John flies directly east for 20km, then turns to the north and flies for another 10 km before dodging a flock of geese. what’s the distance and displacement?

The rate at which we receive the information from a spacecraft traveling at 0.94c is the same as the rate at which it is sending the information, which is 680 Hz.

This is because the speed of light is constant, regardless of the speed of the source.

The speed of light is an important factor in determining the rate at which information is received from an object traveling at a velocity close to that of light. This is because, according to Einstein's Theory of Relativity, the speed of light is the same for all observers in all reference frames. This means that, regardless of the speed of the source, the speed at which light travels is the same.

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Answer:

nuclear fusion plants are fossil fuels, if you are asking which of the following is a fossil fuel

Explanation:

Answer:

Power = 2940 Watts

Explanation:

Given the following data;

Mass = 60 kg

Height = 300 meters

Time = 1 minutes = 60 seconds

To find the power;

First of all, we would determine the potential energy possessed by the person due to height.

We know that acceleration due to gravity is equal to 9.8 m/s².

Potential energy can be defined as an energy possessed by an object or body due to its position.

Mathematically, potential energy is given by the formula;

\( P.E = mgh\)

Where,

P.E represents potential energy measured in Joules.

m represents the mass of an object.

g represents acceleration due to gravity measured in meters per seconds square.

h represents the height measured in meters.

Substituting into the formula, we have;

P.E = 60 * 9.8 * 300

P.E = 176400

Next, we find the power using the following formula;

Power = energy/time

Power = 176400/60

Power = 2940 Watts

Answer: it is incorrect because skepticism helps scientists recognize when ideas are not supported by evidence.

Explanation:

Skepticism is simply the understanding that there can be uncertainty when it comes to knowledge in certain areas.

From the question, we are informed that John doesn't think that skepticism should play an important role in the scientific process and that he says that skepticism interferes with scientific consensus.

The statement that best describes John's conclusion is that it is incorrect because skepticism helps scientists recognize when ideas are not supported by evidence.

Ray tracing is a method used in geometrical optics to understand the behavior of light rays as they interact with optical systems such as lenses and mirrors. By tracing the paths of light rays, we can analyze concepts such as the formation of images and the properties of lenses.

Converging lenses are thicker in the middle and cause parallel light rays to converge towards a focal point after passing through the lens. Diverging lenses, on the other hand, are thinner in the middle and cause parallel light rays to diverge as if they came from a focal point behind the lens.

Real images are formed when light rays converge and intersect, resulting in a physical image that can be projected onto a screen. Imaginary images, on the other hand, are formed when light rays appear to diverge and do not intersect, meaning the image cannot be projected.

By using ray tracing, we can determine the positions, sizes, and types (real or imaginary) of images formed by various optical systems, providing valuable insights into the behavior of light in geometrical optics.

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Answer:

True.

Explanation:

In biology, selective breeding is the mechanism by which certain traits or a combination of traits are consciously selected in animal breeding or plant breeding and cultivation. Artificial selection is seen as a counterpart to natural selection, the mechanism by which, in nature, individuals are selected who are better adapted to their natural environment. Both processes have the same genetic principles and background.  Man selects the individuals with the desired traits to produce progeny, making these traits more and more common.

The bottleneck event of the plants in an area results in secondary succession.

A bottleneck is an event that drastically reduces the population size of an organism. The bottleneck may be caused by various events, such as an environmental disaster, the hunting or habitat destruction that results in the deaths of organisms.

Secondary succession is a type of ecological succession in which plants and animals recolonize a habitat after a major disturbance such as a devastating flood, wildfire, landslide, lava flow, or human activity e.g., farming or road or building construction.

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Answer:

12 Neutrons

Explanation:

So the mass of sodium is 22.990. You round it up to get 23(as stated in the problem). So, what exactly is atomic mass?

Atomic Mass is the total amount of neutrons and protons added up to form a total mass. So when you subtract 23-11 you get 12 Neutrons.

