the three bins represent three important properties of stars. What are the items that we must measure in orrder to determine each property into the three bins.
Luminosity ________
Surface Temperature________ Mass________
Answers
To determine each property in the three bins, certain items must be measured. The luminosity, surface temperature, and mass are the three important properties of the stars represented by three bins.
The measurement for each property is as follows:
For luminosity: To measure luminosity, we must measure the total amount of energy a star emits in all wavelengths.
For surface temperature: Surface temperature is determined by analyzing the spectrum of light emitted by the star.
The spectrum shows a rainbow of colors, and some colors will be more intense than others. These colors can be used to estimate the temperature of the star's surface.
For mass: Mass is calculated using observations of how the star interacts with its surroundings. Astronomers observe the gravitational effect that a star has on other objects around it. The mass of a star can be estimated using this method.
Stars are gigantic balls of burning gas that light up the sky and heat up planets around them. The sun is a star, for example.
Some stars are smaller and some are larger, but all of them share the same basic structure. The enormous nuclear furnace at the center of every star produces heat and light through fusion.
Stars are made up of mostly hydrogen and helium, but they contain small amounts of other elements. They are classified into three categories based on their luminosity, surface temperature, and mass.
To learn more about stars:https://brainly.com/question/13018254
#SPJ11
Related Questions
What is most nearly the coefficient of performance of a Carnot refrigeration cycle operating between -23.3 degrees C and -123.3 degrees C
Answers
The coefficient of performance of a Carnot refrigeration cycle operating between -23.3 degrees C and -123.3 degrees C is approximately 7.4.
The coefficient of performance (COP) of a refrigeration cycle is defined as the ratio of the desired cooling effect to the work input required to achieve that cooling effect. In the case of a Carnot refrigeration cycle, the COP can be determined using the formula COP = Tc / (Th - Tc), where Tc is the absolute temperature of the cold reservoir and Th is the absolute temperature of the hot reservoir.
To calculate the COP, we first need to convert the given temperatures from Celsius to Kelvin. The absolute temperature of the cold reservoir (Tc) is -23.3 degrees C + 273.15 = 249.85 K, and the absolute temperature of the hot reservoir (Th) is -123.3 degrees C + 273.15 = 149.85 K.
Substituting the values into the formula, we have COP = 249.85 K / (149.85 K - 249.85 K) = 249.85 K / (-100 K) = -2.4985.
The COP represents the efficiency of the refrigeration cycle, and it is defined as a positive value. Since the calculated COP is negative, it means that the cycle is not operating as a refrigerator but as a heat pump. To obtain the positive value of the COP, we take the absolute value, resulting in approximately 2.4985.
Therefore, the coefficient of performance of the Carnot refrigeration cycle operating between -23.3 degrees C and -123.3 degrees C is approximately 2.4985 or rounded to 2.5.
Learn more about Carnot refrigeration cycle here:
https://brainly.com/question/32357231
#SPJ11
The length of a soild of a metallic cube at 20°C is 5•0cm. Given that the linear expansivity of the metal is 4×^-5k^-1. Find the volume of the cube at 120°C. Find the volume of the cube at 120°C
Answers
Answer:
Explanation:
Length of one side of cube = 5 x 10⁻² m .
volume = ( 5 x 10⁻² )³
= 125 x 10⁻⁶ m³
Expression for thermal volume expansion is as follows :
V₂ = V₁ ( 1 + γ Δt )
V₂ and V₁ are volume before and after rise in temperature , γ is coefficient of volume expansion Δt is increase in temperature .
linear expansivity = 4 x 10⁻⁵ K⁻¹
coefficient of volume expansion γ = 3 x 4 x 10⁻⁵
= 12 x 10⁻⁵ K⁻¹
Putting the value
V₂ = 125 x 10⁻⁶ ( 1 + 12 x 10⁻⁵ x 100 )
= 125 x 10⁻⁶ + 125 x 10⁻⁶ x 12 x 10⁻³
= 125 x 10⁻⁶ + 1.5 x 10⁻⁶
= 126.5 x 10⁻⁶
= 126.5 cm³
a skydiver of mass 80kg jumpes from a plane. Taking g=m/s^2 write down the weight of skydiver
Answers
Answer:
800N
Explanation:
as we know that
weight = mass × acceleration due to gravity
= 80kg × 10 m/s^2
= 800N.
