The option that is NOT something that would lead astronomers to believe a black hole might be close-by in space is option C: an object that has height and depth but no width.
What is a black hole that can be close-by in space?There is said to be a wandering black hole that can be seen in an approximately 5,000 light-years away from earth.
It is one that can be seen in the Carina-Sagittarius spiral aspect of our galaxy.
Note that, its discovery gives room for astronomers to state that the nearest form of isolated stellar-mass black hole to Earth can be as close as about 80 light-years away.
Therefore, The option that is NOT something that would lead astronomers to believe a black hole might be close-by in space is option C: an object that has height and depth but no width because it has no width, no depth and no height.
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The Sun is lower in the sky during the winter than it is during the summer. (b) How does this change affect the weather?
When the Sun is lower in the sky during the winter than it is during the summer, reduced flux results, on the average, causes colder weather while increased flux causes hot weather.
The sun's rays strike the Earth at an acute angle during the summer. Because the light does not spread as much, the quantity of energy striking any specific location is increased. Furthermore, the lengthy daytime hours give the Earth plenty of time to warm up or become hot. In contrast, during the winter, the sun's rays strike the Earth at a shallow angle. These beams are more dispersed, reducing the amount of energy that impacts any specific place. Furthermore, the long nights and short days keep the Earth from overheating. As a result, we have cold weather.
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Why is the following situation impossible? A team of researchers discovers a new gas, which has a value of γ = C_P / C_V of 1.75.
A team of researchers discovers a new gas, which has a value of 1.75 which is impossible. Because the value of the heat capacity is 1.66.
What is the heat capacity ratio?The heat capacity ratio sometimes referred to as the adiabatic index, the ratio of specific heat, or Laplace's coefficient in heat engineering and thermodynamic parameters, is the fraction of the heat capacity at constant pressure [tex]( \rm C_P)[/tex] to the heat capacity at constant volume [tex](\rm C_V)[/tex].
For the mono-atomic gases, the heat capacity ratio is maximum, then it decreases with bi-atomic gases, and it further decreases for tri-atomic gases.
A group of scientists finds a new gas with a heat capacity of 1.75 which is impossible. Due to the maximum heat capacity value is 1.66.
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An engineer at NASA is investigating the impact of meteorites on planets. He performs experiments in a vacuum by dropping metal spheres of different sizes and different heights above a horizontal bed of sand. In one experiment, a metal sphere of mass 0.1 kg is dropped from a height of 1.2 m. The sphere makes a depression in the sand of 2 cm. [Gravitational field strength, g = 10 Nkg -1 ] i) Calculate the potential energy of the sphere at a height of 1.2 m [2 marks]
The potential energy of the sphere at a height of 1.2 m is 1.2 J.
The gravitational potential energy of an object is defined as the energy stored inside a body due to virtue of its position.
The equation for calculating the potential energy(PE) is as follows:
PE = mgh
Here m is the mass of the body
g is the acceleration due to gravity
h is the height of the body above the ground level/reference level
Putting m = 0.1 kg, h = 1.2 m and g = 10 m/s^2
PE = 0.1 x 1.2 x 10 = 1.2 J.
Thus, the potential energy of the sphere at a height of 1.2 m is 1.2 J.
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A proton, an electron, and a helium nucleus all move at speed v . Rank their de Broglie wavelengths from largest to smallest.
Ranking of de Broglie wavelengths from largest to smallest is electron > proton > helium
De Broglie proposed that because light has both wave and particle properties, matter exhibits both wave and particle properties. This property has been explained as the dual behavior of matter.From his observations, de Broglie derived the relationship between the wavelength and momentum of matter. This relationship is known as de Broglie's relationship
De Broglie's relationship is given by [tex]\lambda=\frac{h}{mv}[/tex] .....(1) , where λ is known as de Broglie wavelength and m is mass , v is velocity , h = Plank’s constant.
From equation (1) wavelength and mass has an inverse relation .
Mass of helium is 4 times the mass of the proton and proton has a greater mass than electron.
According to equation (1) , less the mass higher will be the wavelength
Hence electron having less mass have higher wavelength and then proton and then helium having large mass will have less wavelength .
