The theory is A. continental drift.
Explanation:The lithosphere which is the outermost layer of the planet is broken into pieces called tectonic plates. In this scientific theory called plate tectonics, seven large and greater number of small plates are broken and moved separately. This theory is based on the concept of continental drift.
In the geologic time, continents shift their position from the earth's surface. Similar fossils found on different continent's shores prove us that the continental drift is nothing but truth.
Ground-based radio telescopes can collect data from distant objects in space
A.
during the night only and in clear weather only.
B.
during the day or night and in any weather conditions.
C.
during the day or night and in clear weather only.
D.
during the night only and in any weather conditions.
Final answer:
Ground-based radio telescopes can collect data during both day and night and in all weather conditions (B). They are not affected by daylight or clouds as their observations are based on radio waves which can penetrate atmospheric barriers.
Explanation:
The correct answer to the student's question about when ground-based radio telescopes can collect data from distant objects in space is B. during the day or night and in any weather conditions. Unlike optical telescopes, radio telescopes are not limited by the presence of sunlight or the visibility conditions provided by the Earth's atmosphere. Radio waves can penetrate clouds, and because the Sun is not particularly bright at many radio wavelengths, radio telescopes can operate effectively during both daytime and nighttime. This capability greatly enhances the flexibility of radio astronomy compared to traditional optical astronomy, which can be susceptible to factors such as light pollution and weather conditions.
In contrast to optical observations that often require dry, dark skies and suffer from issues such as light scattering and 'bad seeing' due to atmospheric turbulence, radio telescopes can obtain high-resolution data with technologies like interferometers and very long baseline interferometry. For instance, the Very Long Array (VLA) and the Atacama Large Millimeter/submillimeter Array (ALMA) show the potential of these instruments in capturing precise cosmic phenomena. Moreover, radio astronomy has pushed the boundaries for ground-based observations, with advancements such as radar astronomy that involves both transmitting and receiving signals, enabling studies of celestial bodies within our solar system.
Final answer:
Ground-based radio telescopes can collect data during both the day and night and are not significantly affected by weather conditions. The correct answer is option (B).
Explanation:
Ground-based radio telescopes can collect data from distant objects in space during the day or night and in any weather conditions. Unlike optical telescopes that are impacted by weather and light conditions, radio telescopes are less affected because they collect and focus radio waves.
Weather conditions, such as clouds, or the presence of sunlight do not significantly hinder the operation of radio telescopes, making option B the correct answer: during the day or night and in any weather conditions.
Between any object and surface, the coefficient of static friction is _____ the coefficient of kinetic friction.
equal to
less than
greater than
Answer
Greater than.
Static friction is the force that opposes motion between two objects that are not in motion. For the object to move one have to overcome the static friction. This force is usually greater than the force that exist between two surfaces that are in relative motion. This force is called kinetic friction.
For this reason the coefficient of static friction is greater that coefficient of kinetic friction.
A force of 15 newtons is applied to both Obect A with a mass of 25 kilograms and Object B with a mass of 50 kilograms. What is true about the acceleration of Object A and Object B?
The answer is: The acceleration of the object B is half of the object A.
Why?We can solve this problem applying the Newton's Second Law, which states that the product of the mass and the acceleration of a body is equal to the force applied to that body.
[tex]F=ma[/tex]
So,
For the object A, we have:
[tex]F=15N\\m=25Kg[/tex]
Calculating the acceleration we have:
[tex]a=\frac{F}{m}=\frac{15\frac{kg.m}{s^{2}}}{25Kg}=0.6\frac{m}{s^{2} }[/tex][/tex]
For the object B, we have:
[tex]F=15N\\m=50Kg[/tex]
Calculating the acceleration we have:
[tex]a=\frac{F}{m}=\frac{15\frac{kg.m}{s^{2}}}{50Kg}=0.3\frac{m}{s^{2} }[/tex][/tex]
Hence,
[tex]ObjectA=0.6\frac{m}{s^{2}}\\\\ObjectB=0.3\frac{m}{s^{2}}[/tex]
So, what is true about the acceleration of object A and object B?
The answer is that the acceleration of the object B is half of the object A acceleration since the mass of the object B is two times the mass of the object A.
Have a nice day!
The acceleration of Object A will be greater than the acceleration of Object B, as Object A has half the mass of Object B but both are subjected to the same force.
