TRUE/FALSE. brown dwarfs have about the same radius of jupiter but have masses that are 13 to 80 times bigger than jupiters mass
Answers
TRUE brown dwarfs have about the same radius of jupiter but have masses that are 13 to 80 times bigger than jupiters mass.
Does Jupiter exceed the size of a brown dwarf?
Brown dwarfs are less massive than stars but more massive than any of the large planets in our solar system. Although this brown dwarf is about the same size as Jupiter, it spins approximately ten times more quickly and has around 43 times more mass than Jupiter.
Jupiter is the largest planet in our solar system, yet despite its size, it is still much too light to fuse hydrogen into helium. To become a brown dwarf, the planet would need to be 13 times its present mass; to become a low-mass star, it would need to be 83 to 85 times its current mass.
The brown dwarfs that have been found so far are all components of a binary system.
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Related Questions
Types of Spectra 5) Stars like our Sun have low-density, gaseous atmospheres surrounding their hot, dense cores. If you were looking at the spectra of light coming from the Sun (or any star), which of the three types of spectrum would be observed? Explain your reasoning.
Answers
The spectrum observed from the Sun (or any star) would exhibit an absorption spectrum. This is because the outer gaseous atmosphere of the star absorbs specific wavelengths of light, resulting in dark absorption lines in the spectrum.
In the cooler, lower-density outer atmosphere, where white light from the star travels, some atoms or molecules in the atmosphere absorb photons with particular energy. In the spectrum, these absorptions show up as black lines at specific wavelengths. The specific set of absorption lines that each element or molecule generates results in a distinctive pattern that can be used to identify the elements that are present in the star's atmosphere.
The absorption spectrum offers insightful data on the chemical make-up and physical characteristics of the star. Astronomers can ascertain the elements present, their abundances, and other characteristics like the temperature, pressure, and velocity of the star's atmosphere by examining the absorption lines.
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The hyperfine interaction in a hydrogen atom between the magnetic dipole moment of the proton and the spin magnetic dipole moment of the electron splits the ground level into two levels separated by 5. 9×10?6eV.
1. Calculate the wavelength of the photon emitted when the atom makes a transition between these states.
2. Calculate the frequency of the photon emitted when the atom makes a transition between these states.
3. In what part of the electromagnetic spectrum does this lie? Such photons are emitted by cold hydrogen clouds in interstellar space; by detecting these photons, astronomers can learn about the number and density of such clouds.
4. Calculate the effective magnetic field experienced by the electron in these states.
5. Compare your result to the effective magnetic field due to the spin-orbit coupling 18 T
Answers
1. The wavelength of the emitted photon is approximately 2.10 meters, corresponding to the microwave region of the electromagnetic spectrum.
2. The frequency of the photon is 1.427 ×\(10^8 s^(^-^1^)\).
3. The effective magnetic field experienced by the electron in these states is approximately 1.022 Tesla.
4. Comparing it to the effective magnetic field due to spin-orbit coupling (18 T), the effective magnetic field experienced by the electron in the hyperfine interaction is significantly smaller.
5. The hyperfine interaction is weaker than the spin-orbit coupling in terms of magnetic field strength.
1. To calculate the wavelength of the emitted photon, we can use the equation:
λ = c / ν
where λ is the wavelength, c is the speed of light in vacuum (approximately 3.00 × \(10^8\) m/s), and ν is the frequency of the photon emitted.
Using the given energy difference of 5.9 × \(10^(^-^6^)\) eV, we need to convert it to joules to match the units in the equation. The conversion factor is 1 eV = 1.602 × \(10^(^-^1^9^)\) J.
E = 5.9 × \(10^(^-^6^)\)eV * 1.602 × \(10^(^-^1^9^)\) J/eV = 9.447 ×\(10^(^-^2^6^)\)J
Now, we can calculate the frequency:
ν = E / h
where h is Planck's constant (approximately 6.626 × \(10^(^-^3^4^)\) J·s).
