Why does ice float in your drink but, your sunglasses sink in the pool?

Answer:

The height of the  object is 5007.4 miles.

Explanation:

Given that,

Weight of object = 200 lb

We need to calculate the value of \(Gmm_{e}\)

Using formula of gravitational force

\(F=\dfrac{Gmm_{e}}{r^2}\)

Put the value into the formula

\(200=\dfrac{Gmm_{e}}{(3958.756)^2}\)

\(200\times(3958.756)^2=Gmm_{e}\)

\(Gmm_{e}=3.134\times10^{9}\)

We need to calculate the height of the  object

Using formula of gravitational force

\(F=\dfrac{Gmm_{e}}{r^2}\)

Put the value into the formula

\(125=\dfrac{200\times(3958.756)^2}{r^2}\)

\(r^2=\dfrac{200\times(3958.756)^2}{125}\)

\(r^2=25074798.5\)

\(r=\sqrt{25074798.5}\)

\(r=5007.4\ miles\)

Hence. The height of the  object is 5007.4 miles.

Answer:

increase

Explanation:

I thing it increase

Answer:

the answer is 32.0-25.0=7

Explanation:

the absolute pressure at the bottom of the container is 7

The characteristic of a seismic wave that the motion shown by the sensor on the seismometer represents is the amplitude of the seismic wave.

Seismic waves are waves that transport energy away from the focus of an earthquake, and they cause the ground to shake. Seismometers are instruments that measure the shaking of the Earth caused by seismic waves. The black arrows in the picture show the relative motion of the sensor on the seismometer. The sensor moves back and forth as the ground shakes, and the amplitude of this motion represents the intensity of the seismic wave.The amplitude of a seismic wave is a measure of the strength or energy of the wave. It is the maximum displacement of the ground from its resting position during the passage of the wave. The greater the amplitude of the seismic wave, the stronger the shaking of the ground and the more damage it can cause. The amplitude of a seismic wave is usually measured in millimeters or centimeters.In summary, the motion shown by the sensor on the seismometer represents the amplitude of the seismic wave. This is an important characteristic of a seismic wave as it determines the intensity of the shaking and the potential damage that the earthquake can cause. Seismologists use this information to study earthquakes and to understand their effects on the Earth.

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Answer:

1.4 m/s2

Explanation:

i took the test

Increased driving can lead to higher vehicle maintenance and repair expenses, increased fuel costs, potential increases in auto insurance premiums, and additional parking fees, all of which should be considered when estimating the overall impact on your expenses.

The expenses that are likely to change based on how much you drive can be broadly categorized into two main areas: vehicle-related expenses and fuel-related expenses.

1. Vehicle-related expenses: The more you drive, the more wear and tear your vehicle will experience, leading to increased maintenance and repair costs. Regular oil changes, tire replacements, brake pad replacements, and other routine maintenance tasks will be required more frequently.

2. Fuel-related expenses: It's intuitive that the more you drive, the more fuel you'll consume, resulting in higher fuel expenses. Fuel prices can vary, but regardless of fluctuations, increased mileage will directly impact your fuel budget. Fuel-efficient vehicles may mitigate some of these costs, but the overall impact on your expenses will still be noticeable.

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Lines with arrows that point outward radiate from the charge in all directions.

step-1.For a positive point charge the lines will radiate out ward equally in all directions.

step-2.For a negative point charge the lines will point inward equally in all directions.

i hop this help :)

Answer:

Inertia

Explanation:

Your body is naturally resisting turning left, as it wants to continue straight. So if feels like you are going right.

Answer:

Because my body tries to continue in the rectilinear motion it was experiencing before the turn.

Explanation:

The body tries to continue in the rectilinear motion it was having before the hard left turn, in which a centripetal force is experienced. This is in agreement with Newton's first Law of motion:

"An object will remain at rest or in uniform motion in a straight line unless compelled to change its state by the action of an external force."

After 42 minutes, there are 203 x \(10^{20\) atoms remaining of the radioactive substance.

To determine the number of atoms remaining after a certain amount of time has passed, we can use the formula for radioactive decay:

N(t) = N0 * \((1/2)^{(t / T)\),

where:

N(t) = number of atoms remaining at time t,

N0 = initial number of atoms (812 x  \(10^{20\) atoms),

T = half-life of the substance (21 minutes), and

t = time that has passed.

Let's calculate the number of atoms remaining after a given time.

Suppose the time passed is t = 42 minutes (twice the half-life).

N(t) = 812 x  \(10^{20\) * \((1/2)^{(42 / 21)\)

N(t) = 812 x  \(10^{20\) * \((1/2)^2\)

N(t) = 812 x  \(10^{20\) * 1/4

N(t) = 203 x  \(10^{20\) atoms.

