The kinetic energy of Karine Dubouchet of France is 99600, her mass was 51kg. So, her speed at that time will be 62.49m/s.
What is Kinetic energy?Kinetic energy is the energy which is present in the body of an object which is under motion. This energy is converted into potential energy when the object comes at rest. The SI unit of Kinetic energy is Joules (J). It is directly proportional to the mass and velocity of the object.
KE = 1/2 × m × v²
where, KE = Kinetic energy of the body,
m = mass of the body,
v = velocity of the body
Here, the Kinetic Energy is 99600 Joules and mass is 51 kg. Therefore, the speed or velocity of the object can be calculated as:
KE = 1/2 × m × v²
2KE/m = v²
√2KE/m = v
√2×99600/51 = v
√199,200/51 = v
√3,905.9 = v
v = 62.49m/s
Therefore, the speed or velocity of Karine Dubouchet is 62.49m/s.
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the gravity of the moon is about 1/6 that of the earth. for example, an astronaut weighing 180 pounds on the earth would weigh about 30 pounds on the moon. if you were to double the distance between the earth and the moon, how much would our 180 pound astronaut weigh on the moon?
The Moon's gravity is roughly 1/6 that of the Earth's. An astronaut who weighs 180 pounds on Earth would weigh roughly 30 pounds on the Moon, for instance.
What would the astronaut's acceleration be as a result of Earth's gravity?For instance, the astronauts on the International Space Station are located around 400 kilometers (250 miles) above the Earth's surface. The acceleration caused by Earth's gravity is just slightly less at their elevation than it is at the surface of the planet: 8.7 m/s2 as opposed to 9.8 m/s2, a decrease of only around 12%.
Why is it that an astronaut in a space station 300 kilometers above the earth's surface is weightless?(B) An astronaut in space does experience weightlessness because the force of gravity cannot be resisted by a ground or normal force. The astronaut is thus falling. The astronaut, however, falls continually around the Planet rather than colliding with it since they are both going extremely quickly.
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sound travels at 343m/s in the air. what distance from the student, in meters, is the lightning strike?
In order to determine the distance from the student that the lightning strike occurred, you would need additional information, such as the time it took for the sound of the strike to reach the student. Without that information, it is not possible to calculate the distance of the lightning strike.
This can be calculated by dividing the distance (speed of sound x time) by the speed of sound, which is 343m/s. Once the time is known, the distance can be calculated by multiplying the time by the speed of the sound. It is not possible to determine the distance from the student to the lightning strike.
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A proton and an alpha particle are momentarily at
rest at a distance y from each other. They then
begin to move apart. Find the speed of the proton
by the time the distance between the proton and
the alpha particle doubles.
Both particles are positively charged. The charge
and the mass of the proton are, respectively, e and
m. The charge and the mass of the alpha particle
are, respectively, 2e and 4m.
Find the speed of the proton (Ur )p by the time the distance between the particles doubles. Express your answer in terms of some or all of the quantities e, m, r, and ε
A proton and an alpha particle are momentarily at
rest at a distance y from each other. They then
begin to move ap
the speed of the proton (Ur )p by the time the distance between the particles doubles is (e / (m * y)) * √(2/πε)
The speed of the proton can be found by using the conservation of mechanical energy. The initial potential energy between the proton and the alpha particle is given by: Ui = (1/4πε) * (2e * e)/y. As the distance between the particles doubles, the final potential energy is given by: Uf = (1/4πε) * (2e * e)/(2y) Using the conservation of mechanical energy, we can write:Ui + Ki = Uf + Kf Where Ki is the initial kinetic energy and Kf is the final kinetic energy. Since the particles are momentarily at rest, Ki = 0. Also, Kf = (1/2) * m * Ur^2. where Ur is the speed of the proton. We can substitute these values into the equation for the conservation of mechanical energy:(1/4πε) * (2e * e)/y = (1/2) * m * Ur^2 + (1/4πε) * (2e * e)/(2y) Solving for Ur, we get: Ur = (e / (m * y)) * √(2/πε). This is the final velocity of the proton when the distance between the proton and the alpha particle doubles.
