3) discuss the difference in camouflage techniques of needlefish and toadfish discussed in the video. what does the camouflage technique used by each fish tell you about where it lives? looking at the cartoons below, what does the anatomy of each fish tell you about how it swims and how it feeds? be sure to answer these questions for both fish, needlefish and toadfish.

The planet Venus in the table has an average surface temperature closest to that of Earth.

The average surface temperature of Earth is approximately 15°C (59°F) and the average surface temperature of Venus is 460°C (860°F).

However, Venus is the closest in terms of temperature to Earth because it is the hottest planet in the Solar System, with an average surface temperature of 460°C (860°F), which is closer to Earth's temperature than any other planet.

Venus has a thick, toxic atmosphere that traps heat and causes a greenhouse effect, making it the hottest planet in the Solar System.

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The combined amplitude of two identical waves of amplitude 5 cm depends on whether the interference is constructive or destructive.

Constructive Interference: When two waves interfere constructively, their amplitude increases. In this scenario the combined waveform will have an amplitude equal to the sum of the individual amplitudes if the two waveforms are in phase (crest aligns with crest and trough aligns with trough). Consequently, in constructive interference, the amplitude of the combined wave will be 5 cm + 5 cm = 10 cm.

Destructive Interference : Interference that is destructive occurs when two waves interact in a way that cancels out each other's amplitudes. The amplitude of the combined waveform will be equal to the difference between the individual amplitudes in this case if the two waveforms are out of phase (peak aligned with trough). In destructive interference, the amplitude of the combined wave will be 5 cm – 5 cm = 0 cm.

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Answer:

the answer is D

Explanation:

To test the flow of electric current through a circuit we can use a lightbulb. If a current is generated the bulb will light with brightness. Thus, option D is correct.

An ammeter is an electric device used to measure the current through a circuit. The current in ampere, milliampere or microampere is recorded by the ammeter through the deflection of its needle.

A magnetic field is always associated with an electric field where, the fields will be right angled to each other. A moving magnet in turn causes an electric current like a moving charge make an electric current.

To light a bulb electrical energy is needed. Thus, we can  test the deflection in electric field using a a light bulb connected to the circuit. If there is a fine passage of electricity, the bulb will lighten. Thus, option D is correct.

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13954 Newtons of the saltwater will be displaced by the boat if it float on the saltwater.

The boat floating in the fresh water displaces 16000N.

We know, the weight of the liquid displaced by the boat is equal to the buoyancy of the boat.

So,

B = 16000N.

When the boat is put into the saltwater, its buoyancy will be,

B = Vpg

Where,

V is the volume of the saltwater displaced,

p is the density of the saltwater,

g is the acceleration due to gravity.

Putting values,

16000 = V(1.17)(9.8)

V = 1395.4 m³.

The weight of the saltwater will be,

Weight = 1395.4 x 10

Weight of the water displaced 13954 Newtons.

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Answer:

Aerial Velocity

Answer:

I'm not sure but I think it is electric currents in the outer core

Answer:

1.) Gas = Are the particles moving quickly in a radom pattern?

2.) Plasma = Are the particles electrically charged?

3.) Solid = Are the particles vibrating in a fixed position?

4.) Liquid = Are the particles sliding past each other?

Hope this helps!

Answer:

ballance

i just took the quiz

594 years older will a 500 year old tree be in 2.97 giga second from now in species of the African Baobab tree live for thousands of years.

First, we need to convert 2.97 giga seconds to years:
1 giga second = 1,000,000,000 seconds
2.97 giga seconds = 2.97 x 1,000,000,000 seconds = 2,970,000,000 seconds
To convert seconds to years, we divide by the number of seconds in a year:

African trees can be categorised into a number of categories based on their species or place of origin. The Sausage Tree, Quiver Tree, Acacia, Umbrella Thorn, Deadwood Tree, African Tulip Tree, and other varieties are only a few of the many varieties of African trees.

The reason the baobab is also referred to as the upside-down tree is that when it is without leaves, its spreading branches mimic roots that are ascending into the air, as if it had been planted upside-down. The baobab is a native of Africa and one of its most recognizable trees.

The significance of the African tree—also known as the "upside-down tree"—is as a result of the aforementioned.
1 year = 365 days x 24 hours x 60 minutes x 60 seconds = 31,536,000 seconds
2,970,000,000 seconds ÷ 31,536,000 seconds/year = 94.09 years
So in 2.97 giga seconds (which is roughly 94 years), a 500 year old African Baobab tree will be 594 years old.

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Answer:

70m/s

Explanation:

False. Marginal revenue is the additional revenue generated by selling one more unit of a product, while average revenue is the total revenue divided by the number of units sold.

If the marginal revenue is greater than the average revenue, it means that each additional unit sold is generating more revenue than the average. However, this does not necessarily mean that the average revenue will increase. It depends on the price elasticity of demand for the product. If demand is elastic, increasing the price to take advantage of the higher marginal revenue will result in a decrease in sales and therefore a decrease in average revenue.

