"The work done in pushing a TV set a distance of 2 m with an average force of 20 N is calculated to be 40 J."
The force used to move an object a specific distance is referred to as work in physics. It is determined by multiplying the force times the distance. It is the transfer of energy that occurs during movement.
Mathematically, W = F × s
Given that,
Distance in pushing a TV set = 2 m
Average force = 20 N
Work done while pushing a TV set = ?
Putting the above given values, we have,
W = F × s = 20 × 2 = 40 N-m = 40 J
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If a simple pendulum oscillates with small amplitude and its length is doubled, what happens to the frequency of its motion? It doubles. It becomes squareroot 2 times as large. It becomes half as large. It becomes 1/squareroot 2 times as large. It remains the same.
Answer: It becomes [tex]\frac{1}{\sqrt{2} }[/tex] times the original.
Explanation:
Frequency (f)
Length (l)
Gravitational acceleration (g)
f=[tex]\frac{1}{2\pi }[/tex][tex]\sqrt{\frac{g}{l} }[/tex]
Therefore f is indirectly proportional to [tex]\sqrt{l}[/tex].
So, when the length is doubled the frequency becomes [tex]\frac{1}{\sqrt{2} }[/tex] times the original frequency.
a 2 kg block starts at rest and is slides down a ramp from a height of 3 meters above the ground and reaches the ground with a kinetic energy of 50 j. determine the total work done by friction on the block as it slides down the ramp and explain what has happened to some of the gravitational potential energy
The total work done by friction on the block (2 kg block starts at rest and is slides down a ramp from a height of 3.0 meters above the ground and reaches the ground with a kinetic energy of 50 J) as it slides down the ramp = 44 J (option 4)
When an external force is applied to a system in a such that one of the components of the force is parallel to the displacement of the system, mechanical energy—the sum of kinetic and potential energy—is transported into or out of the system. Work is the term for the activity of transferring energy.
The change in the block's mechanical energy is what is known as the work done by friction;
ΔME = W
KE - PE = W
(50 - (2 x 3) = W
W = 50 - 6
= 44 J
The question is incomplete, it should be:
A 2.0-kilogram block sliding down a ramp from a height of 3.0 meters above the ground reaches the ground with a kinetic energy of 50 Joules. The total work done by friction on the block as it slides down the ramp is approximately
(1) 6 J
(2) 9 J
(3) 18 J
(4) 44 J
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the temperature of the surface of the sun is 5800 k. what would be the surface temperature of a star that emits twice the energy flux (watts per square meter) that the sun emits?
The surface temperature of a star that emits twice the energy flux of the Sun would be 6900k.
What is energy?
Energy is the ability to do work. It can be found in a variety of forms, including thermal energy, kinetic energy, chemical energy, electrical energy, sound energy, and light energy. All of these forms of energy can be converted into other forms. Thermal energy is energy from heat, such as energy from a fire or from the sun.
Kinetic energy is the energy of movement, such as energy from a moving vehicle. Chemical energy is the energy stored in chemical bonds between atoms in a molecule. Electrical energy is energy from the movement of electrons, such as energy from a battery.
Given data:
Sun's temperature(Tsun) = 5800K
Energy flux of a star(Jstar) = 2J
Since,
Jstar/Jsun = T4sun/T4star
= 2 = (Tsun/Tstar)4
Tstar = T(2)[tex]^{1/4}[/tex]
= 5800 × 1.1897
= 6900k
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The particles of a substance can have kinetic energy (KE) and potential
energy (PE). Which equation best summarizes the internal energy (U) of the
substance?
A. U = KEtranslation + KEvibration + KErotation - PEintermolecular forces
B. U= PEtranslation + PEvibration + PErotation + KEintermolecular forces
C. U = KEtranslation + KEvibration + KErotation + PEintermolecular forces
D. U= PEtranslation + PEvibration + PErotation - KEintermolecular forces
The equation that best summarizes the internal energy (U) of a substance that has both kinetic and potential energy is
U = Σ(KEn) + Σ(PEn).
What is Internal energy ?A substance's internal energy is the sum of the kinetic and potential energies of all of its constituent particles.
This inquiry asks if a substance's particles can contain both kinetic energy (KE) and potential energy (PE).
This means that the internal energy is the sum of the kinetic energy and potential energy of all the particles in the substance.