Tip: Don't know if you need this but-

The neutrons and protons are typically close in number (unless it's an isotope). So say that you subtract and the numbers of protons and neutrons aren't close at all. Well if that's the case, it's probably wrong.

hope this helps!!

The angular frequency obtained is 3.76 × 10⁻⁷ rad/sec. The orbital period planet of the planet in Earth days is 193.51 days.

Given data:

Mass of the planet (m) = 7.15 × 10²⁴ kg

Mass of the star (M) = 1.95 × 10²⁹ kg

Radius of the orbit (r) = 5.95 × 10⁷ km

Orbital period is given by T = (2π) ÷ ω

we know that,

(GMm) ÷ (R)² = mω²R

ω = √(GM) ÷ R³

On substituting the value:

ω = 3.76 × 10⁻⁷ rad/sec

The time period is:

T = (2π) ÷ 3.76 × 10⁻⁷

T = 16719389.62 sec

Hence on converting from seconds to days the time period obtained is:

T = 193.51 days.

Therefore, The orbital period planet of the planet in Earth days is 193.51 days.

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The average atomic mass of siegelite is 235 amu .

The average atomic mass of siegelite can be calculated by taking the weighted average of the atomic masses of its two isotopes, siegelite-220 and siegelite-250. To do this, we need to know the atomic masses of each isotope and their relative abundances. Given that the two isotopes are present in equal amounts in nature, we can assign a relative abundance of 0.5 to each isotope. The atomic mass of siegelite-220 is 220 amu, while the atomic mass of siegelite-250 is 250 amu. Using these values and the relative abundances, we can calculate the average atomic mass of siegelite as follows

Average atomic mass = (0.5 * 220 amu) + (0.5 *250 amu) = 235 amu
Therefore, the average atomic mass of siegelite is 235 amu. This value represents the weighted average of the masses of the two isotopes, taking into account their relative abundances. Knowing the average atomic mass of an element is important for understanding its chemical properties and behavior.

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Answer:

As you may or may not have guessed absolute devastation.

Explanation:

(although it depends on the size.)

For reference the asteroid the hit the plant 3.26 billion  years ago it was hugely devastating and wiped out more than half of life on earth.

Simply put Small chance of human survival today.

However, On a much brighter note there are studies being done right now to see if there is a way to stop that from possibly from happening again in the future or slow it down when it happens, change it's trajectory from the earth, absolutely demolish it to smithereens and etc.  

When the ball is at the highest point of the circle its velocity and acceleration directions are: B. ←V ↓a.

In Science, an acceleration can be defined as the rate of change of velocity of an object with respect to time.

In Science and Mathematics, velocity can be defined as the distance covered by an object per unit of time in a specific direction.

This ultimately implies that, velocity and acceleration are vector quantities because they have both magnitude and direction.

In this context, we can reasonably infer and logically deduce that the velocity of the ball would be towards the left direction while its acceleration be downward as shown below;

←V ↓a.

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Missing information:

The question is incomplete and the complete question is shown in the attached picture.

The phase of the moon when the moon is on the opposite side of the earth from the sun is the full moon. This happens when the sun, earth, and moon are aligned, with the earth in the middle.

The full moon appears when the sun’s light reflects off the entire surface of the moon, making it appear completely illuminated from our perspective on earth.Therefore, option A is the correct answer: The full moon.

When the moon is on the opposite side of the Earth from the sun, it is in the full moon phase. During this phase, the sun illuminates the entire side of the moon facing the Earth, making it appear fully lit and round. This occurs because the sun, Earth, and moon are aligned in a straight line, with the Earth in the middle. The full moon phase is characterized by a bright, round shape and is often considered the most visually striking lunar phase. It occurs approximately once every 29.5 days as the moon orbits around the Earth.

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The statement true for electromagnetic waves is:

B. Electromagnetic waves are created by moving charged particles.

A. Electromagnetic waves do not require a material medium to travel through. They can propagate through empty space as well as through materials, which is one of their defining characteristics.

