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
erastova [34]
2 years ago
5

One beam of electrons moves at right angles to a magnetic field. The force on these electrons is 4.9 × 10-14 newtons. A second b

eam travels at the same speed, but at a 30° angle with the magnetic field. What force is on these electrons?
A.(4.9 × 10-14 newtons) · tan(30°)
B.(4.9 × 10-14 newtons) · sin(30°)
C.(4.9 × 10-14 newtons) · cos(30°)
D.(4.9 × 10-14 newtons) · arctan(30°)
E.(4.9 × 10-14 newtons) · arccos(30°)
Physics
2 answers:
larisa86 [58]2 years ago
4 0

Answer:

B.(4.9 × 10-14 newtons) · sin(30°)

Explanation:

The magnetic force exerted on charged particles by a magnetic field is given by

F=qvB sin \theta

where

q is the charge

v is the speed of the charge

B is the magnetic field intensity

\theta is the angle between the direction of v and B

The first beam moves at right angle to the magnetic field, so \theta=90^{\circ} and the force on this beam is simply

F=qvB=4.9\cdot 10^{-14} N (1)

The second beam moves at angle of \theta=30^{\circ}. The electrons are travelling at same speed v, and the magnetic field is still the same (and the charge q is also the same, since they are electrons as well), so the magnetic force in this case is

F=qvB sin 30^{\circ} (2)

But from the previous equation we know that

qvB = 4.9\cdot 10^{-14} N

so, if we substitute into eq. (2), we find

F=(4.9\cdot 10^{-14} N) \cdot sin 30^{\circ}

____ [38]2 years ago
3 0
Force on a particle with charge q moving with velocity v at an angle θ to a magnetic field B is F=qvBsin(θ).  So B is correct
You might be interested in
Two spherical conductors are separated by a distance much larger than either of their radii. Sphere A has a radius of 11.5 cm an
bonufazy [111]

Explanation:

As the given spheres are connected by a thin wire so, the potential on the spheres are the same.

          \frac{q_{1}}{r_{1}} = \frac{q_{2}}{r_{2}} ......... (1)

Hence, total charge will be as follows.

              q_{1} + q_{2} = Q = -95.5 nC .......... (2)

Using the above two equations, the final equation will be as follows.

          q_{2} = \frac{Qr_{2}}{r_{1} + r_{2}}

and,    q_{1} = \frac{Qr_{1}}{r_{1} + r_{2}}

Hence, we will calculate the charge on sphere B after the equilibrium is reached as follows.

          q_{2} = \frac{Qr_{2}}{r_{1} + r_{2}}

                     = \frac{-95.5 \times 74.4 cm}{(11.5 + 74.4) cm}

                     = 82.714 nC

Thus, we can conclude that the charge on sphere B after equilibrium has been reached is 82.714 nC.

                       

5 0
3 years ago
We intend to observe two distant equal brightness stars whose angular separation is 50.0 × 10-7 rad. Assuming a mean wavelength
san4es73 [151]

Answer:

13.4cm

Explanation:

According to Rayleigh’s criterion the angular resolution to distinguish two objects is given by:

\theta=1.22\frac{\lambda}{b}

θ = 50.0*10^-7 rad

λ: wavelength of the light = 550nm

b = diameter of the objective

By doing b the subject of the formula and replacing the values of the angle and wavelength you obtain:

b=1.22\frac{\lambda}{\theta}=1.22\frac{550*10^{-9}m}{50.0*10^{-7}rad}=0.134m=13.4cm

hence, the smallest diameter objective lens is 13.4cm

8 0
3 years ago
Read 2 more answers
Shadow and eclipses result from​
Basile [38]

\huge\mathsf{\red{\underline{\underline{Answer}}}}

{\green{\dashrightarrow}}When an opaque obstacle is placed between a source of light and a screen, a shadow of the obstacle is formed on the screen. The kind of shadow depends on the size of the source of light. In other words, the earth casts its shadow on the moon. The solar eclipse occurs when the moon comes between the sun and the earth.

7 0
2 years ago
Read 2 more answers
WHO WANts TO HAVE SOME GLIZZY ACTION
Lilit [14]
Bruh huh.............
6 0
2 years ago
Two or more velocities add by ____?<br><br> Plz help
VladimirAG [237]
By vector addition.
In fact, velocity is a vector, with a magnitude intensity, a direction and a verse, so we can't simply do an algebraic sum of the two (or more velocities). 
First we need to decompose each velocity on both x- and y-axis (if we are on a 2D-plane), then we should do the algebraic sum of all the components on the x- axis and of all the components on the y-axis, to find the resultants on x- and y-axis. And finally, the magnitude of the resultant will be given by
R= \sqrt{(R_x)^2+(R_y)^2}
where Rx and Rx are the resultants on x- and y-axis. The direction of the resultant will be given by
\tan \alpha =  \frac{R_y}{R_x}
where \alpha is its direction with respect to the x-axis.
3 0
3 years ago
Read 2 more answers
Other questions:
  • A satellite completes one revolution of a planet in almost exactly one hour. At the end of one hour, the satellite has traveled
    15·2 answers
  • How are gold medal and the human cell similar? How do they differ?
    15·2 answers
  • The hormone glucagon is released by number of different tissues in the body to stabilize blood glucose levels. Which of the foll
    6·1 answer
  • A 2.1 times 103 - kg car starts from rest at the top of a 5.0 - m - long driveway that is inclined at 20 deg with the horizontal
    10·1 answer
  • Which BEST describes the difference between speed and velocity?
    10·2 answers
  • A 9 kg blob moving at 5 m/s collides and sticks to a second blob with a mass of 5 kg. If the two bobs stick together, what will
    12·1 answer
  • HELP ASAP!! WILL TRY TO GIVE BRAINLIEST
    15·1 answer
  • The initial velocity of a truck is 10 m/s. How long must it accelerate at a constant acceleration of 2m/s2 before its average ve
    13·1 answer
  • An unknown force is applied to a 12 kg mass. The force acts at an angle of 30.0 degrees above the horizontal. Determine the forc
    10·1 answer
  • A 25kg child resting at the top of a 2 meter slide has how much potential energy?
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!