Answer:
Theories may be revised over time as information is discovered or technology is developed.
Explanation:
A scientific theory is a set of knowledge related to a particular problem of interest, be it academic or practical. The structure of a theory is formed by the following main elements: problem, evidence, postulates, axioms, questions, hypotheses, predictions, theses, rules and laws. Theory seeks to explain a particular phenomenon or problem of society, so theories can be revised and change as society changes and new technologies and new information are discovered.
What type of bonding is represented in Figure 2-2???
What might happen to the continents if the Atlantic Ocean continues to expand because of movement along this ridge?
What is the standard unit used to measure mass?
cubic meters
gram
liter
meter
Answer:
The standard unit used to measure of mass is gram.
(2) is correct option.
Explanation:
S.I is the standard international system of unit.
The S.I unit of mass is kilogram.
1 kg = 1000 gm
So, We can say that,
The standard unit used to measure mass is gram.
Cubic meter is the unit of volume.
Liter is the unit of water.
Meter is the unit of length.
Hence, The standard unit used to measure of mass is gram.
Which of the following are in the correct order from smallest or largest?
A) milimeter, meter,centimer, kilometer
B) milimeter, centimer, meter, kilometer
C) centimer,milimeter, meter, kilometer
D) meter, milimeter, centimeter, kilometer.
What is the biggest star in our universe?
Answer: The largest known star in the universe is UY Scuti, a hypergiant with a radius around 1,700 times larger than the sun. And it's not alone in dwarfing Earth's dominant star.
Explanation:
A ball is thrown straight up into the air, with an initial speed of 18.2 m/. How far has it gone after 1.00 s?
Answer: 13.3 m
I got it right on Acellus
What kind of energy does a microwave use to cook food? Select one: Elastic potential energy Electomagnetic energy Kinetic energy Chemical energy
what is the average of 84,56,92,73,and 45
A capacitor is charged to a potential difference of 12v it delivers 40% of its stored energy to a lamp what is the final potential difference across the capacitor
The final potential difference across the capacitor after delivering 40% of its stored energy to a lamp is approximately 9.49V.
Explanation:The question asked is related to the energy stored in a capacitor and its link to the potential difference across it. The energy stored in a capacitor is given by the relation Uc = CV²/2, where C is the capacitance and V is the potential difference. When a capacitor delivers 40% of its stored energy to a lamp, this means a reduction in the stored energy and therefore a corresponding reduction in potential difference as well.
As the stored energy is directly proportional to the square of the potential difference, if the energy reduces to 60% (after delivering 40%), the final potential difference will be the square root of this fraction (sqrt(0.6)) times the initial potential difference. The final potential difference across the capacitor will therefore be sqrt(0.6) * 12V, which is approximately 9.49V.
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What is the distance from the earth's center to a point outside the earth where the gravitational acceleration due to the earth is 1/40 of its value at the earth's surface?
It measures 7,926 miles (ca. 12,756 km) in diameter (the distance from one side to the other via the centre of the Earth) (about 12,756 kilometres). When the diameter of Earth is calculated between the North and South Poles, it is somewhat smaller at 7,907 miles (ca. 12,725 km).
What centres to a point outside the earth?Joseph Louis Lagrange, a mathematician, developed the so-called Lagrangian points, one of which is L2. Lagrangian's points are places in space where the interaction between a body's orbital motion and gravity forces is balanced. As a result, spaceships can use them to “hover.”
Therefore, The gravity at the equator would be zero if the earth were roughly 36,000 km in circumference, the same mass, and the same length of day. This is where geostationary orbits are located.
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Final answer:
To find the point where the Earth's gravitational acceleration is 1/40 of the surface value, we use Newton's law of gravitation and solve for r', yielding a distance of approximately 40225 km from the Earth's center.
Explanation:
To determine the distance from the Earth's center to a point where the gravitational acceleration is 1/40 of its value at the Earth's surface, we can use the law of universal gravitation. The force of gravity according to Newton's law of gravitation is given by F = GMm/r², where G is the gravitational constant, M is the mass of the Earth, m is the mass of the object, and r is the distance from the center of the Earth.
The gravitational acceleration g at the surface of the Earth is g = GM/r². If we want to find the point where this acceleration is 1/40 of its surface value g0, we set g = g0/40, which leads to GM/(r')² = GM/(R² * 40), where R is the radius of the Earth and r' is the new distance from the Earth's center. Solving for r', we get r' = R * √40. Using the mean radius of the Earth R ≈ 6371 km, we find:
r' ≈ 6371 * √40 km ≈ 6371 * 6.32 km ≈ 40225 km.
This means the distance from the Earth's center to the point where gravitational acceleration is 1/40 of its surface value is approximately 40225 km.
What unit is electronegativity measured in?
Electronegativity is measured on a relative, dimensionless scale known as the Pauling scale. The scale is based on the ability to attract electrons when forming covalent bonds, with fluorine set at 3.98 and other elements scaled against this value. The Pauling scale is the standard despite the abstract nature of electronegativity.