A ____________ is a condition or behavior that may threaten an individual's well-being
Answers
Answer:
yeah it may be a risk factor
Explanation:
Which two types of waves require matter in order to travel? A. Light waves B. Sound waves C. Electromagnetic waves D. Water waves
Answers
Answer:
b & c
Explanation:
because is my choice
two air columns, one open at both ends (a) and one closed at one end (b) have the same fundamental frequency. if the length of column a is 0.58 m, determine the length of column b.
Answers
The length of column b is 1.16 m. To solve this problem, we need to know the relationship between the length of an air column and its fundamental frequency.
For an air column open at both ends, the fundamental frequency is given by f = v/2L, where v is the speed of sound in air and L is the length of the column. For an air column closed at one end, the fundamental frequency is given by f = v/4L.
Since the two columns have the same fundamental frequency, we can set the two equations equal to each other and solve for the length of column b:
v/2L(a) = v/4L(b)
Simplifying this equation, we get:
L(b) = 2L(a)
Substituting the given value for L(a), we get:
L(b) = 2(0.58 m) = 1.16 m
To know more about frequency visit:-
https://brainly.com/question/29739263
#SPJ11
a storage tower of height 30 m and diameter 3 m supplies water to a home. the horizontal pipe at the base of the tower has a diameter of 1 inch which delivers water at a rate of 180 liters per minute. a smaller pipe of diameter 0.5 inches supplies the third floor of the house at a distance 7 m above ground. what is the water pressure on this pipe? neglect the viscosity of the water.
Answers
If the water's velocity is ignored, the pressure inside the pipe is 68,600 kg.m/s2.
Given height of storage tower (h) = 30m
diameter of tower (d) = 3m
The diameter of base of horizontal pipe (d1) = 1 inch
rate of water (r) = 180L/min
diameter of smaller pipe (d2) = 0.5inches
distance of third floor from ground (s) = 7m
Let the pressure of water on pipe be P
density of water = 1000
If we neglect the velocity of water then there is only one pressure that should be at which is potential pressure which is given by the equation
P = Density of water x Acceleration due to gravity (g)x height of fluid(h)
P = 1000 x 9.8 x 7 kg.m/s²
P = 68600 kg.m/s²
Hence If we ignore the water's velocity, the pressure on this pipe is 68600 kg.m/s2.
To learn more about pressure click here https://brainly.com/question/29341536
#SPJ4
Rock X is released from rest at the top of a cliff is on earth. A short time later, Rock y is released from rest from the same point as rock X. Both rocks fall for several seconds before landing on the ground directly below the cliff. Frictional forces are considered to be negligible. Which of the following graph correctly shows the vertical velocity of rock X as a function of time? Take the positive direction to the upward.
Answers
Answer:
The graph that correctly shows the vertical velocity is B. since the velocity is negative and increases linearly over time
Explanation:
When an object is dropped from rest its movement is ruled only by the effect of gravity.
The acceleration of gravity \(g=9.8\ m/s^2\) makes the object gain speed with a linear relation as shown:
vf = g.t
If we take the positive direction to be upward, then the speed will always be negative since the object will go against the positive direction.
Thus, the graph that correctly shows the vertical velocity is B. since the velocity is negative and increases linearly over time
From the given graphs, only the second graph (option B) started from rest (0) and later increased with time.
The given parameters;
Rock XRock yinitial velocity of Rock X = 0The final vertical velocity of the rock X after a short time "t" is calculated as follows;
\(v_y_f = v_y_i + gt\\\\v_y_f = 0 + 9.8t\)
The vertical velocity of the rock x will increase with time as it moves downwards.
Therefore, we can conclude that, from the given graphs, only the second graph (option B) started from rest (0) and later increased with time.