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An object that is in simple harmonic motion is restored to its equilibrium position due to a force that is proportional to which quantity?tensionvelocitydisplacementperiod
Answer:
F = - K X describes the restoring force for SHM
The restoring force is proportional to "displacement"
what is the ideal banking angle (in degrees) for a gentle turn of 1.90 km radius on a highway with a 105 km/h speed limit (about 65 mi/h), assuming everyone travels at the limit?
The ideal banking angle for a gentle turn of 1.90 km radius on a highway with a 105 km/h speed limit (about 65 mi/h) should be around 2.62 degrees.
What is banking angle?
Banking angle is an angle of a banked turn or curve on a road, track, or other surface. It is the angle at which the inside edge of the curve is raised above the surface, allowing the vehicle to turn more safely.
Banking angle is important to ensure vehicles can maintain traction while turning, as it helps to reduce the effect of centrifugal force on the vehicle and its passengers. Banking angle is also used to reduce the effects of gravity, which can cause the vehicle to lose control in a turn. Banking angle can range from 0° for a flat surface to a maximum of 60° for high speed curves.
105 km/h = 29.2 m/s
1.90 km = 1900 m
Ideal banking angle is given by
tan θ = v²/rg
tan θ = (29.2)²/(1900)(9.8)
tan θ = 0.045792
θ = tan⁻¹( 0.045792)
θ = 2.62°
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a truck is driving over a scale at a weight station. when the front wheels drive over the scale, the scale reads 5800 n. when the rear wheels drive over the scale, it reads 6500 n. the distance between the front and rear wheels is 3.20 m determine the distance between the front wheels and the truck's center of gravity. group of answer choices 1.69 m 1.50 m 1.59 m 1.72 m
Over a scale at a weight station, a truck is moving. The scale reads 5800 n when the front displacement wheels cross it; 3.20 meters separate the front and rear wheels when the rear wheels cross the scale.
What does physics mean by displacement?
The term "displacement" refers to a shift in an object's position. It is a vector quantity with a magnitude and direction. It looks like an arrow that leads from the beginning position to the ending place.
What is referred to as displacement?
When an atom or group of atoms in a molecule are replaced by another atom, this is referred to as a displacement reaction. For instance, iron replaces copper in a copper sulphate solution when it is introduced.
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in a coulomb force experiment, a student determines that the force between two equally charged spheres is 300 nn when the centers are separated by 20 mm. what is the:
The charge is equal to the Q= 1.3×10^-4 c. Electric charge is the property of matter that causes it to experience a force when subjected to an electromagnetic field.
A force is what?In science, "force" refers to a certain concept. At this point, describing a force as a push or a draw is quite acceptable. It's incorrect to say that a thing "has in it" or "contains" the force. A force is experienced by one thing from another. The concept of a force makes no distinction between living creatures and inanimate objects.
Coulomb's law is what kind of force?Coulomb's inverse-square law, also referred to as Coulomb's law, is an experimental scientific concept that calculates the force between two stationary electrically charged particles. The electric force that exists between two charged objects at rest is known by the terms electrostatic force and Coulomb force.
F = (k ×Q1× Q2)/r^2
F = 300 N
r = 20 m
k = 8.987× 10^8 Nm^2/c^2
given Q1 =Q2 = Q
300= (8.987× 10^8× 2Q)/400
Q= 1.3×10^-4 c
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Mg^12 O^8
-write down the electron structure
-Draw the atom
-write the molecule formula of the compound and give its name!
Answer:
Writing Electron Configurations. When writing an electron configuration, first write the energy level (the period), then the subshell to be filled and the superscript, which is the number of electrons in that subshell. The total number of electrons is the atomic number, Z
a ball starts from rest and rolls down a hill with uniform acceleration, traveling 200 m during the second 5.0 s of its motion. how far did it roll during the first 5.0 s of motion?
An object moving at a constant pace travels 5 meters in the first second; thus, it travels 45 meters in the third second.
In simple terms, what can the acceleration mean?The measurement of such a change in the speed called acceleration. Acceleration frequently, though not always, denotes a shift in speed. A thing that moves in a circle at a constant speed has still been moving forward since the direction of the motion is changing.
