Answer:
Some types of electromagnetic waves, like radio waves, microwaves, infrared waves, visible light and ultraviolet waves, can be reflectedSome types of electromagnetic waves, like radio waves, microwaves, infrared waves, visible light and ultraviolet waves, can be reflected
Explanation:
Answer:
lubricant (decrease friction).
control production speed.
use only when required.
To solve this exercise it is necessary to apply the equations concerning Work, both by general definition and by conservation of energy.
In other words, the work done by an object due to gravity is the equivalent to that defined by the potential energy equations, that is
Where,
m=mass
g=gravitational acceleration
Change in height
On the other hand we have that the work done by tension is defined by the conservation of kinetic and potential energy, that is to say
Where,
Change in Kinetic Energy
Change in Potential Energy
PART A) As defined by the work done by gravity would be given by,
Therefore the work done by gravity is 25.725kJ
PART B) The work done by the tension applies the energy conservation equation, that is to say
Replacing with our values,
Therefore the work done by tension is 25.9kJ
Answer:
Explanation:
while it is still falling it is turned into kinetic energy. While on the floor it turns onto potential energy. Remember energy cannot be created or the destroyed so the other ones are automatically out.
Answer:
The percentage change in the hypothetical time is 10.53%
Explanation:
Percentage change in a quantity is given by;
* 100%
In this case, the quantity in question is time.
Therefore, percentage change in time =
* 100%
<em>where;</em>
Final time = 42minutes
Initial time = 38minutes
Substituting these values into the equation above gives;
=> * 100%
=> * 100%
=> 10.53%
<em>Hope this helps!</em>