A star’s temperature is 10.00 times as high as the Sun’s, and its luminosity is 79.00 times that of the Sun. What is the ratio of the star’s radius to the Sun’s radius
Answers
The ratio of the star's radius to the Sun's radius is 8.89.
The ratio of the star’s radius to the Sun’s radius can be calculated as follows:
The luminosity of a star is directly proportional to the fourth power of its radius.
This relationship is referred to as the Stefan-Boltzmann law.
The formula is as follows:
L1/L2 = (R1/R2)^2
The luminosity of the star is 79 times greater than that of the sun.
L1/L2 = 79/1
Therefore,
(R1/R2)^2 = 79/1.
R1/R2 = √79.
R1/R2 = 8.89.
The star's radius is 8.89 times greater than the Sun's radius.
Therefore, the ratio of the star's radius to the Sun's radius is 8.89.
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Related Questions
No matter where the light bulb is located on the central axis, what is always true about the size of the image?
Answers
Answer:
there is no image
Explanation:
Which type(s) of subatomic particles can be located within the nucleus of an atom?
a) electrons only
b) neutrons only
c) protons and neutrons
d) protons and electrons
Answers
According to the research, the correct option is c. Protons and neutrons are subatomic particles can be located within the nucleus of an atom.
What is an atom?It is the minimum unit of a substance, which makes up all common matter and is made up of a nucleus with protons and neutrons and several orbital electrons, the number of which varies according to the chemical element.
In this sense, protons are subatomic particles that have a positive energetic charge, while neutrons have no charge.
Therefore, we can conclude that according to the research, the correct option is c. Protons and neutrons are subatomic particles can be located within the nucleus of an atom.
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Why do plane mirrors and convex mirrors form only virtual images?
a. because they both cause light rays to
spread out
b. because reflected rays appear to come
from behind the mirror
c. because the focal point is in front of the mirror
d. because they both show a wide angle of view
Answers
The plane mirrors and convex mirrors form only virtual images because reflected rays appear to come from behind the mirror.
In plane mirrors, the surface is totally flat, making light rays to reflect off the surface at the same angle at which they hit it. The reflected rays appear to come from behind the mirror, making a virtual image.
The image created by a plane mirror is of the same size as the object and appears to be situated behind the mirror.
Likewise, convex mirrors have a curved outward surface. When light rays hit a convex mirror, they diverge after reflection. This divergence makes the reflected rays to appear to come from behind the mirror as well, that results in the formation of a virtual image.
Convex mirrors have a vast field of view due to the divergence of the reflected rays, that allows them them to show a wider angle of view compared to flat or concave mirrors.
Hence, the right answer is option b: because reflected rays appear to come from behind the mirror.
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Heat can be transferred in several ways. Which of the following is an example of conduction? (DOK 2) A The sun is shining on a metal chair. B A fire in the fireplace is heating a room C Someone touching a hot metal pan DA hair dryer blowing your hair
Answers
Answer:
Explanation:
G yvyvybybybububunununu
I’ll name u BRAINLIEST if u get this right
Answers
v = 0.01 * 500 - 2 * 1.4 / 0.01
v = 220 m/s
what is translational equilibrium? What does this mean in terms of movement of an object?
Answers
The object will continue to move in a straight line at a constant velocity unless acted upon by an external force.
Translational equilibrium refers to a state where an object is not experiencing any net force that is causing it to move in a particular direction. This means that the object is either at rest or moving with a constant velocity. In terms of movement, it means that the object's motion is stable and not changing in direction or speed. In terms of movement, this means that the object will either remain at rest or continue moving at a constant velocity, as there is no unbalanced force to cause any change in its motion.
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A 15-volt power supply is used to power a circuit with two resistors in series. The voltage drop across R1 is 5 volts. What is the voltage drop across R2?
5 volts
20 volts
10 volts
0 volts
A 10-volt power supply is used to power a circuit, producing a current of 2 A. If total resistance of circuit is doubled, how will this affect the circuit?
A. Voltage drop across each resistor will all double to match change in resistance
B. The current will change so that the voltage drop for a complete loop through the circuit becomes 5 V.
C. The current will change so that the voltage drop for a complete loop through the current remains at 10 V.
D. The voltage drop across each resistor will be unaffected because each will remain at 0 V
Answers
(1) The voltage drop in the second resistor is 10 V.
(2) The voltage drop across each resistor will all double to match change in resistance.