Learn more here:https://brainly.com/question/24508888
a particular cd player spins the cd at 500 rpm, and the track you are listening is at a radius of 5.00 cm from the center. what is its approximate speed in radians/second?
Answers
1/second Equals 1.99 x 10-7 radians. Earth rotates at a rate of 1.99 x 10-7 per second.
How do you convert radians to speed?If the angles were not approximately 1 one of, then the radius times the angle's measurement in radians, or the width of a arc s = r, would be the ratio of the distance by the point located on the circle. The result of substituting into the linear speed formula is v = r t or v = r t.
What is the name for angular speed?A pseudovector used in physics to express how quickly the angular location or orientation of an item changes over time is called an angular velocity or rotational velocity.
To know more about earth rotates visit:
https://brainly.com/question/1073674
#SPJ4
If gold has a mass number of 173 then it has how many neutrons?
Answers
Answer:
94
Explanation:
173 - 79 = 94
The number of electrons in a neutral atom is equal to the number of protons. The mass number of the atom (M) is equal to the sum of the number of protons and neutrons in the nucleus. The number of neutrons is equal to the difference between the mass number of the atom (M) and the atomic number (Z).
Mass number given: 173
Gold Atomic number: 79
Neutrons: 94
The horizontal displacement of a cart attached to the end of a spring is given by the following equation: y=(0.5m) sin (2/s t) determine the acceleration of the cart at time t = 3s.
Answers
The acceleration of the cart at time t = 3s in terms of the sine function: a = (-2π²m/s²)sin(6π).
To determine the acceleration of the cart at time t = 3s, we need to find the second derivative of the displacement equation with respect to time (t).
Given the displacement equation: y = (0.5m)sin(2πt/s)
First, let's find the first derivative (velocity):
v = dy/dt = (0.5m)(2π/s)cos(2πt/s)
Next, let's find the second derivative (acceleration):
a = dv/dt = d²y/dt² = (0.5m)(2π/s)(-2π/s)sin(2πt/s)
Substituting t = 3s into the equation:
a = (0.5m)(2π/s)(-2π/s)sin(2π(3)/s)
a = (-2π²m/s²)sin(6π)
Now we have the expression for acceleration at t = 3s. However, since the question does not provide a specific value for the constant m, we cannot calculate the exact numerical value of the acceleration. We can, however, express it in terms of the sine function:
a = (-2π²m/s²)sin(6π)
learn more about sine function from this link.
https://brainly.com/question/32247762
#SPJ11
What is an application of this model?
А
It highlights the artistic abilities of scientists.
B
It illustrates the basic structure of an atom. .
С
It shows how the parts of an atom interact.
D
It demonstrates how atoms form and function.
Answers
A 25.0 kg box of textbooks rests on a loading ramp that makes an angle α with the horizontal. The coefficient of kinetic friction is 0.250, and the coefficient of static friction is 0.350.
A) As α is increased, find the minimum angle at which the box starts to slip.
B）As this angle, find the acceleration once the box has begun to move
c) at this angle, how fast will the box be moving after it has slid a distance 4.7m along the loading ramp
Answers
(a) As σ is increased, The minimum angle will be "19.2°".
(b) The acceleration will be "0.91 m/s²"once the box has began to move.
(c) The speed will be "3 m/s" as the box slid a distance 4.7 m along the loading map.
According to the question,
Mass = 25.0 kg
Kinetic friction = 0.25
Coefficient of static friction = 0.35
(a) We know,
⇒ static friction = mg sine
⇒ mg cosine * u = mg sine
then,
tan A = u = 0.35
a = 19.2
Therefore, as α is increased, the minimum angle at which the box starts to slip is 19.2°.
(b) We know that:
Kinetic friction = mgCos19.2 * 0.25
= 2.31m
and,
Net force downwards = mgSin19.2 - mgCos19.2* 0.25
By substituting the values, we get
= m(3.22-2.31)
= 0.91m/s²
Therefore, As this angle, the acceleration once the box has begun to move at 0.91 m/s².
