<span>Ik it has something to do with not always being able to be used. Example: Goes dark at night therefore no sunlight some people say a but i would say d but the person that said it was a was not very trustable so yea i would go with D hope this helped:)</span>
They use sound waves that bounce off walls, and other things back to them to feel where they are going.
If you mean with the visible eye, then its radiation. we cant see radiation.
get a little more detail about the question.
Answer:
changes in thermal energy
Explanation:
A calorimeter is usually filled with water. Then, a hot material is placed in the water: the material transfer heat to the water, which is initially colder, until they have the same temperature (thermal equilibrium). By measuring the change in temperature of the water inside the calorimeter, it is possible to calculate the change in thermal energy (which is equal to the heat released by the material). In fact, the heat absorbed by the water is equal to the heat released by the material:
where
is the mass of the water
is the specific heat of the water
is the temperature change of the water
is the mass of the material
is the specific heat of the material
is the temperature change of the material
By knowing the mass of the water, its specific heat and by measuring the temperature change of the water, one can calculate the change in thermal energy.
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>