Answer:
a) , b)
Explanation:
a) The package handling system is modelled by using the Principle of Energy Conservation and the Work-Energy Theorem:
The final kinetic energy is:
The final speed is:
b) The maximum speed of the box during its motion occurs at the beginning of the movement, since the work done by friction is non-conservative and reduces speed as box travels on the horizontal surface. Hence, the maximum velocity is:
Answer: 184,615,384.6 years
Explanation:
This problem can be solve by the following equation:
(1)
Where:
is the spreading rate of the seafloor, its velocity
is the distance the Africa's west coast moved at this rate
is the time it took to the coast to move the descibed distance
Isolating from (1):
(2)
(3)
Finally:
This is the time it took to the Africa's west coastto move away from the Mid atlantic ridge.
Energy from minerals to heat energy which will later be used for fuel/electricity
The total distance traveled in km is 86.4 km
From the question,
We are to determine the total distance traveled in km.
First, we will determine the distance traveled in m.
Distance traveled can be calculated using the formula
Distance = Speed × Tim
From the given information,
Speed = 30.0 m/s
Time = 0.8 hr = 0.8 × 60 × 60 s
Time = 2880 s
Putting the parameters into the formula, we get
Distance = 30.0 × 2880
Distance = 86400 m
Now, we will convert from meters (m) to kilometers (km)
NOTE: 1000 m = 1km
If 1000 m = 1km
Then, converting 86400 m into km = 86400/1000 = 86.4 km
Hence, the total distance traveled in km is 86.4 km
Learn more on calculating distance please click on the link: brainly.com/question/11934786
#SPJ9