Answer:
A) v = 40 m / s, B) v_average = 20 m / s
Explanation:
For this exercise we will use the kinematics relations
A) the final velocity for t = 5 s and since the body starts from rest its initial velocity is zero
v = vo + a t
v = 0 + 8 5
v = 40 m / s
B) the average velocity can be found with the relation
v_average = vf + vo / 2
v-average = 0+ 40/2
v_average = 20 m / s
f(3) represents the number of additional square feet the construction crew has paved after 3 hours, not including the initial paved amount.
Mathematical models are representations of real situations. Models often serve the purpose of prediction and can help to explain and simplify certain mathematical problems.
The model; f(x) = 300x + 1,000 represents the number of additional square feet that can be paved in an hour after 1,000 square feet has already been paved.
From the above we can see that the correct answer is; "900 square feet; f(3) represents the number of additional square feet the construction crew has paved after 3 hours, not including the initial paved amount."
Learn more: brainly.com/question/731147
You want v2 = v1 + at
v is measured in m/s, a in m/s2, and t in s.
the dimensions multiply like algebraic quantities.
so because v2 is measured in m/s, then (v1 + at) has to come out in m/s
the units for (v1 + at) are (m/s) + (m/s2)(s)
time "s" cancels out one acceleration "s", so it comes ut to (m/s) + (m/s), which = (m/s).
if you had (v1t + a), then you would have (m/s)(s) + (m/s2) which = (m) + (m/s2), which doesn't work.
Answer:
Explanation:
Given,
After two revolutions, angular speed = 0.5 rev/s
Angular speed after 8 revolution = ?
Using equation of circular motion
Now, Angular speed after 8 revolution
Hence, the angular speed after 8 revolution is equal to 1 rad/s.
Answer: protons
Explanation:
Protons are positively charged elementary particles of hydrogen atom nuclei, and have a much greater weight than that of electrons.
In this sense, proton therapy consists in pointing to a tumor with an invisible and highly controlled beam that works with precision as if it were drawn with the tip of a pencil.
It should be noted that, firstly protons are accelerated inside a cyclotron at a speed that is equal to approximately half the speed of light (allowing them to have high energy) allowing the damage to tumors up to a depth of approximately 30 cm.
After the protons are accelerated in the cyclotron, they are directed with a strong magnetic field to a very narrow beam and transferred with a high degree of precision through the malignant tumor. This high amount of energy released in a controlled manner in the tumor tissue, results in ionization and damage to the DNA of the malignant cells that are attacked, causing them to stop dividing rapidly (the cause of cancer) or even causing the cells to die, immediately
This is a highly effective treatment that has no side effects in damage to healthy tissue surrounding the tumor, unlike X-ray therapies.
