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Sveta_85 [38]
3 years ago
10

What is the length of AC?

Physics
1 answer:
Grace [21]3 years ago
7 0
D: 16 AB is half of AC and since you’re given AB=8 to get the full length you just multiply it by 2
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For every force there is one that is ___________ in size but ______________ in direction.
Karolina [17]

Answer:

<h3>» equal , opposite</h3>

Explanation:

For every force there is one that is <u>equal</u><u> </u>

in size but <u>opposite</u> in direction.

<h3>because , </h3>

<h3>Newton's Third law states that</h3>

<h3>For every force, there is another force of equal magnitude, acting in the opposite direction.</h3>
4 0
3 years ago
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What does the diagram show about phases and the phase of the substance as it is heated? Check all that apply.
Romashka [77]

Answer:

2 and 4

Explanation:

right on edge

7 0
3 years ago
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A traveling wave has wavelength 0.50 m, speed 20 m/s. Find the wave frequency.
BigorU [14]
Frequency = (speed) / (wavelength) = 20 / 0.5 = 40 per second = 40 Hz. 
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3 years ago
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A mass attached to a spring oscillates in simple harmonic motion with an amplitude of 10 cm. When the mass is 5.0 cm from its eq
timama [110]

When the mass is 5.0 cm from its equilibrium point, the percentage of its energy that is kinetic is 75%.

<h3>Total energy of the mass</h3>

The total energy possessed by the mass under the simple harmonic motion  is calculated as follows;

U = ¹/₂kA²

where;

  • k is the spring constant
  • A is the amplitude of the oscillation
<h3>Potential energy of the mass at 5 cm from equilibrium point</h3>

P.E = ¹/₂k(Δx)²

<h3>Kinetic energy of mass</h3>

K.E = U - P.E

K.E = ¹/₂kA² - ¹/₂k(Δx)²

<h3>Percentage of its energy that is kinetic</h3>

K.E (\%) = \frac{U - P.E}{U} \times 100\%\\\\K.E (\%) =\frac{\frac{1}{2}kA^2 - \frac{1}{2}k(\Delta x)^2 }{\frac{1}{2}kA^2} \times 100\%\\\\K.E (\%) = \frac{A^2 - (\Delta x)^2}{A^2} \times 100\%\\\\K.E (\%) = \frac{10^2 - (10-5)^2}{10^2} \times 100\%\\\\K.E (\%) = \frac{10^2 - 5^2}{10^2} \times 100\%\\\\K.E (\%) = 75\%

Thus, when the mass is 5.0 cm from its equilibrium point, the percentage of its energy that is kinetic is 75%.

Learn more about kinetic energy here: brainly.com/question/25959744

3 0
2 years ago
A light beam travels at 1.94×108 in quartz. The wavelength of the light in quartz is 355 .Part AWhat is the index of refraction
Alja [10]

A) 1.55

The speed of light in a medium is given by:

v=\frac{c}{n}

where

c=3\cdot 10^8 m/s is the speed of light in a vacuum

n is the refractive index of the material

In this problem, the speed of light in quartz is

v=1.94\cdot 10^8 m/s

So we can re-arrange the previous formula to find n, the index of refraction of quartz:

n=\frac{c}{v}=\frac{3\cdot 10^8 m/s}{1.94\cdot 10^8 m/s}=1.55

B) 550.3 nm

The relationship between the wavelength of the light in air and in quartz is

\lambda=\frac{\lambda_0}{n}

where

\lambda is the wavelenght in quartz

\lambda_0 is the wavelength in air

n is the refractive index

For the light in this problem, we have

\lambda=355 nm\\n=1.55

Therefore, we can re-arrange the equation to find \lambda_0, the wavelength in air:

\lambda_0 = n\lambda=(1.55)(355 nm)=550.3 nm

4 0
4 years ago
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