The unit of momentum is kg-m/sec, and the unit of momentum in terms of Newton is N-s.
The momentum of an object is the vector product of the mass of the object and its velocity. It is denoted by P. It is a vector quantity.
P = mv
So its unit will be (kg) × (m/s) = kg-m/s
We also know that the time rate of change of momentum is called force,
F = ΔP/Δt
ΔP = FΔt = Force × change in time
So the SI unit of momentum in terms of Newton will be, N × Sec = N-s
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1. A ____ current means that more _____ flows per second.
2. A student connects up an ammeter in a circuit with a lamp and a cell. The reading is 0.5 A. She moves the ammeter to the other side of the lamp.
a. What will the ammeter read now?
b. Explain your answer.
1.
A stronger current means that more charge flows per second.
2.
a. The ammeter will read the same, 0.5 A.
b. The ammeter measures the flow of electric charge in a circuit, which is called the current. The amount of current in a circuit depends on the properties of the components in the circuit, not the position of the ammeter. Therefore, moving the ammeter to the other side of the lamp will not change the current flowing through the circuit, and the reading will remain the same.
1. An electrical current means that more electrons flows per second.
2. a. 0.5 A
b. Because current always stays the same in series
circuits.
Which would the community health nurse be least likely to include when designing a community-based program within the context of a global framework?
A) Population
B) Provider
C) Procedure
D) Physician
Physician community health nurse be least likely to include when designing a community-based program within the context of a global framework. Correct option is A.
The community health nurse, when designing a community-based program within the context of a global framework, is least likely to include the physician. Community health nurses work with individuals, families, and communities to promote health and prevent disease. They focus on educating and empowering people to make informed health decisions, and engage in activities such as disease screening, health promotion, and environmental health assessments. Community health nurses may collaborate with other healthcare providers, including public health departments, community organizations, and schools, but physicians are typically not involved in the design and implementation of community-based health programs. The focus of a community health nurse's work is on the community, not individual medical care.
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"When a grasshopper egg hatches, a baby grasshopper called a pupa comes out of the egg and begins to grow. Although the nymph grasshopper already looks like a grasshopper, it still needs to molt its exoskeleton many times before becoming a full-grown adult."
When a grasshopper egg hatches, a baby grasshopper called a pupa comes out of the egg and begins to grow. The nymph grasshopper already looks like a grasshopper, it still needs to molt its exoskeleton many times before becoming a full-grown adult therefore the statement which corrects the error in the passage is that a baby grasshopper is a nymph and is therefore denoted as option B.
What is an Exoskeleton?This is referred to as an external skeleton that supports and protects an animal's body while an internal skeleton such as in humans is referred to as endoskeleton.
During metamorphosis, egg hatches into larva and then to nymph which is referred to as the baby of the insect involved thereby making it the correct choice.
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The full question:
"When a grasshopper egg hatches, a baby grasshopper called a pupa comes out of the egg and begins to grow. Although the nymph grasshopper already looks like a grasshopper, it still needs to molt its exoskeleton many times before becoming a full-grown adult."
Which statement corrects the error in the passage?
Question 3 options:
A baby grasshopper is a larva.
A baby grasshopper is a nymph.
The grasshopper nymph hatches.
The nymph has no exoskeleton
Three protein molecules make up the thin filament.
a. Which molecule has a binding site for myosin heads?_______________________
b. Which molecule covers this binding site?___________________________________
c. Which molecule has a binding site for calcium ions?________________________
Actin molecule has a binding site for myosin heads, tropomyosin molecule covers this binding site, and troponin molecule has a binding site for calcium ions.
Each globular actin molecule in the thin filaments has a myosin-binding site. The actin molecules are arranged in two long chains and coiled around one another. The myosin binding sites are covered by the tropomyosin protein, which coils itself around the fine filaments.
There is a myosin-binding site on each globular actin molecule in the thin filaments. Actin is composed of two lengthy chains that are coiled around one another. The tropomyosin protein, which coils itself around the tiny filaments, covers the myosin binding sites.
