All atoms of the same element must have the same number of

Answer:

30.0 cm

Explanation:

We can use the mirror equation:

[tex]\frac{1}{f}=\frac{1}{p}+\frac{1}{q}[/tex]

where

f = +15.0 cm is the focal length of the mirror

p = 30.0 cm is the distance of the object from the mirror

q is the distance of the image from the mirror

Solving the equation for q, we find

[tex]\frac{1}{q}=\frac{1}{f}-\frac{1}{p}=\frac{1}{15.0 cm}-\frac{1}{30.0 cm}=\frac{1}{30.0 cm}\\q = 30.0 cm[/tex]

Answer:

B)None

Explanation:

Answer:

F(t)=19.84N

Explanation:

The rest is in the picture.

F(t)=19.84N.

When two bodies in contact move with respect to each other, rubbing the surfaces in contact, the friction between them is called kinetic friction.

Kinetic friction f_k=\mu _k \times N

where \mu _k is the coefficient of kinetic friction and N is the normal force.

Here the block will experience forces,

1) The normal force  N  in the upward direction

2) The gravitational force F=Mg in the downward direction

3) The tension T, say in the right direction

4) The kinetic friction f_k =\mu _k \times N in the left direction

For vertical equilibrium, N=Mg

We have kinetic friction f_k =\mu _k \times N=\mu _k \times Mg

As the block moves towards the right with an acceleration,

Total force on the block f_t_o_t_a_l=Ma=T-f_k

Ma= T- \mu \times Mg

T=Ma+\mu _k\times Mg

= M(a+\mu_kg)

=4×(3+ 0.2×9.8)

=19.84 N

The tension in the string is 19.84 N.

In static friction, the frictional force resists the force that is applied to an object, and the object remains at rest until the force of static friction is overcome. In kinetic friction, the frictional force resists the motion of an object.

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When the heat source is removed from a fluid, convection currents in the fluid will eventually distribute heat uniformly throughout the fluid.  When all of the fluid is at the same temperature, convection currents will stop.

The motion of a pendulum is predominantly affected by gravity, creating a restoring force, and the tension in the string, which guides the pendulum's arc-like oscillation. The period of a pendulum is dependent on its length and the acceleration due to gravity, not the mass of the bob.

In addition to gravity, the other predominant force affecting the motion of a pendulum is the restoring force arising from the tension in the string. This force is crucial for the oscillation of the pendulum. When a pendulum swings, gravity acts to pull it back towards the equilibrium position, creating a restoring force that is a component of the gravitational force. As the pendulum moves, the tension in the string exerts a force perpendicular to the direction of gravity, which along with the component of gravity, causes the pendulum to follow an arc-like path.

The motion of a pendulum is not affected by the mass of the bob; instead, it is the length of the pendulum and the acceleration due to gravity that determines its period. For a simple pendulum, the period formula shows that the period (T) is independent of the mass and is given by T = 2π√(L/g), where L is the length and g is the acceleration due to gravity.

Thus, the primary forces that cause a pendulum to oscillate are gravity, providing the restoring force, and the tension in the string, allowing for the pendulum's arc path during its swing.

Explanation:

Sensory adaptation refers to the adjustment of the sensory capacity of a person following prolonged exposure to stimuli.

To better understand this, it is necessary to explain that environmental stimuli cause a change in the sensitivity of a person's sensory receptors. Then, depending on the type of environmental stimulus, the determined receptor will be stimulated (related to the five main senses of the human being: sight, smell, taste, touch and hearing).

However, when a person gets used to a stimulus, adaptation occurs. Therefore, it will not respond to the stimulus in the same way as it did before.

A very common example is the relation with the smells (olfactory sense), because people get used quickly to the smells that surround them and then they stop "perceiving" the smell.

Decreased sensitivity to an unchanging stimulus is known as sensory adaptation. This process allows organisms to ignore 'background noise' in their environment and focus on more important stimuli.

The term for decreased sensitivity to an unchanging stimulus is known as sensory adaptation. This phenomenon occurs when sensory neurons become less sensitive to constant stimuli that are unchanging over an extended period of time. It's the reason you might stop noticing a persistent smell after being in a room for a while; your sensory neurons are effectively 'deciding' that this unchanging stimulus is not important. This is a key process that allows organisms to filter out 'background noise' in their environment and focus on changes and potential threats. An example of sensory adaptation could be your tactile sense 'ignoring' the clothes you are wearing, you become adapted and no longer consciously feel them.

