Answer:
D Closer to moon than earth because earth has a greater mass than the moon
Explanation:
As we know that gravitational force is given by
[tex]F = \frac{Gm_1m_2}{r^2}[/tex]
so here if the net gravitational force at some distance between moon and earth is zero or equal due to moon and earth then in that case
[tex]F_{moon} = F_{earth}[/tex]
so here we can say
[tex]\frac{GM_m m}{r_1^2} = \frac{GM_e m}{r_2^2}[/tex]
so here we will have
[tex]\frac{M_m}{M_e} = \frac{r_1^2}{r_2^2}[/tex]
since mass of earth is more than mass of moon so we can say
[tex]\frac{r_1}{r_2} < 1[/tex]
so here we have
[tex]r_1 < r_2[/tex]
so the position is closer to moon because moon is of smaller mass than earth
Final answer:
In a spacecraft launched from Earth toward the moon, the spacecraft will be closer to the moon than to Earth when the gravitational forces acting on it are equal.
Explanation:
In a spacecraft launched from Earth toward the moon, the spacecraft will be closer to the moon than to Earth when the gravitational forces acting on it are equal.
The gravitational force between two objects depends on their masses and the distance between them. Although the moon has smaller mass compared to Earth, it is much closer to the spacecraft when it reaches that point where the gravitational forces are equal. This is because the spacecraft has traveled a greater distance away from Earth.
So, the correct answer is option B, closer to the moon because the moon has greater mass than the earth.
Which is a tool used by scientists to determine the composition of objects?
A. a hologram
B. a spectrometer
C. a wave front
D. a prism
Answer:
Its B
Explanation:
edg2020
Spectrometer is the tool used by scientists to determine the composition of objects. So, option B is correct.
What is meant by spectroscopy ?Spectroscopy is defined as the technique of studying the structure and properties of matter by using radiations.
Here,
The method of spectroscopy is that it analyses matter by using radiations. In this process, the radiations emitted and absorbed by the particles are analyzed. The instrument used is called spectrometer. Thus the absorption spectra and emission spectra of the particle are obtained. From this, the interaction of the particle with the materials in form of energy can be studied. Spectroscopy can be called as the measurement of the matter-energy interactions by means of radiation and their wavelengths as the function of energy. Spectroscopy and its applications have been widely used in many of the theories in physics. Quantum mechanics and relativity theories and many others has been developing their theories by the major applications of spectroscopy. Study of material particles are widely done by spectroscopy
Hence,
Spectrometer is the tool used by scientists to determine the composition of objects.
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How does a star’s life begin?
THE LIFE OF A STAR
The star starts as a NEBULA basically like this really pretty universal gas. The gas then starts to attract to each other and sticks around together. In the universe the temperature may vary. When the temperatures are extremely high there is a REACTION aka FUSION that takes place.
Then THERE IS A STARR
You travel in a circle, whose circumference is 8 kilometers, at an average speed of 8 kilometers/hour. If you stop at the same point you started from, what is your average velocity? A. 0 kilometers/hour B. 2 kilometers/hour C. 4 kilometers/hour D. 8 kilometers/hour E. 16 kilometers/hour
Velocity = (displacement) / (time)
Displacement = straight-line distance between start-point and end-point
If you stop at the same point you started from, then your displacement for the trip is zero.
The answer is A
Velocity = (displacement) / (time)
Displacement = straight-line distance between start-point and end-point
If you stop at the same point you started from, then
your displacement for the trip is zero, and your average
velocity is also zero.
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Light travels at a constant speed of about 300,000 km/s. This speed is referred to as the speed of light. A light year is the distance that light travels in one year. One light year is equal to 9.46 trillion kilometers. The closest star to Earth, other than the Sun, is Proxima Centauri. It takes light from this star about 4.2 years to reach Earth. How far from Earth is the star Proxima Centauri? A. 4.2 light years B. 9.46 trillion km C. 300,000 light years D. 300,000 km.
Based on the information in the question, a light year is the distance traveled light in one year. Then if the light from the star Centauri takes 4.2 years to reach the earth, then its distance from earth is 4.2 light years.
