The caloris basin on mercury covers a large region of the planet, but few craters have formed on top of it. from this we conclude that the :_________.
i. caloris basin was formed by a volcano.
ii. erosion destroyed the smaller craters that formed on the basin. only very large impactors hit mercury's surface in the past.
iii. the caloris basin formed toward the end of the solar system's period of heavy bombardment.
iv. mercury's atmosphere prevented smaller objects from hitting the surface.

Answer:

34 m/s

Explanation:

Momentum=mass × velocity

Velocity = momentum / mass

= 40120/1180

=34 m/s

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To outside observers at rest, the overall sizes of objects traveling at relativistic speeds are smaller.

The mathematical sign for light speed, "c," or relativistic speed, is approximately 186,282 miles per second. As a result, relativistic speed refers to the rate at which such effects are crucial for obtaining the proper level of measurement accuracy for the event under consideration. the discrepancies between values computed using relativity-based theories.

sizes of objects, in general, refers to a thing's size or magnitude. More specifically, the terms "geometrical size" or "spatial size" can be used to describe area, volume, or linear dimensions. Mass can also be used to estimate size, particularly when a range of densities is assumed. A file's actual space on a disc is represented by its sizes of objects. A file's logical and physical dimensions can match.

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Answer:

B

A

A

B

Explanation:

In the wiring of houses, a parallel circuit is used, otherwise, if the circuit of one of the parts is interrupted, the current will not enter the other circuits.

Answer:

m1=100kg

m2=6×10^24kg

r=6400km

G=6.6×10^-11

F=?

as we know that

F=G m1.m2/r²

F=6.6×10^-11×100×6×10^24/(6400)²

F=6.6×10^-11×6×10^26/4.096×10^7

F=6.6×10^-11×1.465×10^19

F=9.67×10^8N

The given reaction is a nuclear reaction hat involves the emission of helium nucleus

Reason:

First part:

The given nuclear reaction is presented as follows;

\(\dfrac{225}{88} Ra \longrightarrow \dfrac{4}{2} He + \dfrac{222}{[\ ]} Rn\)

The value for the missing box; Required

Solution:

Let x represent the number in the missing box

Where the protons are conserved, the atomic number of the reactants and product are equal

Therefore, we have;

88 = 2 + x

∴ x = 88 - 2 = 86

x = 86

The missing box would be the number 86

Second part:

The nuclear reaction involves the emission of an helium nucleus from radium, Ra, to form a radon, Rn

The emission of an Helium nucleus (alpha particle) is a form of alpha decay

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Answer:

box A: 86

Box B: Alpha

Answer:

A)

Explanation:

Energy transformation is when energy changes from one form to another.

The word "thermodynamics" stems from a Greek expression related to the movement of heat and thermal mechanics.

The word "thermodynamics" is derived from two Greek words: "thermo" meaning heat, and "dynamics" meaning movement. Together, they represent the study of the movement of heat and its relationship with other forms of energy. Thermodynamics encompasses the principles and laws that govern the behavior of energy, particularly heat energy, in systems. It deals with topics such as temperature, pressure, energy transfer, and the conversion of heat into work. The word highlights the central focus of thermodynamics on the movement, transfer, and transformation of thermal energy in various systems and processes.

Thermodynamics is derived from the Greek words "thermo" (meaning heat) and "dynamis" (meaning power or movement). Therefore, the term "thermodynamics" refers to the study of the movement or transfer of heat and its relationship with energy and work. It encompasses the principles and laws that govern the behavior of energy and heat in various systems.

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Answer:

salt

Explanation:

Answer:

(Salt) would be the soluble component.

The stars that account for 90% of the luminosity are typically those with masses greater than or equal to 1.5 solar masses.

These are called main-sequence stars, and they are characterized by their high luminosities and temperatures.

The spectral type that corresponds to this mass threshold is typically A or B type stars. A-type stars have temperatures between 7,500 K and 10,000 K, and are known for their bright, bluish-white appearance. B-type stars have temperatures between 10,000 K and 30,000 K, and are known for their blue-white to blue-violet appearance. These stars are generally located in the upper-left corner of the Hertzsprung-Russell (HR) diagram and are among the most luminous stars in the universe.

It is worth noting that there are some outliers, such as luminous blue variables (LBVs), which are much more luminous than typical main-sequence stars but are rare and short-lived. Additionally, some evolved stars, such as red giants and supergiants, can also have high luminosities despite being less massive than 1.5 solar masses.

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Answer: They have different rigidities.

Explanation:

Since the mass is not present, the tension in the rope T = 0 N.

Tension, in physics, is be defined to be the pulling force transmitted axially by the means of a string, a rope, chain, or similar object. The opposite of tension could be compression.

At the atomic level, when atoms/molecules are pulled apart from each other and gain potential energy with a restoring force still existing, the restoring force might create tension.

Tension is a pulling force since it is exerted when a mass being pulled by a rope or a similar object. If the mass is not present, then there is no tension (pulling force) exerted by the rope, hence T = 0 N.

