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
mixas84 [53]
3 years ago
13

Images to promote fitness often lead readers to a certain conclusion about appearance. Which of the following is a practice teen

s most frequently experience?  A focus on feeling good about their looks A focus on their appearance A focus on feeling great inside A focus on their health and fitness
Physics
2 answers:
Marat540 [252]3 years ago
8 0
It's either A or B. Most likely B
Anni [7]3 years ago
7 0
A because it if the correct answer
You might be interested in
What are plane mirrors ?
forsale [732]

Explanation:

Mirrors consist of reflecting surfaces that reflect light.

Reflection is a phenomenon of light wave (but also of other types of waves) in which a ray of light hits a surface, and then it bounces back into the original medium at a certain angle.

The direction of the reflected ray is determined by the law of reflection:

  • The incident ray, the reflected ray and the normal to the surface all lie in the same plane
  • The angle of reflection is equal to the angle of incidence (where both angles are measured between the ray and the normal to the surface)

A plane mirror is a type of mirror consisting of a straight surface. As a result, light incident perpendicular to the surface is reflected back exactly in the opposite direction.

The image formed by a plane mirror is:

- The same size as the object

- Virtual (it is located behind the mirror)

- Laterally inverted

- Upright

3 0
3 years ago
What is the importance of time ?
lesantik [10]
I think that the importance of time is to allow there to be order. People need to be somewhere at a certain time and not just whenever they want. It allows people to get things done more efficiently. <span />
8 0
3 years ago
Which statement accurately describes CI2?
atroni [7]
1. 100,000% A. I simply googled C12 and it's the most stable Isotope of Carbon... 

2. A as well.. 99% sure.. and so far my 99% sure has been 100% correct so ... :p
8 0
3 years ago
Read 2 more answers
The inner cylinder of a long, cylindrical capacitor has radius r and linear charge density +λ. It is surrounded by a coaxial cyl
Ulleksa [173]

Hi there!

a)

We can begin by using the equation for energy density.

U = \frac{1}{2}\epsilon_0 E^2

U = Energy (J)

ε₀ = permittivity of free space

E = electric field (V/m)

First, derive the equation for the electric field using Gauss's Law:
\Phi _E = \oint E \cdot dA = \frac{Q_{encl}}{\epsilon_0}

Creating a Gaussian surface being the lateral surface area of a cylinder:
A = 2\pi rL\\\\E \cdot 2\pi rL = \frac{Q_{encl}}{\epsilon_0}\\\\Q = \lambda L\\\\E \cdot 2\pi rL = \frac{\lambda L}{\epsilon_0}\\\\E = \frac{\lambda }{2\pi r \epsilon_0}

Now, we can calculate the energy density using the equation:
U = \frac{1}{2} \epsilon_0 E^2

Plug in the expression for the electric field and solve.

U = \frac{1}{2}\epsilon_0 (\frac{\lambda}{2\pi r \epsilon_0})^2\\\\U = \frac{\lambda^2}{8\pi^2r^2\epsilon_0}

b)

Now, we can integrate over the volume with respect to the radius.

Recall:
V = \pi r^2L \\\\dV = 2\pi rLdr

Now, we can take the integral of the above expression. Let:
r_i = inner cylinder radius

r_o = outer cylindrical shell inner radius

Total energy-field energy:

U = \int\limits^{r_o}_{r_i} {U_D} \, dV =   \int\limits^{r_o}_{r_i} {2\pi rL *U_D} \, dr

Plug in the equation for the electric field energy density and solve.

U =   \int\limits^{r_o}_{r_i} {2\pi rL *\frac{\lambda^2}{8\pi^2r^2\epsilon_0}} \, dr\\\\U = \int\limits^{r_o}_{r_i} { L *\frac{\lambda^2}{4\pi r\epsilon_0}} \, dr\\

Bring constants in front and integrate. Recall the following integration rule:
\int {\frac{1}{x}} \, dx  = ln(x) + C

Now, we can solve!

U = \frac{\lambda^2 L}{4\pi \epsilon_0}\int\limits^{r_o}_{r_i} { \frac{1}{r}} \, dr\\\\\\U = \frac{\lambda^2 L}{4\pi \epsilon_0} ln(r)\left \| {{r_o} \atop {r_i}} \right. \\\\U = \frac{\lambda^2 L}{4\pi \epsilon_0} (ln(r_o) - ln(r_i))\\\\U = \frac{\lambda^2 L}{4\pi \epsilon_0} ln(\frac{r_o}{r_i})

To find the total electric field energy per unit length, we can simply divide by the length, 'L'.

\frac{U}{L} = \frac{\lambda^2 L}{4\pi \epsilon_0} ln(\frac{r_o}{r_i})\frac{1}{L} \\\\\frac{U}{L} = \boxed{\frac{\lambda^2 }{4\pi \epsilon_0} ln(\frac{r_o}{r_i})}

And here's our equation!

3 0
2 years ago
Select all that apply.
bonufazy [111]

Mechanical energy of the ball will remain conserved

so here we have

E = mgh + \frac{1}{2}mv^2

E = 0.200(9.8)(2) + 0

E = 3.92 J

so mechanical energy will remain same at all positions

Now when ball comes to position of 1 m height then potential energy is given as

U = mgh

U = (0.200kg)(9.8 m/s^2)(1 m)

U = 1.96 J

Now since total mechanical energy is conserved so we will say

KE + U = E

KE + 1.96 = 3.92

KE = 1.96 J

so we have

its mechanical energy = 3.92 J

its potential energy = 1.96 J

its kinetic energy = 1.96 J

4 0
2 years ago
Other questions:
  • Newton observed the action of a prism on white light and on red light. Because he (did or did not) control the event, this inves
    6·2 answers
  • What is the magnitude of the velocity when the elastic potential energy is equal to the kinetic energy? (Assume that U=0 at equi
    15·1 answer
  • Which best explains why scientific theories grow stronger over time?
    7·1 answer
  • Jose is batting for the home team when he hits a foul ball that rises straight up over home plate. A fan in the stands notices t
    10·1 answer
  • The three factors that determine the amount of potential energy in an object are ________, ___________, and _________.
    12·2 answers
  • Will someone help me will give Brainliest.
    6·1 answer
  • The ozone layer is an important component of Earth’s atmosphere because it helps to block UV radiation from reaching Earth. The
    12·2 answers
  • A 1000.0 kg truck accelerates from 20.0 m/s to 25.0 m/s over a distance of 300.0 m. What is the average net force on the truck?
    9·1 answer
  • Dimensional formula of Amplitude ?​
    5·1 answer
  • 8. A unit used to measure a vector quantity is the...... a) Second b) gram c) Newton d) Kilogram​
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!