Therefore, equation that best summarizes the internal energy (U) of a substance that has both kinetic and potential energy is U = Σ(KEn) + Σ(PEn).
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The collision between a hammer and a nail can be considered to be approximately elastic. Estimate the kinetic energy acquired by a 11.5 g nail when it is struck by a 557 g hammer moving with a speed of 4.36 m/s.
The kinetic energy acquired by the nail is: 91.5 J.
What is kinetic energy?Kinetic energy is a form of energy that is associated with the motion of an object. It is the energy of a body or a system due to its motion. It is represented by the symbol K and is calculated by multiplying half of the object's mass with its velocity squared. Kinetic energy is always greater than zero and is equal to the amount of work needed to accelerate the body from its initial velocity to its final velocity.
The kinetic energy acquired by the nail when it is struck by the hammer can be estimated using the equation
KE = (1/2) mv^2
where m is the mass of the nail and v is the speed of the hammer.
In this case, m = 11.5 g and v = 4.36 m/s.
Therefore, the kinetic energy acquired by the nail is:
KE = (1/2) * 11.5 g * (4.36 m/s)^2
= 91.5 J.
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Suppose the albedo of a planet is measured to be 40 percent. This means that: 40 percent of the Sun's energy is absorbed. 40 percent of the Sun's energy is reflected. 60 percent of the Sun's energy is reflected. more energy is reflected than absorbed.
If the albedo of a planet is 40% then it means that 40% of the sun's energy is reflected by the planet.
Albedo of a planet is the amount of solar energy that is reflected by a planet of surface. This term is used in astronomy to describe the reflective properties of a planet, satellite, or asteroids. Venus planet has the highest albedo in our solar system, which is 0.7 as a ratio of the light strikes the surface of the planet to the light reflected by the planet. Venus reflect 70% of the sunlight.
Albedo can be measured using a pyranometer device or satellite imagery, which detects the solar radiation of shorter wavelength in the form of watts per square meter (W/sq m).
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angular and linear speeds the circular blade on a saw rotates at 5000 revolutions per minute. (a) find the angular speed of the blade in radians per minute. (b) the blade has a diameter of inches. find the linear speed of a blade tip.
The angular speed of the blade in radians per minute is 31,416 rad/min. angular and linear speeds the circular blade on a saw rotates at 5000 revolutions per minute.
With diameter and linear speed, how do you calculate angular speed?If r is an object's radius, v is its linear speed and is its angular velocity in radians per unit of time, then v = r. This formula connects these three values so that we can always determine the third if we know the first two.
What is the linear speed formula?Thus, the angular speed times the r-dimensional distance equals the linear speed of a point on the object. The unit of measurement is meters per second and meters per second. where = the rate in radians per second.
(a) To find the angular speed of the blade in radians per minute, we can use the formula:
angular speed (rad/min) = 2 * pi * (revolutions per minute)
angular speed (rad/min) = 2 * pi * 5000 revolutions per minute
= 31,416 rad/min
(b) To find the linear speed of a blade tip, we can use the formula:
linear speed (inches/min) = (diameter of the blade) * (angular speed (rad/min))
linear speed (inches/min) = (diameter) * (angular speed (rad/min))
= (diameter) * (31,416 rad/min)
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Rank the following ionic compounds by the magnitude of their lattice energy. Rank from highest to lowest magnitude of lattice energy. Highest magnitude to Lowest Magnitude LiCl, MgO, Na2O, BeO, Na2s b) Given the following thermodynamic data, calculate the lattice energy of CaBr2(s). Term Value (kJ/mol) delta H degree f[CaBr2(s)] -675 delta H degree f[Ca(g)] 179 delta H degree f[Br(g)] 112 I1(Ca) 590. I2(Ca) 1145 E(Br) -325 Express your answer as an integer, and include the appropriate units.
BeO, MgO, Na2O, Na2S, and LiCl are the ionic compounds in order of something like the magnitude of intrinsic lattice energy.
What is an example of magnitude?Because something's size indicates its magnitude. For example, a car moves faster than a cyclist in the sense of speed. In this instance, the speed differential between truck and indeed the bike is higher. By expressing an entity's true or approximative size of direction of movement, it creates the impression that the thing is moving.
In what unit is the magnitude expressed?In order to depict the power of a force, units are created by multiplying mass times breadth times time squared. The thomas (N), which is comparable to one kilograms equals one meters across one square metre, is the most commonly used unit of metric measurements.