(c) since the box is sliding at a distance of 4.7 meter:
Thus,
The speed will be:
→ \(v^{2} - u^{2} + 2as\)
\(0 + 2* 0.91* 5\)
= 9.21
\(v = 3m/s\)
Therefore, at this angle, at 3m/s will the box be moving after it has slid a distance 4.7m along the loading ramp
Learn more about acceleration here:
https://brainly.com/question/12550364
#SPJ4
If the strength of a magnetic field at B is three units the strength of the magnetic field at A is ____?
Answers
If the strength of a magnetic field at B is three units the strength of the magnetic field at A, means that point B has three times more turns as compared to point A.
How strength of the magnetic field should be increased?We can increase the strength of the magnetic field by increasing the number of turns which increases the strength of the current flow.
So we can conclude that point B has three times more turns as compared to point A.
Learn more about magnetic field here: https://brainly.com/question/14411049
#SPJ1
True or False. The center of gravity and the center of mass are always the same in an object.
Answers
False, center of gravity and center of mass is not always the same.
What is center of gravity?
Center of gravity is a point from which the weight of a body or system may be considered to act.
What is center of mass?This is the point of concetration of the mass of the object with respect to a frame of reference.
Thus, we can conclude that center of gravity and center of mass is not always the same.
Learn more about center of gravity here: https://brainly.com/question/874205
#SPJ2
draw a figure of a simple pendulum explain its amplitude and effective length ?
Answers
Answer:
Explanation:
A simple pendulum consists of a mass (usually represented as a small object or bob) attached to a string or rod of negligible mass. The mass is free to swing back and forth under the influence of gravity.
In the figure, the point of suspension is denoted by "O," and the mass (bob) is represented by the small circle. The string or rod is represented by the vertical line connecting the point of suspension to the bob.
Amplitude:
The amplitude of a pendulum refers to the maximum displacement or swing of the bob from its equilibrium position. In the figure, the amplitude can be represented by the angle formed between the vertical position and the position of the bob when it swings to its maximum distance on one side. It is usually denoted by the symbol "A."
Effective Length:
The effective length of a pendulum refers to the distance from the point of suspension to the center of mass of the bob. It represents the distance over which the mass swings back and forth. In the figure, the effective length can be measured as the length of the string or rod from the point of suspension to the center of the bob. It is usually denoted by the symbol "L."
It is important to note that the amplitude and effective length of a simple pendulum affect its period of oscillation (the time taken for one complete swing). The relationship between these parameters and the period can be described by mathematical formulas.
Overall, the simple pendulum is a fundamental concept in physics and provides a simplified model for understanding oscillatory motion and the principles of periodic motion.
What is a landform created by plate motion?
Answers
Answer: Volcanoes and ridges are landforms that are created by the movement of tectonic plates.
Explanation:
Answer:
Volcanoes and ridges
Explanation: As the bottom plate is heated up by the Earth's hot mantle, a material called magma forms. It rises. Over time magma erupts through the plates. Many such volcanoes are found on "the Pacific Ring of Fire."
A monochromatic ray of light (f=5.09 x 10^14 Hz) travels from air into sodium chloride. Calculate the speed of light in sodium chloride.
Answers
Answer:
1.95 * 10^8 ms-1
Explanation:
Let us recall that;
Refractive index (n) = Frequency of light in air/Frequency of light in another medium
If Frequency of light in air = 5.09 x 10^14 Hz
Refractive index of sodium chloride = 1.54
Then;
Frequency of light in sodium chloride = Frequency of light in air/Refractive index of sodium chloride
Therefore;
Frequency of light in sodium chloride = 5.09 x 10^14 Hz/1.54
Frequency of light in sodium chloride = 3.31 x 10^14 Hz
So;
n= Frequency of light in air/Frequency of light in sodium chloride = Speed of light in air/speed of light in sodium chloride
speed of light in sodium chloride = Frequency of light in sodium chloride * Speed of light in air/Frequency of light in air
speed of light in sodium chloride = 3.31 x 10^14 Hz * 3 * 10^8 ms-1/5.09 x 10^14 Hz
speed of light in sodium chloride = 1.95 * 10^8 ms-1
if the flash to bang is 15 seconds, lightning is occurring how far away?
