A company records authors reading their books aloud. These recordings are shared with libraries around the world for people to l
isten to. The company recently changed to using digital recordings. Which two reasons may explain why the company no longer uses an analog signal for its recordings?
A. The analog signal uses only two values.
B. The analog signal cannot be sent long distances.
C. The analog signal is more likely to be affected by noise.
D. The analog signal will lose quality when it is copied many times.
A. The analog signal uses only two values.
B. The analog signal cannot be sent long distances.
C. The analog signal is more likely to be affected by noise.
D. The analog signal will lose quality when it is copied many times.
2 answers:
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Answer:
(a) = 4.19 x
N, and its direction is towards
.
(b) It must be placed inside a hollow shell.
Explanation:
Let, = 165 kg,
= 465 kg,
= 60 kg, and the distance between
and
is 0.340 m.
(a) Since is placed midway between
and
, then its distance to both masses is 0.170 m.
From the Newton's law of universal gravitation,
F =
Where all variables have their usual meaning.
Then,
a. =
-
=
= 2.25 x N
=
= 6.44 x N
∴ = = 6.44 x
- 2.25 x
= 4.19 x N
The net force exerted by the two masses on the 60 kg object is 4.19 x N.
(ii) // = /
/ - /
/
= 6.44 x - 2.25 x
= 4.19 x N
(iii) The direction of the net force is to the right i.e towards .
(b) For the net force experienced by the 60 kg object to be zero, it must be placed inside a hollow shell.