The question pertains to the basic principles of Newton's Second Law of Motion, which states that the force acting on an object is equal to the mass of that object multiplied by its acceleration (F = ma). For Object A with a mass of 25 kilograms and Object B with a mass of 50 kilograms, both subjected to the same force of 15 newtons, we can determine that Object A will have a greater acceleration than Object B.
To find the acceleration for each object, divide the force by the mass of each object. For Object A: acceleration = 15 N / 25 kg = 0.6 m/s². For Object B: acceleration = 15 N / 50 kg = 0.3 m/s².
Hence, the acceleration of Object A is twice that of Object B, because Object B has twice the mass of Object A and since they are both subjected to the same force.
Determine if the following statement quantitative or qualitative. The cup had a mass of 454 grams.
Answer:
1.quanti
2. quanti
3.quali
4.quanti
5.quanti
6.quali
7.Quali
8?Quanti
9.Quali
10.Quanti
What property of water allows it to rise up in a plant
The property of water that allows it to rise up in a plant is its cohesion and adhesion properties
What is capillarity?Capillarity, also known as capillary action, is the ability of a liquid to flow in narrow spaces, such as thin tubes or porous materials, due to the combined effects of adhesion, cohesion, and surface tension. This phenomenon occurs because the adhesive forces between the liquid and the solid surfaces are stronger than the cohesive forces between the liquid molecules.
Cohesion refers to the attraction between water molecules, which allows them to stick together, while adhesion refers to the attraction between water molecules and the walls of the xylem vessels in the plant.
These two properties work together to create a continuous column of water from the roots to the leaves of the plant, allowing it to transport water and nutrients to all parts of the plant.
This process is known as capillary action. Additionally, water's ability to evaporate through tiny openings in the leaves, called stomata, creates a pulling force, known as transpiration, that helps draw more water up the plant.
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What it the function of your Pinna? The pinna is a part of your ear. But seriously, What is the function of a Pinna?
Hello! The function of the Pinna is to be a kind of funnel that assists in directing sound further into the ear. Without this funnel the sound waves would take more direct routes to the auditory canal. This would be difficult and wasteful as much of the sound would be lost making it harder to understand the sounds. Hope this helps!
The pinna plays a crucial role in the auditory system by aiding in sound collection, localization, amplification, and protection of the more sensitive parts of the ear.
The function of the pinna, which is the external part of the ear, is to collect sound waves and funnel them into the ear canal towards the eardrum. Additionally, the pinna helps in localizing the source of a sound by providing directional cues, which are particularly important for vertical localization (determining if a sound is coming from above or below). The unique shape of the pinna also aids in amplifying certain frequencies, which can enhance the perception of sound.
To understand the role of the pinna in sound localization, consider the following:
1. Sound Collection: The cupped shape of the pinna collects sound waves and directs them into the ear canal. This increases the sound pressure at the eardrum, which is beneficial for hearing faint sounds.
2. Directional Cues: The pinna's shape causes different frequencies to be reflected or absorbed in a way that depends on the angle of incidence of the sound wave. This creates a unique frequency signature for sounds coming from different directions, especially in the vertical plane.
3. Amplification: The pinna can amplify certain frequencies, particularly those in the range of human speech, making it easier to hear and understand conversations in noisy environments.
4. Protection: The pinna also serves to protect the more delicate structures of the middle and inner ear from mechanical damage and foreign objects.
i spilled water in my socket the one in the plug not a sock the plug
that isn't a question, and it makes no sense
1. The sun and other stars produce visible light by
a. fluorescence.
b. luminescence.
c. incandescence.
d. electroluminescence.
HELP FAST If a ball is thrown with a force of .5N and an acceleration of 2.0m/s^2, what is the balls mass?
Answer:
0.25 kg
Explanation:
Newton's second law states that:
[tex]F=ma[/tex]
where
F is the net force acting on an object
m is the object's mass
a is its acceleration
In this problem, we have:
[tex]F=0.5 N[/tex] is the force exerted on the object
m is the ball's mass
[tex]a=2.0 m/s^2[/tex] is its acceleration
Solving the formula for m, we can find the ball's mass:
[tex]m=\frac{F}{a}=\frac{0.5 N}{2.0 m/s^2}=0.25 kg[/tex]
A dry cell changes ____ energy into ____energy.
➷ A dry cell changes chemical energy into electrical energy.
✽➶ Hope This Helps You!
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➶ Have A Great Day ^-^
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A dry cell converts chemical energy into electrical energy through redox reactions, during which the bonds of reactants are broken and new bonds are formed in the products, releasing energy that is harnessed as electrical current.