Answer:
The correct choice is
A. 4.2 light years
Explanation:
v = speed of light = 300,000 km/s
t = time taken for the light to travel from Proxima centauri to earth = 4.2 years
d = distance traveled by light in 1 year = 1 light year
So
distance in 1 year = 1 light year
distance in 4.2 year = 4.2 light year
Hence
distance of star Proxima Centauri from earth = 4.2 light year
otassium hydroxide (KOH) and hydrochloric acid (HCl) react in a beaker. They form potassium chloride (KCl) and water (H2O). What type of reaction is this?
synthesis reaction
double replacement reaction
single replacement reaction
decomposition reaction
Answer
Hello,
This is a double replacement reaction.
Explanation
A double replacement reaction occurs wherein the two principle reactants exchange after reaction. In this example, Cl will combine to K to form KCl and H will add to OH to form H2O.The cations and anions switch between the reactants to produce new products.
Wish you Luck!
Which planet in the list below is larger than Earth? A. Saturn B. Mars C. Mercury D. Venus
ANSWER:
the planet that is larger than earth is Saturn
~batman wife dun dun dun...aka ~serenitybella
it would be Saturn
The equatorial diameter of Saturn is 120,536 km; that's about 9.5 times bigger than the diameter of the Earth. The surface area of Saturn is 83 times the area of Earth, and the volume is 764 times the volume of Earth. In other words, you could fit 764 planets the size of Earth inside Saturn.
An electric current produces a magnetic field because of ______.
A.) Magnetism
B.) The Moving Protons
C.) Magnetic field
D.) Induction
An electric current produces a magnetic field because of the motion of charged particles. While the original question suggests moving protons, it is actually the movement of electrons in the current that generates the magnetic field. This process is closely related to the principle of induction, where changing magnetic fields induce electric currents in conductors.
Explanation:An electric current produces a magnetic field due to the magnetic field from the moving charges in the current. When electric charges are in motion, such as when electrons flow through a conductor, they generate a magnetic field around them. This is a fundamental principle of electromagnetism, informed by Oersted's discovery and formalized by the works of Faraday and Henry. The key underlying concept relating to the production of magnetic fields by electric currents is the motion of charged particles, which in most cases are electrons.
To address the original question: An electric current produces a magnetic field because of B.) The Moving Protons. However, this is a misleading choice as it is actually the electrons that move in a conductor, not protons. A more accurate statement would be the movement of charged particles—typically electrons in circuits—produces a magnetic field.
One can induce a magnetic field through the interaction of magnets with conductors, a process known as induction. For example, moving a bar magnet through a wire loop (as stated in the provided information), known as motional emf, will induce an electric current in the wire loop due to the changing magnetic flux.
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A ball is thrown horizontally at a height of 2.2 meters at a velocity of 65m/s off a cliff. Assume no air resistance. How long until the ball reaches the ground?
The horizontal motion has no effect on the vertical drop.
From a drop, the distance the ball falls in 'T' seconds is
D = 4.9 T^2
so
2.2 = 4.9 T^2
T^2 = 2.2/4.9
T^2 = 0.449 sec^2
T = 0.67 second
We have that A ball is thrown horizontally at a height of 2.2 meters at a velocity of 65m/s off a cliff. Assuming no air resistance will take t to reach the ground
t=0.670sec
From the question we are told that
A ball is thrown horizontally at a height of 2.2 meters
a velocity of 65m/s off a cliff
Generally the equation for the Time is mathematically given as
s=ut+1/2gt^2
Therefore
[tex]2.2=0t+1/2(9.8)t^2\\\\t=\sqrt{\frac{2.2}{0.5*9.8}}\\\\t=0.670sec[/tex]
Therefore
A ball is thrown horizontally at a height of 2.2 meters at a velocity of 65m/s off a cliff. Assuming no air resistance will take t to reach the ground
t=0.670sec
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Sound waves are converted finally into which of these signals in order to be processed by the brain?
A.
Electrical signal waves
B.
pressure waves
C.
longitudinal waves
D.
high-frequency transverse waves
E.
low-frequency transverse waves
Sound waves are longitudinal wave which propagates in form of compression and rarefaction through the medium
As the medium is have compression and rarefaction then we will have few positions in the medium where we have pressure maximum and few points of less pressure.
this pressure difference creates disturbance into our ear drum and this disturbance or this signal is convey to brain as sound.