Thus, order should be electron > proton > helium .
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Celia and jane are on the roof of their school. Each woman has an identical ball that they release from the roof at the same time. However, while celia drops her ball from rest, jane releases her ball with a small horizontal velocity. Assuming that air resistance is negligible, which ball will hit the ground first?.
Answer:
Jane's ball will hit the ground first
how many picoseconds are there in 1 Ms?
(a) a spring stretches by 0.015 m when a 1.75 kg object is suspended from its end. what is its spring constant? (b) how much mass should be attached to the spring so that its frequency of vibration is f
(a) Total force along y axis,
∑F =ma=0
kx−mg=0 ⇒k= [tex]\frac{mg}{x}[/tex]
The spring constant is, k is
k=(1.5)×(9.8)/(0.020)=14.7/0.020 =735N/m
(b) Frequency f = [tex]\frac{1}{2} \pi[/tex] [tex]\sqrt{\frac{k}{m} }[/tex] ⇒ 4[tex]\pi ^{2}[/tex][tex]f^{2}[/tex] = [tex]\frac{k}{m}[/tex]
[tex]\frac{k}{4\pi ^{2}f^{2} }[/tex]= m ⇒ m = (735)4[tex]\pi ^{2}[/tex](3.0)(0.3)
=(735)×4×(3.75)×(3.75)×(9.0)
=735×4×9.85×9.0=7354×9.85×9.0
=735354.6 N
=2.07kg
The spring constant is the force required to stretch or compress the spring divided by the distance the spring is lengthened or shortened. It is used to determine the stability or instability of a spring and thus the system for which it is intended. It is denoted by k.
Therefore the spring constant is 735 N/m and the mass should be 2.07kg.
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You exert a force of 100N on a rope that pulls a sled across a flat icy surface. The rope is oriented 30 degrees above the horizontal. The sled has a mass of 10kg and it is carrying a 30kg child. The sled starts at rest. You can assume friction is negligible.
You reach a hill and start going up, still applying a constant 100N force at 30 degrees from the slope. The sled is now moving at constant speed. What is the angle of the slope?
The angle of slope if the sled carrying a 30 kg child which is moving at a constant speed is 12.7°
Given that,
Force, F = 100 N
Mass, m = 10 + 30 = 40 kg
Angle at which the force is applied, θ = 30°
Resolving the force applied into its horizontal and vertical components,
cos θ = [tex]F_{x}[/tex] / F
[tex]F_{x}[/tex] = 100 * cos 30° = 100 * 0.866
[tex]F_{x}[/tex] = 86.6 N
A force due to the weight of the cart is applied on the ground which is directly vertical downwards. But the slope is at an angle. So resolving this force into its horizontal and vertical components.
sin θ = [tex]w_{x}[/tex] / w
w = m g
w = 40 * 9.8
w = 392 N
Given that the velocity when travelling up the slope is constant. So the acceleration is zero.
Σ [tex]F_{x}[/tex] = m a = 0
[tex]F_{x}[/tex] - [tex]w_{x}[/tex] = 0
[tex]w_{x}[/tex] = 86.6 N
θ = [tex]sin^{-1}[/tex] ( 86.6 / 392 ) = [tex]sin^{-1}[/tex] ( 0.22 )
θ = 12.7°
Therefore, the angle of slope if the sled carrying a 30 kg child which is moving at a constant speed is 12.7°
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based on the knowledge you gained from the video and the data that you’ve seen, what do you think is creating the data that kepler gathered? explain your answer
https://youtu.be/gypAjPp6eps
The telescope created the data gathered by Kepler and his team.
What is a star?
A star is a large luminous astronomical body which produces light and heat energy as well as radiation.
There are billions of stars in the universe organized into galaxies.
The Sun is the star of our solar system.
The Kepler project produced a wide range of data products and documentation to assist the community in using data from the mission to help study both exoplanets and other astrophysical areas.
In the video, a mysterious star was observed which is 50 percent bigger and 1,000 degrees hotter than the Sun.
By mean of telescopes, it was observed that the dimming seen in the diet was dues to dust particles.