Troponin is a key player in the regulation of muscle contraction by calcium: The only component of the fine filaments in striated muscles that can bind calcium is troponin.
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what is the intermolecular force of attraction for libr?
The intermolecular force of attraction for LiBr is the Electrostatic force of attraction.
There are two ions in the compound LiBr (Lithium Bromide). These are
Lithium-ion ([tex]Li^{+1}[/tex]).Bromide-ion ([tex]Br^{-1}[/tex]).The lithium atom (Li) removes one electron from its valence shell to form the cation, Lithium-ion ([tex]Li^{+1}[/tex]). The Bromine atom (Br) accepts one electron to its valence shell to form the anion, Bromide-ion ([tex]Br^{-1}[/tex]).
Cations are positively charged and anions are negatively charged.
It is known that opposite charge always attracts each other. So, [tex]Li^{+1}[/tex] and [tex]Br^{-1}[/tex] attracts each other to form the ionic compound, Lithium Bromide (LiBr).
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They continue the discussion, and Imad makes several comments. Which of Imad's comments is false?A. "Electric field lines never cross each other."B. "At locations where electric field lines meet the surface of an object, the lines are parallel to the surface."C. "Electric field lines always extend from a positively charged object to a negatively charged object, from a positively charged object to Infinity, or from Infinity to a negatively charged object."D. "Electric field lines are most dense around objects with the greatest amount of charge."
The false statement among Imad's comments is D. "Electric field lines are most dense around objects with the greatest amount of charge." Therefore, option D is correct.
The density of electric field lines does not indicate the amount of charge on an object. The density of electric field lines represents the strength or intensity of the electric field at a given point. Electric field lines are closer together where the electric field is stronger, and farther apart where the electric field is weaker.
The density of electric field lines depends on factors such as the magnitude of the charge and the distance from the charged object.
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Show how to balance 3 masses hanging from a force table. (There is not a fourth mass to add). The masses are 3 kg, 4 kg, and 6 kg. You need to indicate the angles between the strings that will cause all of the masses to be all be in equilibrium.
Assuming the force table is set up so that the masses are placed at the vertices of an equilateral triangle, the angles between the strings should be 60 degrees.
How to balance 3 masses hanging from a force table?This will cause all of the masses to be in equilibrium.The angles between the strings can be calculated using the following formula:Angle = arccos ((m1*m2) / (m3*(m1+m2))) For this problem, the angles between the strings will be:Angle 1 = arccos ((3*4) / (6*(3+4))) = arccos (0.8) = 61.93° Angle 2 = arccos ((3*6) / (4*(3+6))) = arccos (0.75) = 56.31°Angle 3 = 180° - (Angle 1 + Angle 2) = 180° - (61.93° + 56.31°) = 61.76°Assuming the force table has four support points, the three masses can be balanced by adjusting the angles between the strings. To do this, the three masses must be arranged as far as possible from one another, with the 3 kg mass in the center and the other two masses, 4 kg and 6 kg, on the outside. To begin, the 4 kg mass should be suspended to the left of the 3 kg mass, and the 6 kg mass should be suspended to the right. The angle between the strings should be adjusted so that the 4 kg mass is suspended at an angle of 25 degrees, and the 6 kg mass is suspended at an angle of 155 degrees. This will ensure that the three masses are balanced, with the force exerted by the 4 kg mass equal to the force exerted by the 6 kg mass. To achieve equilibrium, the 3 kg mass should be suspended at an angle of 90 degrees from the 4 kg mass, and the 6 kg mass should be suspended at an angle of 90 degrees from the 3 kg mass. This will ensure that the forces acting on the 3 kg mass are equal, and the forces acting on the 4 kg and 6 kg masses are equal. This will result in a balanced system.To learn more about the force table refer to:
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describe how an electron can move to a higher energy state by absorbing a fixed quantum of energy. describe how an electron can move to a lower energy state by releasing a fixed quantum of energy.
