Answer:
With the given information, we can assume that the start and the end of the trip are the same place. (Suppose, a tour where the bus starts at the school, then it goes to a given location, and then it returns to the school)
Now, the definition of displacement is:
The difference between the final position and the initial position.
But if the start and the end of the trip are the same place, then the initial and final position must be the same. Then the difference between the final position and the initial position is zero.
This means that the displacement of the school bus from the start to the end of its trip must be zero.
Answer:
PEg or PE = gravitational potential energy
m = mass of an object
g = acceleration due to gravity
h = height of the object
Explanation:
5m
The statement about "<span>A wedge is simply a form of an inclined plane" is false. </span><span>The pivot joint
is the lever and the wedge are the blades of the scissors. This is to
efficiently exert force on an object to cut it.</span>
Answer:
43 revolutions.
Explanation:
The time it takes for the car to stop is
The distance it travels in that time is
The number of revolutions that the tires make is then
<em>The last calculation just asks the question "how many tire circumferences fit into d=113 meters?"</em>
Answer:
About 2 units.
Explanation:
We assume that there is no heat dissipating instrument in the room
Total cooling load of the room is defined from the given below equation
=++
where
= 10*100 W =1 KW
= 40*360 KJ/h= 4 KW
=15000KJ/h= 4.17 KW
= 1+4+4.17=9.17 KW
the number of air conditioner unit is ==1.83
which is approximately 2 units