Argon, neon, and xenon are examples of
A. Halogens
B.metalloids
C. noble gases
D. alikia metals

Answer:

Explanation:

Plastic can be used for various purposes due to the fact that it can be molted into different shapes and sizes. It is a good packaging and transport material. Due to it's sterile nature does not support microbial growth thus used in healthcare items. It is inexpensive and can be affordable by all.

The answer is "d. increased temperature".

At the point when corals are stressed by changes in conditions, for example, temperature, light, or supplements, they remove the symbiotic algae living in their tissues, making them turn totally white. Hotter water temperatures can result in coral bleaching. At the point when water is too warm, corals will oust the algae living in their tissues, making the coral turn totally white. This is known as coral bleaching.  

When a coral blanches, it isn't dead. Corals can endure a bleaching occasion, yet they are under more pressure and are liable to mortality.

Answer: d.increased temperature

Explanation:

The colony of coral polyp (coral reef) and algae lives in mutualistic association in oceanic waters. In this association the coral reef receives it's color and algae receives food and shelter. The increase in temperature is the abiotic factor responsible for the removal of the algal colony from the coral reef. The increase in temperature of oceanic water, causes the algal colony to swell and the algal colony get remove from the coral reef . The coral reef looks white due to the composition of calcium carbonate. This phenomena is called as coral bleaching.

Answer:

C

Explanation:

Because getting a friend to help will not half the work, and if he does it alone it will not increase the work. Knowing A, and B are wrong, we know it can not be D for the first two options are wrong. Also proof of it being C: if an object moves no distance no work can be done. For example 80 x 0 = 0 The answer being amount of work being done.

The linear velocity of the tip of a lawnmower blade is equal to 0.0515 miles per hour.

Angular velocity can be described as the rate of change of angular displacement of an object and the axis about which the object is rotating. The amount of change in angular displacement at a given period of time is known as angular velocity.

Given, a lawnmower blade spinning at 2600 revolutions per minute in a lawnmower that cuts a path that is 24 inches wide.

The frequency of the blade is f = 2600 rpm

First of all convert minutes into hours,

The frequency of the blade becomes = 2600/60 = 43.3 revolutions per hour.

The angular velocity of the blade, ω = 2πf

ω = 2 ×3.14 × 43.3

ω = 272.13 rad/hr

The diameter of the circle centered at the midpoint of the blade is the width of the path.

Diameter of the circle = 24 inches

Radius of the circle, R = 24/2 =12 inches

Let's convert inches into miles:

12 inch = 12 × 1.578 e⁻⁵ mile

R = 12 inch = 0.0001893 mile

The linear velocity of the tip of a blade, v = ωR

v = 272.13 × 0.0001893

v = 0.0515 mile per hour

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Kepler's second law of planetary motion states that the imaginary line connecting the sun to a planet sweeps out equal areas in equal times.

Kepler's second law of planetary motion states that the imaginary line connecting the sun to a planet sweeps out equal areas in equal times. This means that as a planet moves around the sun, it will cover equal areas in equal amounts of time. This law helps explain how planets move in their orbits and provides insight into the dynamics of the solar system.

For example, consider two points in a planet's orbit, point A when it is close to the sun, and point B when it is farther away. The imaginary line drawn from the sun to the planet at point A will sweep out a large arc due to the increased speed, corresponding to a large area. At point B, where the planet is moving slower, the arc and hence the area swept out will be smaller. According to Kepler's Second Law, these two areas will be equal if the time periods considered are equal.

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Answer: Flyash

Explanation:

Flyash is a waste produced after the combustion of the coal in a power plant. The ash is in the form of small dark flakes.

The natural gas is a fuel which is produced by the degradation and decomposition of the organic matter generated from plant and animal matter. The following are the sources of the natural gas: oils, wells, biomass and landfill as they are sources of deposited organic matter. But flyash contains very less organic content.

Tables are also helpful when you have a lot of different units of measurement, which can be tough to do in a graph in an simpler to read way. In contrast, graphs interact with our visual system.

A graph is a mathematical representation of a network that implies the interconnection between lines as well as points.

A graph is composed up of points with lines intersecting them. The length of the lines along with the position of the points are irrelevant. Each object in a graph is renowned to as a node.

Since they gives information quickly as well as easily, graphs and charts are also effective visual tools.