Calculation
the object starts from rest i.e. initial velocity, u = 0
and have uniform acceleration.
S = 5m and t = 1s
According to the formula of distance,
S = ut + 1/2 at²
5 = 0×1 + 1/2 a×1²
5 = 1/2a
a = 10m/s²
again, t = 3s
now, v = u + at
v = 0 + 10×3
v= 30m/s
Now, 2aS = v²-u²
2aS = 30²-0
2×10×S = 900
S= 900/20 = 90/2
S = 45m
Thus, the distance traveled by the body in 3rd second is 45m .
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give an example of something we think of as work in everyday circumstances that is not work in the scientific sense. is energy transferred or changed in form in your example? if so, explain how this is accomplished without doing work.
To raise my grade in mathematics, I am working diligently, although this is not research in the traditional sense. In this illustration, the person is expending mental energy to study arithmetic, but no practical labor
What energy has the greatest strength?Unquestionably, nuclear energy seems to have the largest nameplate capacity compared to any other source of energy.
What energizes you?According to biology, the food we consume gives our bodies energy. Carbohydrates, lipids, & proteins are the three fuel types from which this energy is derived. Your body metabolizes the food you consume and absorbs this into your blood so that your cells may use it as fuel.
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4. A box rests on a horizontal, frictionless surface. A girl pushes on the box with a force of 18 N to the right and a boy pushes on the box with a force of 12 N to the left.The box moves 4.0 m to the right. Find the work done by (a) the girl, (b) the boy, and (c) the net force
A box rests on a horizontal, frictionless surface. A girl pushes on the box with a force of 18 N to the right and a boy pushes on the box with a force of 12 N to the left. The box moves 4.0 m to the right. Find the work done by (a) the girl, (b) the boy, and (c) the net force.
Explanation:
Find the work done by (a) the girl, (b) the boy, and (c) the net force.
a-b=c
18 N - 12 N = Net Force 6
The answer to Net Force of 6 to the right
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if a force of 20 n is required to extend a spring 4 cm longer than its natural length, how much work is done to extend it that far?
The work needed to extend its far is 80.
What is Work?
When an object is moved over a distance by an external force, at least a portion of that force must be applied in the direction of the displacement.
This is known as work in physics. By multiplying the length of the path by the component of the force acting along the path, work can be calculated if the force is constant.
The work W is equal to the force f times the distance d, or W = fd, to mathematically describe this idea. The work is W = fd cos if the force is applied at an angle of to the displacement.
Therefore, The work needed to extend its far is 80.
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what is the maximum displacement after one time constant has elapsed in terms of the initial amplitude,
The highest deviation of the item from equilibrium, measured either in the positive or negative x-direction, is called the oscillation's amplitude, or A.
When the velocity reaches zero, the maximum displacement happens. (Why? You have the option of thinking physically or mathematically.) Additionally, the derivative of the velocity with respect to time is the acceleration. x(t) equals A cos(t + a).
The highest deviation of the item from equilibrium, measured either in the positive or negative x-direction, is called the oscillation's amplitude, or A. Repetitive harmonic motion is simple. The length of time (period T) required for an object to complete one oscillation and return to its initial position
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A typical chest X-ray uses X-rays with an RBE of 0.85.
If the radiation dosage is 35 mrem, find the energy absorbed by a 72 -kgpatient, assuming one-quarter of the patient's body is exposed to the X-rays.
The energy absorbed by a 72 -kg patient, assuming one-quarter of the patient's body is exposed to the X-rays is found to be 7.38 x 10^-4 J.
What does radiation absorbed dosage mean?The amount of energy that is deposited in tissue as a result of exposure to ionising radiation is known as the absorbed dose and is measured in joules (J) per kilogramme (kg). The effective dose, which is a weighted average of the equivalent dosage to each organ depending on its radiosensitivity, can be used to quantify the population's risk of stochastic consequences owing to radiation exposure.
RBE = 0.85.
radiation dosage = 35 mrem = 35 x 10^-6 rem.