ν = 9.447 ×\(10^(^-^2^6)\)J / (6.626 × \(10^(^-^3^4^)\) J·s) = 1.427 × \(10^8 s^(^-^1^)\))
2. The frequency of the emitted photon is 1.427 × 10^8 s^(-1).
3. To determine the part of the electromagnetic spectrum, we can use the equation:
c = λν
Substituting the values of c and ν, we can solve for λ:
λ = c / ν = (3.00 × \(10^8\)m/s) / (1.427 ×\(10^8 s^(^-^1^))\)≈ 2.10 m
The calculated wavelength is approximately 2.10 meters, which corresponds to the microwave region of the electromagnetic spectrum.
4. The effective magnetic field experienced by the electron in these states can be calculated using the formula:
ΔE = μBΔB
where ΔE is the energy difference between the two levels (5.9 ×\(10^(^-^6^)\)eV), μB is the Bohr magneton (approximately 9.274 ×\(10^(^-^2^4^)\) J/T), and ΔB is the effective magnetic field experienced by the electron.
Solving for ΔB:
ΔB = ΔE / μB = (5.9 × \(10^(^-^6^)\) eV * 1.602 ×\(10^(^-^1^9^)\) J/eV) / (9.274 ×\(10^(^-^2^4^)\)J/T) ≈ 1.022 T
The effective magnetic field experienced by the electron in these states is approximately 1.022 Tesla.
5. Comparing the result to the given effective magnetic field due to spin-orbit coupling (18 T), we can see that the effective magnetic field experienced by the electron in the hyperfine interaction is significantly smaller (1.022 T). This indicates that the hyperfine interaction is weaker compared to the spin-orbit coupling in terms of magnetic field strength.
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Solar radiation bounces off of a polar ice cap, then goes into the atmosphere where it remains trapped. Which
statement best describes this situation?
The radiation is absorbed by the ice and then reflected by the atmosphere.
O The radiation is reflected by the ice and then absorbed by the atmosphere.
O The radiation is absorbed by the ice and atmosphere.
O The radiation is reflected by the ice and atmosphere.
Answers
Answer:
b
Explanation:
The radiation is reflected by the ice and then absorbed by the atmosphere.
Answer:
B
Explanation:
I got it right on my assignment
How are plant cells different from animal cells?
Only plant cells can grow.
Only animal cells can reproduce.
Only animal cells can store energy.
Only plant cells can perform photosynthesis.
Answers
Plant cells are different from animal cells in the sense that only plant cells can perform photosynthesis (option D).
What is photosynthesis?Photosynthesis is a biological process by which green plants manufacture their own food (sugar) using energy from sunlight.
In other terms, it can be said that photosynthesis is any process by which plants and other photoautotrophs convert light energy into chemical energy.
Animal cells are rather heterotrophic, meaning that they cannot synthesize their own food like plants do.
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Predict how monarch butterfly populations may compare over time in two locations with very different temperatures.
Answers
Answer:
they will increase why because they go from warm cold warm meaning they have to adapt back to the previous location
Explanation:
List 3 main types weathering
Answers
Answer:
3 types of weathering are, physical, chemical and biological weathering.
Explanation:
Hope this helps and have a wonderful day!!!
At what time did time begin
50 points :)
Answers
Answer:
According to the standard big bang model of cosmology, time began together with the universe in a singularity approximately 14 billion years ago.
Explanation: the big bang
Answer:
approximately 14 billion years ago
in pre-lecture quiz, problem 10.20, you found that the direction of the frictional force exerted on a coffee cup sitting on a table while the table is dragged to the right and moves on a smooth horizontal surface without friction is to the right. if the coffee cup does not move relative to the table, does the static friction force on the coffee cut do positive, negative, or zero work on the coffee cup? a. positive b. negative c. zero
Answers
The static friction force on the coffee cup does zero work on the coffee cup.
The static friction force acts to the right, and the coffee cup is stationary relative to the table. Since the coffee cup is not moving, there is no displacement. Work is calculated as W = F * d * cos(theta), where F is the force, d is the displacement, and theta is the angle between the force and displacement vectors. Since the displacement is zero, the work done by the static friction force on the coffee cup is also zero.
The work done by the static friction force on the coffee cup is zero (Option C).
