Answers:
a) 
b) 
Explanation:
a) Average velocity
is expressed by the following equation:
Where:
is Maurizio's displacement
is the time
Hence:

b) Average acceleration
is the variation of velocity
over a specified period of time
:
Where:
being
the initial velocity and
the final velocity

Then:

200 meters per minutes
500 meters -300 meters= 200 meters
300 meters -100 meters =200 meters
The formula for power is:
P = W / T (Power = Work / Time).
We have 50 Joules of work.
We have 5 seconds of time.
Let's plug in our numbers.
P = 50 / 5
Divide 50 / 5
50 / 5 = 10.
Your power is 10 Joules per second.
I hope this helps!
Jack Kilby invented the circuit
Answer:
7.77 x 10⁸ Km
Explanation:
given,
Speed of light = 3 x 10⁵ Km/s
= 3 x 10⁸ m/s
1 light hour = 1.079 x 10⁹ Km
now,
0.72 light hour = 0.72 x 1.079 x 10⁹ Km
= 0.7769 x 10⁹ Km
= 7.77 x 10⁸ Km
The Jupiter is 7.77 x 10⁸ Km far from sun.