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
MariettaO [177]
3 years ago
8

An electromagnetic wave is propagating towards the west. At a certain moment the direction of the magnetic field vector associat

ed with this wave points vertically up. The direction of the electric field vector of this wave options:
vertical and pointing down.
vertical and pointing up.
horizontal and pointing north.
horizontal and pointing south.
horizontal and pointing east.
Physics
1 answer:
ikadub [295]3 years ago
4 0

Answer:

Horizontal and pointing south.

Explanation:

The Poynting vector points in the direction of propagation (if the wave is a sinusoidal linearly polarized plane wave of fixed frequency, as it is in our case), and it's given by (all vectors):

S=E\times H

where H points in the same direction as B, the magnetic field. This means that E must point south, because the vectorial product of a vector pointing south by a vector pointing up gives a vector pointing west. This can be deduced by the right-hand rule: if our index finger is E and our middle finger is H, then the thumb is S.

You might be interested in
How long will it take a car to travel a distance of 1km if it has an average speed of 60kph​
beks73 [17]

Answer:

1÷60 h

time equals distance upon speed

6 0
3 years ago
Physics approach to study macromoelcues at nanoscales <br> in detail plx
erastova [34]

Answer:

Abstracto

Los ácidos nucleicos y las proteínas comprenden una red de biomacromoléculas que almacenan y transmiten información que sustenta la vida de la célula. El estudio de estos mecanismos es un campo llamado biología molecular. El desarrollo de esta ciencia siempre ha ido acompañado de avances técnicos que permiten romper barreras metodológicas para probar hipótesis novedosas. Entre los métodos disponibles para los biólogos moleculares, destacan cinco: electroforesis, secuenciación, clonación, transferencia y reacción en cadena de la polimerasa. Su impacto llega a la genética, la medicina y la biotecnología. Aquí, se revisan la relevancia histórica, los fundamentos técnicos y las tendencias actuales de estos cinco métodos esenciales. La revisión pretende ser útil tanto para estudiantes como para científicos profesionales que buscan adquirir conocimientos avanzados sobre el valor de estos métodos para investigar los mecanismos moleculares que sostienen la vida.

8 0
2 years ago
How can scientific method solve real world problems examples
Alborosie
The scientific method is nothing more than a process for discovering answers. While the name refers to “science,” this method of problem solving can be used for any type of problem
5 0
3 years ago
We can model the human back as a pivoted rod?
3241004551 [841]

Answer:

So the answer is yes, we can the back be shaped like a spinning rod

spinal column that is approximated by a long and narrow rod,

Explanation:

The bone system of the body is very well modeled in physics, the back has a spinal column that is approximated by a long and narrow rod, this rod is fixed in the lower part to the coccyx and has a weight in the upper part (head), this rod has longitudinal vertical movement and twisting movement around the lower part of the bar.

So the answer is yes, we can the back be shaped like a spinning rod

7 0
3 years ago
Compare superconductors and semiconductors with conductors and insulators
NeX [460]
Well a superconductor is a metal that acts strangely when cooled down to a certain temperature and a semiconductor and on the flip side a semiconductor<span>, is a material that has a conductivity somewhere between that of a conductor and an insulator. that is pretty much what i know  i hope this helps</span>
5 0
3 years ago
Read 2 more answers
Other questions:
  • A motorist enters a freeway at 45 km/h and accelerates uniformly to 99 km/h. From the odometer in the car, the motorist knows th
    9·1 answer
  • During the first 6 years of its operation, the Hubble Space Telescope circled the Earth 37,000 times, for a total of 1,280,000,0
    15·1 answer
  • A jet airplane flying from Darwin, Australia, has an air speed of 260 m/s in a direction 5.0º south of west. It is in the jet st
    13·1 answer
  • I will give you branilest
    15·1 answer
  • Which of the following statements is true? there are only about 100 different kinds of atoms that combine to form all substances
    14·1 answer
  • pressure A vertical piston cylinder device contains a gas at an unknown pressure. If the outside pressure is 100 kPa, determine
    5·1 answer
  • What is the weight of an object when the object has a mass of 22kg
    8·1 answer
  • A star produces energy by? ( a p e x )
    13·1 answer
  • How many meters across is a road sign that has an angular size of 120 arcseconds and is 1 km away?
    5·1 answer
  • The volume of the water in the graduated cylinder rose as some of the water was displaced by the table tennis ball. Find the vol
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!