These data produced ranges from engineering data on the detectors to lists of planet candidates and includes many of the intermediate data products in the data processing path.
The Kepler first mission came to an end after four years when two of the four reaction wheels, used to point the spacecraft malfunctioned.
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8. a car enters a freeway with a speed of 23 km/h and accelerates to a speed of 86 km/h in 3.5 min. how far does the car move while accelerating?
The car moves 50 km while accelerating.
What is acceleration?
In mechanics, speed increase is the pace of progress of the speed of an article regarding time. Speed increases are vector amounts. The direction of an item's speed increase is given by the direction of the net power following up on that article. For instance, when a vehicle begins from a halt (zero speed, in an inertial casing of reference) and goes in an orderly fashion at speeding up, it is advancing toward movement. In the event that the vehicle turns, a speed increase happens toward the new bearing and changes its movement vector. The speed increase of the vehicle in its momentum bearing of movement is known as a straight (or distracting during roundabout movements) speed increase, the response to which the travelers on board insight as a drive pushing them once again into their seats. While taking a different path, the affecting speed increases.
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a woman walks due west on the deck of a ship at 3 mi/h. the ship is moving north at a speed of 18 mi/h. find the speed and direction of the woman relative to the surface of the water.
The velocity of a woman is (3i + 18j) m/s with a magnitude of 18.25 m/s and 80.54⁰ from the west.
We need to know about vectors to solve this problem. Velocity is included in vectors because it has magnitude and also direction. Velocity can be determined as the distance traveled divided by time interval. Velocity can be written as
v = vx i + vy j
the magnitude of velocity can be determined as
|v| = √(vx² + vy²)
the angle of the vector from x-axis is
tanθ = vy / vx
From the question above, we know that
vx = ( 3 i )mi/h
vy = ( 18 j ) mi/h
Hence, the velocity relative to the surface water is
v = vx i + vy j
v = (3i + 18j) m/s
the magnitude is
|v| = √(vx² + vy²)
|v| = √(3² + 18²)
|v| = √333
|v| = 18.25 m/s
the direction is
tanθ = vy / vx
tanθ = 18/3 = 6
θ = 80.54⁰
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A 30.0 -turn solenoid of length 6.00 cm produces a magnetic field of magnitude 2.00 mT at its center. Find the current in the solenoid.
The current in the solenoid is [tex]3.18\times10^{-11}A[/tex].
Solenoids are basically coils of twine. These generate a magnetic subject that strives a pressure over a steel component.A magnet could be a basic period of time for a coil of twine that we have a tendency to use as associate magnet.We to boot ask the tool that might convert power into mechanical power as a magnet.Actually it generates a magnetic subject for developing linear movement from the electrical up-to-date. With employing a magnetic subject.Magnetic field at the centre of a solenoid of length 'L' having 'N' number of turns with a current 'I' is given by [tex]B=\frac{u_0NI}{L}[/tex] ...(1)It is given that 30.0 -turn solenoid of length 6.00 cm = 0.06m produces a magnetic field of magnitude 2.00 mT at its center .
Putting above values in equation (1) , we get
[tex]2.00=\frac{4\pi \times10^{-7}\times30.0I}{0.06} \\\\I=\frac{2.00\times0.06}{4\pi \times10^{-7}\times30.0} \\\\I=3.18\times10^{-11}A[/tex]
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What is the wavelength of the photon needed to excite an electron from e1 to e4?.
The wavelength needed in transition energy is λ = 9.73 x 10¯⁸ m.
We need to know about transition energy to solve this problem. Electrons in a hydrogen atom can move to another level of energy. It is also called a transition. In this process, electrons will absorb or release their energy to move. The transition energy can be determined as
ΔE = E2 - E1
where ΔE is transition energy, E2 is the final state of energy and E1 is the initial state of energy.
The state energy of a hydrogen atom can be calculated by
E = -(13.6) / n² eV
E = h.c / λ
where n is the number of energy states, h is Planck constant (4.136 x 10¯¹⁵ eV/Hz), c is speed of light (3 x 10⁸ m/s) and λ is wavelength.