The given parameters:
voltage in the circuit, V = 15 Vvoltage drop in first resistor, V1 = 5 VThe total voltage in a series circuit is given as;
\(V_T = IR_1 + IR_2\\\\V_T = V_1 + V_2\)
The voltage drop in the second resistor is calculated as follows;
\(V_2 = V_T - V_1\\\\V_2 = 15 - 5\\\\V_2 = 10 \ V\)
(2)
voltage supply, V = 10 Vcurrent, I = 2 AThe resistance of the circuit:
\(R = \frac{V}{I} = \frac{10}{2} = 5 \ ohms\)
When the total resistance is doubled;
In series circuit, the current in each resistor is constant, the voltage drop is calculated as;
\(V = IR\\\\V = 2 (5+5)\\\\V = 20 \ V\)
Thus, we can conclude that the voltage drop across each resistor will all double to match change in resistance.
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If two resistors each of 40 ohms are connected in series what will be its equivalent resistance. If the same resistors are connected in parallel combination what will be the equivalent resistance? ANSWER CORRECTLY, IWILL MARK IT BRAINLIEST.
Answers
Explanation:
In case the resistors are in series
R =R1 + R2
R = 40 ohm + 40 ohm
R = 80 ohm
In case the resistors are in parallel
R = 1/R1 + 1/R2
R = 1/40 + 1/40
R = 2/40 ohm
R = 1/20 ohm or R = 0.05 ohm
dont forget to mark brainliest
Answer:
dtwtwerEtbWt
Explanation:
bwtrbtWbTW4TBW4tbW4T4t
Most metals are
dull
brittle
ductile
Answers
Which describes energy and work? *A. Only work is measured in joules."B. Energy remains constant when work is done.C. Work is a measure of how much energy a force transfers.D. When work is done on an object, no energy is transferred
Answers
Correct option is:- C) Work is a measure of how much energy a force transfers.
Which would require the greater energy; slowing down of the orbital speed of the Earth so it crashes into the sun, or speeding up the orbital speed of the Earth so it escapes the sun
Answers
Answer: Speeding up the orbital speed of earth so it escapes the sun require the greater energy.
Explanation: To find the answer, we need to know more about the Orbital and escape velocities.
What is Orbital and Escape velocity?Orbital velocity can be defined as the minimum velocity required to put the satellite in its orbit around the earth.The expression for orbital velocity near to the surface of earth will be,\(V_o=\sqrt{gR}\)
Escape velocity can be defined as the minimum velocity with which a body must be projected from the surface of earth, so that it escapes from the gravitational field of earth.The expression for orbital velocity will be,\(V_e=\sqrt{2gR}\)
If we want to get into the sun, we want to slow down almost completely, so that your speed relative to the sun became almost zero.We need about twice the raw speed to go to the sun than to leave the sun.Thus, we can conclude that, the speeding up the orbital speed of earth so it escapes the sun require the greater energy.
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Why will a delivery truck filled with birds sitting on its floor be heavier than a truck with the same birds flying around inside.
Answers
The reason why a delivery truck filled with birds sitting on the floor be heavier than a truck with the same birds flying around is because when the birds are sitting on the floor, they are adding their weight to the truck.
Meanwhile, if the birds are flying around they aren't resting on the truck or touching it, so therefore their weight wouldn't be added to the truck.
The mass of the truck will remain the same as you cannot change the mass but the weight will vary depending on the items and objects placed in it.
How is Venus similar to Earth?
Both have the same day length.
Both rotate in the same direction.
Both have ample water on their surfaces.
Both have a solid inner core and a liquid outer core.
Answers
Answer: D
Explanation: I have my answers VS. Go0gle answers (go0gle answers are pics)
(A) Both have the same day length. Well, Venus doesn't havve the same amount of days. (I already know off the top of my head, but I still searched it up)
(B) Both rotate in the same direction. In school (before Virus) they would always show diagrams of the planets on the projector and Venus doesn't rotate
(C) Both have ample water. No. Venus doesn't have much water >_>
(D) Both have a solid inner core and a liquid outer core. Yesh. In my lessons (before), Venus has a solid inner core and liquid outer core.
60 kg acceleration due to gravity in the moon
Answers
Therefore, a 60kg object would weigh approximately 96 Newtons on the moon.
Weight calculation .The acceleration due gravity on the moon is a measure of how much objects accelerate toward the moon's surface under the influence of its gravitational force. It is denoted by the symbol g and gas a value of approximately 1.6m/s²
To calculate the weight of a 60kg object on the moon, you can use the formula:
Weight = mass × acceleration due to gravity
Weight = 60kg × 1.6m/s²
Weight on the moon = 96N
Therefore, a 60kg object would weigh approximately 96 Newtons on the moon.
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what is the correct answer?
Answers
The effective resistance of the Parallel circuit is 3 ohms.
option B.
What is the effective resistance of the circuit?
In a parallel circuit, the sum of the currents through each path is equal to the total current that flows from the source.