So, after 42 minutes, there are approximately 203 x \(10^{20\) atoms remaining of the radioactive substance.

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When a body of mass 12kg travelling at 4.2m/s² collides with a second body of mass 18kg at rest, their common velocity after the collision is 1.68 m/s.

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Answer:

the answer is 1.9......

Here are two examples of changes that can be created by thermal energy through friction:

1. Heating of materials: When two surfaces rub against each other, the friction between them can create heat. This is because the motion of the surfaces creates frictional forces that cause the atoms in the surfaces to vibrate and generate heat energy.

2. Wear and tear: Another change that can be created by thermal energy through friction is wear and tear on surfaces. When two surfaces rub against each other, the frictional forces between them can cause the surfaces to wear down over time.

Thermal energy is the energy that comes from the heat of a substance. It is a type of kinetic energy that is generated by the movement of atoms and molecules within a material. The faster the atoms and molecules are moving, the more thermal energy the substance has.

Nuclear fission and nuclear fusion are two different processes that involve the release of energy from the nucleus of an atom. Comparing and contrasting, we have:

1. Nuclear fission is the process in which the nucleus of an atom is split into two or more smaller nuclei, releasing a large amount of energy in the process. While nuclear fusion is the process in which two or more smaller atomic nuclei combine to form a larger nucleus, also releasing energy in the process.

2. Nuclear fission is typically fueled by heavy elements such as uranium-235, which is easily split apart by neutrons. Nuclear fusion, on the other hand, is typically fueled by light elements such as hydrogen.

3. Nuclear fission releases a large amount of energy per reaction, typically on the order of millions of electron volts (MeV). Nuclear fusion releases even more energy per reaction, typically on the order of billions of electron volts (GeV).

4. Nuclear fission produces radioactive waste, which can remain hazardous for thousands of years and must be carefully stored and disposed of. Nuclear fusion produces little to no radioactive waste, making it a potentially cleaner and safer source of energy.

5. Nuclear fission can pose a significant safety risk if not properly controlled, as demonstrated by accidents such as the Chernobyl and Fu-kushima disasters. Nuclear fusion, on the other hand, has not yet been demonstrated at a scale that would pose a significant safety risk.

6. Nuclear fission is a mature technology that has been used to generate electricity for decades, but it still faces public concerns regarding safety and waste disposal. Nuclear fusion, while a promising technology, is still in the experimental stage and has not yet been demonstrated at a commercial scale.

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The mass of air that will leave the room is 2.1 kg.

The number of moles of air in the room is calculated by applying Ideal gas law as shown below.

PV = nRT

where;

When the temperature =  25⁰C = 298 K

n = PV / RT

n = (121.8 x 33,000) / (8.314 x 298)

n = 1,622.3 moles

when  the temperature =  16.4⁰C = 289.4 K

n = PV / RT

n = (121.8 x 33,000) / (8.314 x 289.4)

n = 1,670.5 moles

difference in number of moles = 1,670.5 moles - 1,622.3 moles = 48.22 moles

mass of the air that will leave the room = 43.5 g/mol x 48.22 moles = 2,097.73 g = 2.1 kg

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The acceleration at the moment when the stone is left from the hand would be equal to:

a). g

Thus, option a is the correct answer.

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Answer:

B. A student asking others to join the leadership club.

Explanation:

A parent isn't a peer, therefore can't be peer pressure. Drinking is negative for your body, therefore not positive peer pressure. A teacher isn't a peer, therefore the only answer left is B.

Complete Question

The compete question is shown on the first uploaded question

Answer:

The speed is  \(  v  =  350 \  m/s \)  

Explanation:

From the question we are told that

   The  distance of separation is  d =  4.00 m  

  The distance of the listener to the center between the speakers is  I =  5.00 m

  The change in the distance of the speaker is by \(k  =  60 cm  =  0.6 \  m\)

    The frequency of both speakers is \(f =  700 \  Hz\)

Generally the distance of the listener to the first speaker is mathematically represented as

       \(L_1  =  \sqrt{l^2 + [\frac{d}{2} ]^2}\)

       \(L_1  =  \sqrt{5^2 + [\frac{4}{2} ]^2}\)

        \(L_1  =   5.39 \  m \)

Generally the distance of the listener to second speaker at its new position is  

          \(L_2  =  \sqrt{l^2 + [\frac{d}{2} ]^2 + k}\)

       \(L_2  =  \sqrt{5^2 + [\frac{4}{2} ]^2 + 0.6}\)

