Two point charge
1 answer:
You might be interested in
Answer:
The slope of a position-time graph can be calculated as:
where
is the increment in the y-variable
is the increment in the x-variable
We can verify that the slope of this graph is actually equal to the velocity. In fact:
corresponds to the change in position, so it is the displacement,
corresponds to the change in time
, so the time interval
Therefore the slope of the graph is equal to
which corresponds to the definition of velocity.
Answer:
The answer is below
Explanation:
a) Given that the modulus of elasticity (E) = 317 GPa, to find the modulus of elasticity (in GPa) for the nonporous material (), we use the formula:
b) If the porosity P = 11.1%, then the modulus of elasticity is:
Answer:
12432 cal.
Explanation:
The process to change ice at -32 ºC to steam at 182 ºC can be divided into 5 steps:
1. Heat the ice to 0 ºC, which is the fusion temperature.
2. Melt the ice (obtaining liquid water), which is a process at constant pressure and temperature, so the liquid obtained is also at 0ºC.
3. Heat the liquid water from 0 ºC to 100 ºC, which is the vaporization normal temperature of the water.
4. Vaporization of all the water; this is also a process that occurs at constant pressure and temperature, so the produced steam will be at 100ºC.
5. Heat the steam from 100 ºC to 182 ºC.
Each process has a required energy, and the sum of the energy required for each and all of the steps is the total amount of energy required for the whole process:
is a heating process for the ice, so we know that the energy required is proportional to the temperature difference through the specific heat:
is a phase change process, so we do not use the specific heat (sensible heat), but the fusion heat (latent heat), so:
Analogously,
Finally, the total energy required is: