The object must move with the speed of 
times to approximately seeing that it is contracted to exactly half of its actual length.
<h3>How is this calculated?</h3>
The length contraction experimented by the object as it approaches lightspeed, in meters per second, is described by Lorentz contraction formula:
Here, v is the current speed m/s
c is the speed of light in m/s
L' is the length of the object at rest in m
L is the length of the object at the current speed in m
Now we know that
and 
then,
Hence, r = 
Therefore, the answer is the object must travel at a speed of times the lightspeed to be contracted to one-half its proper length.
To know more about the Lorentz contraction formula, visit:
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Cognitive-behavioral therapy are aimed at reducing distorted cognition and information processing biases associated with GAD, as well as reducing catastrophizing about minor events.
<h3>What is meant by Cognitive-behavioral therapy?</h3>
This is the type of therapy that may help people to manage the way they think and do things through the use of a speech therapy.
This type of therapy is very useful for the treatment of anxiety disorder in patients.
Read more on Cognitive-behavioral therapy here: brainly.com/question/7773389
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D. Air pollution is not as much of a problem there
If a government or other authority declares a state of emergency in an area, it introduces special measures such as increased powers for the police or army, usually because of civil disorder or because of a natural disaster such as an earthquake.
