created when sound is formed from vibrations that cause pressure changes in the surrounding air. it is called by ___
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created when sound is formed from vibrations that cause pressure changes in the surrounding air. it is called a sound wave
Sound is a mechanical wave that results from the back-and-forth vibrations of the particles of the air medium through which the sound wave is moving.
These vibrations in the air are caused by the vibration of the objects that generate the sound. If a sound wave is moving from left to right through the air, then particles of air will be displaced both rightward and leftward as the energy of the sound wave passes through it.
The motion of the particles is parallel to the direction of the energy transport. This is what characterizes sound waves in air as longitudinal waves.
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Related Questions
Sputnik I was launched into orbit around Earth in 1957. It had a perigee (the closest approach to Earth, measured from Earth's center) of 6.41 x 10^6 m and an apogee (the furthest point from Earth's center) of 7.13 x 10^6 m. What was its speed when it was at its perigee
Answers
In 1957, Sputnik I was propelled into orbit around the planet. Its speed when it was at its perigee was was approximately 7.935 x 10^3 m/s.
The speed of an object in orbit around Earth can be calculated using the vis-viva equation:
v = sqrt(GM/(r))
where v is the velocity of the object, G is the gravitational constant, M is the mass of the Earth, and r is the distance of the object from the center of the Earth.
Given the perigee distance of 6.41 x 10^6 m and the mass of the Earth being 5.972 x 10^24 kg, the velocity of Sputnik I at its perigee would be:
v = sqrt((6.67 x 10^-11 N*(m^2)/(kg^2) * (5.972 x 10^24 kg)) / (6.41 x 10^6 m))
v = 7.935 x 10^3 m/s
So, the speed of Sputnik I when it was at its perigee was approximately 7.935 x 10^3 m/s.
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A 50 kg person and a 70 kg person are sitting on a bench close to each other about .5 m apart.
Estimate the magnitude of the gravitational force each exerts on the other.
Answers
Answer:
1.0 x 10-6 N.
Explanation:
The gravitational force
Fg = G m1 m2 / r2 = (6.673 x 10-11) (50 kg) (75 kg) / (0.50 m)2 = 1.0 x 10-6 N.
ethe earth takes 1 day to rotate once about its axis. what is the angular v elocity of a point on the surface of the earth studentroom physics ocr a
Answers
The angular velocity of a point on the surface of the earth is [tex]7.3 * 10^{-5} rad/s[/tex]
What is angular velocity?
Angular velocity is a vector quantity and is described as the rate of change of angular displacement which specifies the angular speed or rotational speed of an object and the axis about which the object is rotating.
What is angular velocity and write its formula?
Angular velocity is the rate of change of the position angle of an object with respect to time, so w = theta / t, where w = angular velocity, theta = position angle, and t = time.
Every point on the earth's surface completes one circular orbit (centered at a point on the axis) in 1 day
1 day = 24x60x60
1 day=86400s
Angular velocity is given by :
[tex]w =2\pi /86400\\ w =7.3*10^{-5} rad/s[/tex]
Thus, [tex]7.3 * 10^{-5} rad/s[/tex] is the correct answer.
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which effect proves more conclusively that an object is charged, attraction to or rep;usion from antoher object
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According to Coulomb's Law the observation of repulsion between two objects provides more conclusive evidence that an object is charged, as opposed to attraction.
What is Coulomb's Law?
Coulomb's Law is a fundamental principle in physics that describes the interaction between electrically charged objects. It states that the force of attraction or repulsion between two charged objects is directly proportional to the product of the charges and inversely proportional to the square of the distance between them.
Attraction or repulsion between two objects is one way to determine if an object is charged. The presence of an electric charge on an object can be determined by observing whether it experiences a force of attraction or repulsion when brought near another charged object.
Attraction or repulsion between two charged objects is a fundamental effect of electric charges. Opposite charges will experience a force of attraction towards each other, while like charges will experience a force of repulsion away from each other. This is known as Coulomb's Law.
Therefore, as per Coulomb's Law the observation of repulsion between two objects provides more conclusive evidence that an object is charged, as opposed to attraction.