Absorbed dose => dose / RBE;
=> 35 x 10^-6/ 0.85
=> 4.1 x 10^-5 J/Kg
Mass => 1/4 x 72Kg => 18Kg
hence, absorbed dose => 4.1 x 10^-5 J/Kg x 18Kg
=> 7.38 x 10^-4 J
Explain what is radiation?Energy that emanates from a source and moves through space at the speed of light is referred to as radiation. In addition to having wave-like attributes, this energy is enclosed by an electric field and a magnetic field. Radiation might also be alluded to as "electromagnetic waves."
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The change in sea level due to tides are primarily the result of ?
1. earth's rotation and revolution around the sun
2. the moon's rotation
3. the earth's rotation and the moon's revolution
4.the earth's elliptical orbit
According to the question, The change in sea level due to tides which are primarily the result of the Earth's rotation and Moon's revolution.
What triggers a tide?Ocean waves called tides go great distances. They result from the earth's gravitational pull from the moon and, to a slightly lesser degree, the sun. A shore encounters a tide when the wave's highest point, or the topping, reaches it.
What are waves and tides?Tides are extremely long-period waves that travel across the water as a result of the moon's and the sun's gravitational pull. The rise and decline of the sea's surface on a regular basis is what tides, which originate in the ocean, appear as as they move toward the coastlines.
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a 300 kg mass is moving to the right at a velocity of 20 m/s. all of a sudden (for no explicable reason) the mass of the object triples. what happens to the velocity?
If mass of an object become three times of its initial mass then velocity of the object reduced and has value 11.547 m/s in order to conserve kinetic energy.
What is kinetic energy?Kinetic energy is a type of energy that is present in a particle or object in motion. When work, which includes the transfer of energy was done on an object by applying a net force, that object acquired kinetic energy.
Case 1 -
Mass of object (m1) = 300
velocity of object (v1) = 20 m/s
Kinetic energy = 1/2 m × v²
Kinetic energy = 1/2 × 300 × 20²
Kinetic energy = 60000 J
Case 2 -
Mass of object (m2) = 3 × 300
= 900 m/s
velocity of object (v2) = v2 m/s
Kinetic energy = 1/2 m × v²
60000 = 1/2 × 900 × v²
133.33 = v²
v = 11.547 m/s
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A container of volume 0.4 m3 contains 3 mol of argon gas at 300C. Assuming argon behaves as an ideal gas, find the total internal energy of the gas?
11223.9J or 11.2239 kJ is the total internal energy of the gas.
What is internal energy?Internal energy, which results from the motion of matter at the molecular level, is a type of energy that exists in all systems. For internal energy, the letter U is used, and the joule is the unit of measurement (J).
As a substance changes from one state or phase to another—from solid to liquid to gas—its internal energy also rises. It is possible to imagine planetary bodies as a fusion of heat engines and heat reservoirs.
The heat engines transform some of the thermal energy stored in the heat reservoirs into different forms of mechanical, electrical, and chemical energy.
The formula for total internal energy of gas is
(3/2)nRT
where n = amount of substance
R = Ideal gas constant
T = temperature
Put the value in the equation
(3/2)nRT
= (3/2)(3)( 8.314)(300)
= 11223.9J
Thus, 11223.9J or 11.2239 kJ is the total total internal energy of the gas.
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The acceleration due to gravity on the Moon is gM. Suppose an astronaut on the Moon drops an object from a height of H. The time it would take the object to reach the Moon’s surface would be TM. The same object is dropped from the same height on Earth, where the acceleration due to gravity is gE. The time it takes the object to reach the Earth’s surface is TE. Which of the following is a correct mathematical relationship for the two times?A. TE = √gE/gM . TM B. TE = √gM/gE . TMC. TE = gE/gM . TM D. TE = gM/gE . TM E. TE = TM
The correct mathematical relationship for the two times is Option B: TE = √gM/gE . TM.
What is gravity?Gravity is a natural phenomenon that causes objects with mass to be attracted to one another. It is one of the four fundamental forces in nature and is responsible for the formation and structure of galaxies, stars, and planets. Gravity is experienced as a force pulling objects towards each other. The strength of gravity depends on the distance between two objects, as well as their masses.
