Answer:
the reason for the acceleration month that the coefficient of kinetic friction is less than the coefficient of satic frictionExplanation:
This exercise uses Newton's second law with the condition that the acceleration is zero, by the time the body begins to slide. At this point the balance of forces is
fr- w || = 0
The expression for friction force is that it is proportional to the coefficient of friction by normal.
fr = μ N
When the system is immobile, the coefficient of friction is called static coefficient and has a value, this is due to the union between the surface, when the movement begins some joints are broken giving rise to coefficient of kinetic friction less than static.
In consequence a lower friction force, which is why the system comes out of balance and begins to accelerate.
μ kinetic <μ static
In all this movement the normal with changed that the angle of the table remains fixed.
Consequently, the reason for the acceleration month that the coefficient of kinetic friction is less than the coefficient of satic friction
Answer:
it's the second one;
if the frequency increases, wavelength decreases
Explanation:
we know, v=f×lamda(wave length)
so for constant velocity Frequency f is inversely proportional to lamda
i.e.
fα 1/lamda
so as the f increases lamda decreases and vise versa
Answer: True
The statement " the synthesis of a large collection of information that encompasses well tested and verified hypothesis about certain aspects of natural world is known as <em>"scientific theory". </em>
It was proposed by Charles Darwin and Alfred Russel in the mid 19th century.
Typically, it is about the relationship between various facts and is a way of providing a concise explanation for what's been observed. A scientific theory is a well- substantiated explanation of an aspect of the natural world.
The National
Fire Protection Association (NFPA) states that the furthest reaches of human
temperature viability is 212°F, well beneath temperatures found in most
noteworthy structure fires that are past the development (early) stage. In the
present fire conditions, temperatures higher than 500°F can be effortlessly gotten
inside three to four minutes. Flashover, which happens at roughly 1,100°F, can
grow well under five minutes.2 If a space isn't legitimate for firefighters,
caught casualties aren't probably going to survive either. Set aside the
opportunity to make it safe and keep your firefighters from going for broke.
<span>60% of the
casualties were found to have been presented to warm (most at temperatures over
200°F; some were beneath) and mugginess for six to seven minutes (remote from
the fire range).</span>
Sigmund Freud. He is also the father of psychoanalysis.
