consider a stick 1.00 m long and its moments of inertia about axes perpendicular to the stick's length and passing through two different points on the stick: first, a point at its center and second, a point 44 cm from one end. calculate the ratio , the ratio of the second moment of inertia to the first.

Answer:

Smoke alarms detect fires by sensing small particles in the air using a couple of different kinds of technologies. Once they detect those particles above a certain threshold, they signal the alarm to sound so that you and your family can get to safety and call 911. Smoke alarms save lives.

Answer:

There must be an equal amount of each element on both sides of the equation. Hope this helps and please marks as the brainliest.

Explanation:

Answer:

The answer is D

Explanation:

Hope this helps!

Answer:   By squeezing the balloon, you reduce the space the gas particles can occupy. As the particles are pushed a bit closer together, they collide with more, so the pressure from the moving gas particles increases. If the volume increases, its pressure decreases.

The fastest rollercoaster in the world is the formula rossa in abu dhabi, united arab emirates, speed of this is 240 km/h (149.1 mph)

The rate at which an object's distance traveled changes is measured by its speed. In terms of measurement, speed is a scalar, meaning it has magnitude but no direction. Speed is the rate at which an object moves over a given distance. a thing that travels at a high rate of speed and covers a lot of distance quickly. A slow-moving object, on the other hand, travels a comparatively short distance in the same amount of time when moving at a low speed. An object with zero speed is completely immobile.

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The hailstone will hit the earth in 4.04 seconds.

we move 9.8 meters per second faster thanks to gravity. we   start to fall after one second at 9.8 m/s. we start falling at 19.6 m/s after two seconds, and so forth.

From the query, the following information may be deduced:

Height (H) = 120 m

Gravitational acceleration (g)=9.8 m/s2.

Time (t)=?

It is possible to determine the hailstone's impact time as:

h=1/2 gt²

120= 1/2 x 9.8 x t²

120x2/9.8=t²

t²=24.48

t=4.94 s

therefore, the calculated time taken is 4.94 s.

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Answer:

The answer to the question is 90 cm i.e the object distance is 90 cm from the mirror.

CALCULATION:

As per the question, the focal length of the convex mirror f = 30 cm.

The magnification is: 1/4

We are asked to calculate the object distance [u].

As per the sign convention for reflection, the measurements taken along the direction of light is taken as positive and its reverse is taken as negative.

The transverse measurement above the principal axis is taken as positive and below the principal axis is taken as negative.

Hence, the focal length of the convex mirror f = +30 cm.

The image formed by a convex mirror is virtual and erect.

Hence, the magnification will be positive.

Hence, magnification m = +1/4=+0.25

The relation between focal length, magnification and object distance is given as -

m=  f/f=u

u=  m=1/m multiplyed by f

=  0.25=1/0.25 multiplyed by -(30)

=  -90 cm [ans]

   Here, the negative sign is due to the fact  that object distance is measured opposite to the direction of  light.  

(sorry, brainly didn't allow me to put pictures of the calculation)

hope this helps :)                            

Answer:

kilogram per

Explanation:

When salt is added, it makes it harder for the water molecules to escape from the pot and enter the gas phase, which happens when water boils, Giddings said. This gives salt water a higher boiling point, she said.

Answer:

Explanation:

Adding salt (independent variable) causes the boiling temperature of the water (dependent variable) to increase.

The increase in the spread of vector-borne diseases can be attributed to a variety of factors.

One possible reason is climate change, which has led to warmer temperatures and changes in precipitation patterns, creating more suitable conditions for vectors such as mosquitoes and ticks to thrive and spread diseases. Urbanization and population growth also play a role, as they lead to increased human contact with vectors and their habitats. Additionally, global travel and trade have made it easier for vectors and their pathogens to spread across borders and continents. Poor sanitation and waste management practices, as well as lack of access to clean water and basic healthcare services, also contribute to the spread of vector-borne diseases in certain regions.

Finally, the emergence of drug-resistant strains of pathogens, as well as the lack of effective vaccines for many vector-borne diseases, further complicate efforts to control and prevent their spread. Overall, addressing the root causes of the increase in vector-borne diseases will require a multi-faceted approach that includes investments in public health infrastructure, climate change mitigation and adaptation, and global cooperation to tackle the spread of diseases across borders.

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Answer:

\( \frac{5}{6} \)

Explanation:

To answer this question, we need to use the equation for sliding friction. Sliding friction is the force that opposes the motion of a box or an object that slides across a surface.

The equation for sliding friction is:f = μNwhere:f is the force of sliding friction,μ is the coefficient of sliding friction, andN is the normal force between the box and the surface on which it is sliding.We can use this equation to find the coefficient of sliding friction when we know the force required to move the box at a constant rate.Let's use the values in the question to find the coefficient of sliding friction:

f = μNf = 6.0 N (the force required to drag the box at a constant rate)N = 18 N (the weight of the box)μ = f/Nμ = 6.0 N / 18 Nμ = 0.33 (rounded to two decimal places)

Therefore, the coefficient of sliding friction is 0.33. This means that the force of sliding friction is 0.33 times the normal force between the box and the surface. This also means that it takes more force to move the box than it does to keep it moving at a constant rate.

