Answer: Please see below
Explanation:
Are pure substances that cannot be broken down into a simpler form---- Element
are units of two or more atoms---- Molecule
are the smallest possible particles of an element---- an Atom
are pure substances made of two or more atoms of different elements---- Compound
An atom is the smallest unit of matter that consists of protons, neutrons and electrons. Eg the element, helium, contains atoms with two protons in the nucleus.
Eg of element, we have carbon, hydrogen, helium
Eg of a compound--- Ammonia
Eg of a molecule-----H2O (water),C6H12O6 (glucose)
<span>Answer: b. air pressure
</span>The weather station model purpose is giving information about the weather. The information including the temperature, the air pressure, the direction of the wind and other things. The air pressure will be detected using a barometer.
The weather station doesn't give altitude/latitude or air mass.
Answer:
so angular velocity is 7.13128 sec−1
Explanation:
velocity v = 2.2 m/s
displacement s = 220 mm = 0.220 m
distance d = 510 mm = 0.510 m
to find out
angular velocity
solution
we know that
angular velocity will be velocity ( v) / (displacement² + distance²) .....1
now put all these value in equation 1 and we get angular velocity i.e.
angular velocity = velocity ( v) / (displacement² + distance²)
angular velocity = 2.2 / (0.22² + 0.51²)
angular velocity = 2.2 / 0.3085
angular velocity = 7.13128
so angular velocity is 7.13128 sec−1
Answer:
Part c)
Explanation:
Part a)
As per Coulomb's law we know that force on a charge placed in electrostatic field is given as
now acceleration of charge is given as
now if charge moved through the distance D in electric field and its speed changes from vo to fraction f of speed of light c
then we will have
so we have
Part b)
Now using work energy theorem we can say that total work done by electric force on moving charge will convert into kinetic energy
So we will have
so we have
Part c)
Now if an electron is accelerated using this field
then we have
so we have