The third choice best describes reliability: <span>Editorial blogs are considered an unreliable source because the author may not have a science background.
The first statement is illogical, just because the public can access information does not make it unreliable. The second also is incorrect, if charities receive money from the public, they may have incentive to publish popular theories to get more support, so they are unreliable. The fourth is incorrect, because we don't have any background on who the authors are.
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The author s feeling about a subject or topic, which is evidenced in word choice, is called tone.
Answer:
1.379 m/s2
Explanation:
F=ma
There is a negative force from the elevator...
F = (715 kg) (-9.81 m/s2)
F = -7014.15 N
Cable + elevator = 8000 N + (-7014.15 N)
F = 985.85 N
a = F/m
985.85 N/715 kg = 1.379 m/s2
Answer:
Force = 4N
Explanation:
Workdone = force × distance
Force = Workdone/distance
Force =160/40 = 4N
Answer:
The star is moving toward us
Explanation:
The wavelength of a distant object changes due to the change in the distance between the observer and the object. This is known as the Doppler effect.
If the wavelength decreases this means that the wavelength in going towards blue which is shorter wavelength. This is known as blue shift. If blue shift occurs then it means that the object is coming closer to the observer.
Hence, the star described here has blue shifted and is moving closer to us.