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3 years ago

Will mark brainliest HELP ASAP Atomic structure extension

Physics

1 answer:

Olenka [21]3 years ago

6 0

Answer:

Explanation:

atomic structure extension is very difficult to read but when done right you should get 23 yw

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A 15lb bowling ball and a 10 pound bowling ball are

emmasim [6.3K]

Same time
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3 years ago

1. Her angular speed increases because by pulling in her arms she creates a net torque in the direction of rotation. 2. Her angu

choli [55]

Answer:

3. Her angular speed increases because her angular momentum is the same but her moment of inertia decreases

Explanation:

II ωi the intial angular momentum of the skater. Her angular momentum changes to If ωf after pulling her arms in.

It must be noted that If is less than II, then it is because her arms now go round not far from the rotation axis which brings down the mementos of inertia.

Angular momentum does not change since torque is O.

Note: the mathematical representations are better written on the attached diagram.

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3 years ago

Read 2 more answers

The forces acting on a sailboat are 390. N south and 180. N east. If the boat (including

velikii [3]

Answer:

180^2 + 390^2 = force ^2 (Pythagoras) root of force^2 = 429.5N approx resultant force Acceleration = Force/Mass 429.5/270 = 1.5907 ms^-2 in a Southwesterly direction.

Explanation:

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3 years ago

For light of wavelength 589 nm, calculate the critical angles for the following substances when surrounded by air.

NeX [460]

(1) The critical angles for the fused quartz is 44⁰,

(2) The critical angles for the polystyrene is 39⁰.

(3) The critical angles for the sodium chloride is 41⁰.

<h3>What is Critical angles?</h3>

In optics, the critical angle is the topmost angle at which a shaft of light traveling in one transparent medium can strike the boundary between that medium and another with a lower refractive indicator without being fully reflected within the first

Critical angles for the different medium.

θ $=sin^{-1}\frac{n_{2} }{n_{1} }$

where;

$n_{2}$ is the refractive index of air = 1

$n_{1}$ is the refractive index of the given substances.

Refractive index of quartz glass = 1.46

Refractive index of polystyrene = 1.59

Refractive index of sodium chloride = 1.54

Critical angles for quartz glass:

$\theta_{\text {crit }}=\sin ^{-1} \frac{1.00029}{1.46}\\$

$\theta_{\text {crit }}=44^{o}$

Critical angles for polystyrene

$$\theta_{\text {crit }}=\sin ^{-1} \frac{1.00029}{1.59}\\\\$

$\theta_{\text {crit }}=39^{\circ}$

Critical angles for Sodium Chloride

$$\theta_{\text {crit }}=\sin ^{-1} \frac{1.00029}{1.54}\\$

$\theta_{\text {crit }}=41^{o}$

Thus, the critical angles for the quartz glass is 44⁰, the critical angles for the polystyrene is 39 ⁰ and the critical angles for the sodium chloride is 41⁰.

To know more about critical angle visit:
brainly.com/question/3314727

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I understand that the question you are looking for is:

"For light of wavelength 589 nm, calculate the critical angles for the following substances when surrounded by air.

(a) Fused Quartz

(b) Polystyrene

8 0

2 years ago

In a circuit with one 12.0 resistor, a current of 0.500 A is flowing. This circuit is powered by a single

Juliette [100K]

Answer:

6 V

Explanation:

In a circuit, the relationship between voltage, current and resistance is given by Ohm's law:

$V=RI$

where

V is the voltage

R is the resistance

I is the current

In this circuit, we have

$R=12.0\Omega$ is the resistance

I = 0.500 A

so we can find the voltage of the battery by using Ohm's law:

$V=(12.0 \Omega)(0.500 A)=6 V$

4 0

3 years ago