1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Molodets [167]
3 years ago
15

Scientists study a radioactive source that produces a stream of positively-charged particles moving with different speeds along

the x-axis. The stream enters a box with a uniform magnetic field B = 0.1 T directed along the z-axis and a uniform electric field E of unknown strength and direction. Scientists observe that the particles that move with the speed of 2 m/s are not deflected in the box at all. A. (6 points) Find the direction and the strength of the electric field in the box. Scientists allow only undeflected particles to leave the box through a small opening and enter a big chamber that contains only magnetic field B = 0.1 T along the z-axis. B. (2 points) Describe the trajectory of the particles in the chamber. C. (6 points) Scientists notice that the particles completely reverse their direction of motion in 0.1 ms after entering the chamber. Assuming that their particle’s charge is 1.6 x 10-19 C, determine the mass of the particles
Physics
2 answers:
soldi70 [24.7K]3 years ago
3 0

Answer:

A)

Explanation:

A)  the particles do not reflect the electric and magnetic forces, they must have the same magnitude and opposite direction.

the magnetic force is perpendicular to the speed that is on the x axis and to the magnetic field that stakes the z axis, so the force goes in the direction of the positive y axis.

With this force it must be opposite to the electric force, this implies that the electric field must go in the direction of the negative y axis.

Let's use Newton's equation of equilibrium

                F_{m} - F_{e} = 0

                 FM = Fe

                 .q v B = q E

                  E = v B

                  E = 2 0.1

                   E = 0.2 N / C

.b) when the particular one reaches the camera with a magnetic field, the magnetic force perpendicular to the speed causes them to start a uniform circular movement since the magnitude of the speed does not change.

With the magnetic force it is on the axis and the circle described by the particles is on this axis

.c) The particles are in a circular motion the point where their motion is reversed they move in the negative direction when they are at the lowest or highest part of the path or I know that they have traveled

     

Let's use kinematics

               .v = va - a t

               .v = -vow

               -vow = vow - at

               .a = 2 vow / t

               .a = 2 2 / 0.1 10-3

               .a = 40 103 m / s2

Now let's use Newton's second law

                 FM = m a

                  Q v B = m a

            .m = q v B / a

           .m = 1.6 10-19 2.0 0.1 / 40 103

            .m = 8 10-25 kg

sammy [17]3 years ago
3 0

Answer:

a) The strength of the electric field is 0.2 V/m and its direction is -y axis.

b) The particle moves in a circular path because the magnetic force is perpendicular to its speed.

c) The mass of the particle is 5.09x10⁻²⁵ kg

Explanation:

a) If the magnetic field has a z direction and the speed is towards x, therefore, the magnetic force has a y direction. Because of this, so that the particle does not deviate, the electric field must be in the direction -y. The magnitude is equal to:

E = B*V = 0.1*2 = 0.2 V/m

b) The particle moves in a circular path because the magnetic force is perpendicular to its speed.

c) The time period is:

T = 2*t = 2*0.1 = 0.2 ms

The mass of the particle is:

m =\frac{BqT}{2\pi } =\frac{0.1*1.6x10^{-19}*0.2x10^{-3}  }{2\pi } =5.09x10^{-25} kg

You might be interested in
What is produced as the result of unequal warming of the earth's surface?
Soloha48 [4]
Unusual precipitation patterns 
7 0
3 years ago
The site<br> of proteins is called what
ValentinkaMS [17]

Answer: Ribosomes are the site of protein synthesis, and they convert the coded information in messenger RNA into an actual protein molecule.

I hope this helped! OvO

8 0
3 years ago
Read 2 more answers
ONE sound wave travels through two containers of different gasses. Wave through container 1 has a wavelength of 1.2 m. Wave thro
Zarrin [17]
I’m not 100% but the answer is b
7 0
2 years ago
A speed skater moving across frictionless ice at 8.4 m/s hits a 5.7 m -wide patch of rough ice. She slows steadily, then continu
malfutka [58]

Answer:

Acceleration, a=-2.48\ m/s^2

Explanation:

Initial speed of the skater, u = 8.4 m/s

Final speed of the skater, v = 6.5 m/s

It hits a 5.7 m wide patch of rough ice, s = 5.7 m

We need to find the acceleration on the rough ice. The third equation of motion gives the relationship between the speed and the distance covered. Mathematically, it is given by :

v^2-u^2=2as

a=\dfrac{v^2-u^2}{2s}

a=\dfrac{(6.5)^2-(8.4)^2}{2\times 5.7}

a=-2.48\ m/s^2

So, the acceleration on the rough ice -2.48\ m/s^2 and negative sign shows deceleration.

8 0
3 years ago
A 4 kg car with frictionless wheels is on a ramp that makes a 25° angle with the horizontal. The car is connected to a 1 kg mass
stellarik [79]
Refer to the diagram shown below.

W₁ = (4 kg)*(9.8 m/s²) = 39.2 N
W₂ = (1 kg)*(9.8 m/s²) = 9.8 N

The normal reaction on the 4-kg mass is
N = (39.2 N)*cos(25°) = 35.5273 N
The force acting down the inclined plane due to the weight is
F = (39.2 N)*sin(25°) = 16.5666 N

The net force that accelerates the 4-kg mass at a m/²s down the plane is
F - W₂ = (4 kg)*(a m/s²)
4a = 16.5666 - 9.8
a = 1.6917 m/s²

Answer: 1.69 m/s²  (nearest hundredth)

7 0
3 years ago
Other questions:
  • A Michelson interferometer uses light with a wavelength of 452.446 nm. Mirror M2 is slowly moved a distance x, causing exactly 2
    12·1 answer
  • What is the height of the cliff?
    8·1 answer
  • A truck moves 60 kilometers east from point A to point
    13·2 answers
  • A current of 3.60A flows for 15.3s through a conductor. Calculate the number of electrons that pass through a point in the condu
    15·1 answer
  • The most common isotope of hydrogen contains a proton and an electron 'separated by about -11-27 5.0 x 10 m. The mass of proton
    5·1 answer
  • The wind blows a leaf at 37.9 m/s for 118 s left. How are does the leaf go in that period of time.
    14·1 answer
  • Question 10 (1 point)
    5·1 answer
  • During the expansion of a gas in piston-cylinder the relation between the pressure and the volume is given as
    9·1 answer
  • Two representative elements are in the same period of the periodic table. Which statement correctly describes the atoms of the t
    15·1 answer
  • A concrete block (B-36 x10 °C-') of volume 100 mat 40°C is cooled to
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!