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Answer:

Religion

Explanation:

Religion is a big factor. Many people believe that the Big Bang DID happen while some believe it to be incorrect due to religious beliefs. I can guarantee if you ask people on the street about the Big Bang, someone will say something about religion. The Theory goes against every religions beliefs as to how the universe was created.

Final answer:

The Big Bang theory, supported by evidence like the CMB and Hubble expansion, may be controversial among nonscientists due to misunderstandings and challenges to personal beliefs. It describes the universe's expansion from a hot, dense state, not an explosion in space. Clarification of common misconceptions is essential for better public understanding.

Explanation:

The Big Bang theory is a cornerstone of modern astrophysics and cosmology, and it describes the universe's birth approximately 13.7 billion years ago from an extremely hot, dense state. Following this, the universe has been expanding and cooling ever since. One crucial piece of evidence for the Big Bang theory is the cosmic microwave background (CMB), which is seen as the remnant heat from the early universe. Moreover, the observed Hubble expansion, where galaxies are moving away from us, supports the idea of an expanding universe.

Many nonscientists may find the Big Bang theory controversial due to a variety of reasons. These objections might stem from misunderstandings about the nature of the theory, as it is not an explosion in the common sense but rather an expansion of space-time itself. Additionally, the Big Bang theory can challenge certain philosophical or religious beliefs about the origin of the universe. This discord may be due to the theory's implications that are difficult to reconcile with personal beliefs or due to a lack of familiarity with the scientific evidence and reasoning that supports the theory.

It is important to note that the Big Bang theory is not an 'explosion' from a single point in space, but instead a rapid expansion of space itself in all directions. Misconceptions like this often contribute to the controversy surrounding the theory among nonscientists. To address such misconceptions and provide a clearer understanding, resources like the scientific article by Lineweaver and Davis titled "Misconceptions about the Big Bang" explain the fundamental concepts using the framework of general relativity.

Answer:

The attitude of a text about a subject being discussed is called tone.

Answer:

tone

Explanation:

In a story the attitude of a character towards something shows us the character's tone. Tone is basically the emotion associated with a subject. Word choice or the arrangement of words allow a writer to express tone.

Mood and tone should not be confused the mood is the overall feeling the reader experiences while reading.

Answer:  The correct answer is :  D. The universe will continue expanding forever    

Explanation:  The theory that has had more acceptance is that the universe will continue to expand indefinitely ending in a "big freeze", also called thermal death of the universe. This theory holds that in about a billion years the stars will go out and most of the universe will remain in darkness. The universe would be too cold to have life.

Answer:

1.17 x 10^2 L

Explanation:

We can find the volume of the gas by using the ideal gas law:

[tex]pV=nRT[/tex]

where we have:

[tex]p=792 Torr \cdot \frac{1 atm}{760 Torr} = 1.04 atm[/tex] is the pressure

V is the volume

n = 4.8 mol is the number of moles

R = 0.0821 L · atm/mol · K is the ideal gas constant

[tex]T=37^{\circ}+273 =310 K[/tex] is the temperature

Solving the equation for V, we find the volume

[tex]V=\frac{nRT}{p}=\frac{(4.8 mol)(0.0821 L atm/mol K)(310 K)}{1.04 atm}=117.5 L = 1.17\cdot 10^2 L[/tex]

Answer:

the answer is  covalent bond

Explanation:

Atoms in a crystal are held together by a net attractive force between their constituent electrons and atomic nuclei. This force depends on the type of bonding in the crystal: ionic, covalent, or metallic. Molecules can also form crystals through molecular bonding.

Atoms arrange themselves in a lattice to form a crystal because of a net attractive force between their constituent electrons and atomic nuclei. The crystals formed by the bonding of atoms belong to one of three categories, classified by their bonding: ionic, covalent, and metallic. Molecules can also bond together to form crystals; these bonds, not discussed here, are classified as molecular.

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Answer: alpha radiation

Explanation:

Answer:

Answer:

1. emits energy when it decays

2. 0

3. helium nucleus

The least penetrating form of radiation: 4. alpha radiation

5. increases by 1

Explanation:

Answer:

204.1 Hz

Explanation:

The fundamental frequency of a vibrating string is given by:

[tex]f=\frac{1}{2L}\sqrt{\frac{T}{\mu}}[/tex]

where

L is the length of the string

T is the tension in the string

[tex]\mu[/tex] is the linear mass density of the string

For the wire in this problem, we have

L = 2.00 m

T = 8.00 kN = 8000 N

[tex]\mu = 12.0 g/m = 0.012 kg/m[/tex]

Therefore, substituting into the equation, we find the frequency of the string:

[tex]f=\frac{1}{2(2.00 m)}\sqrt{\frac{8000 N}{0.012 kg/m}}=204.1 Hz[/tex]

The frequency of the fundamental mode of vibration of the piano wire which is 2.00 meters long, has a linear mass density of 12.0 g/m and under a tension of 8.00 kilonewtons is approximately 257.247 Hz.

