Complete Question
Two substances are identical except that the electron mean free time for substance A is twice the electron mean free time for substance B. If the same electric field exists in both substances the electron drift speed in A is:
Select one:
a. half that in B
b. four times that in B
c. twice that in B
d. the same as in B
e. one fourth that in B
Answer:
Option c is correct
Explanation:
From the question given
The electron mean free time substance for substance is
The electron mean free time substance for substance B is
Generally the drift velocity for substance A is mathematically represented as
Generally the drift velocity for substance B is mathematically represented as
So
=>
Answer.
To calculate the average atomic mass , multiply the fraction by the mass number for each isotope , then add them together
_PCi5 + _H20 + _H3PO4 _HCI<br>
A.) 1,3,1,5<br>
B.) 2,4,1,5<br>
C.) 1,4,1,5<br>
D.) 2,1,2,5
Ann [662]
Answer:
C
Explanation:
because of the kids are doing well and staying in the middle of the day early to get a new phone number for home now deep
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Answer:
4.29 millimeters
Explanation:
Bats emit ultrasound waves: in air, ultrasound waves travel at a speed of
The frequency of the waves emitted by this bat is:
Therefore we can find the wavelength of the wave emitted by the bat by using the relationship between speed, frequency and wavelength: