Spectroscopy is the technique that astronomers most frequently apply to determine the creation of stars, planets, and other objects.
The study of how light and other types of radiation are absorbed and emitted by materials is known as spectroscopy. It entails separating light (or more specifically electromagnetic radiation) into its individual wavelengths (a spectrum), much as how a prism divides light into a rainbow of colors.The most well-known astronomical object is a star, which also serves as the primary component of galaxies. A galaxy's history, dynamics, and evolution can be traced by the age, distribution, and composition of its stars. Additionally, stars produce and distribute heavy elements like carbon, nitrogen, and oxygen, and their features are closely related to those of any planetary systems that may form around them. As a result, the core of astronomy is the study of the creation, evolution, and demise of stars.Therefore , on conclusion i.e. each element has its own unique set of wavelengths that it can absorb light at. Based on these wavelengths, astronomers can determine the composition of an object from its spectra. Spectroscopy is the technique that astronomers most frequently apply to determine the build of stars, planets, and other objects.
To know more about Spectroscopy
https://brainly.com/question/28871771
#SPJ1
its is but also not a math question
The distance travelled by the car on the first hour of the trip is 80 km, the average speed for the first hour of the trip is 80 kmph and for the first four hours of the trip is 92.5 kmph
v = d / t
v = Velocity
d = Distance
t = Time
For the first one hour,
d = 80 km
t = 1 hr
v = 80 / 1
v = 80 kmph
For the first four hours,
d = 370 km
t = 4 hr
v = 370 / 4
v = 92.5 kmph
Therefore,
Distance travelled in first 1 hour = 80 kmAverage speed in first hour = 80 kmphAverage speed in first four hours = 92.5 kmphTo know more about average velocity
https://brainly.com/question/862972
#SPJ1
A visible light wave has a wavelength of 450 nm (i.e. 4.5 x 107 m)
Calculate its frequency using the equation v= fxλ
Show your working and give your answer to 3 significant figures.
Frequency: .......
Hz
Answer:
Approximately [tex]6.67 \times 10^{14}\; {\rm Hz}[/tex], assuming that the wavelength was measured in vacuum.
Explanation:
Let [tex]v[/tex] denote the speed of the wave, [tex]f[/tex] the frequency of the wave, and [tex]\lambda[/tex] the wavelength of this wave. It is given that [tex]v = \lambda\, f[/tex].
It is given that the wavelength of this light is [tex]\lambda = 450\; {\rm nm} = 4.50 \times 10^{-7}\; {\rm m}[/tex]. Assume that this wavelength is measured when the light beam is in vacuum, where the speed of light (wave speed) is [tex]v = c \approx 3.00 \times 10^{8}\; {\rm m\cdot s^{-1}}[/tex].
Rearrange the equation [tex]v = \lambda\, f[/tex] to find the frequency [tex]f[/tex] of this wave:
[tex]\begin{aligned} f &= \frac{v}{\lambda} \\ &\approx \frac{3.00 \times 10^{8}\; {\rm m\cdot s^{-1}}}{4.50 \times 10^{-7}\; {\rm m}} \\ &\approx 6.67 \times 10^{14}\; {\rm s^{-1}}\end{aligned}[/tex].
Note that [tex]1\; {\rm Hz}[/tex] is equivalent to [tex]1\; {\rm s^{-1}}[/tex]. Therefore, the frequency of this wave would be [tex]f \approx 6.67 \times 10^{14}\; {\rm Hz}[/tex].
How many moles of ch4 are contained in 112 g of that substance? the molar mass of ch4 is 16 g/mol.
7 moles of CH₄ are contained in 112 g of that substance.
Describe the molar mass in detail?The weight of a single mole of a substance is its molar mass. The word "molar mass" refers to the amount of a certain chemical in grams that makes up one mole. The periodic table contains a list of the atomic masses that were utilized to compute the molar mass. The Avogadro's number reveals the number of particles in each mole.
The molar mass, also referred to as the molecular weight, is the total mass of the atoms needed to create a molecule per mole, represented in grams. Grams per mole are used to express molar mass.
Given mass = 112 g
Molar mass of CH₄ = ( 1 x 12 ) + ( 4 x 1) = 16 gmol-1
Number of moles = mass / Molar mass
Number of moles = 112 g / 16 gmol-1
Number of moles = 7 moles
To know more about molar mass visit:
https://brainly.com/question/29214201
#SPJ4
In an element’s square on the periodic table, the number with the greatest numerical value represents the
Determine the required radius for the Sun to become a Black Hole. Write the name for the radius
Given:
The mass of the sun is
[tex]M_{sun}=1.989\times10^{30}\text{ kg}[/tex]The universal gravitational constant is
[tex]G\text{ = 6.67}\times10^{-11}\text{ Nm}^2\text{ /kg}^2[/tex]The speed is
[tex]c=\text{ 3}\times10^8\text{ m/s}[/tex]To find the required radius for the sun to become a black hole.
Explanation:
The radius can be calculated as
[tex]\begin{gathered} r=\frac{2GM}{c^2} \\ =\frac{2\times6.67\times10^{-11}\times1.989\times10^{30}}{(3\times10^8)^2} \\ =2948\text{ m} \end{gathered}[/tex]The name of the radius is Schwarzschild radius.
The table below shows the distances of five planets from the sun.
If a spacecraft travels 3.6 AU per year, in how many years would it travel from Earth to Venus? (1 point)
O 0.05 years
O 0.07 years
O 0.08 years
O 0.09 years
Answer:
0.08 years
Explanation:
help me with this please full calculations
Helping is melting please
f(x) means a function of x. In this case, the function of x is 3x - 5
So if you have f(2), apply the function with the value of x equal to 2. In this case, just plug 2 into the equation where x is :
f(x) = 3x - 5
f(2) = (3)2 - 5
f(2) = (3 . 2) - 5
f(2) = 6 - 5
f(2) = 1
The function is shown in the figure below. Since this is a linear function we can see that the graph intersects the x-axis at only one point. This equation is a linear equation with two variables. Since there is a unique value of y for every value of x, we find them accordingly and set x = 0, then y = 5. So (0.5) is the answer you get. F values are used in the analysis of variance (ANOVA). It is calculated by dividing the two mean squares. This calculation determines the ratio of explained to unexplained variance. The F distribution is a theoretical distribution.
Learn more about A function here:-https://brainly.com/question/11624077
#SPJ1
Determine the weight on the moon of a person whose weight on the earth is 190 pounds.
Answer: Weight = 140.05 N
Explanation:
The formula for calculating weight of an object on the moon is expressed as
weight = mg
where
m = mass of the object
g = acceleration due to gravity of the moon
From the information given,
m = 190 pounds
We would convert 190 pounds to kg
1 pound = 0.45359237 kg
190 pounds = 190 x 0.45359237 = 86.183 kg
g = 1.625 m/s^2
Thus,
w = 86.183 x 1.625
w = 140.05 N
True or False—Tension is the result of opposite forces in a connector, such as a string, rope, chain or cable, that pulls each point of the connector apart in the direction parallel to the length of the connector. At the ends of the connector, the tension pulls toward the center of the connector.
Tension is the result of opposite forces in a connector. The tension pulls each object towards the center of the connector. Thus, the given statement is true.
What is Tension?
Tension is the opposite force that is exerted by a rope, string, cable, or similar object on one or more objects. Anything which is pulled, hung, supported, or swung from a rope, string, and cable, etc. is subjected to the tension force. Like all the other forces, tension can also accelerate objects or cause them to deform from their original structure.
Newton's third law is that when a contact force acts between any two objects, both the objects experience the same magnitude of force, but in opposite directions to each other. In tension, the two objects which are attached with the rope pull on each other.
To determine the magnitude of tension, a formula is used:
2T sin(α) = m × g
where m × g represents is the weight of the suspended object.
Learn more about Tension here:
https://brainly.com/question/14294135
#SPJ1
What type of motion is solved by using two components of horizontal and vertical direction.
cm. the current in the solenoid is increasing at a uniform rate of 36.0 a>s. what is the magnitude of the induced electric field at a point near the center of the solenoid and (a) 0.500 cm from the axis of the solenoid; (b) 1.00 cm from the axis of the solenoid?
The induced emf near the solenoid's center has a magnitude of 0 V/m.
At a location 0.500 cm from the solenoid's axis, the induced electric field has an intensity of 8 x 105 V/m.
the settings provided;
N = 700 turns/m for the solenoid's number of turns, and r = 2.5 cm for the wire's radius. I = 36 A/s for the solenoid's current.The following formula is used to determine the size of the induced emf close to the solenoid's center:
B = 4π × 10⁻⁷ × 700 × 36
= 0.032 T/s
E = r/2(dB/dt)
E = 0/2*(0.032)
E = 0 V/m
The following formula is used to determine the strength of the induced electric field at a position 0.500 cm from the solenoid's axis:
E = r/2(dB/dr)
E = {(0.5 * 10⁻²)/2}*(0.032)
E = 8 × 10⁻⁵ V/m
Please visit the following page to learn more about solenoids:
https://brainly.com/question/14003638
#SPJ4
You place a box weighing 307.4 N on an inclined plane that makes a 44◦ angle with the horizontal.
The vertical component of the box's weight is 221.1 N.
What is the vertical component's of the box weight?
The vertical component of the box's weight is the weight of the box acting along the vertical direction of the inclined plane.
Mathematically, the formula for calculating the vertical component of the box's weight is given as;
Wn = mg cosθ
where;
m is mass of the boxθ is angle of inclination of the planeg is acceleration due to gravityWn = W cosθ
where;
W is weight of the boxWn = 307.4 N x cos(44)
Wn = 221.1 N
Learn more about vertical force of weight here: https://brainly.com/question/15072198
#SPJ1
The complete question is below;
You place a box weighing 307.4 N on an inclined plane that makes a 44◦ angle with the horizontal. Find the vertical component of the box's weight.
A quarterback throws the football to a stationary receiver who is 28.4 m down the field.
The football is thrown at an initial angle of 38.6 to the ground.
The acceleration of gravity is 9.81 m/s?.
a) At what initial speed must the quarterback throw the ball for it to reach the receiver?
Answer in units of m/s.
The following question is about football movement and can be answered by using the equations of projectile launch :
Initial speed is: v = 16.89 m / s
Maximum height is: y = 14.26m
Given parameters
Horizontal distance x = 28.4 m
Launch angle tea = 38.6º
To find,
The initial speed and the maximum height
R = [tex]v^{2}[/tex]sin2θ/g
[tex]v^{2}[/tex]= g*r/sin2θ
calculating,
v² = 9.8 *28.4 / sin (2 *38.6)
=[tex]\sqrt{278.32/0.9751}[/tex]
v = 16.89 m / s
The vertical speed is zero when height maximum.
v² = v² - 2 g y
0 = v² - 2g y
y = v²/2g
y = 14.26m
Initial speed is: v = 16.89 m / s
Maximum height is: y = 14.26m
To learn more about projectile launch numerical, visit
https://brainly.com/question/25686714
#SPJ13
Which of the following statements is NOT true about wave packets and their use in describing particles?
a. A wave packet is fundamentally a region over which a number of waves of different frequencies and amplitudes are added together to form a non-zero result.
b. The movement and travel of a wave packet is governed by the phase velocity.
c. An important property of a wave packet describing a particle is the superposition of many different waves.
d. The particle can be described using Fourier series and a Fourier integral.
e .An important property of a wave packet describing a particle is the localization of wave amplitude.
Answer:
b) is not true - the movement and travel of a wave packet is governed by the "group" velocity of the packet not the phase velocity
The movement and travel of a wave packet are governed by the "group" velocity of the packet, not the phase velocity, so option B is not a true statement.
What are wave packets?
A collection of waves with roughly the same momentum is referred to as a wave packet. Localization of particles can be achieved by combining waves into wave packets. The area where the particle is most likely to be discovered is indicated by the wave packet's envelope. This region spreads at the speed of a classical particle.
According to Heisenberg's principle, some uncertainty in the momentum must be permitted in order to gain some localization of the position of a paragraph. Therefore, you must assume that the initial quantum space wave function is nonzero for at least a brief range of various quantum values. A wave packet is a combination of constituent waves of this kind.
The movement and travel of a wave packet are governed by the "group" velocity of the packet, not the phase velocity.
To know more about wave packets:
https://brainly.com/question/13354635
#SPJ12
young stars that vary erratically in luminosity and have especially strong stellar winds are called
Young stars that vary erratically in luminosity and have especially strong stellar winds are called T-Tauri stars.
What is luminosity physics?The entire amount of energy generated by various celestial bodies (stars, galaxies) per unit of time is referred to as luminosity, which would be essentially measured in joules per sec or watts in SI units.
Does luminosity mean light?The characteristic of something that emits light or glows with reflected light is called luminosity. The brilliance of a huge, sparkling diamond is what is most striking. You might use the word "luminosity" to describe a vivid and colorful oil painting or to praise the brightness of a spectacular sunset.
To know more about luminosity visit:
https://brainly.com/question/14140223
#SPJ4
A girl throws a basketball vertically into the air. What is true about the basketball at the highest point?
A body starts from rest and gains a velocity of 6 m/s in 2s of time. Find the acceleration of the body and its average velocity for the given time:
The acceleration of the body would be 3m/s^2 when a body starts from rest and gains a velocity of 6m/s in 2 second of time.
What is acceleration and average velocity and how it is calculated out to be so ?Acceleration is the quantity representing the change in velocity per unit time of the body in motion.Here in this question is given the velocity to be 6m/s and the time is 2 seconds, .To calculate the acceleration = velocity / time = 6/ 2 = 3 m /s^2 is the acceleration of the body.Average velocity is the quantity depicting the displacement per unit time of the body in motion.So the acceleration of the body when it starts from rest and gains a velocity of 6 m/s in 2 second of time is 3 m/s^2.To know more about acceleration visit:
https://brainly.com/question/12550364
#SPJ10
all of its output energy is absorbed in a detector that measures a total energy of 0.53 j over a period of 34 s . how many photons per second are being emitted by the laser?
Given that detector measures total energy of 0.53 J over a period of 34s. Photons per second emitted by the laser is 7.84 x 10¹⁶ photons/s
Device that emits a beam of coherent light through an optical amplification process is called Laser. Types of lasers include gas lasers, fiber lasers, solid state lasers, dye lasers and diode lasers .
Given total energy = 0.53 J
period = 34 s
As we know Wavelength of the Photon = 989 nm
Energy of single photon is given by formula,
E= hc/λ
Total energy= (6.626* 10^-34*2.998*10^8)/(989*10^-9)
= 2.01 *10^-19 J
Time period = 34s
Energy absorbed per sec = 0.53/34= 0.0155 J/s
Energy of a photon= 2.01*10^-19 J
Number of photons emitted per second is = 0.0155/2.01*10^-19
= 7.711* 10^16 J/photon
Number of photons = 7.771 x 10¹⁶ photons/s
To know more about laser, refer
https://brainly.com/question/13621353
#SPJ4
a tsunami question 1 options: a) is a special kind of tidal wave caused by the gravitational attraction of the sun not the moon. b) can get big but never bigger than 30 feet high. c) is dangerous near its source but dies out within about 200 miles. d) may be just a broad, gentle swelling out at sea but grows as it approaches shore.
A tsunami may begin as a broad, gradual swelling at sea but grows closer to land.
The tsunami is what?Ocean waves called tsunamis are caused by: large earthquakes that take place near or beneath the ocean. lava outbursts. landslides underwater. Onshore landslides that release a lot of debris into the water
What is a landslide catastrophe?Landslides happen when sloped ground becomes unstable. Earth, rocks, mud, and any other debris that may be trapped in its wake can all be found in the unstable terrain that collapses and pours down the side of a hill or mountain. Landslides can cause significant harm if they happen close to populated areas.
to know about tsunami visit-
https://brainly.com/question/12908014
#SPJ13
Can someone Please help me? One of the main disadvantages of incandescent lights is that _________.
the light they cast is hard on the eyes
only 10% of the energy makes light
they need extra sockets to be used in a normal house
Answer: Only 10% of the energy makes light
Explanation:
What is the mass of a truck if it produces a force of 14,000 N while accelerating at
a rate of 5 m/s² ?