The transmission of this signal is always in form of electrical signal which are carried by neurons into our brain
So the sound waves are converted finally into electrical signals in order to be processed by the brain.Read more onAnswer:
A. Electrical signal waves
Explanation:
If you get married in 2019, and then in the future 28 years have past what would your age be. Also when you get married in 2019 the age is 18
the answer is 46 because the year is 2047 and you was eighteen in 2019 so you was born in 2001
To calculate the age after 28 years from getting married at age 18 in 2019, you add 28 to 18, resulting in an age of 46 years.
If someone gets married at the age of 18 in the year 2019, to calculate their age after 28 years have passed, you simply add 28 to their age at marriage. Here's the step-by-step calculation:
Age at marriage: 18 yearsYears passed: 28 yearsNew age = Age at marriage + Years passedNew age = 18 years + 28 yearsNew age = 46 yearsTherefore, after 28 years have passed since getting married in 2019, the person would be 46 years old.
The windowpanes are___________ a. opaque b. transparent c. absorbent .
The colors of the panes are due to the wavelengths of light that the glass_________ a. absorbs b. allows to pass through c. reflects.
Answer:
The windowpanes are- transparent.
The color of the panes are due to the wavelengths of light that the glass- allows to pass through
Explanation:
Just answered the question.
Answer:
The two answers are:
Explanation:
1) transparent
2) allows to pass through
I also just did this question. No lie. I hope this helps!
- sincerelynini
What factor might be contributing to climate change
Final answer:
Climate change is primarily driven by the emission of greenhouse gases like carbon dioxide and methane, mainly from the burning of fossil fuels, deforestation, agriculture, and manufacturing. Human-caused factors are the most significant contributors to the current rates of global warming, surpassing natural influences on the climate.
Explanation:
One significant factor contributing to climate change is the emission of greenhouse gases such as carbon dioxide (CO2) and methane. The largest driver of warming comes from burning fossil fuels like coal, oil, and natural gas, which is the main source of CO2 emissions. This is further compounded by deforestation, agriculture, and manufacturing. Other manmade causes include increases in near-surface ozone from internal combustion engines, and aerosols such as carbon black and dust, which impact the Earth's albedo and its ability to reflect solar radiation.
It is essential to distinguish between natural factors that have historically influenced climate, such as changes in Earth's orbital patterns, plate tectonics, solar output, and volcanic activity, versus the anthropogenic (human-caused) factors driving the current unprecedented rates of climate change. Human-related factors far outweigh natural influences, which cannot fully explain the rapid increase in global temperatures observed today. The use of fossil fuels for energy and transportation is identified as the critical factor in fueling the current trend of climate change, contributing directly to the greenhouse effect.
Efforts to reduce emissions, transition to renewable energy sources, and implement more sustainable practices are vital steps in addressing the ongoing climate crisis. This reflects a dire need for coordinated global action to mitigate the impacts on food supply, water resources, ecosystems, and human health.
What is the temperature of a gas in which the atoms are moving very, very slowly? Question 9 options: cold hot room temperature
The temperature of the gas will be cold, because the atoms move very slow,
Answer:
cold
Explanation:
According to kinetic theory of gases, gases at same temperature have same kinetic energy. The speed (v) of the particles of the gas is directly proportional to the temperature (T) of the gas.
K.E. ∝ T
v ∝ T
In the given situation, the atoms of gas are moving very slowly. This means that the temperature of the gas must be very low. The temperature of the gas would be cold.
If there is a North and South Pole on a magnet why don’t north and north meat or south and south
Because like poles repel and unlike poles attract. This is a property of every magnet.
Final answer:
Magnets have both north and south poles, which cannot be separated; like poles repel each other, preventing north poles or south poles from meeting. Cutting a magnet results in new pairs of poles, as they always occur in pairs.
Explanation:
Every magnet has two types of poles, a north pole and a south pole. These poles always come in pairs and cannot be separated; they exhibit a fundamental property of magnets. The reason a north pole does not meet another north pole, or a south pole another south pole, is due to the magnetic fields that they generate. Like poles will always repel each other, which means the north pole of one magnet will repel the north pole of another magnet, and the same goes for two south poles.
When a magnet is cut, even into very small fragments, each piece will retain a north and a south pole. It is impossible to isolate a north pole or a south pole on its own, which is a basic principle of magnetism. Therefore, regardless of how much you divide a magnet, you will never end up with a single pole; new pairs of poles will emerge in each fragment. This inherent characteristic is verified by experiments and is even observable on the atomic level with elements that exhibit magnetic properties, such as iron.
Neglecting losses in a transformer, it's input and output ______ are equal.
