A football player running at two meters per second dives towards a football flying towards him with a velocity of five meters pe
2 answers:
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Out of the given options, ‘it is described as a fundamental force and therefore does not depend on other forces’ is the true statement about gravity.
Answer: Option B
<u>Explanation: </u>
As we all know that there are four fundamental forces existing in the universe- Electromagnetic force, strong forces, weak forces and the gravitational force.
These are the forces that don’t depend on any other physical force to draw a considerable impact on the physical objects. The gravitational force can be defined as,
Where,
G = Gravitational Constant
= Masses of two substances under consideration
R = distance between the two substances.
Looking upon the formula of gravitational force we can easily estimate that the gravitational force relies on the mass of substances and the relative distance between them. There is no factor than the air friction that hinders the gravitational force and that too in a negligible amount.
Answer:
Vf = - 3 [m/s]
Explanation:
To solve this problem we must use the following equation of kinematics.
where:
Vf = final velocity [m/s]
Vo = initial velocity = - 7 [m/s]
a = acceleration = 1 [m/s²]
t = time = 4[s]
Now replacing:
Vf = -7 + (1*4)
Vf = - 3 [m/s]
Answer:
See explanation for details
Explanation:
The full mechanism of the nitration of an aromatic ring (benzene) is shown in the image attached. The electrophile is NO2^+. It us generated from HNO3/H2SO4. it attacks the benzene ring and leads to the formation of a delocalized intermediate which rearranges to form the product, in this case, nitrobenzene. Note that the intermediate can also be represented by a number of resonance structures.