This is because the acceleration due to gravity is inversely proportional to the time taken for an object to fall. The equation for this is:
Time = √2*Distance/Acceleration.
Therefore, if we substitute the values for the Moon and Earth in this equation, we get:
TE = √gM/gE . TM
where gM and gE are the accelerations due to gravity on the Moon and Earth, respectively, and TM and TE are the times taken for the object to reach the Moon's and Earth's surfaces, respectively.
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How long does it take for a short pulse of light to travel from one end of the glass to the other? A beam of light from a monochromatic laser shines into a piece of glass. The glass has thickness L and index of refraction n=1.5. The wavelength of the laser light in vacuum is L/10 and its frequency is f. In this problem, neither the constant c nor its numerical value should appear in any of your answers
Given that there are no obstacles in its path and it is free to move, we understand that the light in this situation moves at the speed of refraction index, which in this instance is n = 1.5. That period of time corresponds to the distance a brief pulse of light must travel to cross the glass from one end to the other.
How would you define refraction in plain English?In physics, refraction is the direction change brought on by a wave's speed change as it passes through one medium and enters another.
In what ways do reflection and refraction differ?When light strikes a material on a plane, it reflects, or returns. Light bends as a result of refraction, which is the process through which light's path changes when it passes through a substance. As a result, this is the primary distinction between the two. Usually, mirrors experience this effect.
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The earth's radius is 6.37×106m; it rotates once every 24 hours.
a.)What is the earth's angular speed?
b.)Viewed from a point above the north pole, is the angular velocity positive or negative?
c.)What is the speed of a point on the equator?
d.)What is the speed of a point on the earth's surface located at 3/4 of the length of the arc between the equator and the pole, measured from equator? (Hint: what is the radius of the circle in which the point moves?)
The radius of the Earth is 6.37X106 m, the earth's angular speed is 7.27X10-5 radian/s, the angular velocity is positive, the speed of a point on the equator is 463 m/s and the speed of a point on the earth’s surface halfway between the equator and the pole is 231.5 m/s.
Given data as per the question,
Radius of the Earth is 6.37×106m
T is 24 hours= 24X3600 = 86400 seconds.
(A) Angular Speed,
ω= 2π /T
2X3.14/86400 = 7.27 X10-5 radian/s
(B) When viewed from the North Pole, Earth's angular speed rotates in an anticlockwise direction. Therefore, the angular velocity is positive.
(C) The speed (v) of a point on the equator is,
ν= r X ω = 6.37 X 106 X 7.27 X 10-5 = 463 m/s
(D) The speed of a point on the earth’s surface halfway between the equator and the pole is,
ν= r/2 X ω = 463 /2 = 231.5 m/s.
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a material undergoes an isochoric process that is also adiabatic. is the internal energy of the material at the end of the process greater than, less than, or the same as it was at the start? justify your answer.
There is no heat transmission during an adiabatic process. In an adiabatic process, the link between work as well as the change in interior energy is known as work done.
What makes work what it is?Physics' definition of work makes clear how it is related to energy: anytime work is performed, energy is transferred. Work is the result of the portion of the force acting in the displacement's direction and its magnitude.
Calculation
In the case of an adiabatic process heat transfer is zero ( Q = 0 ), so internal energy is equal to the Work done.
According to the 1st law of Thermodynamics;
Q= ΔU + W
In an adiabatic process: Q= 0
So,
ΔU= -W
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A marble is launched at a speed of 9 m/s at an angle of 25° above the horizontal. If the experiment is done on a level floor, then how far away will the marble land if friction is neglected? SHOW WORK.
A. 1.58 m
B. 3.16 m
C. 6.33 m
D. 6.98 m
If a marble is launched at a speed of 9 m/s at an angle of 25° above the horizontal. If the experiment is done on a level floor, then The distance that the marble will land if friction is neglected is: C. 6.33 m.