B. This statement is correct. Electromagnetic waves are generated by the acceleration or oscillation of charged particles. Examples include light waves produced by the acceleration of electrons in atoms or radio waves generated by the oscillation of electrons in antennas.

C. This statement is incorrect. All electromagnetic waves, regardless of their frequency or wavelength, travel at the same speed in a vacuum, which is the speed of light (approximately 299,792,458 meters per second).

D. This statement is incorrect. The frequency of an electromagnetic wave is inversely proportional to its wavelength. Higher frequency waves have shorter wavelengths, while lower frequency waves have longer wavelengths. Therefore, the longest-wavelength waves have the lowest frequency, not the highest frequency.

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Answer:

The right solution is "2.5 m/s²". A further explanation is given below.

Explanation:

The given values are:

Initial velocity,

= 20 m/s

Final velocity,

= 0 m/s

Time,

= 8 s

As we know,

⇒  \(Acceleration=\frac{Final \ velocity-Initial \ velocity}{2}\)

On substituting the values, we get

⇒                       \(=\frac{0-20}{8}\)

⇒                       \(=\frac{-20}{8}\)

⇒                       \(=-2.5 \ m/s^2\)

The air pressure calculated using barometric formula at an elevation of 2000 meters is 0.068 MPa if the air pressure at sea level is 0.1 MPa.

Air pressure =  0.1 MPa

Elevation height = 2000 meters

The barometric formula is used to calculate the air pressure at an elevation of 2000 meters. Here the atmospheric pressure decreases when the elevation increases. The barometric formula is:

P = P₀ * exp(-M * g * h / (R * T))

P = pressure of altitude

P₀ = pressure at sea level

M = molar mass of Earth's atmoshpere = 0.02896 kg/mol

g =  acceleration due to gravity = 9.8 m/s²

h =  altitude height = 2000 m

R = ideal gas constant = 8.314 J/(mol·K)

T =  temperature of the air at a constant.

Substituting the values:

P = 0.1 MPa * exp(-0.02896 kg/mol * 9.8 m/s² * 2000 m / (8.314 J/(mol·K) * T))

T = 293K

P = 0.1 MPa * exp(-0.02896 kg/mol * 9.8 m/s² * 2000 m / (8.314 J/(mol·K) * 293 K))

P = 0.1 MPa * exp(0.2929808 / (8.314 J/(mol·K) * 293 K))

P =  0.1 MPa * exp(0.2929808 / 2436.002))

P  = 0.068 MPa

Therefore, we can conclude that the air pressure at an elevation of 2000 meters is 0.068 MPa.

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Answer:

To summarize, potential energy is the energy that is stored in an object due to its position relative to some zero position.

Explanation:

An object possesses gravitational potential energy if it is positioned at a height above (or below) the zero height.

Density is a measure of how much mass is contained within a given volume.  An object with a density of 1000 kg/m³ is denser than an object with a density of 1 g/cm³.

Density is a measure of how much mass is contained within a given volume. The formula for density is mass divided by volume (ρ = m/V). In the metric system, density is commonly expressed in kilograms per cubic meter (kg/m³) or grams per cubic centimeter (g/cm³).

Comparing the given densities, we can see that 1 g/cm³ is equivalent to 1000 kg/m³ since there are 1000 grams in a kilogram and 1 cubic meter is equal to 1,000,000 cubic centimeters. Therefore, the object with a density of 1000 kg/m³ has a higher mass per unit volume compared to the object with a density of 1 g/cm³.

This means that for the same volume, the object with a density of 1000 kg/m³ contains more mass, making it denser than the object with a density of 1 g/cm³. In simpler terms, if you were to compare objects of the same size, the object with the higher density would feel heavier because it has more mass packed into the same amount of space.

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Copper-nickel (Cu-Ni) alloys are high-strength and corrosion-resistant alloys that are used in a wide range of applications, including electrical applications. The electrical conductivity of a Cu-Ni alloy is dependent on a variety of factors, including the alloy composition, temperature, and mechanical properties, such as the yield strength.A Cu-Ni alloy that has a yield strength of 140 MPa may have a different electrical conductivity compared to another Cu-Ni alloy that has a different yield strength.

