Answer:
The particle A will strike on the screen to the right (in -y₀). The particle B will strike to the left of the screen (in y₀), at the same distance than particle A from the x-axis but in the opposite direction. The particle C will strike to the right of the screen (in -y₁), the same direction than particle A, but nearer to the x-axis (see attached image)
The exact positions in the screen are (the point [0,y,0]):
Explanation:
The electric charges that move throw a region of space with a magnetic field will suffer a magnetic force (explain by Lorentz Force law). This force will force the particle to change direction but won't change its speed module. Therefore magnetic force act as a centripetal force.
The Lorentz Force law can be written as:
For particle A:
For particle B:
For particle C:
The force applied in each particle in the module is the same as you can see. Nevertheless, their directions are not. In the case of particles A and C, the force has a negative direction in the y-axis while in case B has a positive direction in the y-axis.
Knowing that the magnetic force is a centripetal force, we can find the radius of curvature:
For particle A:
For particle B:
For particle C:
Now we can obtain the exact point in the screen where the particle will strike. We can see than particle A and C are affected by the same force (same module and direction), but the radius of curvature of particle C is twice the one of particle A. Therefore the particle C will strike nearer to the x-axis than particle A.
In each case we can use Pythagoras Theorem to determine the point Y where the particles strike:
and in the triangle form
Therefore:
I am pretty sure it is called an interval between the 2 full Moons.
Answer:
Part a)
Pressure amplitude is
Part b)
displacement amplitude is given as
Part c)
Distance at the other intensity is
Explanation:
Part a)
As we know that intensity of sound at 5 m distance is 52 dB
so we have
now we have
Now we know that speed of sound at 20 degree C is given as
Now we know the relation of intensity of wave and pressure amplitude as
Part b)
Now displacement amplitude with pressure amplitude is related as
now bulk modulus of air is given as
also we know that
now we have
so we have
Part c)
As we know that intensity is inversely depends on the square of the distance
so we will have
Answer:
Explanation:
The radio signal travels to us at the speed of light, so at a speed of
The distance between the spaceship and the Earth is
Since the signal travel by uniform motion, we can write
where
t is the time the signal needs to reach the Earth
By solving the equation for t, we find