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
snow_lady [41]
3 years ago
10

In these formulas, it is useful to understand which variables are parameters that specify the nature of the wave. The variables

E_0and B_0 are the __________ of the electric and magnetic fields.
a. maximas
b. wavelenghts
c. amplitudes.
d. velocities
Physics
1 answer:
xeze [42]3 years ago
3 0

Answer:

the question has some missing details i.e E = E0sin(kx -wt)y and B = B0sin(kx -wt)z

The variables E0 and B0 are the amplitudes.

option C is correct.

Explanation:

Compare the equation given with the general wave equation ; Y = Asin(kx - wt)

Where A is the amplitude

You might be interested in
What is the magnification when an object is placed at 2f from the pole of the convex mirror? 
Gekata [30.6K]

Answer:

Linear magnification = 1/3

Explanation:

Given:

Convex mirror

Object's distance from pole = 2f

Find:

Linear magnification

Computation:

Object distance, u = −2f

So,

1/v + 1/u = 1/f

1/v + 1/(-2f) = 1/f

1/v = 1/f + 1/2f

BY taking LCM

1/v = 3 / 2f

v = 2f / 3

Magnification, M = -v / u

So,

Magnification, M = (2f / 3) / 2f

Magnification, M = 2f / 6f

Magnification, M = 2 / 6

Linear magnification = 1/3

 

5 0
2 years ago
The current supplied by a battery as a function of time is I(t) = (0.88 A) e^(-t*6 hr). What is the total number of electrons tr
Nimfa-mama [501]

Answer:

N = 1.2 \times 10^{23}

Explanation:

As we know that the current through the battery is given as

i = (0.88 A) e^{-t/6}

here from above equation we know that current will become zero when time elapsed is very large

so here we can say that charge will flow through the battery from t = 0 to t = infinite

now we have

q = \int i dt

q = \int (0.88 A) e^{-t/6} dt

q = 0.88\times -6(3600)\times (e^{-t/6})

q = -1.90 \times 10^{4} (0 - 1)

q = 1.90 \times 10^{4} C

As we know that

q = Ne

N = \frac{q}{e}

N = \frac{1.90 \times 10^4}{1.6 \times 10^{-19}}

N = 1.2 \times 10^{23}

4 0
3 years ago
Saved
Anon25 [30]

Total distance moved by bead is 1.952 cm.

Explanation:

Let first consider all data that are given in question.

1.    F = 8 N                       ...force acting on string

2.   f  = 2 Hz                     ...frequency of system

3.   β = 4 cm = 0.04 m    ...wavelength of wave formed due to vibration           4.   A =  1 cm  = 0.01 m     ...Amplitude of vibration

Under certain conditions, waves can bounce back and forth through a particular region, effectively becoming stationary. These are called standing waves.

Here,it is due to vibration induced in spring due to tension induced in string

Standing wave equation is given by

y = (x,t) = 2A * sinK x * cos (wt)                ...(1)

Let first find, value of K, x, w, t

k = 2 * pi / beta                                          ....(2)

Where β is wavelength in meters

                   K is wave number

k = 2 * pi / 0.01

k = 628.31 m^{-1}

now, let us find value of w

W = 2 x pi x f                               ....(3)

                where f is frequency in hertz

W = 2 x pi x 2

W = 4 x pi

W = 0.08 \frac{m}{s}

y = (x,t) = 2A * sinK x * cos (wt)

now, let us find value of v that is wave speed

Notice that some x-positions of the resultant wave are always zero no matter what the phase relationship is.  These positions are called nodes.

Finding the positions where the sine function equals zero provides the positions of the nodes.

In our case, and      

K * x = pi

x = 0.04 / 2

x = 0.02

y = (0.02,1) = 2(0.01) * sin pi  * cos (12.5664 * 1)

y = (0.02,1) = 2(0.01) * -1  * cos 0.9761

Y = 1.952 cm

Finally, when bead is at middle of the string, total distance after stretch covered  is 1.952 cm.

3 0
3 years ago
There are two types of body waves that travel out from the epicenter of an earthquake they have unique characteristics choose ea
Komok [63]

Answer:

d

Explanation:

distorts or shears rock as it travels through it

4 0
3 years ago
A car is traveling at an average speed of 70 m/s. How many km would the car travel in 6.5 hrs. ?
docker41 [41]

Answer:

<h2>38,769.23 miles</h2>

Explanation:

given:

A car is traveling at an average speed of 70 m/s.

find:

How many km would the car travel in 6.5 hrs. ?

solution:

distance = velocity over time

let velocity = 70 m/s

           time = 6.5 hrs.

convert velocity 70 m/s into m/h for consistency of units.

<u>70 mi. </u> x   <u>3600 sec.</u>  =  252,000 mi/hour

  sec.          1 hr.

now plugin values into the formula d = v/t

d = <u>252,000 miles/hour </u>

              6.5 hours

d = 38,769.23 miles

therefore, the distance travelled in 6.5 hours with a speed of 70 m/s is 38,769.23 miles

5 0
3 years ago
Other questions:
  • One degree kelvin equals one degree Fahrenheit ? True or false
    10·1 answer
  • The position within a baseball team that is responsible for catching balls in the outfield is called the catcher ? true or false
    14·2 answers
  • If the force of gravity between a book of mass 0.50 kg and a calculator of 0.100 kg is 1.5 × 10-10 N, how far apart are they?
    14·1 answer
  • If the speed of a car is increased by 80%, by what factor will its minimum braking distance be increased, assuming all else is t
    12·1 answer
  • What is the definition of a reference point
    7·1 answer
  • When kicking a football, the kicker rotates his leg about the hip joint. If the velocity of the tip of the kicker’s shoe is 35.0
    11·1 answer
  • Which equation shows the relationship of wave speed to
    15·1 answer
  • A student's room has a TV (250 W) ,heater (1150 W) and lamp (200 W) Electricity costs 10 fills per KWh. Calculate how much it wo
    15·1 answer
  • HELP ME PLEASE!!!!
    14·1 answer
  • . Which pair of concurrent forces could produce
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!