Answers
The lightning is occurring approximately 5.1 kilometers away if the flash to bang is 15 seconds. The speed of sound in dry air at a temperature of around 20 degrees Celsius is approximately 343 (m/s)
The flash to bang method is a way to estimate the distance of a lightning strike based on the time between seeing the flash of lightning and hearing the thunder. Sound travels at a speed of approximately 343 meters per second (m/s) in air. By multiplying this speed by the time interval between the flash and the bang, which is 15 seconds in this case, we can determine the distance.
To calculate the distance, we use the formula:
\(\begin{equation}\text{Distance} = \text{Speed} \times \text{Time}\)
Given that the time between the flash and the bang is 15 seconds, we can substitute the values into the formula:
\(\text{Distance} = 343\ \text{m/s} \times 15\ \text{s} = 5145\ \text{m} = 5.145\ \text{km}\)
Therefore, if the flash to bang is 15 seconds, the lightning strike is approximately 5.1 kilometers away.
Learn more about speed of sound here:
https://brainly.com/question/15381147
#SPJ11
What is the current in a circuit that has a resistance of 75Ω and a voltage drop of 120V across the cell? (I'll give brainliest!)
Answers
Resistance = (voltage) divided by (current)
= (120 V) / (0.5 Amp)
= 240 ohms .
Calculate the charge that flows through the cell in 1 minute. Each filament lamp has a power of 3 W and a resistance of 12 Ω
Answers
Answer:
24 Coulumbs
Explanation:
Given data
time= 1 minute= 6 seconds
P=2 W
R= 12 ohm
We know that
P= I^2R
P/R= I^2
2/12= I^2
I^2= 0.166
I= √0.166
I= 0.4 amps
We know also that
Q= It
substitute
Q= 0.4*60
Q= 24 Columbs
Hence the charge is 24 Coulumbs
Answer:
30C
Explanation:
its basically how the other guy did it but he worked it out with 2W instead of 3W so he got it wrong so its 30C and not 24C
An 8.5kg cat is running 1.8m/s. How much kinetic energy does it have?
Answers
Answer:
Im not sure if this is correct but it might be 15.3
Explanation:
8.5kg multiplied by 1.8 m/s is 15.3
Answer:
KE = 13.77 J
Explanation:
KE=1/2 mv^2
A body of mass 0.1kg tied by a string is rotating a vertical circle with a speed of 10 m/s of radius a 1 m . what is the tension experienced by the string at the highest point
Answers
Answer:
The tension experienced in the string at the highest point is approximately 9.019 Newtons
Explanation:
The mass of the body tied to the string, m = 0.1 kg
The path of motion of the mass = Vertical circular motion
The speed of rotation of the stone, v = 10 m/s
The radius of the circular motion path, r = 1 m
The required information = The tension at the highest point, T
At the highest point, the tension, 'T', comprises of the centrifugal force, 'F', acting upwards in the string and the weight, 'W' of the body acting downwards
∴ T = F - W
\(The \ centrifugal \ force, \ F = \dfrac{m \times v^2}{r}\)
Weight, W = m × g
Where;
g = The acceleration due to gravity ≈ 9.81 m/s²
Therefore;
The centrifugal force, F = 0.1 kg × (10 m/s)²/(1 m) = 10 N
The weight of the mass tied to the string, W ≈ 0.1 kg × 9.81 m/s² = 0.981 N
From which we have;
T = 10 N - 0.981 N = 9.019 N
The tension experienced in the string at the highest point ≈ 9.019 Newtons
The equation for free fall at the surface of some planet (s in meters, t in seconds) is s=1.33t^(2). How long does it take a rock falling from rest to reach a velocity of 27.2(m)/(s) on this planet?
Answers
To increase the boiling temperature of 2051 g of water by 1.500 °C, approximately 3.431 grams of NaCl would need to be added.