Electronegativity is measured on a relative scale called the Pauling scale. This scale was developed by Linus Pauling in the 1930s. On the Pauling scale, which is the most commonly used scale for measuring electronegativity, electronegativity is dimensionless and has no unit of measure. Fluorine, the most electronegative element, is set at a value of 3.98. All other elements are assigned values from 0 to 4.0 based on their relative ability to attract a bonding pair of electrons compared to fluorine.
The notion of electronegativity is crucial in understanding the chemical behavior of elements, particularly in the formation of covalent bonds. The higher the electronegativity value of an element, the more strongly it tends to attract bonding electrons. Fluorine's high electronegativity makes it an important reference point against which the electronegativities of other elements are measured.
Since electronegativity is an abstract property and cannot be measured directly, the Pauling scale is based on observable quantities such as the strengths of covalent bonds and molecular dipole moments. Different scales may use various methodologies, but the Pauling scale remains the standard for discussed trends in electronegativity.
How do you solve this system of equations. x+y−z = 0 5.08x − 9.96y = 5.31 9.96y − 14.72z = −10.37?
What word doesn't belong: planet, galaxy, sun, moon?
Galaxy is "all-encompassing" of the other words given so it doesn't belong.
What is galaxy?A galaxy is a collection of stars, stellar remnants, interstellar gas, dust, and dark matter that is gravitationally bound. The name comes from the Greek word galaxias, which translates to mean "milky" and refers to the Milky Way galaxy, which houses the Solar System.
Given in the question word doesn't belong: planet, galaxy, sun, moon
So, we can see "galaxy" is "all-encompassing" of the other words given, so it does not belong.
Galaxy is "all-encompassing" of the other words given so it doesn't belong.
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Question 25
Astronauts orbiting the earth in the space shuttle experience a force of gravity that is
several times greater than the Fgrav experienced on Earth's surface.
several times smaller than the Fgrav experienced on Earth's surface.
a fraction greater than the Fgrav experienced on Earth's surface.
a fraction smaller than the Fgrav experienced on Earth's surface .
... nonsense! Orbiting astronauts do not experience any gravitational pull from the earth.
Astronauts orbiting earth experience a fraction smaller gravitational force (Fgrav) as compared to the force on Earth's surface. They are in a state of continuous freefall which gives the impression of weightlessness, not because gravity is absent.
Explanation:The force experienced by astronauts orbiting the Earth, notably, is actually a fraction smaller than the gravitational force (Fgrav) experienced on Earth's surface. However, it is a common misunderstanding that astronauts in orbit experience zero gravity. Though it might appear they are weightless and therefore not subject to gravity, this is not the case. They are in a state of continuous freefall towards the Earth. The sensation of weightlessness is because they're in freefall, not because gravity is absent. The effect of gravity diminishes as distance from the Earth increases, hence why the gravitational force is a fraction smaller.
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How would our society be affected if there was a shortage of copper?
If it requires 5.0 j of work to stretch a particular spring by 1.8 cm from its equilibrium length, how much more work will be required to stretch it an additional 3.7 cm ?
Describe the differences among ultraviolet waves, visible light waves, and infrared waves. how are these waves alike?
The purpose of biofeedback is to help subjects __________.
A) control their internal processes
B) understand how fear holds them back
C) determine whether they are sick
D)manipulate computers without a keyboard
The purpose of biofeedback is to help subjects "control their internal processes".
Biofeedback is a kind of treatment that utilizes sensors joined to your body to gauge key body capacities. Biofeedback is expected to enable you to take in more about how your body functions. This data may assist you with developing better power over certain body capacities and address wellbeing concerns.
This feedback causes you center around rolling out inconspicuous improvements in your body, for example, loosening up specific muscles, to accomplish the outcomes you need, for example, decreasing agony. Generally, biofeedback enables you to utilize your musings to control your body, frequently to enhance a wellbeing condition or physical performance.
What is the angular position in radians of the minute hand of a clock at 2:55?
A hydraulic arrangement consists of a water-filled u-tube that is wider on one end than on the other. pistons are fitted in both ends. to multiple an input force, the input end should be the one having the ___
Final answer:
To multiply an input force in a hydraulic system, the input end should have a smaller area. This allows for a larger output force through Pascal's law, which is a principle used in hydraulic systems to provide a mechanical advantage.
Explanation:
To multiply an input force in a hydraulic system, the input end should be the one having the smaller area. When a force is applied to a small area, the resulting pressure is transmitted through the hydraulic fluid to a larger area on the output end, resulting in a greater output force. This principle is based on Pascal's law, which states that pressure in an enclosed fluid is transmitted undiminished in all directions.
Your hydraulic system will give you a mechanical advantage by applying the input force on a smaller area to output a greater force on a larger area. For example, applying a 100-N force on the smaller input piston can produce a 500-N force on the output piston if the output piston is five times larger in area.
Hydraulic systems are often compared to simple levers, but have the benefit that they can transmit forces through complex paths, allowing diverse applications from brakes in vehicles to heavy lifting in industrial settings.
A net force of 55 N acts due west on an object. What single force on the object produces equilibrium?
