How does the Sun's mass compare with that of the planets?

a. It is about as massive as all the planets combined.

b. It is about a hundred times more massive than all the planets combined.

c. It is about a hundred times more massive than Earth.

d. It is about a thousand times more massive than Earth.

e. It is about a thousand times more massive than all the planets combined.

Answer:

Liquid

Explanation:

To turn liquid into gas, you add heat, to remove heat from gas, you make liquid.

To accommodate both telecommunications and power cables in a cable tray or cable runway, they must be separated, as mandated by the National Electrical Code (NEC).

The National Electrical Code (NEC) sets standards for electrical installations to ensure safety and proper functioning. According to NEC guidelines, telecommunications and power cables should be physically separated when placed in a cable tray or cable runway. This separation is necessary to prevent interference and potential hazards. Telecommunications cables carry data signals, while power cables carry electrical currents. When these cables are in close proximity, there is a risk of electromagnetic interference (EMI) from the power cables affecting the data signals in the telecommunications cables. This interference can lead to signal degradation and communication errors. Additionally, power cables carry high voltage, which poses a safety hazard if there is a fault or short circuit. Therefore, by keeping telecommunications and power cables separated in cable trays or runways, the risk of interference and safety concerns is minimized, ensuring proper functionality and compliance with the NEC.

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As stars get bigger and brighter, the closer they are to their end of life.

Because they have already used all the elements they can in nuclear fusion. Iron cannot be fused, its too heavy.

The most accurate graph here would be the third one.

Answer:

protected under students first amendment rights

Explanation:

did the studyisland :)

The evaporation of the jogger's sweat is a process that leads to an increase in the entropy of the surroundings. This is because when water evaporates, its molecules become more disordered and spread out, increasing the randomness of the system. However, the jogger's body experiences a decrease in entropy as it loses water in the form of sweat.

Overall, the change in entropy of the universe will depend on the relative magnitudes of these two opposing effects.

Without more information about the jogger's surroundings and the details of the evaporation process, it is not possible to determine the sign or magnitude of the entropy change. It is possible that the decrease in entropy of the jogger's body is more significant than the increase in entropy of the surroundings, leading to a negative change in entropy of the universe. Alternatively, the increase in entropy of the surroundings could be more significant, resulting in a positive change in entropy. Without more information, the answer is not able to be determined with the given information.

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Answer:

Which sentence best states the central idea of paragraphs 21-22 in "Energy Story"?

A. Materials that are insulators and conductors have a high

resistance to electricity.

Part B

Which sentence from "Energy Story" best supports the answer in Part A?

B. "Its resistance measures how well something conducts

electricity."

Explanation:

Answer:

The cars would both move in the direction with the greatest momentum.  We know the truck would have the greatest momentum due to having the greatest mass. Plus, factors which affects momentum are mass and velocity.    

Thus, the car would move forward towards the direction of momentum of the truck. Both will continue to move at the same velocity.

E.g. truck hits the back of a stationary car, both will move forward, to the right & travelling at the same speed, but lower than the initial velocity of the truck. Now the total the total momentum before the collision is the same as the total momentum after the collision; as a result, momentum has been conserved.

Hope this helps!

Answer:

La fuerza resultante sobre q₃ es  -1.2245 × 10⁻¹⁵ i  + -0.24 × 10⁻¹⁵ j

La magnitud de la fuerza resultante sobre q₃ es aproximadamente 1.25 × 10⁻¹⁵ N

Explanation:

q₁ = -45 μC = -45 × 10⁻⁶ C

r₁₂ = 30 mm = 30 × 10⁻³ m

q₂ = 25 μC = 25 × 10⁻⁶ C

r₂₃ = 50 mm = 50 × 10⁻³ m

q₃ = 20 μC = 20 × 10⁻⁶ C

k = 9×10⁻⁹ N·m²/C²

Por lo tanto;

r₁₃ = √(50² + 30²) = 10·√(34)

F₁₂ = 9×10⁻⁹ × (-45 × 10⁻⁶)×(25 × 10⁻⁶)/(30 × 10⁻³)² = -1.125 × 10⁻¹⁴

F₁₂ = -1.125 × 10⁻¹⁴ N

F₂₃ = 9×10⁻⁹ × (20 × 10⁻⁶)×(25 × 10⁻⁶)/(50 × 10⁻³)² = 1.8 × 10⁻¹⁵ j

F₁₃ = 9×10⁻⁹ × (-45 × 10⁻⁶)×(20 × 10⁻⁶)/(10·√34 × 10⁻³)² = -2.38× 10⁻¹⁵

Los componentes de F₁₃ son;

