Answer:
v_average = 15 m / s
Explanation:
The average speed can be found in two ways,
* taking the distance traveled and divide it by the time spent
* taking the velocities in each time interval and then finding the weighted average by the time fraction
v_average = 1 / t_total ∑ 
vi ti
Let's apply this last equation
Total time is
t = t₁ + t₂
t = 10 + 10 = 20 min
v_average = 10/20 10 + 10/20 20
v_average = 10/2 + 20/2
v_average = 15 m / s
A decagram is 1000 times bigger than a centigram
A solid has a definite meaning that there is only one shape there can be meaning a solid has a definite volume
Answer:
A.C. Generator
Explanation:
The device designed to convert chemical energy into kinetic energy is an A.C generator.
The generator uses fuel to cause the mechanical motion of the pistons in the device.
- Chemical energy is a form of energy found between the bonds of compounds and molecules.
- When the bonds are broken, energy is released.
- The heat energy produced drives pistons and cause mechanical motion of the body.
- This is a form of kinetic energy which causes the motion of a body.
