analysis Platforms). Examples of these are: <em>Hootsuite, Buffer, Oktopost, Canva, Google Trends, BuzzSumo, etc.</em>

These tools allow people to interact with one another. People can published the information they want to share and distribute this information to other people. Marketers also use these tools in order to aid them regarding online businesses and the like. Some social media tools are available for free while others have to be purchased.

Thus, this explains the answer.

5 0
3 years ago
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