Bohr proposed a concept in which electrons would move around in shells, with each shell containing a different number of electrons with a fixed amount of energy. Energy is lower in the lower shell and more in the upper shell. When an electron moves from a lower shell to a higher shell, it loses energy in the process. It must absorb energy.
The ground state is the lowest energy level an electron can have. An increased number of orbitals indicates a more excited state. The greater the electron's excitation state, the greater its energy. An electron will "jump" to a higher orbital when it absorbs enough energy. In this form, the system is said to be in an excited state. An electron in an excited state can "fall" to a less excited state by releasing energy. In doing so, it emits a photon, a discrete packet of electromagnetic energy. The energy of that photon is proportional to the gap between the electron's two states. The electron loses its ability to emit photons when it enters the ground state, but it retains the ability to absorb energy quanta and enter higher excitation states (higher orbitals).
The electron's freedom of motion is proportional to the number of energy levels it can experience. There is exactly one potential state transition between a single ground state and a single excitation state. Electrons can gain enough energy to enter the excited state by absorbing a single quantum of energy. Upon decaying from its excited state, the electron releases a photon of a constant energy equal to the energy it lost upon entering the lower orbital.
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what would be the escape speed from an object with the mass of the sun, but with a radius of 8,000 meters?
The sun's escape velocity is roughly 618 km/s.
What is the Sun's escape velocity? It is important to keep in mind that the Sun's escape velocity, which was estimated above, is 615 km/sec, which is more than 50 times faster than the average velocity of H at the Sun's surface. The equation for the escape velocity, vesc, is given by: vesc = Square root of 2GMr, where G is the gravitational constant, M is the mass of the attracting mass, and r is the distance from its center.Deflection Speed.Energy conservation is used to determine the escape velocity:I + k = u + kf.The potential energy of a mass m object at the surface of a planet with radius R and mass M is given by the equation U=-G m M/R.The escape velocity can be calculated using the formula vesc = 2GM/R, where vesc is the escape velocity, G is the gravitational constant, M is the object's mass, and R is the distance from the object's center.To learn more about Sun's escape velocity refer
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an egg drops from a second-story window, taking 1.12 s to fall and reaching 11.0 m/s just before hitting the ground. on contact, the egg stops completely in 0.131 s. calculate the magnitudes of its average acceleration (a) while falling and (b) while stopping
The average acceleration of the egg while falling can be calculated using the equation a = (v - u)/t, where v is the final velocity, u is the initial velocity and t is time.
The average accelerationa) A = (11.0 m/s) / (1.12 s) = 9.82 m/s^2
b) A = (0 m/s) / (0.131 s) = 0 m/s^2
This is a physics problem involving the concepts of acceleration, velocity, and time.Acceleration is the rate of change of velocity and is a vector quantity, meaning it has both a magnitude and direction.In this case, v = 11.0 m/s, u = 0 m/s and t = 1.12 s.This gives an acceleration of 9.82 m/s^2 downwards, the same value as the acceleration due to gravity.The average acceleration of the egg while stopping can be calculated using the same equation, but with v = 0 m/s, u = 11.0 m/s and t = 0.131 s.This gives an acceleration of -84.3 m/s^2, which is an acceleration directed upwards, opposite to the acceleration due to gravity.In summary, the egg experienced an average acceleration of 9.82 m/s^2 downwards while falling, and an average acceleration of -84.3 m/s^2 upwards while stopping.To learn more about The average acceleration refer to:
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explain why only a handful of solids exhibit ferromagnetic or ferrimagnetic behavior
Ferromagnetic or ferrimagnetic behavior is exhibited by only few solids because of the strong exchange interaction and high concentration of unpaired electrons required, as well as low temperature to prevent thermal disruptions.
Ferromagnetic or ferrimagnetic behavior is a rare phenomenon that is only exhibited by a few solids. This is due to a number of conditions that must be met in order for the material to exhibit this behavior, such as a strong exchange interaction, a high concentration of unpaired electrons, and low temperature to prevent thermal disruptions.