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Match Column A with Column B. Write the letter of your answer on the space provided.
Column A
1. boiling point
2. oven toasters
3. "C
4. "moving"
5. grease
6. thermometer
7. Energy at rest
8. Radiant energy
9. calories
10. coal
Column b
a. lubricants
b. Celsius
c. temperature
d. potential energy
e. 100 °C
f. electricity
g. kinetic fricion
h. heat
i. spontaneous combustion
j. light energy
k. energy
I meant to put chemistry not physics lol
Answers
Answer:
1. e
2. f
3. b
4. g
5. a
6. c
7. d
8. j
9. k
10. i
The points of Column A with Column B related to unit measurement, temperature and energy are matched with their appropriate option.
\(1-2-3-4-5-6-7-8-9-10\\ e-f-b-g-a-c-d-j-k-l\)
What is energy?Energy is the capacity of a object to do a work. More the energy object posses, more the work it can do.
The main categories of energy
1. Kinetic—The energy of moving objects.2. Potential—The energy stored in objects.Let's match the point of Column A with Column B.
1. Boiling point of water is at 100 degree Celsius.2. Oven toasters is the electric device which runs on the electricity.3. "C" is symbol which represent the Celsius to show the temperature of a body on the Celsius scale.4. Kinetic friction is the force which is enforce between the moving surface. 5. Grease is used as the lubricants. This is a semi-solid lubricants used in moving or rotating system to avoid friction.6. Thermometer is device which is used to measure the temperature of the body.7. Energy at rest is called the potential energy. Potential energy is the stored energy of the body which it posses due its position.8. Radiant energy is the type of electromagnetic energy which is the form of light energy.9. Calories is the unit of measurement which is used to measure the energy of a body. 10. The burning of coal provides spontaneous combustion.Thus, the points of Column A with Column B related to unit measurement, temperature and energy are matched with their appropriate option.
\(1-2-3-4-5-6-7-8-9-10\\ e-f-b-g-a-c-d-j-k-l\)
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How do you find Net Force with Two Forces?
Answers
To find the net force with two forces, you need to add the two forces together if they are in the same direction, or subtract them if they are in opposite directions.
How to find the Net Force?Identify the two forces that are acting on an object. For example, let's say you have a force of 5 N to the right and a force of 3 N to the left.Determine the direction of each force. In our example, one force is to the right and the other is to the left.If the forces are in the same direction, add them together to find the net force. If they are in opposite directions, subtract the smaller force from the larger force to find the net force. In our example, the forces are in opposite directions, so we subtract 3 N from 5 N to get a net force of 2 N to the right.Write your answer, including the direction of the net force. In our example, the net force is 2 N to the right.So, the net force with two forces is found by adding the forces together if they are in the same direction, or subtracting them if they are in opposite directions.
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A box of mass m is pulled with a constant acceleration a along a horizontal frictionless floor by a wire that makes an angle of 15° above the horizontal. If t is the tension in this wire, then:.
Answers
The tension in the wire is given by T = mg/(cosθ + μsinθ) where μ is the coefficient of kinetic friction.
When a box of mass m is pulled with a constant acceleration a along a horizontal frictionless floor by a wire that makes an angle of 15° above the horizontal, the tension in this wire is given by:
T = mg/(cosθ + μsinθ) where μ is the coefficient of kinetic friction.
Therefore, we have to assume that the box is moving at a constant speed (meaning there is no net force acting on it). We will now find the value of tension in the wire.In the given scenario, there are two forces acting on the box.
One is the force due to tension in the wire, and the other is the force of gravity acting vertically downwards.
We can resolve these two forces into horizontal and vertical components.
The vertical component is balanced by the normal force, and the horizontal component is the net force acting on the box.
We can then apply Newton's second law, F=ma, to find the acceleration of the box.
The tension in the wire is then found using the formula given above.
The tension in the wire is given by T = mg/(cosθ + μsinθ) where μ is the coefficient of kinetic friction.
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the solution to the assessment problem is found by representing each of the coupled inductors as __________.