A dry cell changes chemical energy into electrical energy. This process is an example of an energy transformation where the energy stored within the chemical compounds of the dry cell is converted into an electrical current that can be used to power electrical devices. The construction of a dry cell battery includes chemical reactions which facilitate this change, and these reactions are described as spontaneous redox reactions where oxidation occurs at the anode and reduction at the cathode.
During this energy transformation, the potential energy stored within the chemical bonds of the reactants is being altered as the bonds are broken and new ones are formed in the products. It is this change in bond energy that is harnessed as electrical energy. However, it's worth noting that dry cells are considered primary batteries, meaning they are single-use and cannot be recharged due to their construction and the nature of the reactions involved.
If 500 J of energy were added to 1 kg of each of these samples, which would experience the LEAST temperature increase? aluminum, Brass, Copper, Platinum
The specific heat capacities of different metals determine the amount of heat required to raise their temperature by 1K. The metals provided have the following heat capacities.
Aluminium-921
Brass-401
copper-376
Platinum-125
The higher the heat capacity, the more the energy required to raise the temperature. Therefore, aluminium has the least temperature increase.
Answer: A) Aluminum
Explanation:
If you are in USA TEST PREP!!!
is the form of energy that is transferred because of a difference in temperature.
4.1: Temperature is not the same as heat. Heat is energy in transfer. ... Conduction is the transfer of thermal energy (heat in transfer) due to collisions between the molecules in the object. Collisions between adjacent atoms and molecules transfer kinetic energy from the warmer to the cooler object.
Answer:
Heat
Explanation:
Temperature is measurement of how hot or cold an object is. The net energy of a body is known as thermal energy. Energy in the form of Heat is transferred from one body to another because of difference in temperature. It is basically the transfer of thermal energy. The heat transfer takes place via conduction, convection or radiation.
How does the heat content of the reaction change in the process of photosynthesis when a glucose molecule is formed? A. the value of q is negative B. the value of q is positive C. the value of q remains constant D. the value of q decreases E. the value of q equals zero
The correct answer is :
B. the value of q is positive.
Hope this helps,
Davinia.
Answer : The correct option is, (B) the value of q is positive.
Explanation :
Photosynthesis : It is a chemical process or a reaction which takes place in the green plants or the living organisms. During this process, the carbon dioxide reacts with the water in the presence of sunlight to gives glucose and oxygen as a product.
The balanced chemical reaction will be,
[tex]6CO_2+6H_2O\overset{sunlight}\rightarrow C_6H_{12}O_6+6O_2[/tex]
As we know that the photosynthesis reaction can not takes place without sunlight. So, the photosynthesis reaction is an endothermic reaction in which the energy or heat are given to the system. That means the value of 'q' will be positive. If heat is released by the system then the value of 'q' is negative.
Hence, the correct option is, (B) the value of q is positive.
How does a shiny , silver and smoothsurface reduce the heat loss of a hot object to its cooler surroundings
Shiny surface are poor radiators of heat
Explanation:A shiny , silver and smooth surface reduce the heat loss of a hot object to its cooler surroundings because good radiators and good absorbed of heat have dull, black and rough surfaces while on the other hand poor radiators have smooth and shiny surfaces therefore they reduce the heat loss of a hot object.
How much a transformer steps-up or steps-down the voltage is determined by the _________.
A.) Turns Ratio
B.) Batteries
C.) Fuses
D.) Transmission
It's determined by the turns ratio. (A)
A.) Turns Ratio is the answer
You are designing a pendulum clock to have a period of 1.0 s. The acceleration of gravity is 9.81 m/s2 . How long should the pendulum be? Answer in units of m.
Answer:
0.25 m
Explanation:
The period of a pendulum is given by
[tex]T=2 \pi \sqrt{\frac{L}{g}}[/tex]
where in this case
T = 1.0 s is the period of the pendulum
g = 9.81 m/s^2 is the acceleration due to gravity
L is the length of the pendulum
Re-arranging the equation and solivng for L, we find the length of the pendulum:
[tex]L=g (\frac{T}{2 \pi})^2=(9.81 m/s^2)(\frac{1.0 s}{2\pi})^2=0.25 m[/tex]
Answer:
.248490m
Explanation:
Using the equation:
T=Time
L=Length
g=Gravitational Force≈9.81
T= [tex]2\pi \sqrt{L/g}[/tex] or easier written to find the length using time: [tex]L=\frac{T^{2} *g}{4\pi^{2} }[/tex]
so simply plugging in 1 for T we get [tex]\frac{9.81}{4\pi^{2} } \\[/tex]≈.25m
explain the difference between an electrically charged and a neutral object
An electrically charged element is called an "ion". A neutral element is an atom.
