Answer:
Explanation:
At thermal equilibrium we have heat given by aluminium must be equal to the heat absorbed by the water
so we will have
so we will have
so we have
so we have
TLDR: It will reach a maximum when the angle between the area vector and the magnetic field vector are perpendicular to one another.
This is an example that requires you to investigate the properties that occur in electric generators; for example, hydroelectric dams produce electricity by forcing a coil to rotate in the presence of a magnetic field, generating a current.
To solve this, we need to understand the principles of electromotive forces and Lenz’ Law; changing the magnetic field conditions around anything with this potential causes an induced current in the wire that resists this change. This principle is known as Lenz’ Law, and can be described using equations that are specific to certain situations. For this, we need the two that are useful here:
e = -N•dI/dt; dI = ABcos(theta)
where “e” describes the electromotive force, “N” describes the number of loops in the coil, “dI” describes the change in magnetic flux, “dt” describes the change in time, “A” describes the area vector of the coil (this points perpendicular to the loops, intersecting it in open space), “B” describes the magnetic field vector, and theta describes the angle between the area and mag vectors.
Because the number of loops remains constant and the speed of the coils rotation isn’t up for us to decide, the only thing that can increase or decrease the emf is the change in magnetic flux, represented by ABcos(theta). The magnetic field and the size of the loop are also constant, so all we can control is the angle between the two. To generate the largest emf, we need cos(theta) to be as large as possible. To do this, we can search a graph of cos(theta) for the highest point. This occurs when theta equals 90 degrees, or a right angle. Therefore, the electromotive potential will reach a maximum when the angle between the area vector and the magnetic field vector are perpendicular to one another.
Hope this helps!
Answer:
0 Kelvin
Explanation:
Atoms in absolute temperature get approximatelly motionless since 0 Kelvin is -273 degrees Celcius. The kinetic energy of atoms/particles in matter has the possible lowest value ( almost zero), so that there is nothing colder than 0 Kelvin.
Answer:
Angular acceleration = 6.37rad/sec²
Approximately, Angular acceleration =
6.4 rad/sec²
Explanation:
Length of the rod = 2.0m long
Inclination of the rod (horizontal) = 30°
Mass of the rod is not given so we would refer to it as = M
Rotational Inertia of the Rod(I) = 1/3ML²
Angular Acceleration = ?
There is an equation that shows us the relationship between Torque and Angular acceleration.
The equation is :
Torque(T) = Inertia × Angular Acceleration
Angular acceleration = Torque ÷ Inertia
Where:
Torque = L/2(MgCosθ)
Where M = Mass
L = Length = 2.0m
θ = Inclination of the rod (horizontal) = 30°
g = Acceleration due to gravity = 9.81m/s²
Inertia = 1/3ML²
Angular Acceleration = (Mass × g × Cos (30°) × (L÷2)) ÷ 1/3ML²
Angular Acceleration =
(3 × g × cos 30°) ÷ 2× L
Angular Acceleration = (3 × 9.81m/s² × cos 30°) ÷ 2× L
Angular Acceleration = 3 × 9.81m/s² × cos 30°) ÷ 2× 2.0m
Angular Acceleration = 6.37rad/sec²
Approximately Angular Acceleration =
6.4rad/sec²
The answer is Balance. hopei helped? ahahahaha