Answers
The solution to the assessment problem can be found by representing each of the coupled inductors as a set of ideal transformers.
This allows us to apply the concepts of mutual inductance and coupling coefficient to determine the overall behavior of the circuit. By breaking down the coupled inductors into their individual components, we can then apply standard circuit analysis techniques to solve for the voltage, current, and power in the system. It is important to note that the accuracy of this approach may be limited by the assumptions made about the behavior of the transformers and the accuracy of the models used to represent them.
In many practical applications, this method can provide a useful approximation for understanding and designing complex systems.
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four resistance of resistance 1 resistance, 2 resistance,3 resistance are connected in series and afterwards in parallel. Calculate the combined resistance in each case.
Answers
In series: The combined resistance is equal to the sum of the individual resistances (R_total = R1 + R2 + R3).
In parallel: The combined resistance is the reciprocal of the sum of the reciprocals of the individual resistances (1/R_total = 1/R1 + 1/R2 + 1/R3).
When resistors are connected in series, their resistances add up to give the total resistance. In this case, the combined resistance in series would be the sum of the individual resistances: R_total = R1 + R2 + R3.
On the other hand, when resistors are connected in parallel, their reciprocals sum up to give the inverse of the total resistance. In this case, the formula for calculating the combined resistance in parallel is: 1/R_total = 1/R1 + 1/R2 + 1/R3.
Let's assume the resistance values are R1 = 1 ohm, R2 = 2 ohms, and R3 = 3 ohms.
For the series connection: R_total = R1 + R2 + R3 = 1 + 2 + 3 = 6 ohms.
For the parallel connection: 1/R_total = 1/R1 + 1/R2 + 1/R3 = 1/1 + 1/2 + 1/3 = (6 + 3 + 2) / 6 = 11 / 6. Taking the reciprocal of both sides, we get R_total = 6 / 11 ohms.
Therefore, the combined resistance in the series connection is 6 ohms, while in the parallel connection, it is 6/11 ohms.
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the Ability of water to pass through layers of soil and rock is....
1. impermeable
2. permeability
3. gradient
4. porosity
Answers
describe the trends of the elements including boiling/melting points and conductivity in relation to the periodic table
Answers
Explanation:
modern quantum mechanics explains these periodic trends in properties in terms of electron shells. the filling of each shell corresponds to a row in the table
Which of these are the reasons why scientists want to develop soft robots?
(1)to handle fragile or easily-damaged materials
(2)to aid in surgery and search and rescue efforts
(3)to make rigid electronic circuits less expensive
(4)to eliminate fluid-based transistors and diodes
Answers
The primary reason why scientists want to develop soft robots is option A: to handle fragile or easily-damaged materials. Option A
Soft robots have the potential to revolutionize various industries. In fields such as manufacturing, healthcare, and agriculture, there is a need to handle delicate objects or perform tasks in environments where rigid robots may cause damage or be ineffective.
Option B also aligns with the reasons for developing soft robots. They can aid in surgery and search and rescue efforts. Soft robots' compliant nature allows them to navigate through tight spaces, maneuver around obstacles, and interact safely with human tissues.
In minimally invasive surgeries, soft robots can perform precise and controlled movements, reducing the risk of trauma to patients. In search and rescue scenarios, soft robots can access complex environments and provide assistance in locating and rescuing individuals in confined or hazardous areas.
Options C and D, however, do not pertain to the primary reasons for developing soft robots. While advancements in flexible electronics may be a byproduct of soft robotics research, it is not the central motivation. Similarly, eliminating fluid-based transistors and diodes is not a direct goal of soft robotics. Option A.
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b) A stone is projected horizontally with velocity 10 m/s from height 100 m in a vacuum and moves along a path as shown. X is the point on this path after 2 seconds. Calculate the magnitude and direction of velocity at this point.
Answers
At the point X after 2 seconds, the stone has a magnitude of velocity equal to 10 m/s, and its direction is purely horizontal.
When a stone is projected horizontally in a vacuum, it only experiences horizontal motion due to the absence of air resistance. The vertical motion is governed by the force of gravity alone. In this scenario, the stone will undergo uniform horizontal motion with a constant horizontal velocity.