        \(L_2  =   5.64  \  m \)  

Generally the path difference between the speakers is mathematically represented as

        \(pD  = L_2 - L_1  =  \frac{n  *  \lambda}{2}\)

Here \(\lambda\) is the wavelength which is mathematically represented as

         \(\lambda =  \frac{v}{f}\)

=>    \( L_2 - L_1  =  \frac{n  *  \frac{v}{f}}{2}\)

=>    \( L_2 - L_1  =  \frac{n  *  v}{2f}\)  

=>    \( L_2 - L_1  =  \frac{n  *  v}{2f}\)  

Here n is the order of the maxima with  value of  n =  1  this because we are considering two adjacent waves

=>    \(  5.64 - 5.39   =  \frac{1  *  v}{2*700}\)      

=>    \(  v  =  350 \  m/s \)  

The speed of sound in air is 350 m/s

Since the distance between both speakers is 4 m, and the listener is standing 5 m away from halfway between them, the distance L from each loudspeaker to the listener, since the arrangement forms a right-angled triangle, using Pythagoras' theorem,

L = √[(5 m)² + (4/2 m)²]

= √[25 m² + (2 m)²]

= √[25 m² + 4 m²]

= √29 m² = 5.39 m.

Now, when one speaker is moved 60 cm = 0.6 m away from its original position, its distance from the listener is now

L' = √[(5 m)² + (4/2 + 0.6 m)²]

= √[25 m² + (2 m + 0.6 m)²]

= √[25 m² + (2.6 m)²]

= √[25 m² + 6.76 m²]

= √31.76 m²

= 5.64 m.

Now, the path difference when we first have destructive interference is

ΔL = L' - L

= 5.64 - 5.39

= 0.25

Since we have destructive interference for the first time when the speaker is moved, the path difference, ΔL = (n + 1/2)λ where λ = wavelength = v/f where v = speed of sound in air and f = frequency = 700 Hz.

Now, since we have destructive interference for the first time, n = 0.

So,  ΔL = (n + 1/2)λ

ΔL = (0 + 1/2)v/f

ΔL = v/2f

Making v subject of the formula, we have

v = 2fΔL

Substituting the values of the variables into the equation, we have

v = 2fΔL

v = 2 × 700 Hz × 0.25 m

v = 350 m/s

So, the speed of sound in air is 350 m/s

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Two forces f1=(8i+3j)N and f2=(4i+6j) are acting on 5kg object then  the magnitude of the resultant force is 15 N and the direction of the resultant force is approximately 36.87 degrees from the positive x-axis.

The acceleration of the object in the x-component (\(a_x\)) is 2.4  \(m/s^{2}\), and the acceleration in the y-component (\(a_y\)) is 1.8  \(m/s^{2}\).

The magnitude of the acceleration of the object is 3  \(m/s^{2}\).

To find the magnitude and direction of the resultant force, we need to add the two given forces together.

Given:

f1 = (8i + 3j) N

f2 = (4i + 6j) N

To find the resultant force (\(F_res\)), we simply add the corresponding components:

\(F_res\) = f1 + f2

= (8i + 3j) + (4i + 6j)

= (8 + 4)i + (3 + 6)j

= 12i + 9j

The magnitude of the resultant force (\(|F_res|\)) can be found using the Pythagorean theorem:

\(|F_res|\)= \(\sqrt{(12^2) + (9^2)}\)

= \(\sqrt{144 + 81}\)

= \(\sqrt{225}\)

= 15 N

So, the magnitude of the resultant force is 15 N.

To find the direction of the resultant force, we can use trigonometry. The direction can be represented by the angle θ between the positive x-axis and the resultant force vector. We can calculate θ using the inverse tangent function:

θ = arctan(9/12)

= arctan(3/4)

≈ 36.87 degrees

Therefore, the direction of the resultant force is approximately 36.87 degrees from the positive x-axis.

Now let's calculate the acceleration of the object in the x and y components. We know that force (F) is related to acceleration (a) through Newton's second law:

F = ma

For the x-component:

\(F_x\)= 12 N

m = 5 kg

Using  \(F_x\)= \(ma_x\), we can solve for \(a_x\):

12 N = 5 kg * \(a_x\)

\(a_x\)= 12 N / 5 kg

\(a_x\) = 2.4 \(m/s^{2}\)

For the y-component:

\(F_y\) = 9 N

m = 5 kg

Using \(F_y\) = \(ma_y\), we can solve for \(a_y\):

9 N = 5 kg * \(a_y\)

\(a_y\) = 9 N / 5 kg

\(a_y\)= 1.8  \(m/s^{2}\)

So, the acceleration of the object in the x-component (\(a_x\)) is 2.4  \(m/s^{2}\), and the acceleration in the y-component (\(a_y\)) is 1.8  \(m/s^{2}\).