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Since Harry and Sue cycle at the same speed (linear speed), Sue's bike wheels with the smaller diameter will have a greater rotational speed.

Here's a step-by-step explanation:

1. Linear speed (v) is related to rotational speed (ω) and wheel radius (r) through the equation v = ωr.
2. When Harry and Sue cycle at the same linear speed, v_Harry = v_Sue.
3. Considering the equation v = ωr, we can say ω_Harry * r_Harry = ω_Sue * r_Sue.
4. Since Harry's bike has a larger diameter (and radius) than Sue's bike, r_Harry > r_Sue.
5. As a result, to maintain the same linear speed, Sue's wheels must rotate faster, so ω_Sue > ω_Harry.

In conclusion, Sue's bike wheels have a greater rotational speed than Harry's bike wheels when they cycle at the same linear speed.

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Explanation:

v=u+at, where v,u,a and t are the final velocity, initial velocity, acceleration and time, respectively.

For t=0 s to t=30 s , a =8 m/s 2.

For t=30 s to t=50 s , a = 5 m/s 2.

For t=50 s to t=110 s , a = 0 m/s 2.

For t=110 s to t=130 s , a is such that the body comes to rest at the end of this period.

For t=0 s to t=30 s ,v=0+8t⇒v=8t m/s.

At t=30s,v=8×30=240 m/s.

For t=30 s to t=50 s ,v=240+5(t−30)⇒v=90+5t m/s

At t=50s,v=90+5×50=340 m/s.

For t=50 s to t=110 s ,v=340 m/s.

For t=110 s to t=130 s ,v=340+a(t−110).

The body comes to a halt at t=130 s ⇒0=340+a(130−110).

0=340+20a⇒a=−34020=−17 m/s2.

For t=110 s to t=130 s ,v=340−17(t−110)=2210−17t m/s.

Answer:

hydrochlorine +12÷B to the power of 4 -× y reapeated zminus 2 to the power of 9

Answer:

remains constant but non-zero

Explanation:

the force you apply will increase but in the question it stated a non-moving wall hence making it non- zero .

Answer:

j

Explanation:

If a composite object is electrically neutral, that means it has an equal number of positive and negative charges.

Electricity is a form of energy that results from the movement of charged particles, such as electrons. It is the flow of electric charge through materials that conduct electricity, such as metals. Electricity has several key properties, including voltage, which is a measure of the energy per unit charge, and current, which is the flow of charge through a material. Electricity can be generated through a variety of methods, including chemical reactions, thermal processes, and electromagnetic induction. It is used to power a wide range of devices and systems, from light bulbs and computers to power plants and electric vehicles. Electricity has revolutionized the world, making it possible to transmit energy over long distances, power machines, and communicate instantly with people anywhere on the planet.

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Answer:

Equality is the state of being equal in rights word and oportunities

"In Model 1, the source of bacteria in the culture tube is from the initial bacteria culture that was used to inoculate the tube.

This is because bacterial culture tubes are used to grow and maintain microorganisms such as bacteria, viruses, or fungi by supplying them with the nutrients and conditions necessary for their growth and reproduction. These organisms can be obtained from a variety of sources, including soil, water, and other organic matter. In the experiment represented by Model 1, a bacterial culture was used to inoculate a culture tube. The bacteria then grew and reproduced in the nutrient-rich environment of the culture tube, resulting in an increase in the bacterial population. Therefore, the initial source of bacteria in the culture tube is from the inoculated bacterial culture. Hence, the source of bacteria in the culture tube in model 1 is from the initial bacteria culture that was used to inoculate the tube.

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The density of the cube of wood placed in the tub of water is determined as 700 kg/m³.

The specific gravity of the wood is the fraction of the entire wood volume below water surface.

Height below water surface = 20 cm - 6 cm = 14 cm

S.G = 14 cm/20 cm

S.G = 0.7

The density of the wood is calculated with respect to density of water.

S.G = ( density of wood) / (density of water)

0.7 =  (density of wood) / (1000 kg/m³)

density of wood = 0.7 x 1000 kg/m³

density of wood = 700 kg/m³

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The angular displacement is 49.793 rad.

Given,

ω = angular velocity = 4.7 rad/s

acceleration = 8.6 rad/s²

time = 2.9 s

angular displacement = θ

θ = ωt + 1/2 at²

θ = (4.7)(2.9) + 1/2(8.6)(2.9)²

θ = 13.63 + 36.163

θ = 49.793

Therefore, the angular displacement is 49.793 rad.

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In the context of the auditory system, frequency theory states that the perception of pitch is determined by the frequency of the sound wave, with higher frequencies being perceived as higher pitches and lower frequencies being perceived as lower pitches.

This theory suggests that the hair cells in the cochlea vibrate in synchrony with the frequency of the sound wave, sending signals to the brain that are interpreted as pitch.The frequency theory of hearing proposes that whatever the pitch of a sound wave, nerve impulses of a corresponding frequency will be sent to the auditory nerve. For example, a tone measuring 600 hertz will be transduced into 600 nerve impulses a second. This theory has a problem with high-pitched sounds, however, because the neurons cannot fire fast enough.