The total resistance or effective resistance in a Parallel circuit with the following formula:
1/Rt = 1/R1 + 1/R2
where;
Rt is the effective resistanceR1 is the resistance of the first resistorR2 is the resistance of the second resistor1/Rt = 1/4 + 1/12
1/Rt = (3 + 1 ) / 12
Rt = ( 12 ) / ( 4 )
Rt = 3 ohms
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Light has both a wave and a particle nature. Particles have a wave nature as well, and therefore.
Answers
Light has both a wave and a particle nature. Particles have a wave nature as well, and therefore their position can not be specified with absolute precision
This is a consequence of the Heisenberg uncertainty principle enunciated in 1927, after the works of the French physicist Louis De Broglie who proposed the existence of matter waves, that is to say, that all matter has a wave associated with it.
The uncertainty principle postulates that the fact that each particle has a wave associated with it, imposes restrictions on the ability to determine its position and speed at the same time.
It is impossible to measure simultaneously (according to quantum physics), and with absolute precision, the value of the position and the momentum (linear momentum) of a particle.
So, the greater certainty is sought in determining the position of a particle, the less is known about its linear momentum and, therefore, its mass and velocity.
It should be noted that this uncertainty does not derive from the measurement instruments, but from the measurement itself. Because, even with the most precise devices, the uncertainty in the measurement continues to exist.
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Please help me with this question
Answers
Answer:
A
Explanation:
Hi there!
If Ram dropped Ribbon P first, then it would be on the very bottom of the stack of ribbons since it was the first to reach the ground.
Next, Ram drops Ribbon Q. This means Ribbon Q would lay on top of Ribbon P.
Finally, Ram drops Ribbon R. This makes Ribbon R sit on top of both Ribbon P and Ribbon Q.
I hope this helps!
Which structural damage could be expected if a Category 3 hurricane is predicted to hit an area?(1 point)
Well-built framed homes could sustain severe damage, with loss of most of the roof structure and some exterior walls.
Well-constructed frame homes could have damage to the roof, shingles, vinyl siding, and gutters.
A high percentage of framed homes could be destroyed, with total roof failure and wall collapse.
Well-built framed homes could incur major damage or removal of roof decking and gable ends.
Answers
The structural damage which could be expected if a Category 3 hurricane which is predicted to hit an area is high percentage of framed homes could be destroyed, with total roof failure and wall collapse and is denoted as option C.
What is Hurricane?This refers to the rapidly rotating storm which has a low-pressure center and is characterized by strong winds ad thunderstorms and of different types such as category 1 to 3.
Category 3 hurricane leads to loss of lives and properties which is depicted as framed homes being destroyed with total roof failure and wall collapse which is why option C was chosen.
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Which type of communications equipment functions as a radio receiver and searches across several frequencies?
Answers
A scanner is a type of communications equipment that functions as a radio receiver and searches across several frequencies.
A scanner is a kind of a radio receiver that has the ability to receive multiple signals.
There are three modes which a scanner uses for acting as a radio receiver. The scan mode of the radio receiver constantly changes frequencies that helps in transmissions. There is also a manual scan mode that allows the users to search for their interested frequencies. The search mode allows the users to search through two sets of frequencies.
A scanner is a type of communication equipment that is easy to use with various features such as the volume, numeric keypad, trunk tracking etc.
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Shortlest wavelength?
Answers
An object starts at 16 m/s with an acceleration of 4.5 m/s? How far does it go in 9.0 seconds?
Answers
During an all-night cram session, a student heats up a 0.858 liter (0.858 x10 −3
m 3
) glass (Pyrex) beaker of cold coffee. Initially, the temperature is 18.2 ∘
C, and the beaker is filled to the brim. A short time later when the student returns, the temperature has risen to 90.6 ∘
C. The coefficient of volume expansion of coffee is the same as that of water. How much coffee (in cubic meters) has spilled out of the beaker?
Answers
approximately 2.093 x 10^(-6) cubic meters (or 2.093 milliliters) of coffee has spilled out of the beaker.To calculate the volume of coffee that has spilled out of the beaker, we can use the concept of thermal expansion. The change in volume is given by the formula ΔV = βVΔT, where β is the coefficient of volume expansion, V is the initial volume, and ΔT is the change in temperature.
First, let's convert the initial volume to cubic meters: V = 0.858 x 10^(-3) m^3.
Next, we calculate the change in temperature: ΔT = 90.6 - 18.2 = 72.4 °C.
The coefficient of volume expansion for water (and coffee) is approximately β = 3.4 x 10^(-4) °C^(-1).
Plugging in these values into the formula, we get:
ΔV = (3.4 x 10^(-4) °C^(-1)) * (0.858 x 10^(-3) m^3) * (72.4 °C) = 2.093 x 10^(-6) m^3.
Therefore, approximately 2.093 x 10^(-6) cubic meters (or 2.093 milliliters) of coffee has spilled out of the beaker.
