Answer:
The Answer is false
Explanation:
Electromagnetic waves differ from mechanical waves in that they do not require a medium to propagate. This means that electromagnetic waves can travel not only through air and solid materials, but also through the vacuum of space.
Answer:
P(abs) = 48 KPa
Explanation:
Given that
Vacuum gauge pressure = 44 KPa
We know that Vacuum gauge pressure is also known as negative gauge pressure .
P(gauge) = - 44 KPa
Atmospheric pressure = 92 KPa
P(atm) = 92 KPa
We know that absolute pressure given as
Absolute pressure = Atmospheric pressure + Gauge pressure
Now by putting the values in the above equation
P(abs) = 92 - 44 KPa
P(abs) = 48 KPa
Therefore the absolute pressure in the chamber will be 48 kPa
Answer:
w=255
Explanation:
The change in internal energy is given by the first law:
ΔE = Q - w
where ΔE is the change in internal energy of the system
q is the heat added to the system
w is the work done *by* the system on the surroundings
So, for the first phase of this process:
ΔE = Q - w
Q=160J
w=309J
ΔE = 160J - 309J = -149J
To bring the system back to its initial state after this, the internal energy must change by +149J (the system myst gain back the 149 J of energy it lost). We are told that the system loses 106 J of heat in returning to its initial state, so the work involved is given by:
ΔE = Q - w
+149J = -106J - w
255J = -w
w = -255J
Answer:
Electrical energy
Explanation:
electrical energy Essentials. A battery is a device that stores chemical energy and converts it to electrical energy. The chemical reactions in a battery involve the flow of electrons from one material (electrode) to another, through an external circuit. The flow of electrons provides an electric current that can be used to do work.