All of these conditions need to be met in order for the ferromagnetic or ferrimagnetic behavior to be present. Therefore, it is important to understand the physics and materials behind this behavior in order to better understand and utilize this phenomenon.
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how does the distribution of the home voltage compare to the distribution of the generator voltage? in other words, address uniformity, skewness, normality, etc.
The current is transmitted as an alternating current with a frequency of 50 Hz. The voltage when it arrives at your house is 240 volts. Portable generators provide a current (amps or amperes) at 120 and 240 volts.
Portable generators can supply 12 volts DC, 120 volts AC, or 240 volts AC power, but not all models can supply all three, and some can only supply 120 volts AC. Duplex (twin) outlets are common on portable generators, each supplying 120 volts. Electricity delivered to your home from the power company is 120 and 240 volts. This is called "nominal voltage". This is the voltage measured at the main transformer outside the house. The nominal voltage varies plus or minus 5% under ideal conditions.
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8. [2.0 pts) (Step C4 : foil pieces not initially touching) (a) Based on your observation, draw the distribution of top and bottom charges for both pieces of aluminum foil when: (1) The charged PVC pipe is nearby (ii) The charged PVC pipe has been moved away (b) Explain the initial and final charge distributions drawn above.
The distribution of the top and bottom charges for both pieces of the foil is as below. The initial charge distribution is determined by the movement of electrons from the charged PVC pipe to the aluminum foil pieces.
(a) (1) When the charged PVC pipe is nearby, electrons are transferred from the PVC pipe to the aluminum foil pieces due to the difference in their electrical potential. This results in one piece of foil becoming positively charged and the other piece becoming negatively charged.
(a) (ii) When the charged PVC pipe is moved away, the charges on the aluminum foil pieces will remain unchanged because the charges are now separated and will not interact with each other. The distribution of charges on the two pieces of foil will remain constant until another charged object is brought into close proximity.
(b) The initial charge distribution is determined by the movement of electrons from the charged PVC pipe to the aluminum foil pieces, resulting in one piece becoming positively charged and the other negatively charged. The final charge distribution is determined by the separation of charges on the foil pieces and the lack of interaction between the charges. The charges on the foil pieces will remain constant until they are affected by another charged object.
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Going downhill a driver applies brakes to keep a constant speed. The potential energy of the car is decreasing while the kinetic energy is constant. Explain where the energy is going?
The potential energy of a car moving with constant speed during downhill converts into heat energy or sound energy during braking.
What is law of conservation of energy?Energy cannot be created or destroyed, according to the law of conservation of energy. However, it is capable of change from one form to another.
When a car goes downhill, its potential energy decreases but as the driver applied braking, the gain in potential energy lost during work against the frictional force applied by the brake and converts into heat energy or sound energy during braking.
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a 12-volt electric motor has 1,000 watts input and 1 horsepower output. maintaining the same efficiency, how much input power will a 24-volt, 1-horsepower electric motor require? (note: 1 horsepower
The electric motor will require 1,000 watts input power. The result is obtained by comparing the formula for efficiency.
What is efficiency?Efficiency of an engine can be expressed as
η = P out/ P in
Where
P out = output powerP in = input powerPower is the amount of energy per unit of time.
An electric motor has
V = 12 VoltP₁ in = 1,000 wattsP₁ out = 1 horsepowerWith the same efficiency, the electric motor has
V = 24 voltP₁ out = 1 horsepowerFind output power! (P₂ in = ?)
1 horsepower = 746 watts
The efficiency is the same
η₁ = η₂
P₁ out/ P₁ in = P₂ out/ P₂ in
1 hp/ 1,000 watts = 1 hp/ P₂ in
P₂ in = 1,000 watts
Hence, the required input power of the electric motor is 1,000 watts.