Given that the stone is projected horizontally with a velocity of 10 m/s, its horizontal velocity remains constant throughout the motion. After 2 seconds, the stone will have traveled a horizontal distance equal to the product of its horizontal velocity and the time, which is 10 m/s * 2 s = 20 m. Therefore, the stone will be located 20 meters horizontally from the point of projection. Since the stone is moving horizontally, its vertical velocity remains zero throughout the motion. The magnitude of the velocity at this point is equal to the horizontal velocity, which is 10 m/s. However, since the stone is moving horizontally, there is no vertical component of velocity.
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The location of a planet relative to the Sun has a lot to do with its _____; whether it is one of the inner terrestrial planets or outer gas giants.
Answers
Answer:
Composition.
Explanation:
the inner planets tend to be made up of more solid materials such as iron, while outer planets are made up of primarily gas and ice
As important as it is to plan ahead,sometimes you
Answers
Answer:
B. Cant stop things from going wrong.
Explanation:
To me it's the only reasonable answer...
classroom and draw an approxim object Three forces are acting on an object (Figure 1.32) which is in equilibrium. Determine force A 1200 N Force A 51 39 42.00 1400 N Figure 1.32 Three forces, acting on
Answers
Newer aircraft jet catapult systems use magnets instead of steam. The launch still takes 1.19 seconds, but the acceleration is a about 47.41 m/s2. Determine the length of the runway on the carrier, assume the aircraft starts from REST
Answers
Answer:
33.6 m
Explanation:
Given:
v₀ = 0 m/s
a = 47.41 m/s²
t = 1.19 s
Find: Δx
Δx = v₀ t + ½ at²
Δx = (0 m/s) (1.19 s) + ½ (47.41 m/s²) (1.19 s)²
Δx = 33.6 m
If a fish looks upward at 45 degrees with respect to the water's surface, it will see:
a. the sky and possibly some hills. b. another fish in the pond. c. the bottom of the pond. d. only the waters surface
Answers
If a fish looks upward at 45 degrees with respect to the water's surface, it will see option a, the sky and possibly some hills.
When a fish looks upward at a 45-degree angle with respect to the water's surface, it will see the sky and possibly some hills. This is because light rays refract when they pass from one medium to another with different optical densities.
As light travels from air to water, it slows down, and its path bends towards the normal, which is perpendicular to the water's surface. This bending of light is called refraction. When the fish looks upwards, it sees the light that has been refracted by the water, and this light carries information about the sky and the surrounding landscape.
However, the amount of refraction depends on the angle of incidence of the light ray, so the fish will not see the entire sky but only a portion of it. At a 45-degree angle, the fish will see a wider view of the sky and possibly some hills, depending on the surrounding topography. Therefore, the fish will not see the bottom of the pond, which is below its line of sight.
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what is one way that astronomers have been able to make good estimates for the age of the surfaces of terrestrial planets other than the earth?
Answers
Counting the amount of impact craters on a surface can help determine how old it is. Because of the frequency of solar system impacts, this method is effective.
What is one method by which astronomers have really estimated the age?Finding rocks that contain radioactive elements on Earth allows us to determine the age of different regions of our planet.
How can the age of a planet's surface, as indicated by satellite images, be estimated?A surface's age can be determined by the total number of craters it has recorded. It is feasible to determine the absolute age of the surface by estimating the pace at which craters occur.
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please help! you are awesome! also brainliest :)
The diagram below shows the two forces that keep Earth in orbit around the Sun.
What is responsible for Earth's movement toward the Sun?
A. Sun's forward motion
B. Earth's forward motion
C. Expansion of the universe.
D. force of gravity
Answers
Answer:
It's d
Explanation:
Answer: D
Explanation:
Force of gravity
the tiny ripples in the background radiation cobe found are due to
Answers
The tiny ripples in the background radiation COBE found are due to the quantum fluctuations that occurred during cosmic inflation.
What is COBE?
The Cosmic Background Explorer (COBE) is a satellite that was launched in 1989 to study the cosmic microwave background radiation. It was the first satellite mission dedicated solely to cosmology, and it provided groundbreaking insights into the early universe.
