Last Updated On 16-03-2023 - By Jeesha Sara
A heavy ball of mass M is suspended from the ceiling of a car by alight string of mass m (m<<M). When the car is at rest, the speed of transverse waves in the string is 60 ms−1. When the car has acceleration, a the waves-speed increases to 60.5ms−1, the value of a, in terms of gravitational acceleration g, is closest to :
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b. |
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Question ID - 50054 :- A heavy ball of mass M is suspended from the ceiling of a car by alight string of mass m (m<<M). When the car is at rest, the speed of transverse waves in the string is 60 ms−1. When the car has acceleration, a the waves-speed increases to 60.5ms−1, the value of a, in terms of gravitational acceleration g, is closest to :
a.
b.
c.
d.
A heavy ball of mass M is suspended from the ceiling of a car by alight string of mass m (m<<M). When the car is at rest, the speed of transverse waves in the string is 60 ms−1. When the car has acceleration, a the waves-speed increases to 60.5ms−1, the value of a, in terms of gravitational acceleration g, is closest to :
|
a. |
|
b. |
|
|
c. |
|
d. |
|
=
+
g2+a2+g2+g2
.Next Question :
A sample of radioactive material A, that has an activity of 10m Ci(l Ci=3.7
1010decays/s), has twice the number of nuclei as another sample of a different radioactive maternal B which has an activity of 20mCi. The correct choice for hall-lives of A and B an would then be respectively:
|
a. |
20 days and 5 days |
b. |
20 days and 10 days |
|
c. |
5 days and 10 days |
d. |
10days and 40days |
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