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When charging by induction using grounding, if a negative rod is used, the object will acquire a ______ charge
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When a positively charged rod becomes grounded it becomes neutral. The electrons come from the ground to your hand, then from your hand to the rod making the rod become neutral.
What is happening when a negatively charged rod becomes grounded?Both of the charged objects receive the same kind of charge when charging through conduction. Both things acquire a negative charge when a negative object is used to charge a neutral object.
The neutral sphere needs electrons from the negatively charged rod in order to become negative. 3. To demonstrate how charging by contact works, we'll first look at the scenario of charging a neutral needle electroscope with a negatively charged metal spherical.
Understanding the process necessitates an understanding of how like charges resist one another and have a strong desire to spread out as widely as possible in order to lessen their repulsions. The extra electrons in a negatively charged metal sphere repel one another and move as far apart from one another as possible.
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When charging by induction using grounding, if a negative rod is used, the object will acquire a positive charge.
What is charging by induction?A charging technique called induction charging involves charging a thing without actually contacting it to another charged object. The charged particle is held close to an uncharged substance which is conductive also, that is grounded on a neutrally charged material during the charging by induction process.This method of charging involves using a charged object to help a neutral object become charged without actually touching the objects. The neutral or uncharged conductor, which is grounded on a neutrally charged substance, is brought closer to the charged particle. If a charge is transferred between two objects, an oppositely polarized charge will emerge in the uncharged conducting material.
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Measuring 27ml of liquid (daudgtear idnreiyc)?
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Measuring 27ml of liquid using graduated cylinder, it is used to measures the volumes of liquids.
Why would someone use a graduated cylinder?Long, thin vessels called graduated cylinders are used to measure liquid volume. They are not meant to be heated, stirred, or weighed. Graduated cylinders typically come in sizes between 5 and 500 ml. Some of them can even hold volumes greater than one liter.
With your eyes directly level with the liquid, place the graduated cylinder on a flat surface and measure the height of the liquid inside. The liquid will usually slant downward. The term "meniscus" refers to this curve. Read the measurement at the meniscus's bottom at all times.
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A toy elevator is raised from the ground floor to the second floor in 20 seconds. The power needed using 1000 J of work, is
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A toy elevator is raised from the ground floor to the second floor in 20 seconds. The power needed using 1000 J of work, is 50 W, the calculation is like 1000J of work / 20 seconds = 50W.
Power is measured in Watts (W) which is a unit of energy per time. This means that when you divide the total energy (1000J) by time (20 seconds) it will give you the power (50W). In other words, power is the rate at which energy is expended over a given period of time. The higher the power, the faster the elevator will go. In this case, 1000J of work divided by 20 seconds gives you a power of 50W, which is enough to move the elevator from the ground floor to the second floor in 20 seconds.
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Integrated circuits are used in virtually all modern electronic
devices to carry out specific tasks.
TRUE
FALSE
Answers
Answer:
True.
Explanation:
An electric circuit can be defined as an interconnection of electrical components which creates a path for the flow of electric charge (electrons) due to a driving voltage.
Generally, an electric circuit consists of electrical components such as resistors, capacitors, battery, transistors, switches, inductors, etc.
This electrical network which is usually a closed loop comprises of a device that provides the energy (voltage) to drive electrons or electric current; the device is referred to as a source such as a generator or battery.
Similarly, an integrated circuit (IC) also referred to as microchip can be defined as a semiconductor-based electronic component that comprises of many other tiny electronic components such as capacitors, resistors, transistors, and inductors.
Generally, integrated circuits (ICs) are used in virtually all modern electronic devices to carry out specific tasks or functions such as amplification, timer, oscillation, computer memory, microprocessor, etc.
A person jogging from the forest to the office covers the 6,800 meters in 2 hours. Their speed is not constant and they slow down and speed up at various times. What is their average velocity
Answers
The required average velocity of a person jogging from the forest to the office is calculated to be 0.94 m/s.
Given that,
Total displacement = 6800 m
Total time = 2 hrs
Speed is not constant and varies with time.
Let us convert hours to seconds.
