All categories

3 years ago

Anyone know how to do this?

Physics

1 answer:

MrMuchimi3 years ago

7 0

The voltage from one side of the battery all the way around to the other side of the battery is 12v .

If 4 of those volts show up across the circle-thing, then the rest of the 12v ... 8v ... Must show up across the set of parallel rectangles.

To get that answer, I subtracted the 4 from the 12.

Just like it says in choice-C.

You might be interested in

A balloon filled with helium gas has an average density of rhob = 0.27 kg/m3. The density of the air is about rhoa = 1.23 kg/m3.

8_murik_8 [283]

Answer: $34.84 m/s^2$

Explanation:

Given

density of balloon $\rho _{He}=0.27 kg/m^3$

density of air $\rho _a=1.23 kg/m^3$

volume of balloon $V=0.084 m^3$

If balloon is rising then

$F_b-mg=ma$

where $F_b=buoyant\ Force=\rho _a\times V\times g$

$mg=\rho _{He}\times V\times g=weight of gas$

$a=acceleration$

$\rho _a\times V\times g-\rho _{He}\times V\times g=\rho _{He}\times V\times a$

$\rho _a\times g-\rho _{He}\times g=\rho _{He}\times a$

divide by $\rho _{He}$

$\frac{\rho _a}{\rho _{He}}\times g-g=a$

$a=g(\frac{\rho _a}{\rho _{He}}-1)$

$a=g(\frac{1.23}{0.27}-1)$

$a=3.55\times 9.8$

$a=34.84 m/s^2$

3 0

3 years ago

Helppppp pleaseeee 25 points please?????

Sedbober [7]

Answer:

Where is question 12, we need it to answer this question

Explanation:

6 0

3 years ago

A rock is dropped in a pond, causing circular ripples. The radius increased with a rate 1 foot per second. When the radius is 4

Brrunno [24]

Answer:

true

Explanation:

Area = πr²

Differentiating in respect to r

we get,

dA/dr = 2πr

using chain rule,

$\frac{dA}{dt} = \frac{dA}{dr} .\frac{dr}{dt} = 2\pi \frac{dr}{dt}$

since r = 4feet

so ,

2π(4) = 8π

5 0

3 years ago

007 (part 1 of 2) 1.0 points

levacccp [35]

Answer:

a) The angle of refraction is approximately 34.7

b) The angle the light have to be incident to give an angle of refraction of 90° is approximately 53.42°

Explanation:

According to Snell's law, we have;

$\dfrac{n_1}{n_2} = \dfrac{sin (\theta_2)}{sin (\theta_1)}$

The refractive index of the glass, n₁ = 1.66

The angle of incident of the light as it moves into water, θ₁ = 27.2°

a) The refractive index of water, n₂ = 1.333

Let θ₂ represent the angle of refraction of the light in water

By plugging in the values of the variables in Snell's Law equation gives;

$\dfrac{1.66}{1.333} = \dfrac{sin (\theta_2)}{sin (27.2^{\circ})}$

$sin (\theta_2) = sin (27.2^{\circ}) \times \dfrac{1.66}{1.333} \approx 0.5692292265$

θ₂ = arcsin(0.5692292265) ≈ 34.7°

The angle of refraction of the light in water, θ₂ ≈ 34.7°

b) When the angle of refraction, θ₂ = 90°, we have;

$\dfrac{1.66}{1.333} = \dfrac{sin (90^{\circ})}{sin (\theta_1)}$

$sin (\theta_1) = \dfrac{sin (90^{\circ})}{\left( \dfrac{1.66}{1.333}\right)} = sin (90^{\circ}) \times \dfrac{1.333}{1.66} \approx 0.803$

θ₁ ≈ arcsin(0.803) ≈ 53.42°

The angle of incident, θ₁, that would give an angle of refraction of 90° is θ₁ ≈ 53.42°

3 0

3 years ago

How does the speed of light in glass depends on the frequency

Naddik [55]

Answer:

Frequency is of light depends upon the body that emits it. While wavelength depends on the medium through which it travels in vacuum the product of wavelength and frequency is the same while in other mediums the light of higher wavelength travels faster besed on refractive index. So light velocity depends on both frequency and wavelength.

Explanation:

6 0

4 years ago