Which change would cause a sound wave to slow down? O A. The sound passes from air into a liquid. O B. The air the sound travels through warms up. o C. The air the sound travels through cools down. O D. The sound passes from air into a solid.​

Answer:

i cant see it

Explanation:

sorry maybe try to show us a different way?

The time required to crumple the barrier and safely slow down the person with a force of 1650 N is approximately C, 1.1 seconds.

To determine the time required to crumple the barrier and safely slow down the person with a maximum force of 1650 N, use the equation of motion:

F = m × a

where:

F = force

m = mass

a = acceleration

Given:

m = 68 kg

F = 1650 N

Find the acceleration (a) first. Rearranging the equation:

a = F / m

Substituting the values:

a = 1650 N / 68 kg

a ≈ 24.26 m/s²

Now, use the equation of motion to find the time (t):

v = u + at

where:

v = final velocity (0 m/s as the person comes to a stop)

u = initial velocity (27 m/s)

a = acceleration (24.26 m/s²)

t = time

Rearranging the equation:

t = (v - u) / a

Substituting the values:

t = (0 m/s - 27 m/s) / 24.26 m/s²

t ≈ -27 m/s / 24.26 m/s²

t ≈ -1.11 s

The negative sign indicates that the time is in the opposite direction to the initial velocity. Taking the absolute value, the time required to crumple the barrier and safely slow down the person with a force of 1650 N is approximately 1.11 seconds.

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100

Explanation:

cause 400-300 : 100 pray it's correct

2304 Newton  is the centripetal force exerted on a 1,600-kg car that rounds a 100-m curve at 12 m/s

centripetal force=mv^2/r

m=1,600-kg

v= 12 m/s

r= 100-m

centripetal force=mv^2/r

centripetal force=(1,600-kg×12 m/s×12 m/s)÷100-m

centripetal force=230400/100

centripetal force=2304 N

Any motion along a curved road is accelerated, necessitating the application of force to the path's center of curvature. Centripetal, which means "center seeking," is the name of this force.

The Centripetal Force Formula states that the centripetal force equals the product of mass (in kg) and tangential velocity (in meters per second) squared, divided by the radius (in meters). This formula predicts that the centripetal force will double with a doubling of tangential velocity.

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How to find g (acceleration due to gravity)

We know,

Acceleration due to gravity (g)

\( = \frac{GM}{ {R}^{2} } \)

where, G = Gravitational constant

\( = 6.67 \times {10}^{11} N {m}^{2}/k {g}^{2} \\ \)

M = Mass of the earth

\( = 6 \times {10}^{24} \: kg\)

R = Radius of the earth

\( = 6.4 \times {10}^{6} m\)

Putting these values of G, M and R in the above formula, we get

\(g \: = \: \frac{6.67 \times {10}^{11} N {m}^{2}/k {g}^{2} \times \: 6 \times {10}^{24} \: kg }{(6.4 \times {10}^{6}m {)}^{2} } \\ = 9.8m/ {s}^{2} \)

So, the value of acceleration due to gravity is

\(9.8m/s ^{2} \)

Hope it helps.

Do comment if you have any query.

Answer:

I have no clue what this means or what the answer is i am just trying to get my points up so i can ask questions

Explanation:

i am going to put something here so it looks like an explanation so yeah this has no meaning whatsoever i am very sorry that i am not able to give you the answer try looking the answer up im very very very very sorry :(

Answer:

The correct difference between chronic and acute stress is:

Acute stress is short-term, while chronic stress endures over time.

Explanation:

Acute stress refers to the immediate and temporary response of the body to a specific stressful event or situation. It is often characterized by a rapid increase in heart rate, heightened alertness, and the release of stress hormones like adrenaline. Acute stress is a normal and natural response to perceived threats or challenges, and once the stressor is removed or resolved, the body returns to its normal state.

On the other hand, chronic stress is long-term and persists over an extended period. It is typically caused by ongoing or recurring stressors, such as work pressures, financial difficulties, relationship problems, or chronic health conditions. Chronic stress can have a cumulative and prolonged impact on physical and mental well-being. It may lead to a range of health issues, including cardiovascular problems, weakened immune system, digestive disorders, anxiety, depression, and burnout.

Chronic stress is considered detrimental to overall health, while acute stress, when experienced in moderation, can actually be beneficial as it can enhance performance and help individuals deal with immediate challenges. It is important to manage chronic stress effectively through stress-reducing techniques, self-care practices, and seeking support when needed to prevent its negative consequences on health and well-being.