From the question above, we know that
n2 = 4
n1 = 1
By substituting the following parameter, we get
ΔE = E2 - E1
ΔE = -(13.6) / n2² - (-(13.6) / n1²)
ΔE = -(13.6) / 4² - (-(13.6) / 1²)
ΔE = 13.6 - 0.85
ΔE = 12.75 eV
Calculate the wavelength needed
ΔE = 12.75 eV
h.c / λ = 12.75
4.136 x 10¯¹⁵ . 3 x 10⁸ / λ = 12.75
λ = 9.73 x 10¯⁸ m
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in the trapazoid below, x=?
A polygon with only one set of parallel sides is called a trapezoid. The parallel bases of a trapezoid are another name for these parallel sides. Trapezoids have two additional sides that are not parallel and are referred to as their legs. The value of x is 12.
What is a Trapezoid?A four-sided shape called a trapezoid has one pair of parallel sides. It fundamentally resembles a square, rectangle, or parallelogram in two dimensions. So, like other shapes, this one has a boundary and an area.
There are some Mid-segment characteristics :
Parallel to each boxHalf the sum of length of the basesAlso called the medianNow, according to the diagram, make an equation :
5x-20 = [(2x+6) + (4x+2)] / 2
5x-20 = (6x+8)/2
5x-20 = 3x+4
5x-3x = 20+4
2x = 24
x = 12
Hence, the value of x is 12.
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what is her angular momentum around the center of the merry-go-round with the child and the ball on it
Answer: The total angular momentum of the person-merry go round system is constant
Explanation:
two like charges of the same magnitude are 5.0 mm apart. if the force of repulsion they exert upon each other is 2.0 n, what is the magnitude of each charge? (the constant of proportionality for the coulombic force is 9.0 × 109 n·m2/c2.)
The magnitude of charge of each particle is 5.55 μC
Given that the two like charges are of same magnitude. Let Q be the magnitude of the charges.
Distance between the particles, r = 5 mm = [tex]5\times 10^{-3}[/tex] m
The force of repulsion exerted upon each other by the charges = 2 N
Coulomb's law states that the force of interaction between the charges is directly proportional to the product of the magnitude of charges and is inversely proportional to the square of the distance between the charges.
I.e., [tex]F = \frac{kQ^2}{r^2}[/tex] , k = [tex]9\times 10^9 Nm^2C^{-2}[/tex] is the constant of proportionality for the Coulombic force.
⇒ 2 = [tex]\frac{9\times 10^9\times Q^2}{5^2\times 10^{-6}}[/tex]
Therefore, [tex]Q^2 =\frac{50\times 10^{-6}}{9\times10^9}[/tex]
Therefore, Q = 5.55 x [tex]10^{-15}[/tex] C = 5.55 μC is the magnitude of the charge of each particle.
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A long, vertical, metallic wire carries downward electric current. (ii) What would be the direction of the field if the current consisted of positive charges moving downward instead of electrons moving upward? Choose from the same possibilities as in part (i).
The direction of the conventional current that generates the magnetic field at a specified place determines its direction. The direction of the field if the current consisted of positive charges moving downward instead of electrons moving upward is South.
What is the electric current's direction?In terms of circuit analysis, the direction of electric current from positive to negative is usually considered as well. Positive charges moving in the opposite direction are mathematically similar to negative charges moving in the same way. Therefore, it does not have any effect. When examining a circuit, the flow of current from positive to negative or vice versa can be taken into account. In actuality, negatively charged electrons can attract positively charged ions. Conventionally, a positive charge would flow in the same direction as an electric current. As a result, the battery's positive terminal receives less current in the external circuit than its negative counterpart. Actually, electrons would flow in the reverse direction across the wires.
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put the types of electromagnetic radiation in order of decreasing frequency. view available hint(s)for part a put the types of electromagnetic radiation in order of decreasing frequency. microwave > radio > infrared > ultraviolet radio > microwave > infrared > ultraviolet ultraviolet > infrared > radio > microwave ultraviolet > infrared > microwave > radio
The types of electromagnetic radiation in order of decreasing frequency will be D. ultraviolet > infrared > microwave > radio.
What is electromagnetic radiation?
