30 grams of radioactive isotope have passed.
<u>Answer:</u>
<em>Thunderbird is 995.157 meters behind the Mercedes</em>
<u>Explanation:</u>
It is given that all the cars were moving at a speed of 71 m/s when the driver of Thunderbird decided to take a pit stop and slows down for 250 m. She spent 5 seconds in the pit stop.
Here final velocity 
initial velocity
distance
Distance covered in the slowing down phase = 







The car is in the pit stop for 5s 
After restart it accelerates for 350 m to reach the earlier velocity 71 m/s





total time= 
Distance covered by the Mercedes Benz during this time is given by 
Distance covered by the Thunderbird during this time=
Difference between distance covered by the Mercedes and Thunderbird
= 
Thus the Mercedes is 995.157 m ahead of the Thunderbird.
Answer:
a fish cannot be killed by throwing an arrow into the water because you have to throw the arrow at the fish not just in the water….
Explanation:
common sense TwT
duhhh
Answer:
400 J
Explanation:
The efficiency of a machine is defined as

where
is the work output
is the work input
For this machine, we know the following
is the work in input
is the efficiency
Solving for the work output, we find