What is the cosmic microwave background radiation?
The cosmic microwave background radiation is a faint glow of electromagnetic radiation that permeates the entire universe. It is thought to be the remnant of the Big Bang, and it has been detected in every direction of the sky.
What are quantum fluctuations?
Quantum fluctuations are tiny variations in the energy density of the early universe. They are a natural consequence of the uncertainty principle in quantum mechanics, and they played a crucial role in the formation of the large-scale structure of the universe.
What is cosmic inflation?
Cosmic inflation is a period of exponential expansion that occurred in the early universe. It is thought to have happened within the first 10^-32 seconds after the Big Bang, and it is responsible for the large-scale homogeneity and isotropy of the universe. Cosmic inflation was proposed in the early 1980s to solve some of the problems with the Big Bang model.
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reselasie3. An object of mass 900 kg is hanging from a ceilingby means of two strings. The first string (7₁) makes anangle of 40 degree with the horizontal-right. The second string(T₂) makes an angle of 20 degree with the horizontal-left.Calculate the tension in the first string (7₁) (2 point)A. O12034.001 NB. O14675.062 NC. 5790.32 ND. 09570.261 NE. 13316.872 N
Answers
First, find the weight of the object.
W = m g = 900 x 9.8 = 8,820 N
T2x = -t2 cos 20
t1 x = t1cos 40
mgx= 0
T2y= t2 sin 20
t1y= t1 sin 40
mgy= - mg
X and y components of resultant (R)
Rx = t1x -t2x + mgx
Rx= -t2 cos 20 + t1cos 40 (3)
Ry = t2 sin 20 + t1 sin 40 - mg(2)
Rx, and Ry = 0
0 = -t2 cos 20 + t1cos 40 (3)
0= t2 sin 20 + t1 sin 40 - mg (4)
Solve (3)
0 = -t2 cos 20 + t1cos 40
t2 cos 20 = t1 cos 40
t2 = t1 cos40/cos20
t2 = 0.815 t1
Substitute t2 in 4
0 = t2 sin 20 + t1 sin 40 - mg
0 = (0.815 t1) sin 20 + t1 sin 40 - 8,820
0= t1 ( 0.815 sin 20 + sin 40 ) -8820
0 = 0.921 t1 -8820
8820 = .921 t1
t1 = 8820/0.921
t1= 9570.261N (option D)
How does heat capacity relate to ocean currents
Answers
Answer:
Water has an especially high heat capacity at 4.18 J/g*C, which means it takes more heat to warm a gram of water. ... Air that is in contact with the ocean will be much cooler from energy transfer between water and air, while air that sits above land will heat up much more quickly
MRU(movimiento rectilineo uniforme) un movil viaja en linea recta con una velocidad media de 12metros /segundos durante 9segundos y luego con una velocidad media de 4.8metros/segundos durante 7 segundos siendo ambas velocidades al mismo sentido. a) cual es el desplazamiento total del viaje de 16 segundos? b) cual es la velocidad media del viaje completo?
Answers
Answer:
a) 141.6m
b) 8.4m/s
Explanation:
a) to find the total displacement you use the following formula for each trajectory. Next you sum the results:
\(x_1=v_1t_1=(12m/s)(9s)=108m\\\\x_2=v_2t_2=(4.8m/s)(7s)=33.6m\\\\x_T=x_1+x_2=108m+33.6m=141.6m\)
hence, the total distance is 141.6m
b) the mean velocity of the total trajectory is given by:
\(v_m=\frac{v_1+v_2}{2}=\frac{12m/s+4.8m/s}{2}=8.4\frac{m}{s}\)
hence, the mean velocity is 8.4 m/s
Velocity may be positive,negative or zero.Explain this statement with diagram.
Answers
Answer:
/
Explanation:
In the data table, distance is measured in meters and time is in seconds. Calculate the boy’s average velocity using the equation
average velocity= total distance / total time
Answers
Answer:
23.59 for the average pls give brainliest sis
Answer: 23.59
HOPE THIS HELPS :D