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Help help help please help
Answers
hii
Explanation:
question: 1 Answer: the second answer
question: what is one importance of sea ice ? answer: "reflecting sunlight back into space, regulating ocean and air temperature, circulating ocean water, and maintaining animal habitats." so either 1 or 3
question: 2 Answer: Species become endangered for two main reasons: loss of habitat and loss of genetic.
2. (i’m not sure abt this one, go off the other persons answer if i had to geuss tho it would be 2?)
3. animals could go extinct bc their habitat is meant to be cold, they are meant for the cold weather but global warming is making the cold spots warm and warm spots even warmer and because the cold spots are becoming gold the animas made for cold might not make it through the warmer weather.
hope this helps:)
Convertir 1200 ms a cs
Convertir 0,3 mm a cm.
Answers
Answer:
You can do the reverse unit conversion from cm/s to m/s, or enter any two units below: Metre per second (U.S. spelling: meter per second) is an SI derived unit of both speed (scalar) and velocity (vector quantity which specifies both magnitude and a specific direction), defined by distance in metres divided by time in seconds.
Explanation:
Question 1
10 pts
A hypotheses should only contain the independent variable.
True
False
Answers
Answer:
false
A hypothesis states a presumed relationship between two variables in a way that can be tested with empirical data. ... The cause is called the independent variable; and the effect is called the dependent variable.
True or false? Balanced forces cause a change in motion. T/F
How do you know this?
Help me, it's due soon!
Answers
Balanced forces do not change the motion of an object, Because the forces are the same size and acting in opposite directions.
Answer:
Balanced forces do not change the motion of an object. The motion of an object will not change if the forces pushing or pulling the object are balanced. An object that is sitting still will stay still if the forces acting on it are balanced.
A glass stopper has a volume of 16 cm3 and a mass of 40g. calculate the density of glass in g/cm3 and in kg/m3.
Answers
A glass stopper has a volume = 16 cm^3
mass = 40 g
Therefore, density (g/cm^3) = MASS/ VOLUME
DENSITY = 40/16 g/cm^3
Density = 2.5 g/cm^3
In kg/m^3 => 2.5*10^-3 kg / 10^-6m^3 = 2500 kg/m^3
The definition of Density is the amount of matter in a given space, or volumeTo finding density D=m/v or Density = mass/volumeCommon units for density g/cm^3 or g/mL or kg/m^3 or kg/LDensity of water = 1 g/mLdensity is a physical propertyhelium is less dense than air while carbon dioxide is more dense than airSalt water is denser so we don't sink as easily.To know more about DENSITY visit : https://brainly.com/question/15164682
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what is the 2nd minimum thickness of film required? assume that the wavelength of the light in air is 470 nanometers.
Answers
The second-order minimum thickness of the film required is 1.41 μm.
The minimum thickness required for a thin film to reflect a given color is half the wavelength of the light in the film material. For a second-order minimum thickness, the formula is given by;
t2=2nλwhere t2 represents the second-order minimum thickness of the film, n is the refractive index of the film material, and λ is the wavelength of the light in air.
If the wavelength of the light in air is 470 nm, then the second-order minimum thickness of the film required is given by;t2=2nλ= 2 × 1.5 × 470 nm = 1410 nm = 1.41 μm.
The second-order minimum thickness of the film required is 1.41 μm.
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Lightning strikes the ground. The cloud and bolt had a negative charge. What charge did the ground have?
Explain.
Answers
The ground typically has a positive charge when a lightning strike occurs. This is because lightning results from the discharge of excess electrical energy between two charged regions, with one being negatively charged (the cloud) and the other positively charged.
What causes lightning strikes to occur?Lightning strikes occur due to the discharge of excess electrical energy between two charged regions, typically between a negatively charged cloud and a positively charged ground.
How does lightning affect the environment?Lightning can cause wildfires, power outages, and damage to infrastructure. It can also release nitrogen oxides into the atmosphere, which contribute to air pollution and can have negative effects on human health and the environment.
However, lightning can also provide beneficial effects by helping to replenish the ozone layer and providing nitrogen to plants.
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This equation shows how the number of biscuits Olivia can bake is related to the amount of flour she has.
c = 15f
The variable f represents the number of scoops of flour Olivia has, and the variable c represents the number of biscuits she can bake. With 1 scoop of flour, how many biscuits can Olivia bake?
Answers
With 1 scoop of flour, Olivia can bake 15 biscuits if the the equation that shows the relation between number of biscuits and amount of flour is c = 15f.
c = 15 f
c = Number of biscuits
f = Number of scoops of flour
f = 1
c = 15 * 1
c = 15
This equation shows that number of biscuits that can be made is 15 times the number of scoops of flour. So if the number of scoops of flour is 1, the number of biscuits that can be made is 15.
Therefore, with 1 scoop of flour, Olivia can bake 15 biscuits
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