A.) Current
B.) Voltage
C.) Power
D.) Turns of wire
Neglecting losses in a transformer, it's input and output power are equal. (C)
The input power in the transformer are equal to the output power of a transformer.
Answer : Option C
Explanation:
The transformers have power on either side as input or output to be constant. This is so because the transformers are the electrical device which transfer the energy between the circuits. There are two types of transformers, step up transformers and step down transformers.
Both follows the following expression of power = voltage x current. According to the type of transformer, the turns of wire and voltage and current are kept varying but the power remains constant.
During which month will Europe and Africa each have equal amounts of sunlight?
The answer is March because they are have an equal amount of sunlight in the vernal equinox which is during the month March.
Answer: March and September
Explanation: Equinox is a term that is related to the position of the Earth in relation to the Sun, and this is a short period of time when the plane of the equator passes through the center of the Sun. This happens twice a year and there are spring and autumn equinoxes, more specifically around March 20 and September 23, and then, thanks to the position of the Earth's equator in relation to the center of the Sun, the amount of sunlight is the same in Africa and Europe. So in March and in September.
Help...??
Which describes the behavior of light when traveling from a medium through which it travels more slowly, such as water to a medium through which it travels faster , such as air?
a. light travels perpendicular to the normal.
b. light bends away from the normal.
c. light bends towards the normal.
d. light travels in a straight line.
"If a ray of light passes across the boundary from a material in which it travels slowly into a material in which travels faster, then the light ray will bend away from the normal line."
I hope this helps, it bends away from the normal
The average kinetic energy of the particles in an object is directly proportional to its A) heat. B) volume. C) temperature. D) potential energy.
the average kinetic energy of the particles in an object is directly proportional to its TEMPERATURE.
Answer: B
Explanation: the answer is b
rank the work done on the charged particles from highest to lowest
Answer:
correct order of work done is given as
2 > 3 > 4 > 1
Explanation:
When positive charge is dragged opposite to electric field then in that case work done is positive while if negative charge is dragged opposite to electric field then the work done is negative
So here we will have
positive work for charge 2, 3 and 4 while for negative charge particle 1 the work done is negative
now here we also know that work done is product of force and displacement
so here work depends on displacement of charge particle
maximum displacement is force particle 2
minimum is for particle 4
so correct order of work done is given as
2 > 3 > 4 > 1
Answer:
2, 3, 4, 1
Explanation:
on edg
When making observations, you should provide a general description of the subject, rather than going into too much detail. Please select the best answer from the choices provided T F
Answer: False
Explanation:
Observation is a detailed record of the data obtain after the implementation of the scientific procedure. It does not include the description of the subject as it is already mentioned in the literature review or writing theory or principle of the scientific research or experiment.
How does a magnet affect another magnet, something made of iron or a similar metal, and moving charges?
It exerts an electric force.
It exerts a magnetic force.
It exerts a polar force.
It exerts a force proportional to the magnet’s charge.
How does a magnet affect another magnet, something made of iron or a similar metal, and moving charges?
It exerts a magnetic force.
~Hope this answers your question!~
Answer: The correct answer is "it exerts a magnetic force".
Explanation:
Magnet: It has magnetic properties. It has two poles: south pole and north pole.
Magnets attract the iron or other metal. It is due to the influence of their magnetic field. The atoms of the iron gets align their electrons. In this way, the iron gets magnetized.
There is a magnetic force of attraction between the opposite poles. There is a magnetic force of repulsion between the same poles.
The current carrying conductor produces the magnetic field around it.
If the compass needle is placed near the current carrying conductor then it will show the deflection. It shows the presence of the magnetic field around the current carrying conductor. It exerts a magnetic force.
Therefore, the option "It exerts a magnetic force" is a correct.
what is the proper equation to use for finding the net force in the y direction
The direction of the acceleration is the same as the direction of the net force: 34 degrees. Apply the equation <eq04017> to find the magnitude of the net force, giving you 35.4 N. Use the magnitude of the force and the mass to find the magnitude of the acceleration: a = F/m = (35.4 N)/(0.10 kg) = 354 m/s2.
Answer: it’s Fnety =(FT)(Sin 32°)- Fg
Explanation:
I guessed it right
Why higher voltage means thinner cables and why it is then cheaper?
The higher the voltage, the lower the current. ... The lower current that accompanies high voltage transmission reduces resistance in the conductors as electricity flows along the cables. This means that thin, light-weight wires can be used in long-distance transmission.
