Answer:
C: Every mass exerts a gravitational force on every other mass
This statement is true
The energy emitted from a single photon is 1.68 x 10^-27 Joules. Which of the following is most likely the type of electromagnetic wave that was
emitted?
limiteds edition oon substartion basiss i dont kkown
Astronomers know that dark matter is present in galactic halos because the speeds of orbiting stars _________ far from the center of the galaxy.
Astronomers know that dark matter is present in galactic halos because the speeds of orbiting stars is constant far from the center of the galaxy.
What is the speed of orbiting stars from center of the galaxy?The speed of stars is in the range of 1 kpc to 16 kpc from the galactic centre.
These stars move approximately on circular orbits about the galactic centre along with small peculiar velocities.
For most of the stars, the velocities range between 200 km/s to 250 km/s.
The speed of the stars orbiting stars remains constant far from the center of the galaxy.
Thus, Astronomers know that dark matter is present in galactic halos because the speeds of orbiting stars is constant far from the center of the galaxy.
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Which of the following concussion BEST describes the data Kevin collected?
A. Sound travels slower in the denser medium
B. Sound travels faster in the denser medium
C. Velocity of the sound wave does not change in the different media
D. Velocity of the sound wave does not change in the different media but in the frequency
. A cylinder of mass M and radius R is released from rest at the top of an inclined plane. The cylinder rolls without slipping down the incline. The rotational inertia of the cylinder is MR2/2.
Derive an expression for the angular momentum of the cylinder about its center of mass when it has rolled a vertical distance h. Express your answer in terms of M, R, h, and physical constants, as appropriate.
For a cylinder of mass M and radius R is released from rest at the top of an inclined plane, the expression is mathematically given as
L=MR * √{gh/3}
What is the expression for the angular momentum of the cylinder about its center of mass when it has rolled a vertical distance h.?Generally, the equation for the angular velocity is mathematically given as
w=V/R
Therefore
[tex]w=\frac{\sqrt{ugh/3}}{R}[/tex]
In conclusion, at instance of IW, the angular velocity
[tex]L=MR^2/2 * 2\sqrt{gh/3}/R[/tex]
L=MR * √{gh/3}
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A box with a total surface area of 1.2 m2 and a wall thickness of 4 cm is made of an insulating material. A 10 W electric heater inside the box maintains the inside temperature at 15 oC above the outside temperature. What is the thermal conductivity of the insulating material in units of kcal/(s oC m)
For a box with a total surface area of 1.2 m2, the thermal conductivity of the insulating material is mathematically given as
k=5.29*19^{-6} kcal/(s oC m)
What is the thermal conductivity of the insulating material?Generally, the equation for the is mathematically given as
P=Ka dT/L
Therefore
k=10*4*10^{-2}/1.2*1.5
k=5.29*19^{-6} kcal/(s oC m)
In conclusion, the thermal conductivity
k=5.29*19^{-6} kcal/(s oC m)
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The fundamental measuring unit of Electromagnetism is?
Ampere (electric current)
Volt (electric potential)
Coulomb (electric charge)
The fundamental measuring unit of electromagnetism is Ampere (electric current.Option 1 is correct.
What is electromegnetism ?The physical interplay of electric charges, magnetic moments, and the electromagnetic field is known as electromagnetism.
The electromagnetic field can be static, moving slowly, or forming waves. Electromagnetic waves are commonly referred to as light and are subject to optics laws.
The fundamental measuring unit of electromagnetism is Ampere (electric current.Option 1 is correct.
Hence option 1 is correct.
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In the first direct detection of gravitational waves by LIGO in 2015, the waves came from A. the collapse of a nearby star into a white dwarf B. the merger of two black holes C. a supernova explosion in a nearby galaxy D. the rapid motion of three hot Jupiter planets around a
In the first direct detection of gravitational waves by LIGO in 2015, the waves came from the merger of two black holes. Option B is correct. This is further explained below.
What are gravitational waves?A gravitational wave is simply defined as a ripple in space that is unseen though extremely rapid. Gravitational waves move at light speed. As they pass past, these waves compress and stretch everything in their path.
In conclusion, the merger of two black holes is the first direct detection of gravitational waves.
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Which is an example of a negative acceleration? A snowboarder who increases speed when traveling downhill, a biker who maintains a constant speed through a race
Answer:
a snowboarder who increaseds speed when traveling downhill
Explanation:
if i have 5.6 liters of gas in a piston at a pressure of 1.5 pa and compress the gas until it’s volume is 4.8 L what will the new pressure inside the piston be?
Why do perpendicular forces do No work?
Answer:
The definition of work is:
Force (dot product) distance = work
The dot product of vectors at right angles is zero - so no work can be done if the applied force is at a right angles to direction of motion
Suppose a star has the same apparent brightness as Alpha Centauri A ( 2.7×10−8watt/m2 ) but is located at a distance of 300 light-years. What is its luminosity?
