They have a charge of zero because every atom starts of with the same number of electrons (which are negative) and protons(which are positive.)
These happens in till bonding happens, but the bond itself is zero. Zero just means that the bond has the same amount of positive and negative.
Answer:
≈ 6.68 m/s
Explanation:
A suitable formula is ...
vf^2 -vi^2 = 2ad
where vi and vf are the initial and final velocities, a is the acceleration, and d is the distance covered.
We note that if the initial launch direction is upward, the velocity of the ball when it comes back to its initial position is the same speed, but in the downward direction. Hence the problem is no different than if the ball were initially launched downward.
Then ...
vf = √(2ad +vi^2) = √(2·9.8 m/s^2·1.0 m+(5 m/s)^2) = √44.6 m/s
vf ≈ 6.68 m/s
The ball hits the ground with a speed of about 6.68 meters per second.
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We assume the launch direction is either up or down.
Answer:
energy is free or can be bought
Explanation:
Its true
Answer:
B. a super-giant in spectral class K
Explanation:
The classification of stars are done on various characteristics like surface temperature, luminosity, spectral class etc. HR diagram is a plot which shows the relation between these characteristics of stars. One can also predict the life cycle of stars. When you plot the stars basis these characteristics on HR Diagram you can easily see that the stars with temperature lower than 4000K and brightness several thousand of that of the Sun will be a supergiant star.
The answer is a because tjhey do move at a molecular movemn