2 hours = 2 × 60 minutes = 2 × 60 × 60 seconds = 7200 seconds
The equation for average velocity is known to be,
"Average velocity = Total displacement / Total time"
Putting in the above given values, we have,
Average velocity = 6800/7200 = 0.94 m/s
Thus, the average velocity is calculated to be 0.94 m/s.
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When a motor vehicle strikes a tree while traveling at 40 mph, the unrestrained occupant:
A. is thrust under the steering column onto the floorboard.
B. remains in motion until acted upon by an external force.
C. will decelerate at the same rate as the motor vehicle.
D. will most likely be thrown over the steering column.
Answers
D. will most likely be thrown over the steering column. When an unrestrained occupant is in a motor vehicle that strikes a tree while traveling at 40 mph, the occupant will be thrown from the vehicle due to the force of the impact. Without a seatbelt, the occupant will be thrown forward over the steering column.
When a motor vehicle strikes a tree traveling at 40 mph, the unrestrained occupant will be thrown forward and over the steering column with a force that is greater than the force of the motor vehicle's deceleration. This is due to the fact that the occupant is not restrained and therefore is not held in place by the seatbelt, allowing them to travel at the same speed until acted upon by an external force.
When a motor vehicle strikes a tree traveling at 40 mph, the unrestrained occupant will be thrown forward and over the steering column with a force that is greater than the force of the motor vehicle's deceleration.
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a boy pushes forward a cart of groceries with the total mass of 45kg. What is the acceleration of the cart if the net force on the cart is
Answers
If the net force on the cart is 66.0 N, the acceleration of the cart is 1.46 m/[tex]s^{2}[/tex] .
How do you calculate mass given acceleration and force?The formula used in the second law of motion to explain the connections between force, mass, and acceleration is Mass + acceleration equals force. F = ma Calculating force in Newtons (N), mass in kilograms (kg), and acceleration in meters per second squared (m/s2) may all be done using this formula.
It is show that,
Mass of cart, m = 45 kg
Net force acting on cart, F = 66 N
Let a represent the rate of acceleration of the cart being pushed. Using Newton's second rule of motion, it can be calculated as follows:
F = ma
a = F/m
a = 66 N/45 Kg
a = 1.46 m/[tex]s^{2}[/tex]
So, the acceleration of cart is = 1.46 m/[tex]s^{2}[/tex] .
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The connected bar BC is used to increase the lever arm of the crescent wrench as shown. If a clockwise moment of MA = 120 N·m is needed to tighten the nut at A and the extension d = 300 mm, determine the required force F in order to develop this moment. 15° F 30 300 mm А Probs. 427/28/29
Answers
The value of d is 401.550.
Momentum can be viewed as a body's "power" while it is moving, or the amount of force it can exert on another body. For instance, a baseball (small mass) thrown quickly can have the same momentum as a bowling ball (big mass) going extremely slowly (low velocity) (high velocity).
"The motion of an item equal to the product of its mass and its velocity" is referred to as momentum. When we say anything has momentum, we are referring to its precise mass and direction of motion.
C+ΣMA = ( 200 cos 45) (d cos 30+0-3) -
(200 sin 45°) (d sin 30°)= -120
(200COS 45°) (0.3) + (200 cos 45°) (d cos30) +
(200sin 45') (d sin 30") = 120
d = 120- (200 cos 45) (0.3) / 200 (cos 45 Cos 30+ sin 45 sin 30)
d = 0.40155m
d = 401.55mm
d = 401.550
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Complete Question -
Que fuerza será necesaria aplicar a un cuerpo de 20kg de masa para imprimirle una aceleración a=4m/s²
Answers
Answer:
La fuerza que será necesaria aplicar a un cuerpo de 20kg de masa para imprimirle una aceleración a=4m/s² es 80 N.
Explanation:
La segunda ley de Newton, llamada ley fundamental o principio fundamental de la dinámica, plantea que un cuerpo se acelera si se le aplica una fuerza.
