<span>2) The correct answer is option C i.e. The object will move if the forces are unbalanced. The objects move only on the application of unbalanced forces. 3. The correct answer is option A. i.e. net An object moves in the direction of the net force. The object moves in the direction of resultant or net force.</span>
Answer:
Mass, m = 6 kg
Explanation:
Given that,
The momentum of the object, p = 18 kg-m/s
Velocity, v = 3 m/s
We need to find the mass of an object.
The momentum of an object is given by :
p = mv
m is mass of the object
So, the mass of the object is 6 kg.
Answer:
Ionic compound
Explanation:
Barium Chloride is an ionic compound of barium and chlorine.
Barium is a metal with two valence electrons while chlorine is a non metal with seven valence electrons.
Barium will require two atoms of chlorine to form Barium chloride.
The reaction can be demonsated in the equation below.
Ba2+ + Cl- -----------> BaCl2
In this type of bond, Barium uses its 2 valence electrons to form an ionic bond with 7 valence electrons of chlorine. Chlorine will require its own two atoms to form this type of bond with Barium.
Cl -Ba-Cl = BaCl2
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Answer:
i) Jn = q Dn
ii) Diffusion current and drift current will be doubled
Explanation:
<u>i) Determine the directions of the electron drift and diffusion current flow </u>
the electron concentration is higher on the right side of the N-type semiconductor hence any change in the concentration of electrons will cause <em>diffusion of electrons from right to left and electron drift is from left to right </em>and this is because the electrons in the semiconductor bar are attracted to the electric field.
Jn = q Dn ( electron diffusion current )
<u>ii) Determine what happens to the diffusion current and drift current If we double the electron concentration everywhere </u>
The electron diffusion current ( J'n ) = 2q Dn = 2Jn ( i.e. diffusion current doubles )
Drift current = ( Jdrift = nq*μn*ε)
when the electron concentration is double
Drift current = 2 ( nq*μn*ε )
hence the drift current will double