1. Which of the following would have the highest vapor pressure at 25^{\circ} {C} ? a. {C}_{4} {H}_{10} b. {NaCl} c. {C}_{6} {H}_{12} \ma

Answer:

B. 2 m/s

Explanation:

With all collisions, momentum is conserved. This is known as the Conservation of Momentum.

To find the momentum of an object, multiply its mass by its velocity.

\(m_yv_y+m_ov_o=(m_y+m_o)v_f\), solving for vf

Plugging in numbers, we get:

\(100\cdot 8 + 200(-1)=(100+200)v_f\)

\(300v_f=600,\\v_f=\boxed{2\text{ m/s}}\)

The new angular distance the disk rotates is twice the original amount.

The solution is double the original amount because all you did was double the torque by two. The force that may cause an item to revolve along an axis is measured as torque. Similar to how force accelerates an item in linear kinematics, torque accelerates an object in an angular direction. A vector quantity is a torque. The force acting on the axis determines the direction of the torque vector.

At first the torque is τ and after that the torque become twice and that is why the angular distance of the disk rotates also get twice to the original angular distance.

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Answer:

Double

Explanation:

Assuming that the system is initially at rest, if you double the torque while keeping the time period constant, the angular displacement will also double.

This can be explained by the equation of motion for rotational motion:

Δθ = (1/2) * α * t^2

where θ is the angular displacement, α is the angular acceleration, and t is the time period.

Torque is related to angular acceleration through the equation:

τ = I * α

where τ is the torque, and I is the moment of inertia.

If you double the torque while keeping the moment of inertia and time period constant, the angular acceleration will double as well (because of the arrow method).

Therefore, let's look at the equation.

Δθ = (1/2) * α * t^2

If α is doubled, then Δθ will also be doubled.

I hope this helped!

The type of asteroid that would appear darkest and reflect the least light is type option E) S.

Among the given options, type E) S asteroids would appear darkest and reflect the least amount of light. Asteroids are classified into different types based on their composition, and type S asteroids belong to the silicate group. They are made up of rocky materials, such as silicates and metals, and they tend to have a relatively low albedo.

Albedo refers to the amount of light an object reflects, and a low albedo means that the object absorbs more light than it reflects. As a result, type S asteroids appear darker because they absorb a significant portion of the incident light rather than reflecting it. Their dark appearance is due to their composition and surface properties.

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The circulatory system carries oxygen, nutrients, and hormones to cells they remove waste products, like carbon dioxide. These roadways travel in one direction only, to keep things going where they should. :)

Given 16 kg of a radioactive sample with a certain half-life of 15 years:

To determine how much of the 16 kg radioactive sample is left after 60 years with a half-life of 15 years, we will use the following steps:

1. Calculate the number of half-lives that have passed: 60 years / 15 years per half-life = 4 half-lives
2. Calculate the remaining sample amount using the formula: remaining amount = initial amount * (1/2)^number of half-lives
3. Apply the formula: remaining amount = 16 kg * (1/2)^4 = 16 kg * 1/16 = 1 kg

After 60 years, 1 kg of the radioactive sample is left. The correct answer is D. 1kg.

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The velocity of the ball just before it hits the ground can be calculated using the formula v = g * t, where v is the velocity, g is the acceleration due to gravity (approximately 9.8 m/s^2), and t is the time taken to reach the ground.

In this case, the time taken by the ball to strike the ground is given as 3.5 seconds. The acceleration due to gravity remains constant at 9.8 m/\(s^2\)throughout the motion of the ball. By substituting these values into the formula, we can calculate the velocity.

v = g * t
  = 9.8 m/\(s^2\) * 3.5 s
  = 34.3 m/s

So, the velocity of the ball just before it hits the ground is 34.3 meters per second.

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Wrong answers:

A and B both state that solids are fluid while gases are not, while in reality, it is the opposite. Gases are fluid while solids are not.

C states the inverse of D, so C is incorrect.

Correct answer:

D. Solids have low energy levels and gases have high energy levels

This is because matter is in gas form when the temperature is higher and when the matter has absorbed more heat. More heat means more energy, so gases contain more energy than solids.

Matter, or "stuff", can be in multiple states, such as solid and gas.

The state of matter depends on how much energy the matter has absorbed.

Matter becomes a gas as more energy is added, and becomes a solid as more energy is removed.

This makes sense, because the individual molecules in a solid don't move as much, while the molecules in a gas move around quite a lot.

This makes gases easier to move around and change shape than solids.

Generally, as matter absorbs more heat and turns from solid to liquid to gas, the matter expands, and takes up more space.

This is because the more energy matter has, the more the molecules move and vibrate around, meaning they need more space to do so, so they expand.

