Answer:
A box sits stationary on a ramp
Explanation:
Static friction is a force which keeps an object at rest as it is in the case of the box. It has to be overcome for the object to be set into motion.
Static force of friction is calculated as follows:
F= μη
F is static force of friction.
μ is the coefficient of static friction.
η is the normal force.
Answer:
Weathering is the breakdown of rocks at the Earth's surface, by the action of rainwater, extremes of temperature, and biological activity. It does not involve the removal of rock material. There are three types of weathering, physical, chemical and biological.
Explanation:
Please give brainlest and points!
Answer:
Explanation:
As per Ampere's law of magnetic field we know that
line integral of magnetic field along closed ampere's loop is equal to the product of current enclosed and magnetic permeability of medium
So it is given as
here we can say that enclosed current is given as
now from ampere'e loop law for any point inside the wire we will have
now we know that magnetic field inside the wire is 84% of the field at its surface
so we will have
so we have
now we know
here i = 2 A
so now we have
Answer:
e) 160,000 years from now.
Explanation:
The distance of the supergiant from us is
d = 150,000 light years
This means that the light emitted by the star takes 150,000 years to reach us.
We are told that the star will become a supergiant in
t = 10,000 years
from now. When this will happen, the light from the supernova will not reach us instantaneously, but it will take 150,000 years to travel the distance between us and the star.
Therefore, the supernova will be visible on Earth only after:
T = 10,000 y + 150,000 y = 160,000 years
So, option E) is correct.
Complete Question
(A) What is the maximum tension possible in a 1.00- millimeter-diameter nylon tennis racket string?
(B) If you want tighter strings, what do you do to prevent breakage: use thinner or thicker strings? Why? What causes strings to break when they are hit by the ball?
The tensile strength of the nylon string is
Answer:
A
T = 471.3 \ N
B
To prevent breakage the thickness of the string is increased
String breakage when the racket hit the ball is as a result of the string not being thick enough to withstand the increase in tension
Explanation:
From the question we are told that
The diameter is
The tensile strength of the nylon string is
Generally the radius is mathematically evaluated as
=>
=>
The cross sectional area is mathematically represented as
=>
=>
Generally the tensile strength of nylon is mathematically represented as
Where T is the tension on the maximum tension on the string
So
=>
=>
Form the equation above we see that
So if the tension is increased to prevent breakage the thickness of the string is increased(i. e the cross-sectional area )
String breakage when the racket hit the ball is as a result of the string not being thick enough to withstand the increase in tension