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19. which experimental evidence most clearly supports the suggestion that electrons have wave properties?
To give the experimental proof for matter's wave particle duality electron diffraction studies conducted by G.P. Thomson in 1926 and C. Davisson and L. H. Germen in 1927 verified the correctness of de Broglie's hypothesis.
Early research on the characteristics of electrons did not indicate that any unique behavior should be anticipated. Everything suggested that the electron is a very modest mass particle. In a tool like a Wilson cloud chamber, the electron's path may be tracked. Similar to this, an obstruction put in the path of an electron beam created by running current between two electrodes in a glass tube with partial air evacuation will cause the electron beam to cast the shadow of the object.
The determination of the electron's mass and charge, in addition, provided additional proof of its nature as a particle. De Broglie made the recommendation to do the electron diffraction experiment. De Broglie predicted a connection between the "particle" and "wave" aspects of light in 1923. If there are particles in a stream like light, they must have momentum.
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Suppose that the Sun were to collapse under its own gravitational pull. To what radius would it have to be reduced in order for the escape velocity to be equal the speed of light, 3.00×10^8 m/s? The mass of the Sun is 2.00×10^30 kg and G = 6.67×10^−11 N⋅m^2/kg^2.A) 2.96 kmB) 1.48 kmC) 1.52 kmD) 2.10 kmE) None of the other choices is correct.
The mass of the body, and r is its radius. Plugging in the given values of G, M and v_esc, we get r are 1.48 km.
What is radius?Radius is a straight line extending from the center of a circle to its circumference. It is the distance from the center to any point on the circumference and is also equal to half of the diameter. The radius is a fundamental measurement used in geometry, and it is used to calculate the area and circumference of a circle. It is also used in many other shapes such as ellipses and spheres. In three-dimensional space, the radius of a sphere is the distance from its center to its surface.
The escape velocity of a body can be calculated using the equation v_esc = sqrt((2GM)/r), where G is the gravitational constant, M is the mass of the body, and r is its radius.
Plugging in the given values of G, M and v_esc, we get r = (2GM)/(v_esc^2) = (2*6.67e-11*2.00e30)/(3.00e8)^2 = 1.48 km.
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36kg of a solid was heated from 75°C to 80°c by 337207. Calculate the heat capacity of the solid
Answer:
Heat capacity = (337207 J) / (5°C) = 67440.4 J/°C
Explanation:
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you are on a pier on lake huron. if you jump in and are 10.9 ft below the surface of the water, what is the pressure? assume the atmospheric pressure is 13.9 psi and the density of the water is 61.0 lbm/ft^3.
you are on a pier on lake huron. if you jump in and are 10.9 ft below the surface of the water, what is the pressure? assume the atmospheric pressure is 13.9 psi and the density of the water is 61.0 lbm/ft^3.
Therefore, the total pressure at a depth of 10.9 ft below the surface of the water in Lake Huron is 1461.9 psi + 13.9 psi = 1475.8 psi.
To calculate the pressure at a depth of 10.9 ft below the surface of the water, you would use the formula for pressure due to a fluid: P = ρgh, where P is the pressure, ρ is the density of the fluid, g is the acceleration due to gravity, and h is the height of the fluid above the point of measurement.In this case, the density of the water is 61.0 lbm/ft^3, the acceleration due to gravity is 32.2 ft/s^2. So the pressure at a depth of 10.9 ft is: P = (61.0 lbm/ft^3)(32.2 ft/s^2)(10.9 ft) = 2088.82 lbf/ft^2 or 1461.9 psiIt's important to note that the pressure underwater increases by 1 atmosphere or 14.7 psi (or 14.7 lbf/in^2 or 101,325 Pa) for every 33 ft of depth, this means that you have to add the atmospheric pressure (13.9 psi) to the pressure calculated above. Therefore, the total pressure at a depth of 10.9 ft below the surface of the water in Lake Huron is 1461.9 psi + 13.9 psi = 1475.8 psi.
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you have 9 balls. 1 is heavier than the other 8. using a balance scale, how would you identify the heaviest ball in as few steps as possible?
From the nine total balls, three groups of three balls each should be created. We compare the relative weight of the two groups. It should then be clear which group is heavier.