Answer:

huh

Explanation:

Answer:

Since the two forces are represented by Fap and For, we can assume that Fap refers to the force applied by your hand on the dog while petting it, and For refers to the equal and opposite force applied by the dog's body on your hand.

The diagram showing your hand petting a dog would look something like this:

```

____

/ \

/ \

/ D \

/ \

/____________\

H

```

In this diagram, the force Fap is represented by an arrow pointing from your hand towards the dog's body, and the force For is represented by an arrow pointing in the opposite direction, from the dog's body towards your hand.

We can describe the two forces as follows:

- Fap: The force applied by your hand on the dog's body while petting it.

- For: The equal and opposite force applied by the dog's body on your hand, according to Newton's third law of motion.

The gravitational force has an acceleration of 14.

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a. A high-pitch wave is characterized by a high frequency and a short wavelength. The frequency determines the pitch of the sound, with higher frequencies corresponding to higher pitches.

The wavelength is the distance between two consecutive peaks or troughs of the wave and is inversely proportional to the frequency. Therefore, a high-pitch wave has a shorter wavelength.

The amplitude of the wave, which is the height of the peak or the depth of the trough, is not directly related to the pitch of the sound, but it does determine the volume or intensity of the sound.

b. A high-volume wave is characterized by a high amplitude and a relatively long wavelength. The amplitude determines the volume or intensity of the sound, with higher amplitudes corresponding to louder sounds.

The wavelength of the wave does not directly affect the volume of the sound, but it can affect how the sound is perceived in different environments.

In general, longer wavelengths are more effective at traveling through obstacles such as walls and are better at penetrating long distances, whereas shorter wavelengths are more easily scattered and attenuated in the atmosphere.

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(a) 1MeV gamma rays in aluminum  ⟹ Compton effect  

(b) 100 keV gamma rays in hydrogen ⟹ Compton effect  

(c) 100 keV gamma rays in iron ⟹ Photoelectric effect  

(d) 10 MeV gamma rays in carbon ⟹ Compton effect  

(e) 10 mev gamma ryas in lead ⟹ Photoelectric effect  

The photoelectric effect has important applications in many areas, including solar cells and photocells, which convert light into electrical energy. It was first observed by Heinrich Hertz in 1887 and later explained by Albert Einstein in 1905. The energy of a photon (a packet of light) can be absorbed by an electron in the material, causing it to be emitted as a free electron.

The energy of the photon must be greater than the material's work function, which is the minimum energy required to remove an electron from the material. It also plays a crucial role in the development of quantum mechanics, as it was one of the key experiments that led to the understanding of the wave-particle duality of light.

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Answer:

yes !

Explanation:

a mirror transforms and flips , but nonetheless produces a real image.

Answer:

Explanation:

the answer is 35.6

lowest point in its swing is  12.478 cm/s.

Any pendulum, when positioned vertically, swings equally in both directions.

Assume that the swing's angle on either side is.

So, 2θ = 4.57°

Or, θ = 2.285°

Let v represent the pendulum's lowest point's linear speed.

The highest point of the pendulum is really h = l * (1 - cos ) vertical height above the lowest point of the swing when it reaches its maximum position.

h is therefore equal to (0.993 m) * (1 - cos 2.285°) (0.993 m) * (1 - 0.9992) = 0.0007944 m.

If m is the pendulum's mass, we can express the following using the rule of conservation of energy:

The highest point's potential energy is transformed into kinetic energy at the lowest location via height.

Therefore, m* g* h= (1 / 2)* m* (v2)

Or, v = √(2gh) (2gh)

v = ( 2 * 9.8 * 0.0007944) m/sec

v = 0.12478 m/sec

The correct answer is 12.478 cm/s.

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Answer: a . it decreases

Explanation:

The quantity of heat energy that must be transferred to 2.25 kg of brass to raise its temperature from 20 °C to 240 °C is 195030 J

First, we shall list out the given parameters from the question. This is shown below:

The quantity of heat energy that must be transferred can be obtained as follow:

Q = MCΔT

= 2.25 × 394 × 220

= 195030 J

Thus, we can conclude quantity of heat energy that must be transferred is 195030 J

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\(\omega = 21.8\:\text{rad/s}\)

Explanation:

We know that there are \(2\pi\) radians in one revolution and 60 seconds in one minute so we can easily convert the rev/min unit to rad/s using the following conversion factors:

\(208\:\dfrac{\text{rev}}{\text{min}}×\dfrac{2\pi\:\text{rad}}{1\:\text{rev}}×\dfrac{1\:\text{min}}{60\:\text{s}}\)

\(\;\;\;\;\;=21.8\:\text{rad/s}\)

The gauge pressure at point 2 is 98100 Pa or 9.81 x\(10^4\) Pa, which is equivalent to 6.97 x\(10^4\) Pa when rounded to two significant figures.

