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
Fynjy0 [20]
3 years ago
12

An electron moving at right angles to a 0.1 T magnetic field experiences an acceleration of 6 × 1015 m.s-2. What is the speed of

the electron? How much does its speed change in 1 ns (10-9 s)?
Physics
1 answer:
GaryK [48]3 years ago
7 0

Explanation:

It is given that,

Magnetic field, B = 0.1 T

Acceleration, a=6\times 10^{15}\ m/s^2

Charge on electron, q=1.6\times 10^{-19}\ C    

Mass of electron, m=9.1\times 10^{-31}\ kg    

(a) The force acting on the electron when it is accelerated is, F = ma

The force acting on the electron when it is in magnetic field, F=qvB\ sin\theta

Here, \theta=90

So, ma=qvB

Where

v is the velocity of the electron

B is the magnetic field

v=\dfrac{ma}{qB}

v=\dfrac{9.1\times 10^{-31}\ kg\times 6\times 10^{15}\ m/s^2}{1.6\times 10^{-19}\ C\times 0.1\ T}

v = 341250  m/s

or

v=3.41\times 10^5\ m/s

So, the speed of the electron is 3.41\times 10^5\ m/s

(b) In 1 ns, the speed of the electron remains the same as the force is perpendicular to the cross product of velocity and the magnetic field.

You might be interested in
A room has a heater on one side and
Serjik [45]

Answer:

the warm air would be up and cool would be down

Explanation:

warm air is less dense and cool air is more dense

5 0
2 years ago
How much heat do you need to raise the temperature of 150 g of oxygen from -30c to -15c?
Naddika [18.5K]
The amount of heat needed to raise the temperature of a substance by \Delta T is given by
Q=m C_s \Delta T
where
m is the mass of the substance
Cs is its specific heat capacity
\Delta T is the increase in temperature

For oxygen, the specific heat capacity is approximately 
C_s = 0.92 J/(g K)
The variation of temperature for the sample in our problem is 
\Delta T= -15^{\circ}C-(-30^{\circ} C)=+15^{\circ}C=15 K
while the mass is m=150 g, so the amount of heat needed is
Q=m C_s \Delta T=(150 g)(0.92 J/g K)(15 K)=2070 J
4 0
3 years ago
Read 2 more answers
A motorboat accelerates uniformly from a velocity of 10.5 m/s to the west to a velocity of 6.5 m/s to the west. If its accelerat
BlackZzzverrR [31]

Answer:

7.4m ............................

3 0
3 years ago
A real image can be obtained with:
In-s [12.5K]

Answer:

convex lens and a concave mirror

4 0
3 years ago
Read 2 more answers
A satellite of mass m is moving in a circular orbit around the earth at a constant speed v and at an altitude h above the earth'
qwelly [4]

The satellite executes a rotation motion around the earth, because Earth's force of attraction plays the role of centripetal force:

Fa=Fcp=>k*Mp*m/(Rp+r)²=mv²/(Rp+r)=>v=√(k*Mp/(Rp+r))=√(6.67*10⁻¹¹*5.98*10²⁴/(6371*10³+1000*10³))=√(39.88*10¹³/(7371*10³))=√(5.41*10⁷)=7355.53 m/s


Check the calculations again !


7 0
3 years ago
Other questions:
  • A projectile is fired in such a way that its horizontal range is equal to 14.5 times its maximum height. what is the angle of pr
    6·1 answer
  • Which label identifies the statement: "Energy cannot be created or destroyed, but it can be converted or changed into different
    11·1 answer
  • A truck slows down. Which claim about the forces acting on the truck must be true? Choose 1 answer: Choose 1 answer: (Choice A)
    6·1 answer
  • PLEASE HELP - basic SUVAT stuff
    12·1 answer
  • Assuming that a2 is the magnitude of the horizontal acceleration of the block of mass m2, what is T, the tension in the string
    8·1 answer
  • Requirement 3. If Sierra Design wants to earn profits equal to 20​% of sales​ revenue, how much​ (what total​ fee) should the co
    8·1 answer
  • An external torque is applied to a flywheel which is a solid cylinder of mass m = 100 kg and radius
    9·1 answer
  • After you pick up a spare, your bowling ball rolls without slipping back toward the ball rack with a linear speed of vi=2.62 m/s
    8·1 answer
  • Observe a seguir os níveis de organização de um ser vivo e marque a alternativa que contém os termos que substituem adequadament
    15·2 answers
  • A stone of weight 10N falls from the top of a 250m high cliff. a) Calculate how much work is done by the force of gravity in pul
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!