Because it will either tip the scales or keep them level. The group you excluded is then involved. The most common definition of weight in basic physics textbooks is the gravitational force exerted on a body. The formula W = mg, which stands for weight, object mass, and gravitational acceleration, is widely used to express this. Mass is a physics term for a quantitative measure of inertia, a fundamental property of all matter. It basically refers to the resistance a body of matter shows to a change in speed.
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A hollow spherical conductor, carrying a net charge +Q, has inner radius r1 and outer radius r2=2r1 (see the figure (Figure 1)). At the center of the sphere is a point charge +Q/2. Plot V as a function of r from r=0 to r=2r2. Assume V0=3Q8πϵ0r2.
The graph V as a function of r determines the potential of charge at different radius. This instructs how to estimate the charge-related electric field strength.
What is the hollow sphere's net charge?There won't be any net charge within the Gaussian surface if we suppose any imaginary sphere inside the charged sphere. So, Σq = 0 . So, the net flux is equal to 0. Consequently, a hollow sphere has no electric field inside of it.
Where is the charge on a conducting hollow sphere?The entire charge will be on the periphery of a conducting hollow sphere, and the electric field strength within the conducting sphere will be zero. The entire charge will reside on the shell's outside in the case of a spherical shell, and there will be no interior field as well.
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a 65-kg astronaut pushes against the inside back wall of a 2000-kg spaceship and moves toward the front. her speed increases from 0 to 1.6 m/s. (a) if her push lasts 0.30 s, what is the average force that the astronaut exerts on the wall of the spaceship? (b) if the spaceship was initially at rest, with what speed does it recoil? (c) what was the ob
The average force an astronaut applies to the spacecraft's wall is 346.7 N, or impulse 104.
Is the difference between average and net force?Average force refers to a force that changes over time and is not constant. It provides an more or less typically delivered that can be used to determine the other factors connected to it. On the contrary hand, net force describes all of the forces acting on the object.
Can average force have a negative value?Simply put, yes is the response to the question Can force be negative. A vector quantity, force depends on both its magnitude and its direction. Just the direction is indicated by the negative sign. An object's mass and acceleration are produced by the force.
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A 0.98 kg ball is placed on a vertical 55.71 N/m spring that is compressed 43.14 cm. When the spring is released, how high above its starting point will the ball go?
Answer:
F = - K X
X = .4314 m compression of spring
F = 55.71 N/m * .4314 m = 24.03 N force to compress spring
E = 1/2 K X^2 energy of compressed spring
E = 1/2 55.71 N / m * (.4314 m)^2 = 5.184 Joules energy of spring
1/2 M V^2 = E energy imparted to ball
V = (2 E / M)^1/2 = 3.25 m/s max speed of ball
M g H = 1/2 M V^2 calculate height of ball after release
H = E / (M g) height above spring
H = 5.184 / (.98 * 9.80) = .540 m height to which ball rises
.540 + .4314 = .972 m height above compression point
Michael walked his dog on a leash every morning and afternoon. One morning, his dog saw a squirrel and started to dash after it. Michael held the leash
more firmly and pulled back slightly so the dog could not run after the squirrel.
What is this an example of?
O A First Law of Motion, because an action is stronger than the force
OB. Second Law of Motion, because it is a change in the force and mass
OC. Third Law of Motion, because it is an equal and opposite reaction
O D. Law of Universal Gravitation, because it is a change in inertia
Michael pulled back the leash so that the dog could not run after the squirrel is an example of first law of motion because it is an action which is stronger than the force. Thus, the correct option is A.
What is the first law of motion?Newton's first law of motion is also known as the law of inertia. It states that an object at rest will remain at rest and an object in motion will remain in motion with the same speed and direction unless and until it is acted upon by an unbalanced external force.
An external force can be defined as the change in the mechanical energy of the object which is either the kinetic energy of the object or the potential energy present in an object. These forces are caused through the external agents. Examples of external forces include friction, normal force, and air resistance.
Therefore, the correct option is A.
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T/F When reducing a system of parallel, non-concurrent forces acting on a body to a single resultant force, the line of action (LOA) of the resultant force does not have to pass through the body.
It is true that When reducing a system of parallel, non-concurrent forces acting on a body to a single resultant force, the line of action (LOA) of the resultant force .
What does physics define as a force?IAny action that aims to maintain, modify, or transform a body's motion is considered a force in mechanics. Isaac Newton ’s second laws of motion, which are outlined in his Principia Mathematica, are frequently used to illustrate the concept of force (1687).