Step 1: Identification of the given data:

- Elevation at point 1 (h1) = 10.0 m

- Elevation at points 2 and 3 (h2 = h3) = 2.00 m

- Cross-sectional area at point 2 (A2) = 0.0480 \(m^2\)

- Cross-sectional area at point 3 (A3) = 0.0160 \(m^2\)

Step 2: Determination of the discharge rate:

As mentioned earlier, the discharge rate (Q) is given by Q = A2 * v2, and since the velocity at point 2 (v2) is negligible, the discharge rate will be 0.

Therefore, the discharge rate is 0 cubic meters per second.

Step 3: Determination of the gauge pressure at point 2:

To find the gauge pressure at point 2, we'll use Bernoulli's equation:

P1 + (1/2)ρ\(v1^2\) + ρgh1 = P2 + (1/2)ρ\(v2^2\) + ρgh2

Since the velocity at point 2 (v2) is negligible, the term (1/2)ρ\(v2^2\) can be ignored.

The equation simplifies to:

Patm + ρgh1 = P2 + ρgh2

We want to find the gauge pressure at point 2, so we'll subtract the atmospheric pressure (Patm) from P2:

\(P_g_a_u_g_e\) = P2 - Patm

Now let's substitute the given values into the equation:

\(P_g_a_u_g_e\) = (Patm + ρgh1) - Patm

\(P_g_a_u_g_e\) = ρgh1

Plugging in the values:

\(P_g_a_u_g_e\) = (1000 kg/m^3) * (9.81 \(m/s^2\)) * (10.0 m)

\(P_g_a_u_g_e\) = 98100 Pa

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If Stas is pushing his car which has broken down and does 3 KJ of work against friction and moves it a distance of 12m, the friction force is 250 N

W = F d

W = Work done

F = Force

d = Distance

W = 3 KJ = 3 * 10³ J

d = 12 m

F = W / d

F = 3 * 10³ / 12

F = 0.25 * 10³

F = 250 N

Therefore, the friction force he has to push against is 250 N

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Artificial isotopes are usually absent by nature because of their unstables nature . The Isotopes usually transit into a stable Isotopes. This Isotopes are produced artificially by bombarding an atom.

Artificially radioactive Isotopes produced from stable Isotopes are used in medicine and medical research. Therefore, the answer is True.

Answer:

This GPE calculator will find the missing variable in the physics equation for gravitational potential energy, when three of the variables are known.  

Explanation:

<3

What ever games your playing it wont work you cant defeat me hahhahha oh I know :O but he can AHHHH :D D: NOOOO IMPOSSIBLE.

Explanation:

The maximum height of an object, given the initial launch angle and initial velocity is found with:h=v2isin2θi2g h = v i 2 sin 2 ⁡ θ i 2 g .

The resistance of the electric device using a power of 650 watts is approximately 27.7 ohms.

Ohm’s law states that the potential difference between two points is directly proportional to the current flowing through the resistance.

Hence

V = IR

R = V/I

Where V is the voltage or potential difference, potential difference, I is the current and R is the resistance.

We need to first find the electric current I.

Note:

Power = Voltage × Current.

Hence:

Current I = Power/Votage

Plug in the values

I = 650 / 120

I = 13/3 A

Substituting the values of voltage and current intio the above formula, we can calculate the resistance:

R = V/I

R = 120 / (13/3)

R = 27.7 ohms

Therefore, the resistance is approximately 27.7 ohms.

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When sound waves spread out from two speakers, the circles represent crests of the spreading waves. The interference is constructive at 1, destructive at 2.

Constructive interference occurs when two waves meet and their amplitudes are added together. Constructive interference occurs when two waves with similar amplitude and frequency interfere with one another, resulting in a wave with a larger amplitude and longer wavelength than either of the original waves.

The destructive interference occurs when two waves meet and their amplitudes are subtracted. Destructive interference occurs when two waves with equal amplitude and frequency interact with one another, resulting in a wave with a smaller amplitude than either of the original waves.

At point 1, the interference is constructive. As the crests of the two waves coincide, the amplitude of the resulting wave is equal to the sum of the amplitudes of the individual waves.

At point 2, the interference is destructive because the crest of one wave coincides with the trough of the other wave, resulting in a wave with a smaller amplitude than either of the individual waves.

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Answer:

because

Explanation:

starts with question then explored through the mind.