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for example

1. drinking water at least after 1 hour beacuse if we immediately drink water just after meal it dilutes the HCL produced in our stomach which hinders the digestion process

2.picking up tomatoes for salads which contains oxalic acid

3.Cutting apples which contains malic acid with knife then after sometimes it will trun into brown due to oxidation of iron present in a apple.

A few examples of real science that demonstrate how scientific research and exploration contribute to our understanding of the world around us are the Human genome project, Mars exploration, and Climate Change Studies.

Human Genome Project:

The Human Genome Project (HGP) is a real scientific endeavor that aimed to map and sequence all the genes in the human genome. It involved an international collaboration of scientists and researchers to understand the genetic makeup of humans.

Mars Exploration:

Various space agencies, such as NASA and ESA, have conducted real scientific missions to explore Mars. Rovers like Curiosity and Perseverance have been sent to the Martian surface to study its geology, and atmosphere, and search for signs of past life.

Climate Change Studies:

Climate change research is an ongoing scientific field that investigates the causes and effects of global climate change. Scientists collect and analyze data from various sources, including satellite observations, weather stations, and ice core samples, to study trends and changes in Earth's climate over time.

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The term for the mixing of outside air into a cloud or a rising parcel of air is entrainment.

option B.

Entrainment can be defined as the process by which surrounding air is drawn into a cloud or a rising parcel of air, leading to the mixing of air masses and affecting the cloud's characteristics and properties.

So let's define other terms given in the options;

Subsidence refers to the downward motion of air in the atmosphere.

Adiabatic mixing refers to the process in which air parcels with different temperatures and moisture content mix without exchanging heat with their surroundings.

A sounding, on the other hand, refers to a vertical profile of temperature, humidity, and other atmospheric properties obtained from instruments such as weather balloons.

Thus, the correct answer is Entrainment.

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Answer:

1.55

Explanation:

that it is the standard refractive index.

Answer:

The acceleration of the ball is constant and equal to -9.81 m/s² (acting downwards)

The velocity of the ball reduces at a constant rate with time on its way up

Explanation:

The motion of the ball upwards is described by the following equation;

v = u - g × t

v² = u² - 2 × g × s

Where;

v = The final velocity of the ball

u = The initial velocity of the ball

g = The acceleration due to gravity = Constant

s = The height of the bass after a given time, t

t = The time in which the ball is rising

Therefore, the acceleration of the ball = The acceleration due to gravity  (Constant) = -9.81 m/s²↓

From v = u - g × t = u - 9.81 × t , the velocity of the ball reduces at a constant rate with time on its way up.

Answer:

Acceleration remains constant and velocity decreases

Explanation:

The negative sign of the force implies that it is in the opposite direction of other force to be in equilibrium.

The force of attraction or repulsion occurring between two charged particles is known as electrostatic force. It is also known as Coulomb's force.

Here,

The three point charges are placed rectilinearly at equal distances of 20m apart. Thus they can be shown as an equilateral triangle of side 20 mm and the three point charges are placed at its corners.

So, when the electrostatic forces between the point charges are calculated, the force exerted by A on B is -135 N.

The negative sign of the force implies that it is opposite to the direction of the rest of force. That means the force exerted by A on B  and the remaining resultant forces must be equal and opposite in direction. This is to attain equilibrium of forces.

Hence,

The negative sign of the force implies that it is in the opposite direction of other force to be in equilibrium.

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Answer:

Volume of an object (L): blue 105.00, yellow 105.00, green 102.50, red 101.25

Density of an object (kg/L) Mass / Volume: blue 1, yellow 1, green 1.014, red .992

Sink or Float: blue sink, yellow sink, green float, red float

hope this helps

Hi there!

This is an example of a recoil collision.

Let m1, v1 be Mary

Let m2, v2 be Jim

Utilize the conservation of momentum:

m1v1 + m2v2 = m1v1' + m2v2'

The initial velocities are zero (at rest), so:

0 = m1v1' + m2v2'

Let east be positive, so Jim recoils with a negative velocity:

0 = m1v1' - m2v2'

Set the two equal and solve:

m1v1' = m2v2'

m1v1'/m2 = v2'

(50)(2.5)/65 = v2' = 1.92 m/s to the WEST

Answer: u excited for the super bowl?

Explanation:

Answer:

(B)   hot air is lighter than cold air

P V = N R T       ideal gas equation

If T (temperature) is smaller then N (number of moles) must be larger if other quantities remain constant,

If a book is drops from a height of 1.4 m, then the speed with which book hits the ground is 5.2 m/s.

Given,

Initial velocity = 0m/s

Height = h = 1.4m

Acceleration due to gravity = 9.8 m/s2.

This can be calculated by using third equation of motion,

v2 - u2 = 2gh

where,

v is the final velocity

u is the initial velocity

h is the height

and g is the acceleration due to gravity.

By substituting all the values, we get

v2 = 2 × 1.4 × 9.8

v2 = 27.44

v = 5.2 m/s

Thus, we concluded that if a book is drops

from a height of 1.4 m, then the speed with which book hits the ground is 5.2 m/s.