-2,38 × 10⁻¹⁵ × cos (arctan (30/50)) = -2,04 × 10⁻¹⁵ j

-2,38 × 10⁻¹⁵ × sin (arctan (30/50)) = -1,2245 × 10⁻¹⁵ i

La fuerza resultante sobre la carga q₃, \(\left | \underset {F_3} \rightarrow \right |\) = \(\underset{F_{13}}{\rightarrow}\) + \(\underset{F_{23}}{\rightarrow}\)

∴ \(\left | \underset {F_3} \rightarrow \right |\) = 1.8 × 10⁻¹⁵ j + -1.2245 × 10⁻¹⁵ i + -2.04 × 10⁻¹⁵ j

La fuerza resultante sobre q₃ es \(\left | \underset {F_3} \rightarrow \right |\)  = -1.2245 × 10⁻¹⁵ i  + -0.24 × 10⁻¹⁵ j

La magnitud de la fuerza resultante sobre q₃,

\(\left | F_3 \right |\) = √((-1.2245 × 10⁻¹⁵)² + (-0.24 × 10⁻¹⁵)²) ≈ 1.25 × 10⁻¹⁵

La magnitud de la fuerza resultante sobre q₃, \(\left | F_3 \right |\) ≈ 1.25 × 10⁻¹⁵ N.

Answer:

distance of compression: 0.07071 m

Explanation:

\(\sf energy = \dfrac{1}{2} kx^2\)

\(\rightarrow \sf 0.5= \dfrac{1}{2} (200)x^2\)

\(\rightarrow \sf 0.5= (100)x^2\)

\(\rightarrow \sf 5\ *\ 10^{-3}= x^2\)

\(\rightarrow \sf x = \sqrt{5\ *\ 10^{-3}}\)

\(\rightarrow \sf x =0.07071 \ m\)

Answer:

B. less than mg

Explanation:

A person's weight changes as he rides an elevator at a constant velocity. If the elevator is moving downward, the person's weight becomes lesser. He is considered to be in "free fall" due to gravity. However, the opposite happens when the elevator goes upward. The person will feel heavier because he is going against gravity. This means his weight is more than his actual weight. If the person will stand on an elevator that doesn't move, his weight will just be the same. All of these is due to Newton's Second Law of Motion where an object's acceleration relies on its force and mass.

The magnitude of the angular velocity of a particle whirling about a circular path of radius 44m with a tangential velocity of magnitude 24 m / s is 0.55 rad / s

v = r ω

v = Tangential velocity

r = Radius

ω = Angular velocity

r = 44 m

v = 24 m / s

ω = v / r

ω = 24 / 44

ω = 0.55 rad / s

Tangential velocity is also known as linear velocity. So the linear velocity value multiplied by the radius of the curve gives the value of angular velocity which is represented using the unit rad / s.

Therefore, the magnitude of the angular velocity is 0.55 rad / s

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They have a limited supply in nature, therefore if they are used excessively, they will become exhausted.

Today, we recognise that using fossil fuels has a negative impact on the environment. Fossil fuels produce and utilise local pollutants, and their continued use permanently alters the temperature of our entire world.

Wastes from combustion sources are those that result from carbon pollution (i.e., coal, oil, natural gas). Included in this are all ash and particles taken out of the flue gas.

The fossile fuel is limited in nature. So, it should not waste energy from fossil fuels.

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True, Proton Nuclear Magnetic Resonance (1H NMR) spectroscopy is a method used to determine the structure of molecules by analyzing the behavior of hydrogen-1 nuclei in the presence of a magnetic field.

Proton Nuclear Magnetic Resonance (1H NMR) spectroscopy is a method of analyzing the behavior of hydrogen-1 nuclei in a substance when exposed to a magnetic field. It is a type of Nuclear Magnetic Resonance (NMR) spectroscopy, which is a powerful analytical tool used to study the structure and composition of molecules.