The fundamental frequency of vibration of the piano wire can be calculated using the formula for the frequency of a vibrating string:

f = 1/2L * sqrt(T/μ)

Where:

In this case, L = 2.00 m, T = 8.00 * 10^3 N (since 1 kilonewton equals 1,000 newtons), and μ = 0.012 kg/m. Hence, substituting these values gives:

f = 1/(2*2.00 m) * sqrt((8.00 * 10^3 N)/(0.012 kg/m))

After calculating, the frequency of the fundamental mode of vibration of this wire is found to be approximately 257.247 Hz.

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Answer:

562.5 m

Explanation:

The vertical position of the ball is given by

[tex]y=h+ut+\frac{1}{2}gt^2[/tex]

where

h is the height of the tower (the initial position of the ball)

u = 100 m/s is the initial velocity of the ball (positive because it points upwards)

g = -9.8 m/s^2 is the acceleration due to gravity (negative because it points downward)

t is the time

Substituting t =25 s and y = 0 (at t=25 s, the height of the ball is zero, since it has reached the base of the tower), we can re-arrange the equation to find h:

[tex]h=y-ut-\frac{1}{2}gt^2 = 0-(100 m/s)(25 s) - \frac{1}{2}(-9.8 m/s^2)(25 s)^2 = 562.5 m[/tex]

Answer:

steam at 110 degrees celsius

Explanation:

this is because the steam is at the highers temp

The particles move most rapidly in steam at 110°C. This is because steam represents water in its gaseous state, where the particles have the highest kinetic energy compared to the other options provided. The correct answer isc.

The particles in a substance move more rapidly as the temperature increases. Given the choices a. ice at -20 °C, b. water at 20 °C, c. steam at 110 °C, d. boiling water, and e. ice at 0 °C, the particles would move most rapidly in steam at 110 °C. This is because at higher temperatures, the particles gain kinetic energy and thus move faster.

Between solid ice and liquid water, the particles in the liquid water move faster, but not by as much as one might expect; there is only a 0.4% difference in average speed between ice at -1°C and water at 1°C. Therefore, steam at a temperature higher than boiling water will have the most rapidly moving particles among the options provided.

Answer:

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Explanation:

all the credit goes to the user who answered this.

I do not have any rights on this.

Tip=>Please check your question in the search bar before asking.

Answer:

Explanation:

crust

Sodium bicarbonate is a common base. Please find more information on the base below.

A base in chemistry is a class of substance characterized by being generally water-soluble, have a bitter taste, turns red litmus blue, and react with acids to form salts.

Sodium bicarbonate, also known as baking soda, is a salt of sodium hydroxide and carbonic acid. It has the chemical formula; NaHCO₃.

When sodium bicarbonate dissolves in an aqueous solution, it forms bicarbonate, which turns the solution basic, hence, it is said to act as a weak base in aqueous solution.

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Answer:

The answer is A but I could be wrong

Answer: A. Predict the effect of bike size on the speed of a rider his height.

(Apex) Pretest

It can go through the all the states: solid, liquid, and gas.

On the ground, it is a liquid as water.  Then, it evaporates and becomes water vapor, a gas.  As it condensates, little droplets of vapor come together.  Then, it falls to the Earth as liquid water or frozen as solid snow/sleet/hail in precipitation.

Hope this helps!!

Final answer:

During the water cycle, water changes states from solid (ice and snow) to liquid (in bodies of water and clouds) to gas (water vapor) through processes like evaporation, condensation, and precipitation.

Explanation:

States of Matter in the Water Cycle

The water cycle involves water going through different states of matter: solid, liquid, and gas. Water in its solid state includes ice and snow. When energy is added to solid water, it melts into its liquid state, which is found in ground water, lakes, oceans, and clouds. As more heat is applied, water becomes a gas in the form of water vapor. This cycling involves several key processes, such as evaporation (liquid to gas), condensation (gas to liquid), precipitation (liquid to solid or liquid), and possibly sublimation (solid directly to gas).