To find the magnitude of the acceleration (|a|), we can use the Pythagorean theorem:

|a| = \(\sqrt{(a_x^2) + (a_y^2)}\)

= \(\sqrt{(2.4^2) + (1.8^2}\)

= \(\sqrt{5.76 + 3.24}\)

= \(\sqrt{9}\)

= 3  \(m/s^{2}\)

Therefore, the magnitude of the acceleration of the object is 3  \(m/s^{2}\)

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Answer:

Choice 2: 6/17

Explanation:

4+7=11. 6+11= 17. so it's 6/17

The second collision occurs 159.279 cm from the end of the track.

We will use conservation of momentum and conservation of kinetic energy to solve for the velocities:

Conservation of momentum:

we have:

-41.25 kg*cm/s = 0.55 kg v1f + 0.36 kg v2f ... equation 1

conservation of kinetic energy :

1729.69 kg*cm^2/s^2 = 0.3025 kg v1f^2 + 0.162 kg v2f^2 ...equation 2

Solving for both velocities, we have:

v1f = -45 cm/s

v2f = 58.636 cm/s

Now we will use the time it takes for the target glider to travel from its initial position to the end of the track and back to find the distance from the end of the track where the second collision occurs:

The distance the target glider travels during this time is:

d2 = v2f t = (58.636 cm/s)(1.815 s) = 106.279 cm

in conclusion, the distance from the end of the track where the second collision occurs is:

53 cm + d2 = 159.279 cm from the end of the track.

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In order to determine which orientation results in a larger depolarization factor for the similar dielectric ellipsoids placed in an electric field, we need to consider the shape and alignment of the ellipsoids with respect to the electric field.

The depolarization factor measures the reduction in the electric polarization of a material due to its shape and alignment in an electric field. It is influenced by the geometry of the material and how it interacts with the electric field.

Qualitatively, if the ellipsoids are aligned in such a way that their major axes are parallel to the electric field lines, the depolarization factor would be smaller. This is because the electric field would act along the long axis of the ellipsoid, resulting in less distortion of the polarized charges inside the material. The polarization would be more effectively aligned with the electric field, minimizing the depolarization effect.

On the other hand, if the ellipsoids are oriented such that their major axes are perpendicular or at an angle to the electric field lines, the depolarization factor would be larger. In this case, the electric field would act in a direction that is not aligned with the major axis of the ellipsoid, causing more distortion and misalignment of the polarized charges inside the material. This results in a larger depolarization effect.

Without a specific diagram or more information about the orientations shown in Figure P5.5, it is difficult to determine the exact orientation with the larger depolarization factor. However, based on the general understanding of the relationship between alignment and the depolarization effect, the orientation where the major axes of the ellipsoids are perpendicular or at an angle to the electric field lines is likely to result in a larger depolarization factor.

The power to stop the car with kinetic energy of a car is  \(8*10^{6} J\) as it travels along a horizontal road is  \(8*10^{5} watt\), option B

Kinetic energy can be seen as one that is been recorded when an object is able to move from a place , in a broad term we can say this is the energy that can be attributed to that of someone leaving a place and go to another place hence we can see it as the one in the motion.

The definition of energy as the "power to accomplish work" refers to the capacity to apply a force that moves an object. Even if the word is vague, it is clear what energy actually means: it is the force that causes objects to move. The two types  can be attributed to the one we know which are kinetic and potential energy.

\(Power \frac{Energy}{time}\)

\(Energy = 8*10^{6} J\)

\(time = 10 s\)

\(Power = \frac{8*10^{6} J}{10}\)

\(power = 8*10^{5} watt\)

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proper question;

The kinetic energy of a car is 8 × 106 J as it travels along a horizontal road. How much power is required to stop the car in 10 s? (A) zero joules (B) 8  105 J (C) 8  107 J (D)8  104 J (E) 8  106 J​

Answer: Vx is changing  and  Vx is greatest near the beginning of the launch.

Explanation: Think of Vx as a bullet fired from a gun. As soon as it is fired it starts to slow down so Vx is changing and at the beginning Vx has its greatest velocity because it can only go slower from there.

answers are B and C. horizontal velocity never changes so A cannot be the answer. that makes B one of the answers. I would also say that the horizontal velocity is greatest near the beginning of the launch as it just starts, since it stays at a constant pace after, so D is not an answer. hope this helps ^_^

Answer:

I think it depends on the purpose of using Gamma rays. It can be both good and bad

To determine the magnitude of the lift force ⃗ and the force of air resistance ⃗ acting on the jet, we need to resolve the weight ⃗ and the forward thrust ⃗ into their horizontal and vertical components.

