Use the definition of average acceleration:
<em>a</em> = ∆<em>v</em> / ∆<em>t</em>
We have
<em>a</em> = (8.29 m/s - 3.29 m/s) / (4.99 s)
<em>a</em> = 1.002 m/s²
Answer: 276 days
Explanation:
This problem can be solved using the Radioactive Half Life Formula:
(1)
Where:
is the final amount of the material
is the initial amount of the material
is the time elapsed
is the half life of polonium-210
Knowing this, let's substitute the values and find
from (1):
(2)
(3)
(4)
Applying natural logarithm in both sides:
(5)
(6)
Clearing
:
(7)
Answer:
Tom walked until he was 100 metres from his home. Then, he realised that he had dropped his homework, so he turned around and went 60 metres to pick it up again. He again turned back and started to walk faster to get to the bus stop on time. He got to the bus stop 100 seconds after leaving his home and waited for the bus.
Explanation:
Hey!
u=25m/s
v=15m/s
t=2s
a=?
v-u=at
15-25=a×2
-10=2a
-10/2=a
a=-5m/s^2
Hope it helps...!!!
Answer:
The value is
Explanation:
From the question we are told that
The mass is
The needed oscillation time is
Generally the spring constant is mathematically represented as

=> 
=>