So, In the context of the auditory system, frequency theory states that the perception of pitch is determined by the frequency of the sound wave.

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The maximum power a giant electric eel can deliver to its prey is 5.00×10^2 V × 1.00 A = 5.00 × 10^2 W. the current through the swimmer in this case is not large enough to be dangerous.

If the snorkeler's body resistance is 615 Ω and the eel delivers a voltage of 5.00×10^2 V, then the current flowing through the snorkeler's body can be calculated using Ohm's Law: I = V/R. Hence, I = (5.00×10^2 V) / (615 Ω) ≈ 0.813 A.

The current of 0.813 A is less than 500 mA, the threshold for causing heart fibrillation and death. Therefore, the current through the swimmer in this case is not large enough to be dangerous.

The power received by the snorkeler can be calculated using the formula P = IV. Thus, P = (0.813 A) × (5.00×10^2 V) ≈ 4.07 × 10^2 W.

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Answer:

\(E_{KE}=937,000 J\)

Explanation:

the formula for Kinetic Energy is \(E_{KE}=\frac{1}{2}mv^2\\\)

by plugging in the mass and velocity

\(E_{KE}=\frac{1}{2}*750*50^2\)

\(E_{KE}=937,000\)

The statement "They have a positive charge and are present in the nucleus of an atom along with the neutrons" correctly describes protons.

Protons are small particles that make up the nucleus of an atom. They carry a positive charge and have a mass of approximately 1 atomic mass unit. The number of protons within an atom's nucleus defines its atomic number and thus its identity as an element.

For instance, carbon atoms have 6 protons, and oxygen atoms have 8 protons. Protons are vital building blocks of all atoms and play a significant role in the chemical behavior and reactions of elements.

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Answer:

D. 4 m/s²

Explanation:

Given;

initial velocity of the car, u = 0

distance traveled by the car, s = 18 m

time of motion of the car, t = 3.0 s

The magnitude of the car's acceleration is given by;

s = ut + ¹/₂at²

s = 0 + ¹/₂at²

s = ¹/₂at²

2s = at²

a = 2s / (t²)

a = ( 2 x 18) / (3²)

a = 4 m/s²

Therefore, the  magnitude of the car's acceleration is 4 m/s²

Answer:

a) 12614.4 m^3

b) 28.8 m

Explanation:

The complete question is

Four astronauts are in a spherical space station. (a) If, as is typical, each of them breathes about 500 cm^3 of air with each breath, approximately what volume of air (in cubic meters) do these astronauts breathe in a year? (b) What would the diameter (in meters) of the space station have to be to contain all this air?

The average breathing rate is 12 breaths per minute

there are 60 minutes x 24 hours x 365 days in a year = 525600 minutes in a year

if an average human takes 12 breath per minute, then in a year an average human take 12 x 525600 = 6307200 breath

For the four astronauts, the amount of breath = 4 x 6307200 = 25228800 breath in total.

The volume of air per breath = 500 cm^3

1 cm^3 = 10^-6 m^3

500 cm^3 = \(x\) m^3

\(x\) = 500 x 10^-6 = 5 x 10^-4 m^3

Therefore in a year, the volume of these astronauts breath in a year = 5 x 10^-4 x 25228800 = 12614.4 m^3

b) If the space station is spherical, the volume will be given as = \(\frac{4}{3} \pi r^3\)

where r is the radius of the space station

This volume of the space station must be able to contain all the volume of breath produced by the astronauts which is = 12614.4 m^3

Equating, we have

12614.4 = \(\frac{4}{3} \pi r^3\)

12614.4 = \(\frac{4}{3}*3.142*r^3\)

12614.4 = 4.1893\(r^{3}\)

\(r^{3}\) = 12614.4/4.1893 = 3011.1

r = \(\sqrt[3]{3011.1}\) = 14.4 m

diameter of the space station = 14.4 m x 2 =  28.8 m

Answer:

visible region

Explanation:

According to the procedure in section 2, in visible region the data collected on hydrogen and helium’s line spectra.

Electromagnetic spectrum are the wave which is form of energy and includes the waves such as radio waves, gamma waves, visible light waves etc.

An element’s line spectrum can include emissions at wavelengths throughout the electromagnetic spectrum including ultraviolet, visible, and infrared.

Types of electromagnetic spectrum-

The hydrogen line spectra fall between wavelength, 410 nm to 656 nm. The helium line spectra fall between wavelength, 400 nm to 781 nm.This two fall in the visible region of line spectra.

According to the procedure in section 2, in visible region the data collected on hydrogen and helium’s line spectra.

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Answer: f=20 (i think)

Explanation:

all I did was divide 300 and 15.

300/15= 20

Method A, detection of reflected light by the planet, has not yet detected planets around other stars. This is because the reflected light from a planet is much fainter than the light from the star itself.So option A is correct.

All of the other methods, B, C, and D, have been used to successfully detect planets around other stars.

As of 2023, over 5,000 exoplanets have been discovered using a variety of methods.Therefore option A is correct.

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