How to find the distance the marble will land if friction is neglected?Given data:
Speed = 9m/s
Angle = 25°
Now let find the distance the marble will land if friction is neglected
Range = v² sin(25 × 2)/g
Range = (9 m/s)² × sin 50 / g
Range =(81 m/s² × 0.766044) / 9.8 m/s²
Range = 62.049564 m/s² / 9.8 m/s²
Range = 6.3315m
Range = 6.332 m (Approximately)
Therefore we can conclude that the correct option is C.
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When a science teacher talks about a machine’s efficiency, what is she comparing?
-----------------------------------
A. the useful energy put out by the machine and the energy put into the machine
B. the non-useful energy put out by the machine and the energy put into the machine
C. the thermal energy put out by the machine and the energy put into the machine
D. the non-useful energy put out by the machine and the useful energy put out by the machine
-------------------------------------------------------------------------------------------------------
Mechanics use a pulley to lift an engine out of a car. How could they make the pulley more efficient?
-----------------------------------
A. clean and oil the pulley’s axle
B. use a longer rope or cable
C. raise the pulley’s wheel
D. lower the pulley’s wheel
(1) When a science teacher talks about a machine’s efficiency, she is comparing the useful energy put out by the machine and the energy put into the machine. (option A ).
(2) The pulley could be made more efficient by using a longer rope or cable. ( option B ).
What is efficiency of a machine?
The efficiency of a machine is defined as the ratio of output work to input work. Efficiency of a machine describes how a machine converts input energy or force into useful work or energy.
Mathematically, the formula for the efficiency of a machine is given as;
Eff = ( output force / input force ) x 100%
Eff = ( effort x distance moved by effort ) / ( load x distance moved by load ) x 100%
Thus, by increasing the distance travelled by the effort, the efficiency of the pulley or machine will be increased.
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The illumination lights in an operating room use a converging mirror to focus an image of a bright lamp onto the surgical site. One such light has a mirror with a focal length of 15 cm. If the patient is 1.0m from the mirror, where should the lamp be placed relative to the mirror?
According to the question: The lamp should be placed 11 cm from the mirror.
What is mirror?Mirror is an object which reflects light in such a way that images of nearby objects are visible. It is a surface which can reflect light in an exact way. Mirrors are used for various purposes like for making up, for decorating a room, for security purposes, and also for various scientific experiments. Mirrors are usually made up of two pieces of glass which are either flat or curved with a reflective coating on one side.
This coating is usually made up of metal, such as silver, and is highly reflective. Mirrors can also be made up of other materials such as plastic and other metals. By reflecting light, mirrors can help to create illusions and also create an optical illusion.
This is because the distance between the mirror and the lamp should be equal to the sum of the focal length of the mirror (15 cm) and the distance between the patient and the mirror (1.0 m). Therefore, the distance between the mirror and the lamp should be 1.0 + 15/100 = 2.15 m.
Use the thin lens equation to solve this
(1/s)+(1/s prime)=(1/f)
You are looking for the s value, which is the lamps distance from the mirror. s prime is the distance to the patient, and f is 10 cm.
(1/s)+(1/1.1)= (1/0.1)
= 11.000001 cm
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a merry-go-round with a moment of inertia equal to and a radius of 2.5 m rotates with negligible friction at 1.70 rad/s. a child initially standing still next to the merry-go-round jumps onto the edge of the platform straight toward the axis of rotation, causing the platform to slow to 1.35 rad/s. what is her mass?
In order to cause the platform to rotate around her mass, m=54.51 kg, a youngster initially standing stationary next to the merry-go-round jumps onto the edge of the platform straight toward the axis of rotation.
Simply put, what is moment of inertia?The moment of inertia gauges an object's resistance to variations in rotational motion. A body's resistance to changes in rotation is measured by the moment of inertia of its cross-section.
What is the purpose of moment of inertia?One of the numerous mass qualities that describes an object's stability and the forces required to change its motion is the moment of inertia (MOI). Stability is a key component in the design and manufacture of air and spacecraft in aeronautical engineering.
Iω₁+0= (I + mR²)ω₂
1230×1.72+0= (1230+m×(2.7)²×1.30)
m= 54.51 kg
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what is the ball’s mass? use rho = 1.2 kg/m3 for the density of air at room temperature.