However, in general, Cu-Ni alloys are known for their high electrical conductivity, with electrical conductivity values ranging from 7 to 45% International Annealed Copper Standard (IACS).Cu-Ni alloys have excellent electrical conductivity because copper is an excellent conductor of electricity, while nickel improves the alloy's resistance to corrosion and oxidation. Additionally, Cu-Ni alloys have good thermal conductivity, making them useful in applications where heat transfer is necessary. Overall, determining the electrical conductivity of a Cu-Ni alloy requires an understanding of the specific alloy's composition, temperature, and mechanical properties. However, in general, Cu-Ni alloys are known for their high electrical conductivity and are used in many electrical applications.

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when the velocity and acceleration of an object have opposite signs, the speed of the object increases, is true statement.

Velocity is a vector quantity that represents the rate of change of an object's position with respect to time, including both the speed and direction of motion. It is defined as the derivative of position with respect to time. Acceleration and velocity are closely related quantities in mechanics. Acceleration is defined as the rate of change of velocity over time. In other words, acceleration is the derivative of velocity with respect to time. When an object's velocity is increasing, its acceleration is positive, and when its velocity is decreasing, its acceleration is negative. If an object is moving at a constant velocity, its acceleration is zero.

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By using the projectile motion concepts, we can calculate, total time the ball is in the air = 3.06 seconds.

According to the projectile motion, we have

S = ut + (1/2) a \(t^{2}\)

where s is the distance and u is the initial velocity and a is the acceleration and t is the time taken.

now putting the values we get

0 = 15* t + 0.5 * -9.8 *      \(t^{2}\)

15 x t = 4.9  \(t^{2}\)

or we can write

t = 15/4.9

t = 3.06 s

Hence the total time taken during the ball going up and down is 3.06 second.

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Answer:

6.3 m/min

Explanation:

Circumference of a circle = 2πr

r = D/2 = 40m/2 = 20m

C = 2π(20m) = 125.7 m

speed = distance/time = (125.7 m) / (20  min)  = 6.3 m/min

Answer:

1) Acids have a sour taste , Bases have a bitter taste.

2) Acids turn blue litmus paper into red , Bases turn red litmus paper into blue.

3) Acids react with most metals to form Hydrogen gas but only a few base react with a few metals to form Hydrogen gas

4) Both will conduct electricity. Both acids & bases are good electrolytes. Strong acids & bases conduct more electricity than that of weak acids & bases

Fill in the blanks with the properties of acids and bases as follows:

The properties of acids are as follows:

Therefore, fill in the blanks with the properties of acids and bases are well described above.

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Answer:

teleportation (artificial or natural over wormholes )

Answer:

Explanation:

See attachment.

Decreasing the mass of the objects   No.  Force will change.

Increasing the temperature of the objects Yes,  No change in force (at most a very small change if the heat causes excessive expansion, reducing the distance, although 1/2 will be further apart)

Increasing the distance between the objects No.  Force will change.

Decreasing the distance between the objects  No.  Force will change.

Answer:

However, to mention a few, there are other units of speed such as meters per second, feet per second, light-years per millennium, and knots. Feet per second, but specially meters per second are usually used to measure speed of animals, humans, and free fall objects. Knots is used to measure the speed of ship and/or boats.

Explanation:

B. STATIC ELECTRICITY

IS THE CORRECT ANSWER.

JUST FOR MORE KNOWLEDGE ,,...

EVERY ATOM OF MATTER HAS ELECTRONS , AND THESE ELECTIONS HAVE NEGATIVE ELECTRIC CHARGE WHEN YOU RUB TWO OBJECTS TOGETHER, YOU CAN CAUSE THESE CHARGES TO MOVE FROM ONE OBJECT TO ANOTHER .THIS PULLING FORCE BETWEEN UNLIKE CHARGES IS CALLED STATIC ELECTRICITY .