F=_
m=
a=
Both the truck's force and its rate of acceleration are provided to us: Force applied (F) = 14,000 N, Acceleration (a)= 5 m/s².
Calculating,
the truck's mass using Newton's second law of motion.
F = ma
(where F is the applied force, m is the object's mass, and an is the object's acceleration.)
replacing the variables:
14000 = (m)* 5
m = 14000/5
m = 2800kg
Therefore,
the mass of truck is 2800 kg
Learn more about force numerical, here:
https://brainly.com/question/18713602
#SPJ13
what is wg , the work done on the block by the force of gravity as the block moves a distance l up the incline? express the work done by gravity in terms of the weight w and any other quantities given in the problem introduction.
Work done on the block by the force of gravity as the block moves a distance L up the incline is - m*g*l*sinФ.
To move an object, it should be first transferred to energy. Transferring energy may be in the method of force. The quantity of energy transferred by the force to move an object is known as work done.
To express mathematically, work is equal to the force times the distance W = fd.
If force is exerted at an angle θ to the displacement then the work done is given by W = fd cos θ
Given,
applied force=F
angle=Ф
We have to evaluate work done by the force due to gravity,
We know that g= 9.8 m/s^2
Work done= m*g* sinФ * l *cos 180° +m*g* l *cos 90°
w = -m*g* sinФ* l + m*g *cosФ* l *0
As we know, cos 180° = -1
and cos 90° = 0
w = - m*g*l*sinФ
Hence, the work done on the block by the force of gravity as the block moves a distance L up the incline= - m*g*l*sinФ
To know more about work, refer
https://brainly.com/question/25573309
#SPJ13
Identify the nature and point of action of the third force acting on the wheelbarrow.Write down an equation showing the relationship between the three forces
Wheelbarrow is a small cart which has a wheel in the front, and two supporting legs and two handles in the back. It is used for carrying loads.
Wheelbarrow is a second class lever. The three forces acting on a wheelbarrow are input force (applied force to move), output force (due to load) and the force due to fulcrum (or wheel) on one end.
The applied force and force due to wheel are in opposite directions, one acting upward and the other acting downward. The load force will be in between the applied force and the force due to wheel.
To learn more about levers click here https://brainly.com/question/20864652.
#SPJ1
factors affecting flotation
Answer:Buoyancy
Explanation: if you need to float you will need an equal buoyancy force to gravity like supposing a boat is 300Kg and its buoyancy force is so high that it matched perfectly with the force of gravity it would float
how does the force of friction for a sliding object vary with speed?
The friction and the velocity of the object are inversely proportional to each other.
The velocity of the object sliding over a rough surface decreases with the increase in friction.
Let us assume that ab object is sliding over a rough surface.
Now, if the object is at rest, the static friction completely keeps the object at rest.
While sliding, the friction opposes the motion of the body.
If an object is sliding on a surface with some velocity and no external force is applied. The velocity will decrease in sometime and will become zero.
If an external force is applied in the direction of motion of object, the friction will be in work but it will work only as a opposing force. So, it will always try to decrease the velocity.
To know more about Friction, visit,
https://brainly.com/question/24338873
#SPJ4
uppose a heat engine absorbs 2,403 j from the hot reservoir while rejecting 931 j to the cold reservoir. calculate the engine's efficiency.
Suppose a heat engine absorbs 2,403 j from the hot reservoir while rejecting 931 j to the cold reservoir. The engine's efficiency is 0.62
What is heat engine?A heat engine is a device used in engineering and thermodynamics that transforms heat into mechanical energy that may be utilized to do mechanical labor. It accomplishes this by lowering the temperature of a functioning substance from its higher condition.
Efficiency may be represented as a ratio: output input. The total amount of beneficial work accomplished, excluding waste and spoilage, is known as output or work output. Efficiency can also be expressed as a percentage by dividing the ratio by 100.
η = 1 - (931/2403)
= 0.62
Heat engine absorbs 2,403 j from the hot reservoir while rejecting 931 j to the cold reservoir. The engine's efficiency is 0.62.