Changing states within the water cycle are crucial as matter is recycled on Earth, allowing ecosystems to function properly. As heat is applied or removed, water transitions between these states, facilitating nutrient and energy flows vital for all living organisms. The processes mentioned above, like evaporation and condensation, are continuously happening all around the planet, enabling the water cycle to sustain life on Earth.

Answer: 0.313 rad/s

Explanation:

The equation that relates the velocity [tex]V[/tex] and the angular velocity [tex]\omega[/tex] in the uniform circular motion is:

[tex]V=\omega.r[/tex]   (1)

Where [tex]r=d/2=100m[/tex] is the radius of the space station (with a diaeter of 200m) that describes the uniform circular motion.

Isolating [tex]\omega[/tex] from (1):

[tex]\omega=\frac{V}{r}[/tex]  (2)

On the other hand, we are told the “artificial gravity” produced by the cetripetal acceleration [tex]a_{c}[/tex] is [tex]9.8m/s^{2}[/tex], and is given by the following equation:

[tex]a_{c}=\frac{V^{2}}{r}[/tex]   (3)

Isolating [tex]V[/tex]:

[tex]V=\sqrt{a_{c}.r}[/tex]   (4)

[tex]V=31.3049m/s[/tex]   (5)

Substitutinng (5) in (2):

[tex]\omega=\frac{31.3049m/s}{100m}[/tex]  (6)

[tex]\omega=0.313rad/s[/tex] This is the angular velocity that would produce an “artificial gravity” of 9 [tex]9.8m/s^{2}[/tex].

The angular velocity that would produce an artificial gravity of 9.80 m/s^2 at the rim of the space station is 0.221 m/s.

To calculate the angular velocity required to produce an artificial gravity of 9.80 m/s2, we can use the equation ac = rω2. Here, ac is the centripetal acceleration, r is the radius of the space station, and ω is the angular velocity. Rearranging the equation, we get ω = sqrt(ac/r), where sqrt is the square root function. Plugging in the given values, we have ω = sqrt(9.80 m/s2 / 200 m) = 0.221 m/s. Therefore, the angular velocity that would produce an artificial gravity of 9.80 m/s2 at the rim of the space station is 0.221 m/s.

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Answer: It states, rather than explains, the relationship between the variables.

Explanation:

Let's start by defining  theory and law:

Theory is the set of rules and principles that describe and explain a particular phenomenon.

In other words: It refers to the explanation of the functioning of things.

Another important point is that the theory is subject to changes as new evidence emerges that gives meaning to it.

On the other hand, a Law is an affirmation (something established) based on repeated long-term observation of a phenomenon that has been studied and verified.

That is: A law is present in all known theories and therefore is considered universal. In addition, a law can not be refuted, nor changed,  because its precepts have been proven through various studies.

Then, based on what is explained above, the statement "force equals mass times acceleration" is a law because it is a statement that exists because it was rigorously tested and verified, therefore it can not be refuted.

The correct order of events in the development of rip currents is: (A) waves travel to the beach, (E) waves are broken by the sandbars, (C) waves reach the shore and the backwash returns to the ocean, and finally, (D) waves speed up and flow between the sandbars causing rip currents.

The order of events in the development of rip currents, which are strong channels of water flowing away from shore, can be described as follows:

The correct sequence, therefore, is A, E, C, D, B: A. Waves travel to the beach, E. Waves are broken by the sandbars, C. Waves reach the shore and go back to the ocean, D. Waves speed up and flow between the sandbars, B. Waves are trapped by the sandbars.

In the last step, the waves being trapped refers to the water that is pushed back towards the sea after the waves have broken, contributing to the formation of the rip current.

Answer:78 N

Explanation:Impulse=Force*time

=39*2 =78 Ns

Answer:

78 N S

Explanation:

just got it right on edg 2021

(a) 2.97 m

The wavelength of an electromagnetic wave is given by:

[tex]\lambda = \frac{c}{f}[/tex]

where

[tex]\lambda[/tex] is the wavelength

c is the speed of light

f is the frequency

For the radio wave in the problem, the frequency is

[tex] f = 101 MHz = 101 \cdot 10^6 Hz[/tex]

Therefore, the wavelength is

[tex]\lambda = \frac{3\cdot 10^8 m/s}{101\cdot 10^6 Hz}=2.97 m[/tex]

(b) [tex]1.05\cdot 10^{-4} W/m^2[/tex]

The intensity of the radio signal is given by

[tex]I=\frac{P}{A}[/tex]

where

P is the power of the signal

A is the area over which the signal is radiated

In this situation:

