7. A particle is forced to move in a straight line path. It returns to the starting point after 10 s. The total distance covered
1 answer:
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Answer:
The time is 5.71 sec.
Explanation:
Given that,
Acceleration
Initial velocity = 24.0 m/s
We need to calculate the time
Using equation of motion
v = u+at[/tex]
Where, v = final velocity
u = inital velocity
t = time
a = acceleration
Put the value into the formula
Hence, The time is 5.71 sec.
Answer:
The correct answer is "53.15 days".
Explanation:
Given that:
Half life of ,
- Let the initial activity be "
".
- and, activity to time t be "R".
To find t when R will be "1%" of , then
⇒
As we know,
⇒
or,
∴
By putting the values, we get
We know that,
Decay constant,
hence,
⇒