The force that will make this into equilibrium would be equal to the force of equal amount yet applied on the opposite direction.
So we are given that a force of 55 N due west was applied, so the equilibrium force would be 55 N due east.
Final answer:
To achieve equilibrium against a 55 N force acting due west, a single equal and opposite force of 55 N must be applied due east. In various scenarios, the equilibrium force must have the same magnitude but opposite direction to the acting force. Pythagorean theorem helps calculate net force when forces are perpendicular.
Explanation:
For an object to be in equilibrium, the net force acting on it must be zero. This means that to counteract a force of 55 N acting due west, an equal and opposite force must be applied. The single force that would produce equilibrium in this case is a 55 N force acting due east.
Applying this principle, we can understand the scenarios presented:
A point in equilibrium with a force F₁ having components 15 N south and 13 N west must be countered by a force F₂ with components 15 N north and 13 N east.For the given free-body diagram showing a northward force of 64 N and a westward force of 38 N, the net force can be calculated using the Pythagorean theorem to assess the magnitude of the resultant force.If two forces of 5 N to the right and 7 N to the left act on an object, the net force is 2 N to the left, and the object cannot be in static equilibrium since there is a resultant force.When forces of 50 N and 80 N act in the same direction, the net force is simply their sum, 130 N, in the direction of the greater force.Lastly, a charge in an electric field experiencing a net force of 100 N eastward when the field points north is impossible, since the electric force on a charge by a field is in the direction of the field. Therefore, the force must be perpendicular to the direction of the electric field strength of 50 N/C pointing north.
on a distant planet, a freely falling object gains speed at a steady rate of 20 m/s during each second of fall. Calculate its acceleration
The acceleration of a freely falling object is 20 m/s if the distant planet, a freely falling object gains speed at a steady rate of 20 m/s during each second of fall.
What is linear acceleration?It is defined as the rate of change in linear velocity with respect to time. It is also known as linear acceleration.
It is given that:
on a distant planet, a freely falling object gains speed at a steady rate of 20 m/s during each second of fall.
As we know, from the acceleration the rate of change in linear velocity with respect to time. It is also known as linear acceleration.
The acceleration of an item is the amount of speed it gets or loses per second when only its speed is changing and not its direction.
Thus, the acceleration of a freely falling object is 20 m/s if the distant planet, a freely falling object gains speed at a steady rate of 20 m/s during each second of fall.
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Thermal energy produced by friction cannot usually be used to do work. true/false
Answer:
false
Explanation:
Work may be done in positive or negative direction. When a work is done in positive direction, it is called useful work, when work is done in negative direction, it is known as useless work. Any energy associated with friction produces useless work. That is, the work is done in negative direction.
Therefore, thermal energy produced by friction can be used to do work but in negative direction.
The correct option is false.
A car travels in a straight line for 3.7 h at a constant speed of 71 km/h . what is its acceleration? answer in units of m/s 2 .
Answer:
a=0 m/s2
Explanation:
t=3,7 h=13320 s
v=const=71 km/h=19,7222 m/s ( 71*1000 m/2600 s=19,7222222 m/s)
if the speed is constant
a=Δv/Δt
since Δv= 0m/s since the speed is constant...
if the speed would rise from 0 m/s to 19.72222m/s
then a=(19.7222 m/s)/13320 s
a=0.00148 m/s2
A car travels in a straight line for 3.7 h at a constant speed of 71 km/h . what is its acceleration? answer in units of m/s 2
When a star leaves the main sequence and expands toward the red giant region, what is happening inside the star?
If you are looking for a material that is a good conductor, you will look for a material that will (2 points)
readily accept neutron flow.
resist neutron flow.
readily accept electron flow.
resist electron flow.
beth walked to the school in 80 seconds from a position 100 m west of the school. what was her velocity?
What part of an atom can change during a nuclear reaction but cannot change during a chemical reaction
Answer:
The answer would be The number of protons and neutrons
Neutrons and protons cannot be removed from nucleus from chemical reactions because they are strongly held together but nuclear reactions are strong enough to separate them
Explanation:
Nuclear reactions involve a change in the nucleus of an atom, usually producing a different element. Chemical reactions, on the other hand, involve only a rearrangement of electrons and do not involve changes in the nuclei
A large rock has a mass of 50 kg and is rolling downhill at 3 m/s. What is its momentum?
The momentum of the large rock that has a mass of 50kg and is rolling downhill at 3 m/s is 150kgm/s.
HOW TO CALCULATE MOMENTUM:
The momentum of the rock can be calculated by multiplying the mass of the rock by its velocity:Momentum (p) = mass (kg) × velocity (m/s)According to this question, a large rock has a mass of 50 kg and is rolling downhill at 3 m/s. The momentum is calculated as follows:Momentum (p) = 50kg × 3m/sMomentum (p) = 150kgm/sTherefore, the momentum of the large rock that has a mass of 50kg and is rolling downhill at 3 m/s is 150kgm/s.Learn more about how to calculate momentum at: https://brainly.com/question/20644069?referrer=searchResults
The metric system is based on units of
A: twenty five
B fives
C: sixteen
D: tens