De esta manera, esta ley establece que las aceleraciones que experimenta un cuerpo son proporcionales a las fuerzas que recibe. Dicho de otra forma, la aceleración de un cuerpo es proporcional a la fuerza neta que se le aplica. Cuanto mayor es la fuerza que se le aplica a un objeto con una masa dada, mayor será su aceleración.
La segunda Ley de Newton se expresa matemáticamente como:
F = m*a
Donde:
F es la fuerza neta. Se expresa en Newton (N) m es la masa del cuerpo. Se expresa en kilogramos (Kg.). a es la aceleración que adquiere el cuerpo. Se expresa en metros sobre segundo al cuadrado (m/s²).En este caso:
m= 20 kga= 4 m/s²Reemplazando:
F= 20 kg* 4 m/s²
Resolviendo:
F= 80 N
La fuerza que será necesaria aplicar a un cuerpo de 20kg de masa para imprimirle una aceleración a=4m/s² es 80 N.
Which statement best describes how science is an engineers work together in the research and development cycle
Answers
Answer: Which statement best describes how scientists and engineers work together in the research and development cycle? Scientists develop new technology, and then engineers use it to solve design problems.
Explanation: boom!
21 An antiaircraft shell is fired vertically upward with a muzzle velocity of 1000 ms-¹. Calculate the maximum height it can attain, the time taken to reach this height, the instantaneous velocities at the ends of 20 sec and 50 sec. d. When will its height be 37.5 km? Interprete your result. Neglect air resistance. a. b. C.
Answers
Time
S= 1/2 (u+v)t = 10000= (1000+0)t
t= 100s
V is zero because the particle is projected upwards at maximum height final velocity, v, equals zero
What is the charge Q on the capacitor immediately after the switch is moved to position b?
Express your answer using two significant figures.
Answer must be in microC.
Answers
18 μC is the charge Q on the capacitor immediately after the switch is moved to position b .
The expression for the charge on the capacitor is as follows :
Q = CV
substitute 2.0 μF for C and 9V for V.
Q = (2μF) {[tex]\frac{1 * 10^{-6} F }{1μF}[/tex]} (9V)
= 18 * [tex]10^{-6}[/tex] C
≈ 18 μC
Charge is not stored in capacitors. In reality, capacitors store an unbalanced charge. If a capacitor's one plate has one coulomb of charge stored on it and the other plate has one less, the total charge (added up over both plates) will be zero.
Formula q=CV, where q is the charge stored, C is the capacitance, and V is the applied voltage, describes this relationship.
Always, current flows from -ve to +ve. As a result, charge will move away from the -ve plate and towards the +ve plate. Therefore, the charge on a capacitor always equals the charge on the positive plate, never the negative.
The link between a capacitor's capacitance, its charge, and the voltage across it.
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15. A uniform beam AB of length 100m and weight 20N rests on a supports P and Q placed 20m from each end of the beam. Weights of 50N and 5N are placed at A and B respectively. Calculate the reaction at P and Q.
PLS I BEG SHARP RESPONSE
Answers
Answer:
Peter and John is a plate of rice together peterhead 2/5 of the quantity of rice white drone x 1/3 who ate more food than the other
In the grating equation nλ=d sin θ, the quantity θ will be determined in the lab: Using meter sticks and geometry/trigonometry, using the angular scale on the experimental apparatus, using a protractor.
Answers
In the laboratory, the quantity θ in the grating equation nλ=d sin θ can be determined in several ways.
What is laboratory ?
A laboratory is a specialized facility used to conduct scientific research, experiments, and analysis. Laboratories are typically equipped with instruments, tools, and other equipment necessary for conducting experiments, tests, and analyses. They may also be used to produce and store chemical, biological, or physical samples and materials.
Meter sticks and geometry/trigonometry can be used to measure the lengths of the grating lines, d, and the wavelength of light, λ, and then calculate the angle using the formula θ = sin-1 (nλ/d). The angular scale on the experimental apparatus can also be used to measure the angle directly. Alternatively, a protractor can be used to measure the angle directly.