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First come first serve, solve for points
When a substance melts, it can exist in both the solid and liquid states, and when it boils, it can exist in either the liquid or gaseous states.
What are the Implications of Different Boiling Points?
The ability to separate liquids through distillation is one practical use of the various boiling points of alcohols and alcohol in relation to water and other liquids. A liquid is carefully heated throughout the distillation process to cause the more volatile chemicals to boil away.They can be gathered and used to distil alcohol, or they can be used to remove substances with lower boiling points from the original liquid to purify it. Alcohols can be distinguished from one another and from other chemical compounds using their distinct boiling points. Alcohol and water can be separated using distillation. Water has a boiling point of 212 F or 100 C which is higher than that of alcohol.To learn more about liquid states refer to:
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does a heat flux vector at a point p on an isothermal surface of a medium have to be perpendicular to the surface at that point? explain.
A heat flux vector at a point p on an isothermal surface of a medium must be perpendicular to the surface at that point.
For differentiation between heat flux, there are three categories: convection, conduction, and radiation. For an isothermal surface, the heat flux must be normal to that surface at any point P. This is because the gradient of temperature on the isothermal surface in any direction parallel to the isothermal surface will be zero, thus the heat flux in the direction parallel to the surface area will not be there. The heat flux vector is directed towards regions of lower temperature. So, a heat flux vector at a point p on an isothermal surface of a medium must be perpendicular to the surface at that point.
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When traveling twice as fast your kinetic energy is increased _______.
When traveling twice as fast your kinetic energy is increased by four times.
Kinetic energy is the energy that can be seen as the motion of an item or a subatomic particle. It is also known as the energy of motion. Kinetic energy is a property that is shared by all moving objects and particles. To calculate the kinetic energy, we can use this following formula:
KE = ½ m × v²
Where:
M = mass of the body
V = velocity of the body
In this case, we are given that:
KE = ½ m × (2 × v)²
KE = 4 (½ × m × v²)
KE = 4 times initial KE
Therefore, the kinetic energy increases four times as the speed doubles.
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in some instances, people who happen to be near the point where a lightning bolt is struck the earth have reported that their clothes are thrown off as a result of a strike. why might this happen?
People that are near a point where a lightning bolt is gonna strike said that their clothes are thrown off by the strike because the lightning may come in contact with their sweat or raindrops that may lie on their skin's surface.
Lightning is an electrostatic discharge that naturally occurs. It happens when two electrically charged regions in the atmosphere (or one of them on the ground) are temporarily neutralized, causing an instant release of energy.
When a person is near a point where a lightning bolt struck the earth, they may experience their clothes getting thrown off. It happens because the lightning comes into contact with the liquid water on the skin's surface, like sweat or raindrops.
When the contact happens, the liquid water turns into steam. Its volume increased so much that it can create a vapor explosion that would throw off their clothes (sometimes even shoes).
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a copper cube has a mass of 80.7 g .find the edge length of the cube. (the density of copper is 8.96 g/cm3 , and the volume of a cube is equal to the edge length cubed.)
The edge length of the cube is approximately 0.11 meters.
The edge length of a cube can be found by using the formula for the volume of a cube and the density of the material it is made of.
Given that the density of copper is 8.96 g/cm³, the volume of a cube with a mass of 80.7 g can be calculated as:
V = m/р
where V is the volume, m is the mass (80.7 g), and ρ is the density (8.96 g/cm³).
Since the volume of a cube is equal to the edge length cubed, we can write the edge length, L, as:
L³ = V
L = [tex](V)^{\frac{1}{3} }[/tex]
Plugging in the values and converting from cm³ to m³, we get:
L = [tex](\frac{80.7}{8.96\times10^{-3} } )^{\frac{1}{3} }[/tex]
L = 0.11 m
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Using standard heats of formation, calculate the standard enthalpy change for the following reaction.
2H2S(g) + 3O2(g)2H2O(g) + 2SO2(g)
The standard enthalpy change for the reaction
2H2S(g) + 3O2(g)2H2O(g) + 2SO2(g) is -966.4 kJ/mol.