The ball's mass with a terminal velocity of 28 m/s is found to be 2.54Kg.
What is the terminal velocity?An object falling through a fluid at its greatest speed is said to have reached its terminal velocity. When the combined drag and buoyancy forces are equal to the force of gravity pulling the object downward, it is observed. Since there is no net force exerted on the object, there is no acceleration of the object.
Terminal velocity v = Sqrt(2mg/ρAC)
drag co-effiecient of sphere (ball) C = 0.47
=> Ball's mass m= v2 x ρAC/2g
=> 28^2 x 1.2 x 4 π (6.5 x 10^-2)^2/ 2 x 9.8
=> 2.54Kg
How does drag coefficient work?A dimensionless quantity called the Drag Coefficient (Cd) is used to measure an object's resistance to movement through a fluid. It enables aerodynamics to simulate how shape, inclination, and flow characteristics affect aerodynamic drag
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A 6.5-cm-diameter ball has a terminal speed of 28 m/s. What is the ball's mass? Use ρ=1.2 kg/m3 for the density of air at room temperature.
the speed of individual particle diffusion is influenced by temperature and particle size, not by concentration. the speed of individual particle diffusion is influenced by temperature and particle size, not by concentration. true false
True, the speed of individual particle diffusion is influenced by temperature and particle size, not by concentration.
Prolixity is the tendency of motes to spread out in order to enthrall an available space. feasts and motes in a liquid have a tendency to diffuse from a more concentrated terrain to a lower concentrated terrain. Passive transport is the prolixity of substances across a membrane. This is a robotic process and cellular energy isn't expended. motes will move from where a substance is more concentrated to where it's less concentrated. The rate of prolixity for different substances is affected by membrane permeability.
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what did you observe about the motion of objects during and after collisions? 2. based on the velocity change of each object, what did you infer about the direction of forces during a collision?
When two objects of different masses are subjected to a force of the same strength, the one with less mass will experience a higher change in velocity.
What occurs when two items hit each other?Each object pulls the other when two objects come into contact. Imagine using a bat to strike a softball. The ball is pushed away by the bat when it collides with it. The bat experiences force from the ball as well.
What happens when two moving objects slam into each other?Even if two colliding objects have masses that are very different from one another, they will nevertheless exert equal forces on one another. An object always experiences an impetus and a shift in momentum during a collision. The impulse that an object encounters during a collision is equal to its variation in speed.
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You are pedaling forward on your bike. Which of the following would decrease your acceleration?
A.An increase in your speed
B.An increase in your mass
C.An increase in your applied force
D.A decrease in your mass
An increase in your mass would decrease your acceleration. Therefore, option (B) is correct.
What is acceleration?Acceleration is the rate of change of velocity, and it is calculated as the change in velocity divided by the change in time. It is directly proportional to the force applied and inversely proportional to the mass. According to Newton's second law of motion, the force applied to an object is equal to the mass of the object multiplied by its acceleration (F = ma).
Therefore, if the mass of an object increases, the force required to accelerate it also increases and the acceleration decreases. However, an increase in speed is not directly related to acceleration, if you are already at a steady state (constant velocity) an increase in speed won't affect acceleration. Also a decrease in mass will increase acceleration.
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a satellite is currently orbiting earth in a circular orbit of radius r; its kinetic energy is k1. if the satellite is moved and enters a new circular orbit of radius 2r, what will be its kinetic energy?
The kinetic energy of the satellite when it has been moved and it enters a new circular orbit of radius 2r is K₁/2.
Centripetal force is equal to mass times velocity squared over radius (Fc = mv²/r). Gravity is equal to gravitational constant times the product of masses of two objects over distance squared (Fg = GMm/r²). The centripetal force on the satellite is provided by the gravitational pull by the earth, so Fc = Fg.
Kinetic energy, the energy acquired by a moving object, is equal to one half of a mass times velocity squared (K = mv²/2).
Fc = Fg gives the equation mv²/2 = GMm/2r. As you can see, the kinetic energy K of the satellite is inversely proportional to radius or distance r. Therefore, K decreases by a factor of 2 when r increases by a factor of 2, and K₁/2 = 2r.
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