The mass of the coin will decrease after the electrons are transferred and it will decrease by a percentage of -

[- (n x 9.1 x 10⁻³¹) / m] x 100 

We have a Penny (Coin) from which some electrons are transferred

We have to determine by what percentage do the transferred electrons change the mass of the penny.

The sufficiency or deficiency of electrons leads to the development of charge.

According to the question -

Assume the mass of penny when no electrons are transferred is m kg.

Now, suppose you rubbed the coin against your hand and the coin lost some of its electrons. Let this number be n. Now, the mass of electron is 9.1 × \(10^{-31}\) kilograms.

The total mass in kilograms lost will be -  

(n x 9.1 × 10⁻³¹) Kg

Therefore - the total mass of coin after loosing electrons will be →

m - (n x 9.1 × 10⁻³¹ ) Kg

There will be decrease in the mass of the penny. The amount of decrease in mass will be → final mass - initial mass =

m - (n x 9.1 × \(10^{-31}\)) - m = - (n x 9.1 × \(10^{-31}\)).

This negative sign indicates that the mass has decreased.

Hence, the mass of the coin after transferring the electrons will decrease and it will decrease by percentage of →

[- (n x 9.1 x 10⁻³¹)/m] x 100    

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René Descartes (1596-1650) was a creative mathematician of the first order, an important scientific thinker, and an original metaphysician.

Willebrørd Snell (1591-1626) was a Dutch astronomer, mathematician, and scientist who is famously known for the law of refraction.

Johannes Kepler (1571-1630) was a German astronomer, mathematician, astrologer, natural philosopher, and writer of music.

Galileo Galilei (1564-1642) was an astronomer, physicist, and mathematician who made fundamental contributions to the sciences of motion and astronomy.

Notice that the period of Descartes and Snell overlap with the period of Kepler and Galileo.

Therefore, we can conclude that the given statement is true.

Let's first resolve the two forces into their components as shown in the diagram below: The larger force (617 N) makes an angle of 46° with the horizontal axis.

Therefore, the horizontal component will be given by:

H = 617 cos 46°H = 617 × 0.69H = 425.73 N

The vertical component will be given by:V = 617 sin 46°V = 617 × 0.73V = 450.66 NOn the other hand, the smaller force (411 N) makes an angle of (90° - 46°) = 44° with the horizontal axis. Therefore, the horizontal component will be given by:H = 411 cos 44°H = 411 × 0.72H

= 296.52 N

The vertical component will be given by:V = 411 sin 44°V = 411 × 0.67V = 274.47 N The resultant horizontal component, R will be given by:R = 425.73 + 296.52R = 722.25 N The resultant vertical component, R will be given by:R = 450.66 + 274.47R = 725.13 N The magnitude of the resultant, R will be given by:R² = (722.25)² + (725.13)²R = √(522198.06)R = 722.82 N The angle that R makes with the larger force (617 N) will be given by:θ = tan⁻¹(725.13/722.25)θ = 45.23° Therefore, the magnitude of the resultant is 722.82 N and it makes an angle of 45.23° with the larger force.

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The bearing stress in this scenario is 2 kN/mm². To calculate the bearing stress, we need to use the formula:
Bearing Stress = Load / Contact Area

Substituting the given values:
Bearing Stress = 10 kn / 5 square mm
Bearing Stress = 2 N/mm^2

It is important to note that bearing stress is a measure of the force per unit area exerted on the contact surface between two components. In this case, the load is distributed over an area of 5 square mm, resulting in a bearing stress of 2 N/mm^2. It is important to ensure that the bearing stress is within the allowable limits to prevent failure or damage to the components.

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The repeated flying into the air and landing on the same spot reinforces to the woodcock that this is the center of its territory.

The phrase "Woodcock sky dances" refers to the woodcock's breeding routine. It is a migratory bird that mates in the United States' Eastern and Central regions. Woodcock "sky dances" or courtship flights, which are a part of its breeding ritual, are familiar to ornithologists and bird lovers.The male woodcock prepares for the display by choosing a place and then creating a tiny opening in the trees or shrubs. It flies into the air at sunset or sunrise, calling out with a distinctive chirping sound. It then lands on the same spot, with each flight being more extensive than the last. The woodcock does this repeatedly, with each flight reaching a greater height than the previous one.

The woodcock's territory is at the center of its sky dancing. The repeated flying into the air and landing on the same spot reinforces to the woodcock that this is the center of its territory. During the breeding season, the woodcock's sky dancing activity is essential. It shows off the male's strength and agility to female woodcocks, which aids in their selection of mates.The woodcock's behavior is a result of natural selection. Through sky dancing, the woodcock's species has developed its breeding ritual over thousands of years. The ability to perform sky dances is an evolutionary benefit to the woodcock, as it aids in species reproduction and survival. Therefore, repeatedly flying into the air and landing on the same spot reinforces to the woodcock that this is the center of its territory.

