1: to do work faster.
2: to save the precious time.
3: to save labours
Answer: If a velocity time graph is horizontal then the velocity is constant and there is no acceleration.
Answer:
Maximum speed of the coin, v = 0.607 m/s
Explanation:
It is given that,
A coin rests on a record 0.13 m from its center i.e. the radius of the circular path, r = 0.13 m
The coefficient of static friction between the coin and the record is, 
The centripetal force acting on the coin is balanced by the frictional force. Its mathematical relation is given by :
v = 0.607 m/s
So, the maximum coin speed at which it does not slip is 0.607 m/s. Hence, this is the required solution.
Vascular tissue is responsible for transporting water and nutrients in plants.The Vascular tissue consists of the Xylem and the Phloem. The main function of the Xylem is to transport water and minerals throughout all parts of the plant. Phloem on the other hand is responsible for transporting organic molecules that are larger in size. The vascular system, consisting on the Xylem and the Phloem runs from the roots of the plats through the branches and upto the leaves. It controls the total transportation of the water and nutrients.
<span>The long tubes that carry water and sugar from the leaves to the rest of the plat are known as phloem. The Xylem on the other hand carries water and small minerals from the root through the branches to the leaves for producing glucose and oxygen. The xylem and phloem are two most important parts of plants that are required for the survival of the plant. Water is mainly carried by the Xylem but some amount of water goes through the phloem for transporting the glucose that is manufactured. The process of photosynthesis is highly dependent on Xylem and Phloem.<span> </span></span>
Answer:
r = 0.664 m.
Explanation:
Let's write the equation of the magnetic force, the blacks syndicate vectors
F = q v x B
From this expression we see that the force is perpendicular to the velocity and the field, so it is a centripetal force, the modulus of the force is
F = q v B sinT
We write Newton's second law
F = m a
a = v² / r
q v B sinT = m v² / r
r = m v / (q B sinT)
Let's calculate
r = 9.1 10-31 2.9 107 / (1.6 10-19 1.7 10-3 sin8.4)
r = 26.4 10-24 / 0.3973 10-22
r = 0.664 m
This is the distance from where the electron penetrates