To learn more about heat engine refer to the link:
brainly.com/question/28034387
#SPJ1
20 points please help and explain thank you so much!!!A car traveling north at a velocity of 15m/s needs to pass a slower moving vehicle. The driver of the car speeds up to 20 meters per second to get around the slower vehicle. The passing time is 5.8 seconds. What is the car's acceleration?
The acceleration of the car when get around the slower vehicle is 0.86m/s².
The initial velocity U of the car is 15m/s.
The final velocity V of the car is 20m/s.
The time taken by the car to overtake the slow vehicle is 5.8 seconds.
To find the acceleration of the car, we can use the equation of motion,
The equation is,
V = U + at
Where,
V is final velocity of object,
U is the initial velocity if the object,
a is the acceleration of the body,
t is the time taken by the body to accelerate,
Putting all the values of find the acceleration a of the car,
V = U + at
20 = 15 + a5.8
5 = a5.8
a = 5/5.8
a = 0.86 m/s².
So, the acceleration of the car is 0.86 m/s
To know more about the acceleration, visit,
https://brainly.com/question/460763
#SPJ1
An object has a kinetic energy of 180 J and a mass of 45 kg, how fast is the object
moving?
Your answer
An object has a kinetic energy of 180 J and a mass of 45 kg, The object is moving fast with 2.83 m/sec
What is kinetic energy?Kinetic energy is the energy of motion, which can be observed as an item, particle, or collection of particles moving. Kinetic energy is used by any moving object: a person walking, a baseball being thrown, a crumb falling off a table, and a charged particle in an electric field are all instances of kinetic energy at work.
Given that,
Kinetic energy (K.E) = 180 J
Mass (m) = 45 kg
As we know, K.E = [tex]\frac{1}{2}mv^{2}[/tex]
Now we have to calculate the speed or velocity (v)
v = [tex]\sqrt{(2*K.E.)/m}[/tex]
v = [tex]\sqrt{(2*180)/45}[/tex]
v = 2.83 m/sec
To know more about kinetic energy refer to,
https://brainly.com/question/25959744
#SPJ9
A cheetah can run at a maximum speed 105 km/h and a gazelle can run at a maxi- mum speed of 73.5 km/h. if both animals are running at full speed, with the gazelle 99 m ahead, how long before the cheetah catches its prey?
If both animals are running at full speed, with the gazelle 99 m ahead, cheetah will catch its prey after 331 m
v = d / t
v = Velocity
d = Distance
t = Time
Let the distance covered by the gazelle be x.
For cheetah,
v = 105 km / h
d = ( 99 + x ) m
t = d / v
t = 105 / ( 99 + x ) s
For gazelle,
v = 73.5 km / h
d = x m
t = d / v
t = 73.5 / x
The time taken by both cheetah and gazelle will be the same when the cheetah catches its prey.
105 / ( 99 + x ) = 73.5 / x
105 x = 7276.5 + 73.5 x
31.5 x = 7276.5
x = 231 m
Distance travelled by cheetah = ( 99 + x ) m
Distance travelled by cheetah = ( 99 + 231 ) m
Distance travelled by cheetah = 331 m
Therefore, the cheetah will catch its prey after 331 m
To know more about velocity
https://brainly.com/question/19979064
#SPJ1
the most severe diffuse brain injury caused by rotational acceleration is most likely to be located in the: a. medial portion of the brainstem. b. diencephalon to the brainstem. c. diencephalon. d. entire brainstem.
The most severe diffuse brain injury caused by rotational acceleration is most likely to be located in the option (d) entire brainstem is correct.
What is rotational acceleration?Angular acceleration is the term used to describe the temporal pace at which angular velocity varies.
The SI of measurement is radians per second per second.
v = ω × r . The equation of angular velocity can be obtained by rewriting this expression as follows: = r v / |r|2, where all of these variables are vectors and |r| stands for the absolute value of the radius.
Rotational acceleration is a type of brain damage brought on by a traumatic event in which the body's pace is disrupted and the head moves freely, out of step with the body's neck, chest, and/or lower limbs.
To know more about rotational acceleration visit:
https://brainly.com/question/9614521
#SPJ4