Why is force necessary?An immobile body can be made to move. A moving body can either be stopped or slowed down by it.Along altering its size and shape, it can alter the direction of such a moving body as well.
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A wheel with 16 spokes rotating in the clockwise direction is photographed on film, The film is passed through a projector at the rate of 24 frames/s, which is the proper rate for the projector. On the screen, however, the wheel appears to rotate counterclockwise at 4.0 rev/min, Find the smallest possible angular speed at which the wheel was rotating.
The film is projected at 24 frames per second, which is the correct pace for the projector on the screen, yet the wheel appears to move at 4.0 revolutions per minute, which is anticlockwise.
How can I determine the smallest angular speed?The smallest angular velocity is found to be g/R by balancing the centripetal and gravitational forces with the normal reaction. This is how you can determine the smallest angular speed.
What is the minimum speed formula?Calculate the vertical circular motion's radius (in meters) and the centripetal acceleration (in meters per second squared) that gravity causes. Using the, get the object's top-of-the-circle speed, which is its lowest speed.
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A massless spring hangs from the ceiling with a small object attached to its lower end. The object is initially held at rest in a position yi such that the spring is at its rest length. The object is then released from yi and oscillates up and down, with its lowest position being 13 cm below yi.
Oscillation refers to the repetitive motion of an object that periodically returns to a fixed position. It can be described as the motion of an object back and forth around an equilibrium point.
What is Oscillations?Oscillations can be classified into different types based on the restoring force that causes the motion. The most common types of oscillations are harmonic oscillations, which are caused by a restoring force that is proportional to the displacement from the equilibrium point. A massless spring hanging from the ceiling with a small object attached to its lower end is a good example of harmonic oscillation. When the object is displaced from its equilibrium position and released, it will oscillate up and down, with its lowest position being 13 cm below yi.
This is a simple harmonic motion problem. The object oscillates about an equilibrium point, which is at yi. The amplitude of the oscillation is 13 cm, and the restoring force is provided by the spring. The motion can be described by the equation: y(t) = A * cos(2πft + φ), where A is the amplitude, f is the frequency, and φ is the phase constant. The frequency of the oscillation can be calculated using the formula: f = 1 / (2π * sqrt(k/m)), where k is the spring constant and m is the mass of the object.
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a bear spies some honey and it takes off from rest accelerating at a rate of 2.0m/s2. if the honey is 16m away, how fast will his snout be going when the bear reaches the honey?
The bear's snout will be traveling at 32 m/s when it reaches the honey.
What is honey?
Honey is a sweet and viscous liquid produced by bees, as well as other species of insects. It is composed primarily of sugars, but also contains trace amounts of enzymes, minerals, vitamins, and amino acids. It has been used for centuries as a food source and for its medicinal properties.
Honey has been used to treat coughs, colds, digestive issues, and topically to treat wounds, burns, and skin problems. Honey also has antioxidant, anti-inflammatory, and antiseptic properties. Its antibacterial properties make it a popular choice for wound care, and its antifungal properties can help to fight off fungal infections.
The bear's snout will be traveling at 32 m/s when it reaches the honey.
This is because acceleration is the rate of change of velocity,
which means that if an object accelerates at a rate = 2.0 m/s2
its velocity will increase by 2.0 m/s each second.
Therefore, if the bear accelerates at a rate of 2.0 m/s2 for 16 seconds, it will have a velocity of 32 m/s by the end of that time.
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Calculate the adiabatic flame temperature attained when methane at 298k, is combusted (a) with oxygen in the molar ratio air/CH4 = 9.524. Assume that CO2 and H2O are the products of the combustion. The adiabatic flame temperature is that temperature reached if all of the heat of the oxidation reaction is used to increase the temperature of the products of the reaction. Air is 21 molar percent O2 and 79 molar percent N2.
Adiabatic flame temperature of approximately 2300 K or 2027 °C
To calculate the adiabatic flame temperature, we need to know the heat of combustion of the fuel and the specific heat of the products of the combustion.
The heat of combustion of methane (CH4) is -890 kJ/mol. The balanced equation for the combustion of methane with oxygen is:
CH4 + 2O2 -> CO2 + 2H2O + heat
The molar ratio of air/CH4 = 9.524, which means that for every 1 mole of CH4, 9.524 moles of air are used. Since air is 21% O2 and 79% N2, the number of moles of O2 in 9.524 moles of air is (0.21) * (9.524) = 2.00 moles.