This is the radiation that travels in waves and possesses both an electric and magnetic field. Both natural and artificial sources contribute to it. The energy levels of electromagnetic radiation can range from low to high. It consists of x-rays, gamma rays, infrared light, visible light, ultraviolet light, radio waves, and microwaves.
When a charged particle, like an electron, changes its velocity—that is, when it is accelerated or decelerated—electromagnetic radiation is created. As a result, the charged particle loses the energy of the electromagnetic radiation that is thus created.
It should be noted that radio has highest wavelength and ultraviolet has lowest wavelength.
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Few meteors make it through the thick air of this planet without disintegrating. True or false?.
Few meteors make it through the thick air of this planet without disintegrating. This statement is false.
Meteors refer to heavily sized metallic objects or rock fragments that are formed as a result of a collision between asteroids.
These rock lumps revolve around the sun and are smaller in size than asteroids.
Their size ranges from grain-sized particles to about 1 meter wide objects
As they enter the atmosphere of earth they crash forming streaks of light and disintegrate into small-sized dust particles and never get through the thick air of the earth.
However, they impact the earth in several ways such as heating the earth's surface.
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A girl rides her bike at 18 m/s for 31 s. How far does she travel in that time
Answer: 558 meters in 31 seconds.
Explanation:
You simply do 18*31 because every single second for thirty one seconds, the girl is going 18 meters.
Therefore, at this rate, she would ride about 558 meters in 31 seconds.
Answer:
558 m
Explanation:
The formula for distance, given speed and time, is D=ST. When you plug the numbers into this, D=(18)(31), and 18 times 31 *puts in calculator* is 558.
The speed is in meters per second, so meters would be your unit.
So, the answer is 558 m.
Hope I helped!!! :)
describe and explain how energy if thermally transferred from the heating element to the food in a conventional oven
Answer:
The thermal transfers via "Conduction and Radiation"
Explanation:
Because, Convection is the transfer of thermal energy by particles moving through a fluid. Thermal energy is always transferred from an area with a higher temperature to an area with a lower temperature.
Moving particles transfers the thermal energy through a fluid by forming convection currents.
It transfers ( thermal ) heat energy to a food's surface via convection and radiation. So that, the heat energy on the food's surface, then it spreads via "conduction" towards the food's center.
How long would it take an airplane to travel 1350m if it started from rest and accelerated at a constant 3.00 m/s^2?
The time taken for the airplane to travel 1350 m from rest is 30 s
Data obtained from the questionThe following data were obtained from the question:
Initial velocity (u) = 0 m/sDistance (s) = 1350 mAcceleration (a) = 3 m/s² Time (t) = ?How to determine the timeThe time taken to travel the distance of 1350 m can be obtained as follow:
s = ut + ½at²
1350 = (0 × t) + (½ × 3 × t²)
1350 = 0 + 1.5t²
1350 = 1.5t²
Divide both sides by 1.5
t² = 1350 / 1.5
t² = 900
Take the square root of both sides
t = √900
t = 30 s
Thus, it will take 30 s for the plane to travel a distance of 1350 m
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a 0.40kg mass is attached to an ideal spring. if it oscillates horizontally with a period of 0.50s and an amplitude of 0.20m, then determine the spring constant of the spring? group of answer choices
By angular speed, the spring constant is 63.21 N/m.
We need to know about the angular speed of harmonic oscillation. the angular speed can be determined as
ω² = k / m
where ω is angular speed, k is spring constant, and m is the mass.
The angular speed can be calculated by
ω = 2π/T
Hence,
ω² = k / m
(2π/T)² = k / m
where T is period.
From the question above, we know that:
m = 0.4 kg
T = 0.5 s
By substituting to the equation, we get
(2π/T)² = k / m
(2π/0.5)² = k / 0.4
158.04 = k / 0.4
k = 63.21 N/m
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Answer:
63 N/m
Explanation:
Khan
The total leaf area a of a leafy plant scales with the total plant's mass m as a∝m3/4. Part a if you replace one large tree with two smaller trees, each with half the mass of the original tree, by what factor do you increase the total leaf area?
The total leaf area is increased by a factor of 1.