The weight ⃗ can be resolved into two components:

- the vertical component, Wsin(30°), acting downward

- the horizontal component, Wcos(30°), acting to the left

The forward thrust ⃗ can also be resolved into two components:

- the vertical component, Tsin(30°), acting upward

- the horizontal component, Tcos(30°), acting to the right

Since the jet is flying at a constant speed, the lift force ⃗ must be equal in magnitude to the weight component acting downward, Wsin(30°). Therefore, the magnitude of ⃗ is 86,500 Nsin(30°) = 43,250 N.

The force of air resistance ⃗ is equal in magnitude to the horizontal component of the weight, Wcos(30°), minus the horizontal component of the forward thrust, Tcos(30°). Therefore, the magnitude of ⃗ is (86,500 Ncos(30°)) - (103,000 Ncos(30°)) = -8,715 N, where the negative sign indicates that the force of air resistance is acting in the opposite direction to the motion of the jet.

Therefore, the magnitude of the lift force ⃗ is 43,250 N and the magnitude of the force of air resistance ⃗ is 8,715 N.

Cheese is made of casein protein, which is originally made from milk and is high in protein. The texture of the cheese is determined by the quality of the milk, so cow's milk cheese differs from goat's milk cheese.

Diary products are made from milk, such as cheese, curd, yogurt, etc., but all of them have different nutrients. The quality of these dairy products depend upon the quality of the milk, as some milking animals have a higher concentration of fats in their milk than other animals. These dairy products are used in different industrial sectors, such as for making ice cream, chocolate, and different food products.

Hence, cheese is made up of casein proteins that are present in the milk.

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Answer:

The speed of a wave is equal to the wavelength divided by the period. The wavelength is the distance between two consecutive nodes, and the period is the time it takes for one complete cycle of the wave.

In this case, the wavelength is 6 m and the period is 0.2 s. Therefore, the speed of the wave is 30 m/s.

The answer is 30 m/s.

Explanation:

The power of the motor can be calculated by dividing the work done (2400J) by the time taken (2 minutes). Therefore, the power of the motor is 2400J/120s = 20W.

Motor is a mechanical or electrical device that converts energy into motion. Motors are used in a variety of applications, including industrial, commercial, and residential. Examples of motors include electric motors, steam engines, and internal combustion engines. Electric motors use electrical energy to produce rotational mechanical energy, while steam engines produce rotational mechanical energy through the use of steam pressure. Internal combustion engines produce rotational mechanical energy through the combustion of fuel. Motors are used in a variety of applications, ranging from powering household appliances to running industrial machinery. In addition, motors are used to power various types of transportation, such as cars and boats. Motors are also used to power robotics in a variety of industries, including manufacturing and healthcare.

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Elements are arranged on the periodic table in terms of valence electrons based on their atomic number and electron configuration.

1. Elements are arranged on the periodic table in terms of valence electrons based on their atomic number and electron configuration. The valence electrons are the outermost electrons in an atom's electron shell, and they are crucial in determining the chemical properties and reactivity of elements.

2. Evidence from data tables can be shown by examining the electron configuration and the group and period numbers of various elements on the periodic table. Here is a simplified example:

Element   | Electron Configuration | Group | Period |

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

Hydrogen  | 1s^1                              | 1     | 1      |

Lithium       | [He] 2s^1                     | 1     | 2      |

Carbon       | [He] 2s^2 2p^2          | 14    | 2      |

Oxygen      | [He] 2s^2 2p^4          | 16    | 2      |

Neon          | [He] 2s^2 2p^6          | 18    | 2      |

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

3. The evidence from the data table supports the claim that the arrangement of elements on the periodic table is based on valence electrons.

- Group Trend: Elements within the same group (vertical columns) share the same number of valence electrons. In the example table, Hydrogen, Lithium, and Neon are all in Group 1, indicating they have 1 valence electron.

- Period Trend: Elements within the same period (horizontal rows) have the same number of electron shells. In the example table, Hydrogen and Lithium are in Period 1, indicating they have their valence electron in the first energy level. Carbon, Oxygen, and Neon are in Period 2, indicating they have their valence electrons in the second energy level.

By examining the electron configurations, group numbers, and period numbers, we can clearly see the trends and patterns in the number of valence electrons for both groups and periods on the periodic table. This evidence supports the claim that the arrangement of elements on the periodic table is based on their valence electrons, which play a crucial role in determining their chemical behavior and properties.

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