For a star that has the same apparent brightness as Alpha Centauri A ( 2.7×10−8watt/m2 is mathematically given as
L=2.7*10^30w
What is its luminosity?Generally, the equation for the luminosity is mathematically given as
L=4*\pi^2*b
Therefore
L=4*\pi^2*b
L=4* \pi *(2.83*10^{18})*2.7*10^{-8}
L=2.7*10^30
In conclusion, the luminosity
L=2.7*10^30w
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A lightning bolt transfers 6.0 coulombs of charge from a cloud to the ground. In 2.0*10^-3 second. What is the average current during this event.
Answer:
sup cuh, i just want the point lol
Explanation: sorry not sorry reases
What must be the acceleration of a box that is pushed with 86 N of force and experiences 29 N of friction? The mass of the box is 5 kg.
Answer:
In mechanics, acceleration is the rate of change of the velocity of an object with respect to time. Accelerations are vector quantities (in that they have magnitude and direction). The orientation of an object's acceleration is given by the orientation of the net force acting on that object. The magnitude of an object's acceleration, as described by Newton's Second Law, is the combined effect of two causes: the net balance of all external forces acting onto that object — magnitude is directly proportional to this net resulting force; that object's mass, depending on the materials out of which it is made — magnitude is inversely proportional to the object's mass.
Explanation:
Cognitive psychology deals with ____.
a: neutral transmissions
b: behavior influence
c: thoughts
Answer:
B
Explanation:
Because the main focus of cognitive psychology is on the metal processes that affect behavior
Laptop computers are made with batteries, but they must also be plugged into outlets to charge the batteries. which is true regarding laptops? they run only on alternating current. they run only on direct current. they can run on either direct or alternating current. they do not run on direct or alternating current.
The true statemement regarding laptops is they can run on either direct or alternating current.
What is direct current source?This is the type of current that flows only in one direction. The source of this type of current in battery.
What is alternate current source?This is the type of current that changes direction with time. The source of this type of current is current from outlet.
Thus, the true statemement regarding laptops is they can run on either direct or alternating current.
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Answer:
C
Explanation:
edge 2022
What is the formula for principle of moments ?
Answer:
The Principle of Moments states that when a body is balanced, the total clockwise moment about a point equals the total anticlockwise moment about the same point. Moment =force F x perpendicular distance from the pivot d.
an object is placed 20cm from a converging lens. If the real image is formed 80cm from the object, what is the focal length of the lens?
Explanation:
Here,
object distance(u)=20cm
image distance(v)=80cm-20cm=60cm
focal length(f)=?
we know ,
(1/f)=(1/v)+(1/u)
1/f = 1/60 + 1/20
1/f = (1+3)/60
60 =4f
f=15cm
how to make a brainliest questions Or how to Get them?
Answer:
Select the crown at the bottom of an answer where the speech bubble icon is.
How many galaxies similar in size to the milky way would you expect to find, on average, in cubes of that same size? in order to simplify the problem, assume that the total number of galaxies of each type has not changed between then and now.
We would discover 64 galaxies the size of the Milky Way in a cube that now holds one galaxy the size of the Milky Way.
What is a galaxy?A galaxy is a massive clump of gas, dust, and billions of stars and their solar systems bound together by gravity.
The first galaxies were discovered in the 17th century by Charles Messier, who had no idea what they were at the time.
Messier, a proficient comet viewer, noticed many more fuzzy objects in the sky that he knew were not comets.
We would discover 64 galaxies the size of the Milky Way in a cube that now holds one galaxy the size of the Milky Way.
Hence there are 64 galaxies similar in size to the milky way.
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The frequency of phenotypes for a typical polygenic trait is most often illustrated as.
Answer:
a bell-shaped curve.
Explanation:
Who discovered the surface of venus was noxious and hot?.
The discovery that the surface of Venus is noxious and hot can be attributed to several space missions and scientific observations. However, the first confirmation of Venus's harsh conditions came from the Soviet Venera 4 mission in 1967.
Venera 4, an unmanned spacecraft, successfully descended through Venus's atmosphere and transmitted data back to Earth. The mission's instruments indicated extreme temperatures, atmospheric pressure, and the presence of noxious gases, including sulfuric acid clouds.
This groundbreaking mission provided the initial evidence that Venus has a hostile environment with a thick, toxic atmosphere and intense heat.
Therefore, it was the Soviet Venera 4 mission that played a pivotal role in confirming the noxious and hot nature of Venus's surface.
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2. An electric motor transfers 2003 in 10.0 s. If it then transfers the same amount of energy in 8.0 s, has its
power increased or decreased?
