Answer:
Driving test
Explanation:
Usually according to laws in countries worldwide, to be licenced to drive, one is required to go through a driving school to learn the ethics and rules of driving.
Answer:
conditional instability (Γd > Γe > Γw)
Explanation:
Given;
dry adiabatic rate, Γd = 10ºC/1000 meters
wet adiabatic rate, Γw= 6.5ºC/1000 meters
environmental lapse rate, Γe = 7.8ºC/1000 meters
Stability of the atmosphere can be described as Absolute stability, Absolute instability or conditional instability.
Conditions for Absolute stability:
Γd > Γw > Γe
Conditions for Absolute instability:
Γe > Γd > Γw
Conditions for conditional instability:
Γd > Γe > Γw
Thus, conditional instability satisfies the given values of the atmospheric condition: Γd (10) > Γe (7.8) > Γw (6.5)
Answer:
21.456 kJ/h
Explanation:
See the figure attached. In this case


Coefficient of performance in heat pump is defined by




Now it is necessary to change units, remember that Watt (W) is defined as J/s


Answer:
Isn't the answer written upside down in the sentence?
Explanation:
Answer:
A. N type impurities
B. P type impurities
Explanation:
A. The impurities contribute free electrons and changing the conducting property of the semi conductor. When a pentavalent impurities in a semi conductor( impurities with five valence electron) , the impurity atom replace some of the semi conductor atoms in the crystal structure where 4 of the valence electron would be involved in bonding of 4 neighbouring semiconductor while leaving the fifth electron to be free(negative charge carrier) which is available for detachment.
B. When a trivalence impurity is added to semiconductor, instead of excess electron, there will be excess hole created by crystals. Reason for this attribute is the trivalence atom will replace some tetra valence semiconductor atom, when three valence electrons of the 3 valence electrons of the trivalent impurity atom make bond with three neighbouring semiconductor which gives rise to lack of electron in the bond of the fourth neighbouring semiconductor which contribute a whole to the crystalline since trivalent impurity contribute excess holes to the crystal of semi conductor, this holes can accept electrons.