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The value that separates a rejection region from a non-rejection region is called the critical value.

In statistical hypothesis testing, we often perform tests to determine if a given claim about a population is true or false. We compare a sample statistic against a null hypothesis using a test statistic, the critical value is a threshold that helps us decide whether to reject or not reject the null hypothesis. The critical value is determined based on the chosen significance level (commonly denoted as α) and the probability distribution of the test statistic. The significance level represents the probability of making a Type I error, which occurs when we incorrectly reject a true null hypothesis. The critical value acts as a boundary between the rejection and non-rejection regions, providing a benchmark for the test statistic.

If the test statistic falls within the non-rejection region (i.e., it is less extreme than the critical value), we do not have enough evidence to reject the null hypothesis. However, if the test statistic falls within the rejection region (i.e., it is more extreme than the critical value), we reject the null hypothesis, favoring the alternative hypothesis. In this way, critical values play a crucial role in hypothesis testing, enabling researchers to make informed decisions based on the results of their analyses. The value that separates a rejection region from a non-rejection region is called the critical value.

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Answer:

The first option- Sun shining through clouds

Explanation:

Answer:

Jo

Explanation:

irradiating food doesn't make it radioactive (that's contamination) and beta particles are stopped by aluminium foil or thin metals, so it may not pass through thick packaging (usually gamma is used to irradiate foods as it can pass through the packaging)

The bird travels a total distance of 92 km. When the two trains are 46 km apart, the bird starts flying from one train toward the other train.

Let's assume that the distance between the bird and the first train is x km. Since the bird is flying towards the other train at a speed of 46 km/h and the trains are moving towards each other at a combined speed of 46 km/h, the relative speed of the bird with respect to the first train is

69 km/h (46 km/h + 23 km/h).

Therefore, it takes the bird x/(69 km/h) hours to reach the second train.

During this time, the two trains move towards each other and reduce the distance between them by

Therefore, the distance between the bird and the second train is also x km. Now, the bird starts flying towards the first train at the same speed of 46 km/h. Again, it takes the bird

hours to reach the first train.

During this time, the two trains move towards each other and reduce the distance between them by another x/3 km. Therefore, the total distance traveled by the bird in one round trip is 2x km.

Since x + x/3 + x/3 = 92 km (the initial distance between the trains)

the total distance traveled by the bird in all the round trips is

2(92 km) = 184 km.

However, since the bird only flies halfway towards each train before turning back, the actual distance traveled by the bird is half of 184 km, which is 92 km.

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Answer:

200j

Work Done=Wieght×Speed

10×20

Answer:

Given,

Object distance, u=25cm

Focal length, f=20cm

From mirror formula

f

1

​

=

v

1

​

+

u

1

​

−20

1

​

=

v

1

​

−

25

1

​

⇒

v

1

​

=−

20

1

​

+

25

1

​

v=100cm

The image will be real, inverted magnified

Explanation:

Given,

Object distance, u=25cm

Focal length, f=20cm

From mirror formula

f

1

​

=

v

1

​

+

u

1

​

−20

1

​

=

v

1

​

−

25

1

​

⇒

v

1

​

=−

20

1

​

+

25

1

​

v=100cm

The image will be real, inverted magnified

When an object is positioned close to the focal point of a converging lens, a virtual image is created. Its image is magnified & upright for such a posture.

Despite not being officially acknowledged or confirmed, a virtual tyrant in essence or effect. A: occurring or existing mostly online virtual purchasing. 2: being “ on ” or “ simulated on the a computer or a computer network printed or digital books a virtual keyboard.

When we frequently use the word "virtual," we generally mean online, that is, via a computer or other device. We use it to describe any communication that does not occur in a face-to-face physical setting.

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Answer:

use the following formulas;

Explanation:

V/T = constant. or

V1/V2 = T1/T2

The maximum height achieved by the cannonball above the ground is approximately 24.14 meters.

To find the maximum height achieved by the cannonball, we can analyze its motion using the principles of projectile motion.

Given:

Initial velocity (v₀) = 35 m/s

Launch angle (θ) = 50 degrees

Acceleration due to gravity (g) = 9.8 m/s²

The motion of the cannonball can be divided into horizontal and vertical components.