P = 50,000 W is the power

the area is a hemisphere with a radius of

r = 8.70 km = 8700 m

So the area to be considered is

[tex]A=2\pi r^2 = 2\pi (8700 m)^2=4.76\cdot 10^8 m^2[/tex]

Therefore, the intensity of the signal is

[tex]I=\frac{50000 W}{4.76\cdot 10^8 m^2}=1.05\cdot 10^{-4} W/m^2[/tex]

(c) 0.281 V/m

The intensity of an electromagnetic wave can be written as

[tex]I=\frac{1}{2}c\epsilon_0 E^2[/tex]

where

c is the speed of light

[tex]\epsilon_0[/tex] is the vacuum permittivity

E is the amplitude of the electric field

Re-arranging the equation, we get

[tex] E=\sqrt{\frac{2I}{c \epsilon_0}}[/tex]

And substituting

[tex]I=1.05\cdot 10^{-4} W/m^2[/tex]

we find

[tex] E=\sqrt{\frac{2(1.05\cdot 10^{-4} W/m^2)}{(3\cdot 10^8 m/s)(8.85\cdot 10^{-12} F/m)}}=0.281 V/m[/tex]

Explanation:

Radiant energy is transmitted through the electromagnetic waves, that is, the light in all its spectrum. This energy is characterized by its propagation in vacuum, without needing a medium or material.

This energy can also be transformed into thermal energy by transmitting heat by radiation.

Answer:

[tex]v = 18.4 m/s[/tex]

Explanation:

When it reached to the top of the path the normal force is given as

[tex]F_n = 370 N[/tex]

initially the reading of the sensor will give the amount of the weight of the object

[tex]W = mg = 740 N[/tex]

[tex]m = 75.4 kg[/tex]

now at the top position of the path we will have

[tex]F_n + mg = \frac{mv^2}{R}[/tex]

[tex]370 + 740 = \frac{(75.4)v^2}{23}[/tex]

[tex]1110 = 3.28 v^2[/tex]

[tex]v = 18.4 m/s[/tex]

The speed of the rider at the top of the loop cannot be calculated with the given information.

To find the speed of the rider at the top of the loop, we can use the concept of centripetal force. In this case, the normal force provides the centripetal force required to keep the rider moving in a circular path. At the top of the loop, the normal force is equal to the sum of the rider's weight and the centripetal force:

N = mg + ω2r 

Where N is the normal force, m is the mass of the rider, g is the acceleration due to gravity, ω is the angular velocity (which is equal to the speed divided by the radius), and r is the radius of the loop. We can rewrite this equation as:

 ω = √(N/m - g)

 Given that the normal force at the top of the loop is 370 N and the radius is 23 m, we can calculate the speed:

 ω = √(370/740 - 9.8)

 ω = √(0.5 - 9.8)

 ω = √(-9.3)

Since the square root of a negative number is not a real number, it means that the rider does not have enough speed to complete the loop. Therefore, it is not possible to calculate the speed of the rider at the top of the loop based on the given information.

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Explanation:

Mass is defined as the amount of matter that makes up a body; which is measured by its inertia.  

It should be noted that inertia is a property of bodies or objects that is related to resistance to changes in its state of motion. So, the amount of inertia that a body possesses depends on its quantity of matter, that is, its mass.

The amount of inertia an object has is determined by its mass. An object with a larger mass will have greater inertia.

The amount of inertia an object has is determined by its mass. Inertia is the property of an object that resists changes in its motion. The more mass an object has, the greater its inertia. This means that an object with a larger mass will require more force to accelerate or decelerate compared to an object with a smaller mass.

For example, a heavy book will be harder to push than a lightweight book because it has more inertia due to its greater mass.

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Hello There!

This statement is true.

The winter solstice is in the Northern Hemisphere

Answer:

Making observations is the step of scientific method in which information is obtained through the senses.

Explanation:

Making observations is the step of scientific method in which information is obtained through the senses. This also happens to be the first step of the scientific method. Other steps include;

analyzing data

drawing conclusions

revising a hypothesis

Answer:

The correct answer will be-making observations (first step).

Explanation:

The senses are the physiological response of the external surrounding that allows us to live like sight, taste, smell, touch and hearing.

The scientific method begins with making observations of the natural world followed by framing a hypothesis which could be proved or disproved by performing experiments.

The senses allow us to sense the natural phenomenon through sensory organs which is included in the process of making observations.  

Thus, making observations is the correct answer.