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The half-life of 40K is approximately 1.3 billion years. Given a ratio of 40Ar/40K as 3/1 in a granite sample, we can estimate the age of the sample by understanding the decay process.  Based on the given 40Ar/40K ratio, the age of the sample is approximately 650 million years.

Since the half-life of 40K is 1.3 billion years, this means that after each half-life, half of the 40K atoms will have decayed into 40Ar. Therefore, if the ratio of 40Ar/40K is 3/1, it suggests that three-quarters (or 75%) of the original 40K atoms have decayed into 40Ar.

To determine the age, we can calculate the number of half-lives that have occurred based on the remaining 25% of 40K. Since each half-life is 1.3 billion years, dividing the remaining 25% by 50% (half) gives us 0.5. Thus, the sample has undergone 0.5 half-lives.

Multiplying 0.5 by the half-life of 1.3 billion years gives us an estimated age of 0.65 billion years, or 650 million years, for the granite sample.

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Answer:

Key Takeaways: Metallic Character​​ These properties include metallic luster, formation of cations, high electrical and thermal conductivity, and ...

Explanation:

The atoms with the strongest metallic properties on the periodic table are found in upper left corner of periodic table. The correct option is A.

The upper left corner of the periodic table is typically where one can find the atoms with the strongest metallic properties. Alkali metals and alkaline earth metals which are renowned for their high electrical conductivity, luster and malleability are found in this region. These elements are easy to lose and easily form positive ions because they have few valence electrons in their outermost energy levels.

Due to growing atomic size and declining electronegativity, metallic properties tend to become more noticeable as you move down and to the left in this region. On the other hand nonmetals and metalloids with stronger nonmetallic properties such as high electronegativity and poor electrical conductivity make up the lower right region.

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Heat waves are defined by the difference in temperature compared to the normal temperature typical of a region.

A heatwave happens when a location has extremely high maximum and minimum temperatures over the course of three days. This is taken into account in light of the area's climate and previous weather patterns.

An protracted period of unusually warm weather that frequently lasts longer than two days is known as a heat wave. Heat waves can occur both with and without a lot of humidity. They can spread out across a large region, placing many people in danger of extreme heat.

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Answer:

The black lines represent the energy absorbed by the electrons.

Explanation:

Atoms emit lights when they are excited. These lights are of particular wavelengths that match with different colors. A series of colored lines appear along with spaces in the middle of the two colors. The middle of the colors is filled with dark spaces. Each spectral line of an element represents a specific characteristic of the element. These colored lines appearing in the form of series are termed to be the atomic spectrum of the element. Identification of the elements is done through the line of the spectrum they possess.

Answer:

(B) The black lines represent the energy absorbed by the electrons.

Explanation:

Answer:

\(\Huge \boxed{\text{Impulse = 0.6 N s}}\)

Explanation:

Let's start by defining impulse. By multiplying the force applied to the object by the time that the force was applied, the term "impulse" relates to a measure of the change in momentum of an object. Mathematically, this is written as:

\(\LARGE \boxed{\text{Impulse = Force $\times$ Time}}\)

The football player kicks the ball in this case, with a force of 30 N, and his foot makes contact with it for 0.02 seconds. We can easily enter these values into the impulse formula to determine the impulse on the ball:

\(\LARGE \text{Impulse = Force $\times$ Time}\\\text{Impulse = 30 N $\times$ 0.02 s}\\\text{Impulse = 0.6 N s}\)

So the impulse on the ball is 0.6 N s.

----------------------------------------------------------------------------------------------------------

Newton = N

Newton-Second = N s / N · s

0.02 s = 0.02 seconds

----------------------------------------------------------------------------------------------------------

To clarify further, we can use impulse as a measurement of how much the player's foot force changes the ball's momentum.

The ball's momentum is increased by the player by kicking it with a force of 30 N since momentum is calculated as the product of an object's mass and velocity. The impulse, which in this case is, 0.6 N s, determines how much momentum is added to the ball.

The type of light that best illustrates the photoelectric effect is (c) ultraviolet light. Hence, the correct answer is option c).

Photoelectric effect refers to the emission of electrons from a metallic surface when a light of suitable frequency shines on the surface of the metal. The phenomenon, first noticed by Heinrich Hertz in 1887, was explained in 1905 by Albert Einstein when he used Planck's hypothesis to illustrate that light energy is carried in discrete quantized packets to describe the photoelectric effect.

In relation to photoelectric effect, the type of light that best illustrates it is ultraviolet light. This is because ultraviolet light has a high enough frequency to remove electrons from the metal surface. As a result, electrons that absorb photons with enough energy from the ultraviolet region of the electromagnetic spectrum will be ejected from the metal, causing the photoelectric effect, and producing an electric current.

When light is shone on a metallic surface, an electric current is produced, which is called the photoelectric effect. The photoelectric effect is caused by the emission of electrons from a metal surface that is exposed to a light of suitable frequency. The energy of the electrons depends on the frequency of the light, and the intensity of the light determines the number of electrons ejected from the surface.

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