A simple harmonic oscillator takes 13.5 s to undergo five complete vibrations. Find the period of its motion. Answer in units of s.
Period is the time taken for one complete oscillation in a harmonic motion.
Five oscillations take 13.5s
Period= total time for the n vibrations÷ the n vibrations.
Then one oscillation will take 13.5s÷5=2.7s
Therefore the period of the this motion is 2.7s
to protect a material from the influence of an external magnetic field, the material should be kept in?
A. Soft iron ring
B. Square steel ring
C. Loop of copper wire
D. Triangular zinc
To protect a material from the influence of an external magnetic field, the material should be kept in soft iron ring.
So the correct answer is A.
Hope this helps,
Davinia.
What is the wave speed of a wave that has a frequency of 250 Hz and a wavelength of 0.35 m?
Write the equation.
list known variables
solve
Answer:
87.5 m/s
Explanation:
The speed of a wave is given by
[tex]v=\lambda f[/tex]
where
v is the wave speed
[tex]\lambda[/tex] is the wavelength
f is the frequency
In this problem, we have
[tex]f=250 Hz[/tex] is the frequency
[tex]\lambda=0.35 m[/tex] is the wavelength
Substituting into the equation, we find
[tex]v=(0.35 m)(250 Hz)=87.5 m/s[/tex]
What happens when two waves meet
Wave interference is the phenomenon that occurs when two waves meet while traveling along the same medium. The interference of waves causes the medium to take on a shape that results from the net effect of the two individualwaves upon the particles of the medium.Hope this help!
wave interference is the phenomenon that occers when two waves meet while traveling along the same medium. The interference of waves causes the medium to take shape that results that the net effect of the two individual waves upon the particals of the medium.
calculate the change in potential energy of 8 million kg of water dropping 50 m over niagara falls
Potential energy=mass*acceleration due to gravity*height
= 8 000 000 * 9.8 * 50
= 3.92 * 10^9
The change in the potential energy of the Niagara falls is - 3.92 x 10⁹ J.
The given parameters;
mass of the water, m = 8 x 10⁶ kgheight of the water fall, h = 50 m.The change in the potential energy of the waterfall is calculated as follows;
ΔP.E = mgh₂ - mgh₁
ΔP.E = mg(h₂ - h₁)
where;
h₂ is the final height of the waterfall h₁ is the initial height of the waterfallΔP.E = 8 x 10⁶ x 9.8(0 - 50)
ΔP.E = - 3.92 x 10⁹ J
Thus, the change in the potential energy of the Niagara falls is - 3.92 x 10⁹ J.
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Which of the following are clues that a chemical reaction may have taken place?
A.Temperature remains constant
B.Release of heat
C.Formation of a solid
D.Mass increase
its d: mass increase
Answer:
The answer is formation of a solid and release of heat (APEX)
Explanation:
The period of a sound wave is 0.002 seconds. The speed of sound is 344 m/s. whats the frequency
Answer:
= 500 Hz
Explanation:
A Period of a wave is the time taken for one complete oscillations by the wave particles. It is measured in seconds.
Frequency on the other hand is the number of complete oscillations covered by a wave in one second. It is measured in Hertz.
Period is the inverse of frequency.
That is; Period, T = 1/ frequency, f
T = 1/f and thus; f = 1/T
Therefore;
f = 1/0.002 seconds
= 500 Hz
The frequency of a sound wave with a period of 0.002 seconds is 500 Hz. The provided speed of sound is useful for calculating the wavelength of the sound wave when combined with the frequency.
Explanation:The frequency of a sound wave is given by the inverse of the period. Since the period of the sound wave is 0.002 seconds, to find the frequency, you would use the formula:
Frequency (f) = 1 / Period (T)
Frequency (f) = 1 / 0.002 seconds = 500 Hz
The speed of sound at room temperature, which is approximately 344 m/s, is not directly needed to calculate the frequency from the period. However, this information can be used to find the wavelength of the sound wave using the relationship:
Speed (v) = Frequency (f) × Wavelength (λ)
In this case, if you wanted to find out the wavelength of a sound with a frequency of 500 Hz, it would involve rearranging the formula to solve for the wavelength.
