Patrick is repairing the roof on his house. He uses a hammer having a mass of 1 kilogram. While working at the apex of the roof,
1 answer:
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Answer:
1). Average speed = 1.5 m per second
2). Average velocity = 1.5 m per second
Explanation:
1). Since, speed is a scalar quantity
Therefore, average speed of the trip =
From the graph attached,
Total distance covered = 10 + 10 + 20 + 0 + 20 + 30
= 90 meters
Total time taken = 60 seconds
Average speed =
= 1.5 meter per second
2). Velocity is a vector quantity.
Therefore, average velocity =
=
=
= 1.5 meter per second
Answer:
(a). The decay constant is
The half life is 11.3 hr.
(b). The value of N₀ is
(c). The sample's activity is 1.87 mCi.
Explanation:
Given that,
Activity
Time
Activity R= 8 mCi
(a). We need to calculate the decay constant
Using formula of activity
Put the value into the formula
We need to calculate the half life
Using formula of half life
Put the value into the formula
(b). We need to calculate the value of N₀
Using formula of
Put the value into the formula
(c). We need to calculate the sample's activity
Using formula of activity
Put the value intyo the formula
Hence, (a). The decay constant is
The half life is 11.3 hr.
(b). The value of N₀ is
(c). The sample's activity is 1.87 mCi.