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
Naily [24]
4 years ago
6

An excited hydrogen atom releases an electromagnetic wave to return to its normal state. You use your futuristic dual electric/m

agnetic field tester on the electromagnetic wave to find the directions of the electric field and magnetic field. Your device tells you that the electric field is pointing in the negative y direction and the magnetic field is pointing in the negative z direction. In which direction does the released electromagnetic wave travel?
a. +x direction
b. +y direction
c. +z direction
d. −z direction
Physics
1 answer:
Shkiper50 [21]4 years ago
8 0

Answer: Option a.

Explanation:

For an idealistic electromagnetic wave, both magnetic and electric fields are perpendicular to the travel direction of the wave.

Here we know that the electric field points to negative y-direction, and the magnetic field points to negative z-direction.

Then the wave must be traveling in the x-axis direction.

Then the correct option is a; +x direction (this is the only option that has the x-direction, then it is easy to identify it as the correct option)

You might be interested in
¿Con que parte de la mano se debe golpear a la pelota en voley?
cricket20 [7]

Answer:

give me a minute to find the answer

Explanation:

3 0
3 years ago
A girl is out jogging at 2.00 m/s and accelerates at 1.50 m/s^2 until she reaches a velocity of 5.00 m/s. How far does she get?
Maksim231197 [3]

Answer:

7.00 m

Explanation:

Given:

v₀ = 2.00 m/s

v = 5.00 m/s

a = 1.50 m/s²

Find: Δx

v² = v₀² + 2aΔx

(5.00 m/s)² = (2.00 m/s)² + 2(1.50 m/s²)Δx

Δx = 7.00 m

5 0
3 years ago
Some metal conductor has a resistance of 12 ohms. When plugged into a circuit, the amount of heat 144J is released in 12s. What
worty [1.4K]

Answer:

12V

Explanation:

Given parameters:

Resistance  = 12ohms

Heat released = 144J

Time taken = 12s

Unknown:

Voltage at the ends of the conductors = ?

Solution:

To solve this problem, we must first determine the power expended by the circuit.

Power is the rate at which work is done;

                P  = \frac{work done }{time}

                    = \frac{144}{12}

                    = 12W

Electrical power is given as;

             P  = IV  = \frac{V^{2} }{R}

            Since V is the unknown, we  solve for it;

          12  = \frac{V^{2} }{12}

           V  = 12V

5 0
4 years ago
How do the gravitational potential energy and the kinetic energy of the ball change as the ball rolls down the ramp?
belka [17]

Explanation:

The gravitational potential energy is given by :

P = mgh

The kinetic energy of an object is given by :

K=\dfrac{1}{2}mv^2

As the ball reaches the bottom of the ramp, its potential energy decreases and kinetic energy increases.

It imply that, when the ball at the top most height, its gravitational potential energy is maximum and zero kinetic energy and when ball reaches the bottom of the ramp, it will have maximum kinetic energy and zero potential energy.

3 0
3 years ago
A large capacitor in an air conditioner is typically connected to the potential difference provided to your house (120 V). Altho
fomenos

Answer:

A=7.72\times 10^{-18}\ m^2

Explanation:

Given:

  • the voltage of the source, V=120\ V
  • distance of separation between the capacitor plates, d=2\times 10^{-3}\ J
  • energy of the capacitor, U=0.25\ J

Assuming that there is free space between the plates, so the permittivity, \epsilon=9\times 10^{9}\ N.m^2.C^{-2}

<u>We have the energy stored in a capacitor as:</u>

U=\frac{1}{2}\times \frac{\epsilon.A.V^2}{d}

0.25=0.5\times \frac{9\times 10^{9}\times A\times 120^2}{2\times 10^{-3}}

A=7.72\times 10^{-18}\ m^2

5 0
4 years ago
Read 2 more answers
Other questions:
  • Young athlete has a mass of 42 kg one day there is no wind shear and hundred metre race in 14.2 second a sketch graph not in ske
    10·2 answers
  • A thin spherical shell of metal has a radius of 0.25 meter and carries a charge 0.2 mC. Calculate the electric intensity at a po
    14·1 answer
  • If a cylinder holds a volume of 100 cm3, and is 30 cm tall, which is the area of the bottom of the cylinder
    11·2 answers
  • Attempt 3 You attach a meter stick to an oak tree, such that the top of the meter stick is 2.07 meters above the ground. Later,
    5·1 answer
  • Water _____.
    13·1 answer
  • If two carts collide, what type of collision will conserve both momentum and kinetic energy?
    14·1 answer
  • Suppose a zero-resistance rod slides to the right on two zero-res a distance of 0.330 m. The rails are connected by a 16 2 resis
    8·2 answers
  • How many stars are on the us flag?
    12·2 answers
  • During an adiabatic process, an ideal gas does 25 j of work. what is the change in the internal (thermal) energy of the gas duri
    15·1 answer
  • During a circus performance, a 72-kg humancannonball is shot out of an 18-m-long cannon. If thehuman cannonball spends 0.95 s in
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!