Must all species reproduce in order for the species to survive?
A.
No; not all species reproduce.
B.
No; plants don't reproduce, and they survive.
C.
Yes; without reproduction, living organisms would get lonely.
D.
Yes; without reproduction, once the living organisms died, there would be no offspring to replace them
ANSWER:
the correct answer is D.Yes; without reproduction, once the living organisms died, there would be no offspring to replace them.
TIP: bc if a species dies and it doesnt reproduce that species will go extinct, and remember every specie plays a role in life (but they are some animals that dont and are just a threat to the world). so reproducing is the only way to keep their generation going!
~batmans wife dun dun dun...aka ~serenitybella
The correct answer is :
D. Yes; without reproduction, once the living organisms died, there would be no offspring to replace them.
If every species didn't reproduce they'd eventually all start dying and then there would be none left. (reproduce or reproducing basically means when a species gets pregnant and has more species. :D)
Hope this helps,
Davinia.
A ball is thrown straight up into the air with a speed of 10 m/s . If the ball has a mass of 0.3 kg how high does the ball go ?
= 5.102 m
Explanation;The total energy, i.e. sum of kinetic and potential energy, is constant.
That is; E = KE + PE
Initially, PE = 0 and KE = 1/2 mv^2
At maximum height, velocity=0, thus, KE = 0 and PE = mgh
Since, total energy is constant (KE converts to PE when the ball is rising).
Therefore, KE = PE
or, 1/2 mv^2 = mgh
or, h = v^2 /2g
= 10^2 / (2x9.8)
= 5.102 m
Answer:
5.1
Explanation:
apex
What is waters characteristic shape due to
In polar covalent bonding, electrons are shared unequally between atoms, due to the unequal distribution of electrons between atoms of different elements, slightly positive and slightly negative charges appear in different parts of the molecule.
In this context, water molecule is an exellent example of this type of bonding:
Water ([tex]H_{2}O[/tex]) can stick to itself through hydrogen bonds, because a water molecule consists of 2 hydrogen atoms attached to 1 oxygen atom.
The oxygen atom tends to monopolize more electrons and keeps them away from hydrogen. Then, it can be said that a water molecule will have a negative side (oxygen) and a positive side (hydrogen).
Thanks to this polarity, water molecules can stick together with the formation of hydrogen bonds to attract a partial positive charge of hydrogen and a more electronegative atom, such as oxygen.
Look at the picture of the prism separating light. Which explains why a prism can separate sunlight into a rainbow of all the visible colors?
a. The prism reflects light of each wavelength at a different angle.
b. Light of each wavelength is refracted at a different angle.
c. The glass of a prism absorbs some colors and transmits others.
d. Light of each wavelength travels at a different speed through a vacuum.
I think the answer is c I’m not sure plz help.
It is either A or B i hope this helps
A spring is 14cm long. Three masses are hung from it and then it is measured again. Now it is 19.5cm long. What force did the three masses provide? The spring constant for the spring is 30N/m
Answer:
1.65 N
Explanation:
The force applied on the spring is given by Hook's Law:
[tex]F=k \Delta x[/tex]
where
k = 30 N/m is the spring constant
[tex]\Delta x = 19.5 cm - 14 cm = 5.5 cm = 0.055 m[/tex] is the elongation of the spring relative to its initial position
Substituting the numbers into the equation, we find the force applied to the spring:
[tex]F=(30 N/m)(0.055 m)=1.65 N[/tex]
__________ occurs when a substance emits light after absorbing light or other electromagnetic radiation of a different wavelength.
A.) Incandescence
B.) Prominence
C.) Fluorescence
The answer Is C i hope this is helpfull
Fluorescence occurs when a substance emits light after absorbing light or other electromagnetic radiation of a different wavelength. Thus, the correct option is C.
What is Electromagnetic radiation?Electromagnetic radiation may be defined as a type of radiation that includes all possible kinds of radiation such as X-rays, gamma rays, radio waves, etc that consists of varied electric as well as the magnetic field.
Fluorescence may be defined as the process of emission of light by a specific substance that has initially absorbed light through the means of electromagnetic radiations. It is also known as luminescence.
The light that has been emitted by substances may be of a longer wavelength or shorter wavelength depending on the frequency of that radiation.
Therefore, Fluorescence occurs when a substance emits light after absorbing light or other electromagnetic radiation of a different wavelength. Thus, the correct option is C.
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