In 1H NMR spectroscopy, the hydrogen atoms within a sample are subjected to a magnetic field, and the energy levels of the hydrogen nuclei are then observed as they change in response to radio frequency (RF) pulses. The resulting NMR spectrum provides information about the types of hydrogen atoms in the sample, the chemical environment in which they are found, and their interactions with other atoms in the molecule.

1H NMR spectroscopy is a widely used technique in various fields, including chemistry, biochemistry, pharmaceuticals, and food science, as it allows for the rapid and non-destructive analysis of molecular structure and composition.

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Answer:

The acceleration is 2 m/s² in Camila's direction.

Explanation:

The acceleration can be found using the following equation:

\( \Sigma F = ma \)

Where

F is the force

m is the mass of the taffy = 1.5 kg

a is the acceleration =?

Since Emma pulls one end of the taffy with 20 N and Camila pulls the other end with 23 N we have:

\( F_{C} - F_{E} = ma \)

\(23 N - 20 N = 1.5 kg*a \)

\( a = 2 m/s^{2} \)

Hence, the acceleration is 2 m/s² in Camila's direction.

I hope it helps you!

Answer:

sound travels faster in the night

Explanation:

a) The angular frequency of the oscillations = 11.09 rad/s

b) The period of the oscillations = 0.567 s

c) The total energy of the system is 0.3 J.

d) The maximum kinetic energy of the object is 0.3 J.

(a) The angular frequency of the oscillations can be found using the formula:

ω = √(k/m)

where k is the force constant of the spring and m is the mass of the object. Substituting the given values, we get:

ω = √(610 N/m / 2.5 kg) = 11.09 rad/s

(b) The period of the oscillations can be found using the formula:

T = 2π/ω

Substituting the value of ω from part (a), we get:

T = 2π/11.09 rad/s = 0.567 s

(c) The total energy of the system is the sum of the kinetic energy and the potential energy. At the maximum displacement, all the energy is potential energy and at the equilibrium position, all the energy is kinetic energy. Therefore, the total energy is constant and equal to the potential energy or kinetic energy at any point in the oscillation.

The potential energy of the spring at maximum displacement is:

U = (1/2)kx²

where x is the amplitude of the oscillation. Substituting the given values, we get:

U = (1/2)(610 N/m)(0.031 m)² = 0.3 J

Therefore, the total energy of the system is 0.3 J.

(d) The maximum kinetic energy of the object is equal to the total energy minus the maximum potential energy. Therefore, we have:

K_max = E_total - U_max

where U_max is the potential energy at the equilibrium position, which is zero. Substituting the values, we get:

K_max = 0.3 J - 0 J = 0.3 J

Therefore, the maximum kinetic energy of the object is 0.3 J.

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Answer:

see below

Explanation:

a. 0.1886 x 12 =2.2632

This has 2 sig figures so the answer can only have 2 sig figures

2.3

b. 2.995 - 0.16685 =2.82815

The most accurate in the problem is to thousands place so our answer can only be accurate to the thousands place

2.828

c. 910 x 0.18945=172.3995

The  least number of significant figures is 3 so the answer can only have 3 significant figures

172

Approximately 30 m/s (67 mph) wind speed is needed to tip over the 55-gallon drum.

The critical wind speed needed to tip over the drum can be estimated using the formula:

\(V = (5/2*(h/d)*(W/m))^(1/2)\)

where V is the critical wind speed, h is the height of the drum, d is the diameter of the drum, W is the weight of the drum, and m is the mass of the drum.

Converting the given values to SI units, we get:

\(h = 0.8763 md = 0.5715 mW = 214.5 Nm = 21.77 kg\)

Substituting these values in the formula, we get:

\(V = (5/2*(0.8763/0.5715)*(214.5/21.77))^(1/2) ≈ 30 m/s\)

Therefore, approximately 30 m/s (67 mph) wind speed is needed to tip over the 55-gallon drum.

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Answer:

C

Explanation:

So im not saying this is 100% the answer but from what i read everything else was an inference and watching bubbles form when mixing chemicals made more sense as a observation to me

Given values:

Mass of the steel ball, m = 100 g = 0.1 kg

Height of the steel ball, h1 = 1.8 m

Rebound height, h2 = 1.25 m

a.  PE= mgh

0.1 x 9.8 x 1.8 =

1.764 Joules

b. KE = PE ->

1.764 Joules

c. KE= 1/2 mv square

so v = square root 2ke/m

square root 2 x 1.764/ 0.1

= 5.93 m/s

d. KE=PE=mgh square

0.1 x 9.8 x 1.21 =

1.186 joules

velocity of rebond is square root 2x 1.186/ 0.1 = 4.87 m/s

It makes a distinct "clang", even if there is nobody there to hear it.

