A hiker climbs to the top of a mountain at rate of 0.5 m/hr. The speed of hiker is 1.3 x 10⁻⁴ m/s and the velocity of the hiker is 1.3 x 10⁻⁴ m/s west.
Speed is a scalar quantity. It is used to measure the distance traveled in a period of time. It is represented by -
s = d/Δt
where,
s = speed
d = distance
Δt = change in time
Velocity is a vector quantity. It is used to measure the change in position, that is, displacement over the change in time. It is represented by -
v = Δs / Δt
where,
v = velocity
Δs = change in position/displacement
Δt = change in time
The standard unit of velocity and speed both is m/s.
To learn more about speed and velocity,
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Answer:
C.
Explanation:
Phase change is physical.
Answer: 186.3 g of 
will be produced from 2.50 mol of K
Explanation:
The balanced chemical reaction is:
According to stoichiometry :
2 moles of K produce = 2 moles of
Thus 2.50 moles of 
will produce=
of
Mass of 
Thus 186.3 g of will be produced from 2.50 mol of K
Answer:
The neutral atom chlorine (Z=17), for instance has 17 electrons. Therefore, its ground state electronic configuration can be written as 1s 22s 22p 63s 23p 5. The chloride ion (Cl -), on the other hand, has an additional electron for a total of 18 electrons.
cannot be cut into smaller pieces