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Complete Question
In the grating equation nλ=d sin θ, the quantity θ can be determined in the lab by using meter sticks and geometry/trigonometry, using the angular scale on the experimental apparatus, or using a protractor. To determine the value of θ using meter sticks and geometry/trigonometry, the lengths of the grating lines, d, and the wavelength of light, λ, must first be measured. Using these values, the angle can be calculated using the formula θ = sin-1 (nλ/d). To determine θ using the angular scale on the experimental apparatus, the angular scale can be used to measure the angle directly. To determine θ using a protractor, the angle can be measured directly using the protractor.
What is the velocity of a rocket that goes 700 km north in 25 seconds, and then travels another 700km south in 25seconds?
Answers
The rocket's velocity that goes 700 km north in 25 seconds, then travels another 700km south in 25 seconds is 28,000 m/s.
Given,
Distance = 700km, which is 700 * 103m, and Time = 25 seconds.Velocity is known to be equal to displacement times time.Rocket's velocity is 700*103/25, or 28*103 m/s.As a result, the speed is 28,000 m/s.The orbital velocity, which is 7.9 km/s and more than 20 times the speed of sound, is measured in this manner.V equals u ln (m I m). The rocket equation is the name of this outcome. Konstantin Tsiolkovsky, a Soviet physicist, developed it first in 1897. It provides us with the change in velocity that the rocket experiences as a result of burning a mass of fuel that reduces the total mass of the rocket from m0 to m.To know more about Velocity here
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Is it possible to whirl a bucket of water fast enough in a vertical circle so the water won't fall out if so, what is the minimun speed
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Yes, it is possible to whirl a bucket of water fast enough in a vertical circle so the water won't fall out.
The minimum speed required to do this is known as the “Centrifugal Force Limit” and is calculated based on the size and shape of the bucket and the weight of the water. Generally, a speed of at least 20-30 revolutions per minute is required to keep the water from spilling out.
F = (m * v^2) / r
Where:
F = centrifugal force (N) m = mass of water (kg) v = linear velocity (m/s) r = radius of the circle (m)Learn more about speed:
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Adjusting the test-mass riser along the platform changes the radius of the circular path. True or false?
Answers
False: Adjusting the test-mass riser along the platform changes the radius of the circular path.
What is circular path ?
A circular path is a path that follows a circular shape or loop, as opposed to a linear path which follows a straight line. It is a type of motion that is common in physics, engineering, and mathematics. In engineering, circular paths are often used to describe the motion of objects such as wheels, gears, and pulleys.
In mathematics, circular paths are commonly used to describe rotations, orbits, circles, and other types of curves. Circular paths can also be used in artwork, architecture, and design.
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An object of mass M moves in one dimension along the x-axis. A conservative force F(x) is exerted on the object. The potential energy U(x) associated with this force as a function of position x is shown in graph 1. A student used the potential energy graph to construct the graph of F(x) as a function of x shown in graph 2. Are these graphs consistent with one another, and if not, what is the error?
Answers
These graphs do not consistent with one another because one is graph of potential energy U(x) vs distance(x) and two is graph of force (F(x)) vs distance(x).
What is potential energy?Potential energy in physics is the energy that an item retains as a result of its position in relation to other objects, internal tensions, electric charge, or other elements.
Now, if a force F(x) is applied on an object, that caused a displacement of the object a distance x. Then potential energy of the object is:
U(x) = ∫ F(x)dx.
Hence, U(x) ≠ F(x)
That's why, these graphs do not consistent with one another.
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When the velocity arrow and the acceleration arrow both point in the same direction, the velocity of the object is decreasing.
Answers
It is a False statement, because the acceleration arrow points forward, but the velocity arrow is reversed.
What is meant by acceleration?
Any modification of motion's speed or direction is referred to as acceleration. When anything is speeding up, slowing down, or not travelling straight ahead, it is said to be accelerating.In mechanics, acceleration is the rate at which an object's velocity with respect to time changes. Vector quantities include accelerations.An object's acceleration is oriented according to the direction of the net force acting on it. the degree to which an object accelerates, as stated by Newton's Second Law.When a vehicle accelerates in its present direction of motion, this is referred to as linear acceleration (or tangential acceleration in circular motions), and the reaction felt by the passengers is a force that pulls them back into their seats.To learn more about acceleration refer to
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What is the hypothesis of thermal energy transfer?