Vertical motion:

The initial vertical velocity (v₀y) can be calculated using the launch angle:

v₀y = v₀ * sin(θ)

The time taken to reach the maximum height (t_max) can be determined using the equation:

t_max = v₀y / g

Using this time, we can find the maximum height (h_max) reached by the cannonball above the ground using the equation:

h_max = (v₀y)² / (2 * g)

Substituting the given values:

v₀y = 35 m/s * sin(50°)

t_max = (35 m/s * sin(50°)) / 9.8 m/s²

h_max = [(35 m/s * sin(50°))^2] / (2 * 9.8 m/s²)

Calculating these expressions gives us:

v₀y ≈ 27.01 m/s

t_max ≈ 1.46 s

h_max ≈ 24.14 m

Therefore, the maximum height achieved by the cannonball above the ground is approximately 24.14 meters.

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The force on a positive charge is arbitrarily chosen as the direction of the electric field since an electric field has both magnitude and direction.

The direction of the force acting on a negative charge is the exact opposite of the direction acting on a positive charge. The electric field surrounding a single positive charge is directed radially outward because positive charges resist one another.

Electric fields are typically shown as lines of force or field lines, which begin on positive charges and end on negative charges. A field line's tangent line shows the direction of the electric field there.

The electric field is stronger where the field lines are near together than it is farther apart. Depending on how the charge is distributed in an electric field, which is believed to be the source of the electric field, the size of the electric field around the source.

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The centripetal acceleration is the ratio of the tangential speed and the

radius of the shell.

The tangential speed of the part of the shell is approximately 0.12961 m/s

Reasons;

The widest diameter of the egg, d = 12 cm = 0.12 m

The given centripetal acceleration, \(a_c\) = 0.28 m/s²

Required:

The tangential speed of the bird.

Solution;

\(\displaystyle Centripetal \ acceleration, \ a_c = \mathbf{\frac{v^2}{r}}\)

Where;

\(\displaystyle r = The \ radius \ of \ the \ egg \ shell = \frac{d}{2}\)

v = The tangential speed

Which gives;

\(\displaystyle r = \frac{0.12}{2} = 0.06\)

\(\displaystyle 0.28 \, m/s^2 = \frac{v^2}{0.06 \, m}\)

v² = 0.28 m/s² × 0.06 m = 0.0168 m²/s²

v = √(0.0168 m²/s²) ≈ 0.12961 m/s

The tangential speed, v = 0.12961 m/s

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Both Newton's laws and Kepler's third law can be used to estimate the mass of the black hole in M87, and combining the information obtained from both methods has led to the discovery that the black hole is approximately 6.5 billion times the mass of the sun.

Yes, both Newton's laws and Kepler's third law can be used to determine the mass of the central black hole in M87 by analyzing the motion of the hot gas orbiting the nucleus.

Newton's laws of motion can be applied to the orbiting gas to determine the centripetal force acting on it, which is related to the gravitational force between the gas and the central black hole. This, in turn, can be used to calculate the mass of the black hole.

Kepler's third law can also be used to determine the mass of the black hole by analyzing the orbital period and distance of the gas from the black hole. The law states that the square of the orbital period is proportional to the cube of the semi-major axis of the orbit, which can be used to calculate the mass of the black hole.

By combining the information obtained from both methods, astronomers have been able to estimate the mass of the central black hole in M87 to be approximately 6.5 billion times the mass of the sun. This groundbreaking discovery was made possible by the Event Horizon Telescope, which is a network of telescopes that are able to observe black holes and their surroundings in unprecedented detail.

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When requires a force of 9.0 newtons to propel it at a speed of 5.0 m/sec if the power rating of the car is 45.

The term "force" has a specific meaning in science, at this level, calling a force a push or a pull is quite appropriate.

A force is not something an item "has in it" or that it "contains, one thing experiences a force from another. There are both living things and non-living objects in the concept of a force.

Therefore, the power rating of the car is 45.

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Answer:

To share a positive experience she had with a pen pal

Explanation:

Just read the story :)

Answer:

C To share a positive experience she had with a pen pal

Explanation:

on edge

Answer:

A: 2.8 * 10^(-14) J

Explanation:

Formula to find the energy is;

E = hc/λ

Where;

E is energy of a photon (E)

λ is wavelength of the light

c is speed of light

Thus;

E = (1.99 *10^(-25))/(7 * 10^(-12))

E = 2.8 * 10^(-14) J

The temperature of a main sequence star is directly related to its brightness. Therefore, the hottest star, with a temperature of 7500 K, is the brightest.

The brightness of a main sequence star is determined by its surface temperature. According to the Stefan-Boltzmann law, the luminosity (brightness) of a star is proportional to the fourth power of its surface temperature. This means that as the temperature increases, the star becomes brighter.

Given the temperature options of 6000 K, 7500 K, and 4500 K, the star with the highest temperature of 7500 K will be the brightest. As the temperature decreases from 7500 K to 6000 K and then to 4500 K, the brightness of the star decreases accordingly.

Therefore, the correct answer is that the star with a temperature of 7500 K is the brightest among the given options.

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