The standard enthalpy change of a reaction can be calculated using the standard heats of formation of the reactants and products. The standard heat of formation, ΔHf°, is the heat absorbed or released when one mole of a substance is formed from its elements in their standard states.
The standard enthalpy change of a reaction is given by the equation:
ΔH°rxn = ΣΔHf°products - ΣΔHf°reactants
where ΔHf°products and ΔHf°reactants are the standard heats of formation of the products and reactants, respectively.
For the reaction 2H2S(g) + 3O2(g) → 2H2O(g) + 2SO2(g), the standard heats of formation are:
ΔHf°H2S(g) = -20.5 kJ/mol
ΔHf°O2(g) = 0 kJ/mol (since O2 is an element in its standard state)
ΔHf°H2O(g) = -285.8 kJ/mol
ΔHf°SO2(g) = -296.8 kJ/mol
So, the standard enthalpy change for the reaction is:
ΔH°rxn = (2 ΔHf°H2O + 2 ΔHf°SO2) - (2 ΔHf°H2S + 3 ΔHf°O2)
ΔH°rxn = (2 × -285.8 + 2 × -296.8) - (2 × -20.5 + 3 × 0)
ΔH°rxn = -966.4 kJ/mol
Therefore, the standard enthalpy change for the reaction is -966.4 kJ/mol.
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in a collision between 2 and equal masses, how does the impulse imparted to the smaller mass by the larger mass compare with the impulse imparted to the larger mass by the smaller one? compared to magnitudes of impulses only.
The impulse imparted to the smaller mass by the larger mass will be equal to the impulse imparted to the larger mass by the smaller mass.
Impulse is the change in momentum. We know the time rate of change of momentum is defined as the force. And force times change in time is impulse. Mathematically,
[(m₁v₁ + m₂v₂) - (m₃v₃ + m₄v₄)]/Δt = F
Impulse = FΔt = (m₁v₁ + m₂v₂) - (m₃v₃ + m₄v₄)
According to Newton's third law, every action has an equal reaction but in the opposite direction. So the force and thereby impulse imparted by the smaller mass to the larger mass will be equal to the impulse imparted by the larger mass to the smaller mass. However after collision velocity will be different for both the masses to conserve the momentum.
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an airplane flies eastward and always accelerates at a constant rate. at one position along its path, it has a velocity of 33.3 m/s . it then flies a further distance of 49700 m , and afterwards, its velocity is 43.5 m/s . find the airplane's acceleration. acceleration: m/s2 calculate how much time elapses while the airplane covers those 49700 m.
The acceleration of the airplane is [tex]7.88\times 10^{-3} m/s^2[/tex] and the time elapsed while the airplane covers [tex]49700[/tex] [tex]m[/tex] is [tex]1294.42s[/tex].
Let us consider the value of acceleration is [tex]a[/tex] [tex]m/s^2[/tex] and the time elapsed while the airplane covers [tex]49700[/tex] [tex]m[/tex] is [tex]t[/tex] [tex]s[/tex].
It is given that,
The initial velocity of the airplane, [tex]u=33.3 m/s[/tex].
The final velocity of the airplane, [tex]v=43.5m/s[/tex].
The distance covered by the airplane, [tex]s=49700 m[/tex].
It is known that, [tex]v^2=u^2+2as[/tex].
[tex]\Rightarrow (43.5)^2=(33.3)^2+2a(49700)[/tex]
[tex]\Rightarrow 1892.25=1108.89+99400a[/tex]
[tex]\Rightarrow 1892.25-1108.89=99400a[/tex]
[tex]\Rightarrow 783.36=99400a[/tex]
[tex]\Rightarrow a=\frac{783.36}{99400}[/tex]
[tex]a=7.88\times 10^{-3} m/s^2[/tex]
Hence, the acceleration of the airplane is [tex]7.88\times 10^{-3} m/s^2[/tex].
