Answer:
The inner and outer surfaces of a 0.5-cm thick 2-m by 2-m window glass in winter are 10°C and 3°C, respectively. If the thermal conductivity of the glass
Explanation:
Answer =7,142.9W
I hope this helps (:
Answer:
From the poem Black woman what does it mean by Savannah stretching to clear horizons, Savannah shuddering beneath the East wind's eager caresses.
Explanation:
Consider that I'm an italian student so I may unproperly use some terms.
Being Ug (Potential energy on earth) = m·g·h
Where "m" in this case is the mass of the ball, "g" the average value of gravitation constant on Earth's surface and "h" the height reached by the ball.
The solution to the first question would be : Ug = mgh = 40[kg] · 10 [m/s²] · 5[m] = 2000 [Joule]
In order to find the value of its K (kinetic energy) and without considering air resistance, you can use the concept of mechanical conservation of energy that confirms : U(start) + K(start) = U(final) + K(final).
So since you want to find its K(final) you can isolate it in the law and it gives you:
K(final) = U(start) + K(start) - U(final)
Consider that in halfway fall its Ug(final) value is mgh = 40[kg] · 10[m/s²] · 2.5[m] = 1000[Joule]
Now you just need to change these elements into their values(consider that K(start) is 0:
K(final) = 2000[Joule] + 0[Joule] - 1000[Joule] = 1000[J]
Hope I explained it well.
Answer: Ionization energy is the amount of energy necessary to <u>remove an electron from an atom</u>
Explanation:
Ionization consists of the production of ions, which are electrically charged atoms or molecules due to the excess or lack of electrons with respect to a neutral atom or molecule.
In this sense, ionization energy is the <u>energy necessary to separate (remove) an electron from a gaseous atom</u>, isolated and in a fundamental state. This is because <u>electrons are strongly attracted to the nucleus and it is necessary to provide energy to separate them</u>. However, where the atom always loses electrons is in the last layer, which is where the weakest electrons are attracted to the nucleus.