Although the acceleration due to gravity is the same on all objects, why do a flower petal
and a hammer that are falling towards the Earth hit the ground at different speeds and
times. (I need a really good explanation)
We know that acceleration due to gravity is the same for all objects. But if we drop a flower petal and a hammer from the same height, the hammer falls faster. Why does this happen?
Let me try to explain. The petal falls slower as the resistance it faces by air slows it down much more. Even though the hammer is also affected by this resistance, the speed decrease is negligible due to its weight.
To simplify, a petal is much lighter than a hammer. Even though gravity accelerates them at the same speeds, the petal slows down due to air resistance but the hammer doesn't, as its weight counteracts the air resistance.
I may be confusing at times, so please ask me if you want anything clarified :)
Hope this helps you!
Need help with question 4 for physics
do c or A I personally would do c
The diagram shows a spectrometer being used to analyze a sample of a solution.
Which letter represents the diffraction grating?
A. W
B. X
C. Y
D. Z
Answer
B. X
A plate of glass or metal ruled with very close parallel lines, producing a spectrum by diffraction and interference of light.
diffraction grating is an optical component that splits and diffracts light into several beams travelling in different directions. The light emerges with its colours separated.
Answer:
X
Explanation:
I just answered this question on my quiz
Which of these statements about mixtures is true A.mixtures are made up of elements bonded together B.Elements and compounds are types of mixtures C.Pure substances are made up of mixtures combined in specific ratios D.mixtures are classified based on the distribution of particles in them
The true statement is that mixtures are classified based on the distribution of particles in them. Mixtures are a combination of two or more pure substances that retain their individual properties. Elements and compounds, often components of a mixture, are not inherently mixtures themselves.
Explanation:Among the statements given about mixtures, the true one is statement D: mixtures are classified based on the distribution of particles in them. Mixtures are a combination of two or more pure substances in which each substance keeps its own properties. They are not chemically combined. Elements and compounds can often form part of a mixture but are not, in themselves, mixtures. Elements, compounds, and mixtures each have different classifications and properties in the field of chemistry.
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The nucleus of an atom emits a particle. The particle is equal in size to a helium nucleus. What is this particle? A) an alpha particle
B) a beta particle
C) a Newton
D) a gamma ray
Answer:
A) Alpha particle
Explanation:
An alpha particle is identical to a helium nucleus, since consists of 2 protons and 2 neutrons.
The charge of an alpha particle is +2e and its mass is 4 a.m.u.
Alpha particles are produced in alpha decays. Alpha decays occur when a nucleus emits an alpha particle: as a result, the atomic number of the nucleus decreases by 2 units, while its mass number decays by 4 units.
The equation that represents an alpha decay is
[tex]_Z^AX \rightarrow _{Z-2}^{A-4}Y+_2^4 \alpha[/tex]
The efficiency of a device such as a lamp can be calculated using this equation:
efficiency = (useful energy transferred ÷ energy supplied) × 100
Using the formula, calculate the efficiency of the lamp shown in the diagram above.
A) 7%
B) 25%
C) 70%
D) 75%
Answer: C- 70%
Explanation:
Useful energy = 250J-75J = 175J
175J/250J*100= 70%
Efficiency should always be less than 1 or below 100% because every device wastes some energy. You committed a calculating error if you receive a result that is more than 1 or 100% Thus option C is correct.
What efficiency of a device as a lamp can be calculated?Efficiency refers to how effectively a technology converts energy input into usable energy output. The percentage of energy delivered in beneficial ways determines a device's efficiency. Either a decimal or a percentage can be used to represent the efficiency.
Any efficiency can be determined by dividing the energy input by the energy output by 100%. This equation serves as a general representation of energy in the form of heat or power.
Therefore, Useful energy = 250J-75J = 175J 175J/250J×100= 70%
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A 111.6 g sample of iron was heated from 0°C to 20°C. It absorbed 1004 J of energy. What is the specific heat capacity of iron?
Formula
H = m*c*ΔT
Givens
H = 1004 J
m = 111.6
ΔT = 20 - 0
ΔT = 20
c = ?
Solution
1004 = 111.6 * c * 20 Multiply the right.
1004 = 2232*c Divide to get c
1004/2232 = c Do the division
0.4498 = c
Specific heat of iron = 0.4498