It is known that, [tex]v=u+at[/tex].
[tex]\Rightarrow 43.5=33.3+(7.88\times10^{-3})t[/tex]
[tex]\Rightarrow 43.5-33.3=(7.88\times10^{-3})t[/tex]
[tex]\Rightarrow 10.2=(7.88\times10^{-3})t[/tex]
[tex]\Rightarrow t=\frac{10.2}{7.88\times10^{-3}}[/tex]
[tex]\Rightarrow t=1294.42 s[/tex]
Hence, the time elapsed while the airplane covers [tex]49700[/tex] [tex]m[/tex] is [tex]1294.42s[/tex].
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Which of these statements best describes how a star chart should be held while facing north?
The edge of the map labeled east should be held towards the observer.
The edge of the map labeled south should be held towards the observer.
The edge of the map labeled south should be held on the left of the observer.
The edge of the map labeled east should be held on the right of the observer.
The statements best describes how a star chart should be held while facing north is, The edge of the map labeled south should be held towards the observer.
What is star chart ?
A map or diagram of the stars and other celestial bodies in the sky is called a star chart. The locations of the stars, constellations, planets, and other celestial bodies are often displayed at a certain time and location on Earth. Star maps can be used to locate celestial bodies in the night sky, to organise astronomical observations, or to track their movements through time.
Given that,
The statements,
In between following options, best describes how a star chart should be held while facing north is,
The edge of the map labeled south should be held towards the observer
This is because when facing north, the direction labeled "south" on the map should correspond to the direction of the actual south, and thus be facing the observer.
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a 12 v battery of 0.05-ohm resistance and another battery of 12 v and 0.075 ohm resistance supply power to a 2-ohm resistor. what is the current through the load?
The required current through the load when two batteries are connected is calculated to be 11.3 A.
Two batteries are connected in series so their voltages should be added.
Total voltage V = 12 V + 12 V = 24 V
The total resistances of the two batteries is,
⇒ 0.05 + 0.075 = 0.125 ohm
Load resistance is given as 2 ohm.
Now, let us calculate the load current.
From ohm's law, we know that, V = i R
where, V is voltage
i is current
R is resistance
Making i as subject, we have,
i = V/R = 24/(2 + 0.125) = 11.3 A
Thus, the current through the load is calculated to be 11.3 A.
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triton, the largest moon of neptune, has a retrograde orbit. what does that mean?
Retrograde orbit means triton orbiting around the neptune in the direction opposite to the direction in which the neptune is rotating.
Retrograde orbit or retrograde motion is that motion of a planet/moon or any other celestial body, in which they rotate opposite to their prime's rotational direction. On the other hand, prograde motion of a moon or object is the rotational motion in the same direction of its primary.
In our solar system, all the planets and other objects, except many comets, prograde around the sun in the same direction in which the sun rotates around its own axis, except Venus and Uranus. However both of the planets' planetary rotational around their own axes are also prograde.
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A gas with initial state variables p1, V1, and T1 expands isothermally until V2=2V1.By what factor does the temperature change?By what factor does the pressure change?
The pressure changes by a factor of 2. The initial pressure (p1) is twice the final pressure (p2).
For an isothermal process, the temperature remains constant. Therefore, the factor by which the temperature changes is 1. There is no change in temperature (T2 = T1).
To determine the factor by which the pressure changes, we can use the ideal gas law equation:
pV = nRT
Where:
p = pressure
V = volume
n = number of moles
R = gas constant
T = temperature
Since the process is isothermal, we can rearrange the equation as:
p1V1 = p2V2
Given that V2 = 2V1, we can substitute this into the equation:
p1V1 = p2(2V1)
Simplifying the equation:
p1 = 2p2
Therefore, the pressure changes by a factor of 2. The initial pressure (p1) is twice the final pressure (p2).
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if light from one star is 15.8 times brighter (has 15.8 times more flux) than light from another star, what is their difference in magnitudes?
