During which process do cells use oxygen to release stored energy?

At some instant and location, the electric field associated with an electromagnetic wave in vacuum has the strength 57.5 V/m. Fi

n200080 [17]

Answer:

$1.9167\times 10^{-7}\ T$

$2.9247498849\times 10^{-8}\ J/m^3$

$8.7742496547\ W/m^2$

Explanation:

$\epsilon_0$ = Permittivity of free space = $8.85\times 10^{-12}\ F/m$

$\mu_0$ = Vacuum permeability = $4\pi \times 10^{-7}\ H/m$

E = Electric field = 57.5 V/m

c = Speed of light = $3\times 10^8\ m/s$

Magnetic field is given by

$B=\dfrac{E}{c}\\\Rightarrow B=\dfrac{57.5}{3\times 10^8}\\\Rightarrow B=1.9167\times 10^{-7}\ T$

The magnetic field strength is $1.9167\times 10^{-7}\ T$

Energy density is given by

$u=\dfrac{1}{2}\epsilon_0E^2+\dfrac{1}{2\mu_0}B^2\\\Rightarrow u=\dfrac{1}{2}\times 8.85\times 10^{-12}\times 57.5^2+\dfrac{1}{2\times 4\pi \times 10^{-7}}(1.9167\times 10^{-7})^2\\\Rightarrow u=2.9247498849\times 10^{-8}\ J/m^3$

The energy density is $2.9247498849\times 10^{-8}\ J/m^3$

Power flow per unit area is given by

$\dfrac{P}{A}=uc\\\Rightarrow \dfrac{P}{A}=2.9247498849\times 10^{-8}\times 3\times 10^8\\\Rightarrow \dfrac{P}{A}=8.7742496547\ W/m^2$

Power flow per unit area is $8.7742496547\ W/m^2$

7 0

3 years ago

The 10Ω resistor in the figure (Figure 1) is dissipating 80 W of power.

Shalnov [3]

I believe that the answer to the question provided above is that the <span>10Ω resistor in the figure (Figure 1) is dissipating 80 W of power has I = 2.82 A
and V=28.28 V.
</span>
Hope my answer would be a great help for you. If you have more questions feel free to ask here at Brainly.

8 0

3 years ago

2 What is the net force on an object when you combine a force of 17 N north with a force of 9 N north?

tekilochka [14]

Answer:

5N NORTH

Explanation:right on edge

4 0

3 years ago

How can the direction of rotation of a motor be changed?

KATRIN_1 [288]

The direction of rotation of a motor be changed by reversing two of its stator leads.

Electric motor is the electro-mechanical machine which converts the electrical energy into mechanical energy. In other words, the devices which produce rotational force is known as the motor.

In order to reverse the direction of an AC motor, we need to change the magnetic field the to make the movement in the opposite direction. As we change the direction of magnetic field , force will also get reversed by using Fleming's left hand rule .

Since each wire consists of a positive and negative current within the magnetic fields, the flip-flopping of main and starter wires causes the motor to run in reverse rotation

Hence, the direction of rotation of a 3-phase motor can be changed by reversing two of its stator leads.

To learn more about electric motor here

brainly.com/question/20038453

#SPJ4

5 0

2 years ago

Natural history research involves ____ unobsevable and unrepeatable past events.

Tanzania [10]

B verifying is the answer

4 0

4 years ago