To solve this problem we will resort to the concept of angle of incidence and refraction.
Since it is a reflection on a mirror, the angle provided for refraction will be equal to that of the incidence, that is, 25 °
The angle of reflation is always perpendicular to the surface so it is necessary to find the angle with respect to it.
Therefore the angle of the reflected beam of light made with the surface normal is 65°
Answer:
Heat can travel from one place to another in three ways: Conduction, Convection and Radiation. Both conduction and convection require matter to transfer heat. If there is a temperature difference between two systems heat will always find a way to transfer from the higher to lower system.
Explanation:
Hope this helps
The electric field points in the +x direction and the particle's charge is positive, therefore the electric force points in the +x direction.
The electric force acting on the particle is:
F = Eq
F is the electric force, E is the electric field strength, and q is the charge.
Given:
E = 1290N/C
q = 6.58×10⁻⁶C
F = 1290(6.58×10⁻⁶) = 8.49×10⁻³N
The net force points in the +x direction, yet its magnitude is smaller than the magnitude of the electric force, so the magnetic force must point in the -x direction with a magnitude equal to the difference between the electric force and net force:
8.49×10⁻³ - 6.17×10⁻³
= <em>2.32×10⁻³N</em>
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The particle's velocity lies in the x-y plane and the magnetic field points in the +z direction. The velocity is perpendicular to the magnetic field, therefore the magnitude of the magnetic force can be calculated by:
F = qvB
F is the magnetic force, q is the charge, v is the velocity, and B is the magnetic field strength.
Given values:
F = 2.32×10⁻³N (solved for previously)
q = 6.58×10⁻⁶C
B = 1.27T
Plug in the values and solve for v:
2.32×10⁻³ = 6.58×10⁻⁶v(1.27)
v = 278m/s
Answer:
13.5 ms
Explanation:
The sound wave travels with uniform motion in both cases, so the time taken to cover a distance d is given by:
where
d is the distance to cover
v = 340 m/s is the speed of sound in air
So for the people across the newsroom,
d = 4.7 m
So the time taken is
The radio waves instead travels with uniform motion at the speed of light:
So the time taken for them is
where
d = 82 km = 82,000 m
is the distance of the people who are 82 km away. Substituting,
Therefore, the difference in time is
Answer:
685.6 J
Explanation:
The latent heat of vaporization of ammonia is
L = 1371.2 kJ/kg
mass of ammonia, m = 0.0005 Kg
Heat = mass x latent heat of vaporization
H = 0.0005 x 1371.2
H = 0.686 kJ
H = 685.6 J
Thus, the amount of heat required to vaporize the ammonia is 685.6 J.