In anthropological terms, _Kinship_____ is the means by which a person determines their kin relations over the course of past and future generations.

Kinship is the term which anthropologists define kin relations over generations.

Kinship includes blood, marriage, and other social links. It includes people's intricate family links and determines their social status.

Kinship systems help anthropologists analyse family structures, inheritance patterns, marital practises, and societal roles. Genealogies, oral histories, and cultural practises reveal kinship.

Understanding kinship is crucial in anthropological research as it provides insights into social organization, cultural norms, and the transmission of resources, rights, and obligations within a given society. It helps anthropologists understand how people define and navigate family ties, both past and future.

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Answer:

D. The oxygen side is partially negative because electrons are pulled toward the oxygen side.

Explanation:

The water molecule is polar by the virtue of covalent bonds and the hydrogen bonds within and between its molecule.

The oxygen side is partially negative because the electrons are pulled toward the oxygen side.

Between oxygen and hydrogen that makes up the water molecule, oxygen is more electronegative.

An electronegative atom has more affinity for electrons. Since the electrons in the molecule of water is shared between hydrogen and oxygen, the more electronegative specie which is water draws the electron more to itself.

This leaves a net negative charge on the oxygen atom.

The answer is 0.4 m³, in order to float, the boat must displace its own mass in water.

Since the boat weighs 10,000,000 kg, and water has a density of 1000 kg/m3, the boat must displace

(10,000,000 kg) / (1000 kg/m³)

= 10,000 m³ of water in order to float.

(Or 10⁴ m³, as written above)

Surface tension is the propensity for liquid surfaces that are at rest to condense into the smallest surface area. Razor blades and insects (like water striders), which have a higher density than water, can float on the surface of the water without even partially submerging due to surface tension. Typically, there are two forms of density: absolute density and relative density. The ratio of a substance's density to the density of a reference material is known as its relative density, sometimes referred to as specific gravity.

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Answer:

The Celestial Sphere

Explanation:

No matter where you are on Earth, stars appear to rotate about a point called the celestial pole.

Here's how it works:

Rotation of Earth: The Earth rotates on its axis from west to east. This rotation takes approximately 24 hours to complete one full rotation.

Celestial Poles: The celestial poles are imaginary points in the sky directly above the Earth's geographic poles. The North Celestial Pole is located directly above the Earth's North Pole, and the South Celestial Pole is located directly above the Earth's South Pole.

Apparent Motion: As the Earth rotates, the stars that are closer to the celestial poles appear to move in small circles around these poles. The stars that are farther away from the poles will have larger apparent circles.

Constellations and Circumpolar Stars: The constellations located near the celestial poles are known as circumpolar constellations. This means that they never fully set below the horizon from a specific location on Earth.

Equator and Horizon: The stars that are situated near the celestial equator (an imaginary line that's an extension of Earth's equator into the sky) will rise in the east, arc across the sky, and set in the west, much like the Sun does.

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Answer:

False. Not everything can turn into a black hole. The formation of a black hole requires a massive object, typically a star, to collapse under its own gravity. This collapse causes the object to become so dense that it creates a singularity, a point of infinite density at the center of the black hole, which is surrounded by an event horizon, the point of no return beyond which nothing, not even light, can escape. So, only objects with sufficient mass and gravity can become black holes.

Explanation:

Wind-generated gravity waves are divided into two categories based on depth of the water they travel in comparison to their wavelength.

Wavelength is the distance between identical points (adjacent crests) in the adjacent cycles of a waveform signal propagated in space or along a wire. Therefore,

To start a gravity wave, a TRIGGER mechanism must cause the air to be displaced in the vertical.

Examples of trigger mechanisms that produce gravity waves are mountains and thunderstorm updrafts. To generate a gravity wave, the air must be forced to rise in stable air.

Generation of ocean waves by wind, Wind-generated waves on the water surface are examples of gravity waves, as are tsunamis and ocean tides

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