Explanation:
The boiling point elevation is determined by the molality of the solute in the solution. The equation for boiling point elevation is:
ΔTb = Kb * m
Where:
ΔTb is the boiling point elevation,
Kb is the boiling point elevation constant for water (0.5100 °C/m),
m is the molality of the solute.
To calculate the molality, we can use the formula:
m = (moles of solute) / (mass of solvent in kg)
Given that we want to increase the boiling temperature by 1.500 °C, and the Kb value is 0.5100 °C/m, we can rearrange the equation to solve for the molality:
m = ΔTb / Kb
m = 1.500 °C / 0.5100 °C/m
m ≈ 2.941 m
To convert molality to mass, we need to know the molecular weight of NaCl. The molecular weight of NaCl is approximately 58.44 g/mol.
Using the formula:
mass of solute = molality * molecular weight of solute * mass of solvent in kg
mass of solute = 2.941 m * 58.44 g/mol * 2.051 kg
mass of solute ≈ 3.431 g
Therefore, approximately 3.431 grams of NaCl would need to be added to 2051 g of water to increase the boiling temperature of the solution by 1.500 °C.
Learn more about boiling point elevation and the calculation of molality in solution chemistry. #SPJ11
The equation for free fall at the surface of some planet (s in meters, t in seconds) is s=1.33t^(2), the long it take a rock falling from rest to reach a velocity of 27.2(m)/(s) on this planet is 1.414 seconds.
Free fall is a type of movement that an object undergoes when it falls freely under the effect of gravity. Gravity is a force that acts on every object and makes it move towards the center of the earth or any other celestial body. The acceleration due to gravity is expressed as g, and it is equal to 9.8 m/s² on earth. The time it takes a rock falling from rest to reach a velocity of 27.2 m/s on this planet can be calculated by equating the acceleration due to gravity with the given velocity.
The formula for velocity is given by V=U+at, where V is the final velocity, U is the initial velocity, a is the acceleration, and t is the time taken to reach the final velocity. Under free fall, the initial velocity is zero; therefore, the formula can be simplified to V = at.
Substituting the given values in the formula, we get 27.2=1.33t² × g or 27.2=1.33t² × 9.8.
We can simplify this equation to t² = (27.2)/(1.33 × 9.8) or t² = 2.
The square root of 2 is 1.414. Therefore, the time taken for the rock to reach a velocity of 27.2 m/s on this planet is 1.414 seconds.
Learn more about free fall at:
https://brainly.com/question/31260515
#SPJ11
what is the average speed between 0 seconds and 6 secs?
Answers
Answer:
may be 6 seconds i think so
A car slows from 90mi/he to 55mi/hr when it sees the police what's the cars acceleration
Answers
Describe how you would measure the volume of Cork using a sinker,a thread,a measuring cylinder and water only.
Answers
Answer:
Wrap the cork in the thread, put it in the water and then pour the water with the cork in the measuring cylinder.
Explanation:
PLEASE HELP 40 POINTS
A car of mass 700 kg and moving at a speed of 30 m/s collides with a stationary truck of mass 1400 kg, and the two vehicles lock together on impact. The combined velocity of the car and truck after the collision is m/s.
Answers
A scientist claims that a certain chemical will make fabric waterproof. Which
option describes a controlled experiment that will produce evidence that will
support or refute her claim?
A. Two groups of fabric are treated with the chemical. One group is
cotton and the other is polyester. Then each group is exposed to
water.
B. One group of fabric is treated with the chemical, and the other
group is not. Then each group is exposed to water.
C. One group of fabric is treated with a small amount of the
chemical, and the other group is treated with a large amount. Then
each group is exposed to water.
O D. Two groups of fabric are treated with the chemical. Then one
group is exposed to a small amount of water, and the other group
is exposed to a large amount.
Answers
Answer:
B. One group of fabric is treated with the chemical, and the other group is not. Then each group is exposed to water.
Explanation:
what is the economic system in the united states?
A. Capitalist economy
B. Stock Market economy
C. Global economy
D. Communist economy
Answers
Answer:
A. Capitalist economy
Explanation:
The United States is a capitalist economy. Hope this helps, thank you !!