<span>at maximum height the final velocity will be 0
using v=u+at and resolving vertically we get
v=0.6+(-9.81)t
v=0.6-9.81t
0=0.6-9.81t
9.81t=0.6
t=0.6/9.81
t=0.061 to 3sf
Now we need to resolve horizontally to find the horizontal distance
using s=ut+1/2at^2
However we now need the total time taken for the projectile travel and return to the ground. We can assume the time taken for the projectile to reach its maximum height and return to the ground is the same therefore
the total time is 2 x 0.061=0.122seconds. They'll be now horizontal acceleration in this case scenario therefore
Hence s=ut+1/2at^2
since a=0
s=ut
s=0.6 x 0.122
s=0.073m
</span>
Option 3 is the most reasonable
I hope this helped <3
Please give brainliest :)
A rader gun will determine the speed.
Answer:
a) per day
b)
c)
Explanation:
Given;
coefficient of performance of the refrigerator,
energy used per year of operation of the refrigerator,
a)
Energy used in single day:
per day
b)
Energy removed from the refrigerator in a single day:
We have the energy consumed in 1 day as,
so,
The desired effect of a refrigerator is to eliminate heat from the evaporator.
c)
Now the maximum mass of water that can freeze form 19.6°C:
where: