Refer to the diagram shown below.
The angle is in quadrant 4, therefore cos θ is positive.
The length of the hypotenuse is determined from the Pythagorean theorem as
c² = 3² + 4² = 25
c = 5
Calculate cosine of the reference angle.
cos θ = 3/5
Answer: 3/5
That's true.
Magnets attract some metals such as iron, nickel, etc.
Hope this helps~
Answer:
The tension in the string at that point is 90.75 N
Explanation:
Given;
mass of the object, m = 3 kg
length of string, r = 0.25 m
the angular velocity, ω = 11 rad/s
The tension on string can be equated to the centrifugal force on the object;
T = mω²r
Where;
T is the tension in the string
m is mass of the object
ω is the angular velocity
r is the radius of the circular path
T = 3 x (11)² x 0.25
T = 90.75 N
Therefore, the tension in the string at that point is 90.75 N
Because those layers have been in existence longer than the layer on top of it.
Potential energy can be defined as the energy of something in relation to others, stresses within itself, or the electric charge.
Elastic potential energy the energy that is stored due to the deformation of an elastic object (i.e. a spring). This energy is equal to the energy needed to stretch the spring.
Chemical potential energy is energy stored in a substance's chemical bonds. This energy can be absorbed/released during either a chemical reaction or a phase transition.