On the other hand, if demand is inelastic, increasing the price may result in an increase in average revenue despite the decrease in sales volume. Overall, the relationship between marginal revenue and average revenue is complex and cannot be generalized.

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By using the emission spectra the following were found:

A) The element which has an emission spectra with these wavelengths is Strontium (Sr).

B) The element A above has a strong emission around 670 nm which would correspond to a red line.

C) The strong emission line around 570 nm corresponds to the frequency of 5.26 x 10^14 Hz.

A) The unknown sample contains an element whose emission spectra showed a strong emission at 610 nm and 480 nm but not at 670 nm. The element which has an emission spectra with these wavelengths is Strontium (Sr). The emission spectra of Sr has strong emission lines at 460 nm, 485 nm, and 610 nm. So, the high school student's unknown sample contains Strontium (Sr).

B) The element A above has a strong emission around 670 nm which would correspond to a red line. This is because the red color has the longest wavelength among all the colors of the visible spectrum. The wavelength of the red color is around 700 nanometers, and the wavelength of violet color is around 400 nanometers. As the wavelength of the red color is the longest, it is visible as a red line in the emission spectra.

C) As per the diagram given above, Element C has a strong emission line around 570 nm. We know that the speed of light is 3.0 x 10^8 m/s and frequency of light is given by the equation,

frequency = speed of light/wavelength

In order to find the frequency which corresponds to the wavelength of 570 nm, we need to convert the wavelength in meters.

1 nm = 1 x 10^-9 m

So, 570 nm = 570 x 1 x 10^-9 m = 5.7 x 10^-7 m

frequency = (3.0 x 10^8 m/s)/(5.7 x 10^-7 m) = 5.26 x 10^14 Hz

The strong emission line around 570 nm corresponds to the frequency of 5.26 x 10^14 Hz.

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Answer:

1. is B and 2. is A

Explanation:

Answer:

1. Displacement

2.  5 m/s  400 ÷ 80 = 5

Explanation:

Answer:

The answer is "Option D"

Explanation:

Please find the graph file in the attached file.

Using formula:

\(\to v= \rho \lambda \\\\\ \to \lambda= 130 \cm \\\\ \to v= 335 \frac{cm}{s}\\\\ \to \rho= \frac{v}{\lambda} \\\\\)

      \(=\frac{335}{130} \\\\ = 2.57 \approx 2.50 \ Hz\)

Answer:

The force of gravitation is 1.98×10^(20) m.

Explanation:

Note: The value of m1, m2, r, and G is taken to be 5.97×10^(24) kg, 7.348×10^(22) kg, 3.84×10^(8) m, and 6.67×10^(-11) N m^2/ kg^2 respectively.

The force of gravitation F acting between two masses is calculated using the formula,

F=Gm1m2/ r^2

where G is the gravitational constant.

Hence force F is

F=6.67×10^(-11)×5.97×10^(24)×7.348×10^(22)/ (3.84×10^(8))^2

F=1.98×10^(20) N

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Answer:

True

Radiometric dating is a process of identifying the age of a material based on known half-lives of decaying radioactive materials found in both organic and inorganic objects. Radiometric dating is often used to determine the age of rocks, bones, and ancient materials.

Answer:

false

Explanation:

Using Runge-Kutta 2nd order Heun's method, the speed (w) at t = 0.8s is approximately 0.0081.

Given:

Voltage input (V) = 30V

Initial speed (w) = 0

Step size (h) = 0.4s

Time at which speed is to be determined (t) = 0.8s

We need to determine the speed (w) at t = 0.8s using Heun's method.

We have k₁ = f(t₁, W₁) = 0.02 + 0.06w₁ (using the given equation)

At t = 0 and w = 0 (initial conditions), we have:

k₁ = 0.02 + 0.06(0) = 0.02

We have k₂ = f(t₁ + h, w₁ + k₁h) = 0.02 + 0.06(w₁ + 0.02h)

So, at t = 0.4s and w = 0 (initial conditions), we have:

k₂ = 0.02 + 0.06(0.02 * 0.4) = 0.02 + 0.00048 = 0.02048

So, W₂ = w₁ + (k₁ + k₂)(h/2)

   = 0 + (0.02 + 0.02048)(0.4/2)

   = 0.04048(0.2)

   = 0.008096

Therefore, using Runge-Kutta 2nd order Heun's method, the speed (w) at t = 0.8s is approximately 0.0081.

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The complete question is:

The speed of a motor supplied with a voltage input of 30V, assuming the system is without damping, can be expressed as 30 = (0.02)+(0.06)w dt If the initial speed is zero and a step size of h = 0.4 s, determine the speed w at t = 0.8 s by using the Runge-Kutta 2nd order Heun's method. Heun's method: Wi+1=W₁ = w₁ + (-/-^₁ + = -K ₂ ) h where, k₁ = f(t₁, W₁) and k₂ = f(t₁ + h, w₁ + k₁h), the speed (w) at t = 0.8s is approximately 0.0081.

