Answer:
Sodium is stored under paraffin oil
Explanation:
Group 1 metals are known to be very highly reactive. The chemical reactivity of the members of the group decreases down the group.
Sodium reacts violently with water and upon exposure to the atmosphere. As a result of this, it must be stored under paraffin oil.
Answer:
Part a)
Part 2)
Part 3)
Explanation:
Part 1)
As we know that electric field and potential difference related to each other as
so we will have
so we have
Part 2)
Charge of an electron
now force is given as
Part 3)
Work done to move the electron
<span>Centripetal
force is easily calculated as long as you know the mass, </span>m, of the object; its distance, r, from the center; and the tangential velocity, v. This equation is based on the metric system; note that the
centripetal force, f, is measured in Newtons.
F = mv^2 / r
19 N = m ( 0.54^2) / ( 0.36)
Solve for m
<span>M = 23.5 kg</span>
Answer:
2
yes
Explanation:
been submitted to the Theme 20 participants will be there was a lot of fun and I will be there at Home
This information could be used in the following ways: the braking distance of a skidding car will depend on its initial speed and the coefficient of kinetic friction.
Thus, if the coefficient of friction is known the initial speed can be determined from the length of the skid marks.
What do you mean by Initial speed?
Initial speed can be described as how fast an object travels when gravity first applies force on the object. It can be represented in the form of (u) and is generally measured in metres per second (m/s).
It can be represented in three ways.
- v2=u2+2as
- v=u+at
- s=ut+0.5at2
Through these formulas we can calculate the initial speed of any object. It helps in understanding various velocities, time principles.
To know more about initial speed from the given link
brainly.com/question/26116359
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