The data table is the most functional basic building block of business intelligence.

In its most basic form, it consists of a series of columns and rows that intersect in cells, plus a header row that states the names of the columns to make the table's content understandable to the end user.

Thus, this is the basic difference between the data table and a graph.

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Answer: Hello!  

"The force which attracts iron nails towards a magnet" is a magnetic force, where the only thing acting on the iron nails is the magnetic field produced by the magnet.

"The force which attracts a positive charge towards a negative charge" and this is an electric force, where the negative charge creates an electric field, and this electric field acts on the positive charge

Both forces are related because both of them are consequences of the electromagnetic field.

Because the things acting on the objects are fields, both of these forces are non-contact forces.

The change in speed of a vehicle moving in a straight line each second can be calculated using the formula:

For an acceleration of 2 km/h·s:

change in speed = 2 km/h·s × 1 s = 2 km/h

For an acceleration of 4 km/h·s:

change in speed = 4 km/h·s × 1 s = 4 km/h

For an acceleration of 10 km/h·s:

change in speed = 10 km/h·s × 1 s = 10 km/h

________________________________________________________

Answer: 4 they both experienced same magnitude of force.

Explanation:

According to Newton's 3rd law of motion,it implies that for every force exerted by an object on another object is the same magnitude directed back.

The force the VW beetle has when it hits the mosquito was the same force exerted on the mosquito on impact.

Therefore the magnitude of their forces are the same.

If a fast-moving vw beetle traveling at 54 mph hit a mosquito hovering at rest above the road , then they experienced the same magnitude of force, therefore the correct answer is option 4 .

Newton's Second Law states that The resultant force acting on an object is proportional to the rate of change of momentum.

As given in the problem , if a  fast-moving vw beetle traveling at 54 mph hit a mosquito hovering at rest above the road, then we have to find  which bug experienced the largest force ,

Thus, the right response is option 4 , as both the fast-moving VW Beetle and the mosquito, which was resting above the road and traveling at 54 mph, would have suffered the same amount of force .

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The momentum of the basketball is three times greater than the momentum of the softball, given that they both have the same velocity.

Momentum is defined as the product of an object's mass and its velocity. If the softball and the basketball are both moving at the same velocity, we can compare their momenta based on their respective masses.

The momentum of an object is given by the equation:

Momentum = mass × velocity

For softball:

Momentum_softball = m_softball × velocity

For the basketball:

Momentum_basketball = m_basketball × velocity

m_basketball = 3 × m_softball

Momentum_basketball = (3 × m_softball) × velocity

Comparing the momenta, The momentum of the basketball is three times greater than the momentum of the softball, given that they both have the same velocity.

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E =  h c / ʎ

where,

h is the Planck’s constant = 6.626 x 10⁻³⁴ m² kg / s

c is the speed of light = 3 x 10₈ m/s

ʎ is the wavelength of light = 150 nm = 150 x 10⁻⁹ m

Now pot the values in equation;

E = (6.626 x10⁻³⁴ m² kg / s) x (3 x 10⁸ m/s) / (150 x 10⁻⁹ m)

E = 1.325 x 10⁻¹⁸ J

Now by using the following equation we can calculate the frequency;

E = hf

f = E/h

f = 1.325 x 10⁻¹⁸ / 6.626 x 10⁻³⁴ 

f = 1.9997 x 10¹⁵ Hz

The energy of an ultraviolet photon with a wavelength of 150 nm is 1.33 × 10⁻¹⁸ J, and its frequency is 2 × 10¹⁵ Hz.

To determine the energy of an ultraviolet photon with a wavelength of 150 nm, we need to first find the photon’s frequency using the light equation:

c = λ × ν

Rearranging the equation to solve for frequency:

ν = c / λ

Substituting the values:

ν = (3.00 × 10⁸ m/s) / (150 × 10⁻⁹ m) = 2.00 × 10¹⁵ Hz

Next, we use Planck’s equation to find the energy of the photon:

E = h× ν

Substituting the values:

E = (6.626 × 10⁻³⁴ J·s) × (2.00 × 10¹⁵ Hz) = 1.33 × 10⁻¹⁸J

The energy of the ultraviolet photon with a wavelength of 150 nm is 1.33 × 10⁻¹⁸ Joules, and its frequency is 2 × 10¹⁵ Hz.