Answer:
decreased
Explanation:
because it transfered from 10.0s
to 8.0s
An electric generator converts kinetic energy into which kind of energy? stored mechanical potential electrical
Answer:
The generator, in turn, converts the mechanical (kinetic) energy of the rotor to electrical energy. Different types of turbines include steam turbines, combustion (gas) turbines, hydroelectric turbines, and wind turbines.
Answer:
electrical energy ;))
Explanation:
Research indicates that social isolation tends to decrease aggressive behaviors. please select the best answer from the choices provided t f
The statement "Research indicates that social isolation tends to decrease aggressive behaviors." is a False statement. This is further explained below.
What is social isolation?Generally, social isolation is simply defined as a lack of social relationships Some humans experience loneliness as a result of social isolation.
In conclusion, Social isolation does not to decrease aggressive behaviors or acts of violence.
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Answer:
false
Explanation:
004 (part 1 of 3) 10.0 points
Two moles of helium gas initially at 410 K
and 0.47 atm are compressed isothermally to
1.34 atm.
Find the final volume of the gas. Assume
that helium behaves as an ideal gas. The
universal gas constant is 8.31451 J/K · mol.
005 (part 2 of 3) 10.0 points
Find the work done by the gas.
Answer in units of kJ.
006 (part 3 of 3) 10.0 points
Find the thermal energy transferred.
Answer in units of kJ.
The final volume of the gas, work done, and the thermal energy transferred is mathematically given as
vf=0,0623m^2
W=-4.03KJ
Q=-4.03KJ
What are the final volume of the gas, work done, and the thermal energy transferred?
Generally, the equation for the ideal gas is mathematically given as
Pv=nRT
Therefore
vf=nRT/P
vf=2*8.314330/1*1.01*10^3
vf=0,0623m^2
In conclusion
vi=nRT/Pi
vi=0.1175m^3
w=pdv
w=2*8.314*330in()0.0623/0.117
W=-4.03KJ
Where
Q=W
Q=-4.03KJ
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Hi, Can anyone help me? I don't understand.
A car horn has a frequency of 448 Hz when the car is stationary. If the car approaches a stationary recorder at a speed of 19.0 m/s, what frequency does the device record if the temperature is 20°C? What frequency does the device record after the car passes by?
**SHOW CALCULATIONS, PLEASE!
The frequency recorded by the device after the car passes by at the given speed is 474.27 Hz.
Observed frequency recorded by the deviceThe frequency recorded by the device is determined by using the following formula for doppler effect.
[tex]f_o = f_s(\frac{v + v_0}{v- v_s} )[/tex]
where;
v is speed of sound at 20°C = 343 m/s[tex]f_o = 448(\frac{343 + 0}{343-19} )\\\\f_0 = 474.27 \ Hz[/tex]
Thus, the frequency recorded by the device after the car passes by at the given speed is 474.27 Hz.
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A group constructed two pendulums of different masses and measured their periods multiple times. Their analysis indicated their two samples were distinguishable. What can you infer from these findings
What I can infer from these findings is that
The period of a pendulum is equal to 2pi'sqrt(e) The period of a pendulum is proportional to its length.This is further explained below
What are pendulums?Generally, A pendulum is simply defined as a body that is held from a point and swings under the effect of gravity.
In conclusion, The length of the pendulum varies, but the time period remains constant due to gravity's acceleration at different locations on Earth.
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CQ
A group constructed two pendulums of different lengths and measured their periods multiple times. Their analysis indicated their two samples were indistinguishable. What can you infer from these findings? The two lengths might have been too similar The period of a pendulum is equal to 2pi'sqrt(e) The period of a pendulum is proportional to its length. The two lengths might have been too different.
If a star has a large luminosity and also a low surface temperature then it must have:.
Answer:
To summarize, the answer is it has a small radius.
Explanation:
This is becuase these characteristics interpert a small radius.
A person is attracted towards the center of Earth by a 440 N gravitational force. The force with which Earth is attracted toward the person is _____.
A person is attracted towards the center of Earth by a 440 N gravitational force. The force with which Earth is attracted toward the person is 440 N.
Reason: If you were to consider Newton's third law, it says for every action, there is an equal and opposite reaction. That means if the earth exerts a 440N force on the human, then the human will exert a 440N force on the planet.
p.s. Newton's three laws would be very helpful to know for these sorts of conceptual questions that involve forces
Which of the statements is true regarding the physical properties of hydrocarbons?
1.All hydrocarbons are liquids.
2.All hydrocarbons are gases.
3.Smaller hydrocarbons have higher boiling points and melting points.
4.Larger hydrocarbons have higher boiling points and melting points.
Answer:
4 is correct
Explanation:
The more carbons in a hydrocarbon there are the higher the melting point will become.