The number of moles of CO2 and H2O produced in the combustion of 1 mole of CH4 with 2 moles of O2 is 1 mole and 2 moles respectively
The adiabatic flame temperature is calculated using the equation:
ΔH / (ΔnCp) = ΔT
where ΔH is the heat of combustion of the fuel, Δn is the change in the number of moles of the products, and Cp is the specific heat of the products at constant pressure.
The specific heat of CO2 and H2O are 0.846 and 4.18 J/mol·K respectively.
ΔT = (-890 kJ/mol) / ((1+2) * (0.846 + 2*4.18) J/mol·K)
This gives an adiabatic flame temperature of approximately 2300 K or 2027 °C. This temperature is the highest temperature reached at the flame front when all the heat of combustion is used to raise the temperature of the products and no heat is lost to the surroundings.
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For which of the regions shown in the figure is the observed effect the strongest? Region B Region CThe observed effect is the same for all three regions Region A
A region. Since Region A has the most severe temperatures and the most dramatic changes in temperature over time, the observed effect is largest there.
How does temperature work?
Temperatures describe how hot or cold something is to a specific degree. Both Celsius and Fahrenheit are frequently used units of measurement, with Celsius being the more popular one.
With typical temperatures between -40 and 40 degrees Celsius, temperatures can fluctuate from extremely cold to extremely hot. Numerous variables, such as height, latitude, and closeness to the water, can influence temperature. It is crucial to be aware of the temperature in a specific place before going because various climates might experience drastically varying temperatures.
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Note the complete question could be as bellow,
For which of the regions shown in the figure is the observed effect the strongest? O Region B O Region CO The observed effect is the same for all three regions O Region A
: experiment with other values of strength and freq. to create other examples of standing waves. what values of strength and freq. lead to a standing wave with four nodes? five nodes? describe your results on a separate page.
For a standing wave with four nodes, you need a strength of 2 and a frequency. This creates a wave pattern with two loops, and four areas of minimum displacement.
what is frequency?
Frequency is a measure of how often something occurs, such as a sound wave or a particular event. It is expressed as a number of occurrences per unit time, such as vibrations per second, or as a fraction of the total number of occurrences over a specified interval, such as the proportion of a population that have a particular trait.
Frequency is an important concept in physics, engineering, mathematics, and other sciences. It is used to describe and analyze natural phenomena such as sound, light, and electricity, and to describe and analyze the behavior of systems such as mechanical, chemical, and biological systems.
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a proton p and an electron e are released simultaneously on opposite sides of an evacuated area between large, charged parallel plates, as shown above. each particle is accelerated toward the oppositely charged plate. the particles are far enough apart so that they do not affect each other. which particle has the greater kinetic energy upon reaching the oppositely charged plate?
The preceding statement indicates that neither particle is right because their kinetic energies are equal.
Describe kinetic energy?A particles or a thing that is motion produces some form of energy called kinetic energy. An item accumulates kinetic energy when work, which involves the energy transfer, is made on it by exerting a net force. Explain that a moving object's mass and speed are two elements that impact the amount of kinetic energy it will possess.
Since the same potential difference is causing the acceleration of both particles (e and p), As KE=qV, where q is the same for electrons and protons, both have the same kinetic energy. The answer is (c), thus.
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The complete question is-
A proton p and an electron e are released simultaneously on opposite sides of an evacuated area between large, charged parallel plates, as shown above. Each particle is accelerated toward the oppositely charged plate. The particles are far enough apart so that they do not affect each other. Which particle has the greater kinetic energy upon reaching the oppositely charged plate?
a). The electron.
b). The proton.
c). Neither particle, both kinetic energies are same.
d). It cannot be determined without knowing the amount of charges on the plates.
8.10 an engine of the orbital maneuvering system (oms) on a space shuttle exerts a force of (26,700 n)1 for 3.90 s, exhausting a negligible mass of fuel relative to the 95,000-kg mass of the shut- tle. a) what is the impulse of the force for this 3.90 s? b) what is the shuttle's
The impulse of the force for this 3.90 s is 104130 kg.m/s. the orbital maneuvering system (oms) on a space shuttle exerts a force of (26,700 n)1 for 3.90 s.