What is the total leaf area, a of the tree?The total area of the leafy plant is given by the formula below:
Area, a ∝ m3/4a = k m/34
where m is the mass of the tree
The mass of the two smaller trees are half the masses of the bigger trees.
The total area of each of the smaller leafy plants are given are given as follows:
a ∝ m/2 * 3/4
a ∝ m3/8
a = k * m * 3/8
The total area of the two trees: k * m * 3/8 + k * m * 3/8
a = 2 * k * m * 3/8
a = k * m * 3/8
Therefore, the area is increased by a factor of 1.
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The function =pmt(c5,c7,-c3) is stored in cell c15. What must be stored in cell c5?
When function =pmt(c5,c7,-c3) is stored in cell c15. Cell c5 must contain a Periodic interest rate.
We know that periodic interest rate is the rate that is realized on an investment, or loan over a specific period of time. Basically, the periodic rate is the annual interest rate divided by the number of periods.
In Excel the syntax of Rate Function is RATE(nper, pmt, pv, [fv], [type], [guess]), where pv stands for the loan amount, nper is the period of payment and pmt is the periodic payment.
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don is 10 kilometers ahead of jane, and both are traveling forward. how long will it take jane to catch up with don if jane is traveling at 10 k.p.h and don at 6 k.p.h. ?
The time it takes Jane to catch up with Don if Jane is traveling at 10 k.p.h and don at 6 k.p.h is: 2.5 h
The formula and procedure we will use to solve this problem is:
Tr = x/(v2-v1)
Where:
x = separation distanceTr = reach time v2 = velocity of the faster mobilev1 = velocity of the slowest mobileInformation about the problem:
x = 10 kmv2 = 10 km/hv1 = 6 km/hTr=?Applying the reach time formula we get:
Tr = x/(v2-v1)
Tr = 10 km/(10 km/h- 6 km/h)
Tr = 10 km/(4 km/h)
Tr = 2.5 h
What is velocity?It is a physical quantity that indicates the displacement of a mobile per unit of time, it is expressed in units of distance per time, for example (miles/h, km/h).
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What is astrology considered?
A. A pseudoscience
B. A peer reviewed Science
C. A true science
D. A soft science
Answer:
It might be A!
Explanation:
I'm not entirely sure!
Table of current and potential differences for resistors in series
Answer:
use ohms law for tabling.
Potential (V) = current (I) × R
Let R = 1 ohm.
table:-
V. (voltage difference) current (I)
1. 1 Volt 1A
2. 2 volt 2 A
3. 4 volt 4 A
4. 6 volt 6A
.
.
.
.
Give me an example of a hypothesis in a proper format
Answer: Students who eat breakfast will perform better on a math exam than students who do not eat breakfast.
Explanation:
Hope this helps!
The car covers a distance of 20 km due east in two hours and truck covers 60 km in 3 hours due west. What is their speed and velocity?
Taking into account the definition of speed ans velocity, the speed and velocity of the car are 10 km/h and 10 km/h due east respectively and the speed and velocity of the truck are 20 km/h and 20 km/h due west respectively.
Definition of speedSpeed is a physical quantity that expresses the relationship between the space traveled by an object and the time used for it. That is, the speed is associated with the change of position of an object in space within a certain amount of time.
The speed can be calculated using the expression:
speed= distance traveled÷ time
Definition of velocityVelocity is a physical magnitude that relates the displacement of an object, the time it takes to make this change in position and direction. So it is considered a vector magnitude.
The velocity can be calculated using the expression:
velocity= distance traveled÷ time
Velocity has units of distance/time and includes direction of travel.
Speed and velocity in this caseIn this case, you know:
The car covers a distance of 20 km due east in two hours. Truck covers 60 km in 3 hours due west.The speed and velocity of the car can be calculated:
speed= 20 km÷2 hours= 10 km/hvelocity= 20 km÷2 hours= 10 km/h due east.The speed and velocity of the truck is calculated as:
speed= 60 km÷3 hours= 20 km/hvelocity= 60 km÷3 hours= 20 km/h due west.In summary, the speed and velocity of the car are 10 km/h and 10 km/h due east respectively and the speed and velocity of the truck are 20 km/h and 20 km/h due west respectively.
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