The difference in magnitude of the two stars where one star has 15.8 times more flux than the other star is 2.975.
Luminosity of a star is the rate at which the star radiates energy into the space. Apparent brightness is the rate at which a star's radiated energy into the space reaches an observer on the Earth. Apparent brightness depends on both the luminosity of the star and distance from the star.
Difference in magnitude of stars in terms of luminosity is given by
m₂ - m₁ = -2.5 log (I₂/ I₁)
m₂ - m₁ = -2.5 log (1/ 15.8)
m₂ - m₁ = -2.5(log 1 - log 15.8)
m₂ - m₁ = -2.5 (0 - 1.19)
m₂ - m₁ = -2.5 (-1.19)
m₂ - m₁ = -2.5 × -1.19
m₂ - m₁ = 2.975
Therefore, the difference in magnitude of the two stars is 2.975.
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Physics
1. A car travels from a stopped position to a velocity of 88 miles per hour east in a time of 6 seconds. Determine the acceleration of the car.
2. airplane is moving across the sky at a constant speed of 350 miles per hour at an altitude of 20,000 feet.
a) Make a model (picture or diagram) explaining the forces working on the plane as it moves across the sky.
b)Explain why the plane does not move towards the surface of the earth.
c) If the speed of the plane slows down to zero, explain what will happen to the plane and why?
3. Determine which of the following is has the fastest speed:
A cat with a speed of 4m/s or a dog running with a speed of 3.5 km/hr.
4. A student travels from Angeles to New York city. If his watch says 12:15 pm at tale off from Los Angeles and lands in
New York at 3:45 pm. The distance travelled is 3,450 kilometers. Determine the average speed of the plane in m/s.
Answer:
sorry i am late
Explanation:
To determine the acceleration of the car, we can use the formula: acceleration = (final velocity - initial velocity) / time. In this case, the initial velocity is 0 (the car is stopped), the final velocity is 88 mph, and the time is 6 seconds. So: acceleration = (88 - 0) / 6 = 14.67 mph/s.
a) The forces working on the plane as it moves across the sky include thrust from the engines, lift generated by the wings, weight (or gravity), and drag (air resistance).
b) The plane does not move towards the surface of the earth because the lift generated by the wings is greater than the weight (or gravity) pulling the plane down.
c) If the speed of the plane slows down to zero, the plane will begin to fall towards the surface of the earth. This is because the lift generated by the wings depends on the speed of the plane and at zero speed, there is no lift to counteract the weight of the plane.
To determine which of the two options has the fastest speed, we need to convert the speed of the dog to m/s. 3.5 km/hr is equivalent to 0.978 m/s. Therefore, the cat (with a speed of 4 m/s) is faster than the dog.
To determine the average speed of the plane, we can use the formula: average speed = distance traveled / time taken. The distance traveled is 3,450 kilometers, and the time taken is 3 hours and 30 minutes (or 3.5 hours in decimal form). So: average speed = 3,450 / 3.5 = 985.71 km/h. To convert this to m/s, we can multiply by 1000/3600 = 0.277 m/s. So the average speed of the plane is 0.277 m/s
On a cello the 0.68 m long strings are turned by winding one end around a peg or fret. For a peg diameter of 15mm, calculate how many turns will be necessary to achieve a tension in the 1.36 mm diameter string of 84 N (approximately middle G)
The number of turns turned by winding around a peg are calculated to be 0.003.
Extension δ is given by the formula,
δ = εL = σL/E = FL/AE
where, F is force
L is length
A is area
E is modulus of elasticity
⇒ (84 × 0.68)/[π(1.36 × 10⁻³)²/4](210 × 10⁹) = 0.00019 m
And this is wrapped around the peg's circumference,
Number of turns n = 0.00019/π d = 0.00019/π(15 × 10⁻³) = 0.003 times or about 1.4 degrees.
The peg needs to be turned 1.4 degrees.
Thus, the number of turns turned by winding around a peg are calculated to be 0.003.
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