What is the impulse of the force?If the force is constant, the resulting force, F, and the length of this force, t, are multiplied to form the impulse of force. Changes in motion and subsequently changes in momentum are caused by the impulse of force.
What do you mean by impulse?a sudden, spontaneous propensity or invitation to some often irrational conduct. an inclination or inherent tendency that is typically illogical. an excitement pulse that travels through tissues, in particular nerve fibers and muscles, and causes physiological activity or inhibition by looking at nerve impulses.
Given:
(a) Force ∑F = 26700 N
Time interval Δt = 3.90 s
The impulse of force J = ∑F.Δt
The impulse of force J = 26700*3.90
The impulse of force J = 104130 Kg.m/s
(b) To find the change in momentum of the shuttle caused by this impulse, we can use the equation:
Δp = mΔv = Impulse
where Δp is the change in momentum, m is the mass of the shuttle (95,000 kg), and Δv is the change in velocity.
By using impulse equation we can find the change in velocity of the shuttle.
Δv = Impulse / m
= 104,130 Ns / 95,000 kg
= 1.096 m/s
You can plug in the value and find the change in velocity of the shuttle
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n general, ? is the ability of the equipment to withstand a certain magnitude of available fault current at a specific voltage in conjunction with an ocpd without becoming a hazard external to its enclosure.
Short Circuit Current Rating(SCCR) is the ability of a certain equipment to withstand a certain magnitude of electric current at a specific voltage during a short circuiting.
Short circuit is that when a neutral wire comes in contact with a current carrying live wire. During short circuiting, the current in the conductor suddenly gets increased due to the very low resistance. We know by Ohm's law that for a constant potential difference(V), the current(I) is inversely proportion to the resistance(R).
V = I/R
So when resistance becomes very low, the current becomes very high causing the spark, or high heat in the wire or the equipment. SCCR is the rating of equipment that can withstand a certain magnitude of current.
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what is the speed uuu of the object at the height of (1/2)hmax(1/2)hmax ? express your answer in terms of vvv and ggg . you may or may not use all of these quantities.
The speed of the object at the height of (1/2)hmax is expressed in terms of vvv and ggg, without using the value of g and h.
What does the word "speed" mean?Speed is what it means. the speed at which an object's location changes in any direction. The distance traveled about relation to the time it took to travel that distance is how speed is defined. Given that it just has a direction and no magnitude, speed is a scalar number.
How can we determined this?The speed of the object at the height of (1/2)hmax can be represented by the equation:
Speed = sqrt(2gh)
Where:
g = acceleration due to gravity
h = height
At the height of (1/2)hmax, the object has reached its maximum height and its speed is at its minimum, known as the "top speed." At this point, the object's vertical velocity (vvv) is equal to zero and its kinetic energy is equal to its potential energy, so we can write:
1/2mvvv^2 = mgh
Where:
m = mass of the object
By substituting the first equation into the second equation, we get:
1/2m(sqrt(2gh))^2 = mgh
Simplifying this equation, we get:
g = vvv^2 / 2h
Now, we can substitute the value of g back into the first equation:
Speed = sqrt(2gh) = sqrt(2 * (vvv^2 / 2h) * (1/2)hmax)
So, the speed of the object at the height of (1/2)hmax is:
Speed = sqrt(vvv^2 / 2)
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An object is projected vertically upwards With a velocity of 200m/s.Calculate:i) It's velocity after 5 seconds
Answer:
v=150m/s
Explanation:
given
u=200m/s
t=5s
g=10m/s^2
required
v=?
solution
v=u-gt
v=200-(10)(5)
v=200-50
v=150m/s
If you want to start a fire using sunlight, which kind of mirror would be most efficient? a concave mirror a plane mirror a convex mirror any type of plane, concave, or convex mirror It is not possible to start a fire using sunlight and a mirror; you must use a convex lens.
The mirror that will be used in the fire extinguisher will be concave mirror.
What is a concave mirror?When the concave mirror is exposed to the sun,all incident rays are converged to the focal point hence, energy radiated is focussed at a single point, hence paper burns, when it is kept at the focal point.
What type of image is formed by concave mirror?The real image formed only due to the concave mirror.this happens only if the object distance is greater than the focal length of the mirror.
real image, inverted image
when the object is placed at center of curvature, Image is formed at center of curvature, Image is inverted, image is real.
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