Answer:

A

Explanation:

Answer: A

Explanation:

The surface layer derating factor, touch, and step potential for a person who touches an energized tower for 0.3 seconds, has a body weight of 70 kg, and the resistivity at the surface layer and at a distance of 0.3 m inside the soil are found to be 70 and 50 Q-m, respectively, are 0.64, 9.8 kV, and 8.1 kV, respectively.

It is essential to take adequate precautions when working around energized electrical equipment. Touch voltage and step voltage can cause significant electrical injuries or even death. Alexander weighs 70 kg and touches an energized tower for 0.3 seconds. The resistivity at the surface layer and 0.3 m inside the soil is 70 and 50 Q-m, respectively.

The derating factor for the surface layer is given by the formula:

k = (ρ_2/(ρ_1 + ρ_2 ))^0.5

k = (50/(70 + 50 ))^0.5

k = 0.64

The touch potential is given by the formula:

Vt = k × [(Rh+ Rg)/Rh] × Ve

Vt = 0.64 × [(2 + 110)/2] × 11 kV

Vt = 9.8 kV

The step potential is given by the formula:

Vs = k × [(Rh+ Rg)/(Rh+ 2Rg)] × Ve

Vs = 0.64 × [(2 + 110)/(2 + 2 × 110)] × 11 kV

Vs = 8.1 kV

Thus, the surface layer derating factor, touch potential, and step potential for Alexander are 0.64, 9.8 kV, and 8.1 kV, respectively.

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Answer:

24.4 m

Explanation:

sin 30 =  12.2 / x

x = 12.2 / sin 30    =  24.4 m

The distance covered by Mr. John is 24.4 meters.

An angle is a figure in Euclidean geometry made up of two rays that share a common terminal and are referred to as the angle's sides and vertices, respectively.

Angles created by two rays are in the plane where the rays are located. The meeting of two planes also creates angles. We refer to these as dihedral angles. The angle formed by the rays lying perpendicular to the two crossing curves at the point of junction is another property of intersecting curves.

Given parameters:

Height of the slide: h = 12.2 meters.

Angle of inclination of the inclined plane =  30°

Let the distance covered by Mr. John is x meters.

Then from trigonometry, we can write:

sinα = perpendicular/ hypotonias

sin 30° =  12.2 / x

x = 12.2 / sin 30°  

x = 24.4 meters

Hence, the distance covered by Mr. John is 24.4 meters.

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Answer: Airplanes fly because they are able to generate a force called Lift which normally moves the airplane upward.

Explanation:

Answer:

The thermosphere experiences a temperature increase primarily due to the absorption of gamma-rays and X-rays.

Hello. You did not present the photos to which the question refers, which makes it impossible for your question to be answered. However, I will try to help you in the best possible way.

Your question informs us that the photos are of a star-forming molecular cloud. The molecular cloud has dust, especially when the star is forming. In this case, we must keep in mind that in photos taken in visible light, the dust is able to appear, especially in space, where this dust would not reflect light, unlike the star in formation. In this case, we can conclude that in the case of the photo taken in visible light, we could see the molecular cloud as a dark spot, due to the dust. However, it would not be possible to view it in a photo taken with infrared light.

Answer:

umm the lower the frequency the higher the pitch

Explanation:

Gamma rays widely used in medical sector mostly in radio pathy and scientific research laboratories for sterilization.

Define gamma rays:

Electromagnetic energy which is emitted after disintegration or decaying of two different radioactive nuclei is considered as gamma rays.

Uses of gamma rays:

Gamma rays have high penetration power with particular matter and go through ionization process mostly by photoelectric effect. The impact of gamma rays can be hazardous upon human body due to high penetration and increases health risk.

Gamma rays mostly used for sterilization process which mostly use to destroy microorganism and sterilize the surgical equipment and different laboratory equipment. Food industries also use this ray to maintain quality and hygiene of food.

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I don't know sorry didn't make me want you say you didn't know how I feel about me being that way and that I didn't even want you say I was wrong and you didn't want me to be to have a good time

Answer:

its 2.9

Explanation:

Took the quiz

The race horse will take a time of 2.9 seconds to starts from rest and accelerates at rate of 4.7 m/s² to travel a distance of 20 m.

Acceleration is a physical quantity measuring the rate of change in velocity of a moving body. Acceleration is a vector quantity thus having both magnitude and direction.

The expression relating the distance travelled s , initial velocity , acceleration a and time t is written below:

s = ut + 1/2 at²

Here, the horse starting from rest and u = 0.

Given  a = 4.7 m/s²

s = 20 m

Then t = √(2 s/a)

t = √(2 × 20 m/ 4.7 m/s²) = 2.9 s

Therefore, the horse will take 2.9 seconds to accelerates from rest.

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