When the air density is 0 kg/m°(vacuum), how long will it take an object to reach terminal velocity?

Physics

1 answer:

Drupady [299]3 years ago

3 0

Answer:

d. The object never reaches terminal velocity.

Explanation:

Terminal velocity is the velocity a falling object reaches when the air resistance equals the weight. But in a vacuum, there is no air resistance. So the object never reaches terminal velocity.

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1. A car is traveling at 36 m/s hits a tree and comes to rest in 0.05 seconds.

QveST [7]

Answer: a. -720m/s^2

b. Yes, airbags will deploy

Explanation:

The formula for acceleration is:

= (Final velocity - Initial velocity)/Time

Final velocity = 0m/s

Initial velocity = 36m/s

Time taken = 0.05s

= (Final velocity - Initial velocity)/Time

= (0 - 36)/0.05

= -36/0.05

= -720m/s^2.

Since it's negative, it shows that there was a deceleration.

2. Yes the airbag will deploy since the acceleration gotten is more than -600 m/s^2.

3 0

4 years ago

Look at the diagram. Emily needs to complete the circuit. What two points should be connected to complete the circuit and make t

pogonyaev

Answer:

The points 2 and 4 should be connected.

Explanation:

To complete the circuit, we need to connect the two points which when connected, encompass the battery and the bulb in the circuit. The points 2 and 4 do the job, since they connect the terminal of the battery and the terminal of the bulb, and thus complete the circuit.

Therefore, the choice C is correct.