Answers
The heat transfer theory attempts to anticipate the energy transfer that may occur between material bodies as a result of temperature differential. Conduction, convection, and radiation are the three processes through which heat may be moved from one location to another.
Heat transfer is a thermal engineering subject that deals with the creation, consumption, conversion, and exchange of thermal energy (heat) across physical systems.
Heat transmission techniques include thermal conduction, thermal convection, thermal radiation, and energy transfer via phase shifts. To achieve heat transfer, engineers also address the transfer of mass of different chemical species (mass transfer in the form of advection), either cold or hot. While these processes have separate properties, they frequently occur in the same system at the same time.
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Distance and ___ are really the same quantity. A. length b. direction c. speed d. displacement
Answers
Answer:
distance and length are the same quantity
It will be useful to be familiar with electric dipole moments when you start your study of electrocardiography. An electric diople moment is a vector that points:
Answers
An electric dipole moment is a vector that points means it has both magnitude as well as direction.
What does dipole moment electricity entail?A vector quantity is the electric dipole moment. It moves from a negative charge to a positive charge in a clearly defined direction. But it's crucial to keep in mind that only in physics is this convention of direction used.
What is the dipole moment in units?This vector quantity points in the direction of the dipole's positive charge from its negative charge. The SI unit for electric dipole moment is the coulomb-meter (Cm), whereas the C.G.S. unit is the debye.
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The primary evidence that our Sun is a third-, fourth-, or fifth-generation star comes from the fact that our ________.
Answers
The fact that our Solar System has too many heavy elements to be first-generation provides the strongest support for the hypothesis that our Sun is a third, fourth, or fifth-generation star.
In astronomy, a star is a brilliant plasma spheroid that is kept together by gravity. The Sun is the planet's closest star. The human eye can see a great number of other stars at night, but due to our planet's size, they seem like stationary points of light. Numerous of the brightest stars were given names, and the most notable stars have been grouped into constellations and asterisms. The known stars have been identified and given standard designations in star catalogs that astronomers have put together. On average, there are 1022–1024 stars in the observable universe. In the Milky Way galaxy, there are just 4,000 of these stars that can be seen with the unaided eye.
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he cars mass was only 111 kg. Suppose two of these cars are used in a stunt crash for an action film. If one car's initial velocity is 9.00 m/s to the right and the other car's velocity is 5.00 m/s to the left, how much kinetic energy is discinated in the crash
Answers
In the crash 5883 Joule kinetic energy is discinated when two of these cars are used in a stunt crash for an action film.
How do you use start kinetic energy to calculate end kinetic energy?Final kinetic energy (KE) is equal to 1/2 m1v'12 + 1/2 m2v'22 , or joules. The end kinetic energy for common things will be lower than the starting point. The only way you can increase kinetic energy is if the impact causes an energy release of some type.
How can total kinetic energy be calculated?As a result, the kinetic energy equation states that it is equal to 1/2 the object's mass times the magnitude of its velocity squared, or speed squared.
Initial kinetic energy KE,
[tex]KE=1/2 m_1v_1^2 + 1/2 m_2v_2^2[/tex]
[tex]KE=1/2 (111)(9.00)^2 + 1/2 (111)(5.00)^2[/tex]
[tex]KE= 4495.5+1387.5[/tex]
[tex]KE= 5883J[/tex]
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What is better static or dynamic stretching?
Answers
Explanation:
This intense stretching method uses bouncing movements to push your body beyond its normal range of motion. Whereas static stretches are performed slowly and gradually, the ballistic method stretches muscles much farther and faster. You can do many of the same stretches as ballistic or static stretches.
The figure shows the electric field lines near two charges q1 (red, on the left) and q2 (blue, on the right)
Answers
The magnitude of the ratio of charges q1 to q2 is 23:12.
Electric field lines help us to visualize electric fields. There are two charges in the figure represented by colors red on the left and blue on the right. The red is charge q1 and and blue is charge q2. The number of electric field lines that are emerging from charge q1 and q2 are proportional to their respective charges.
The electric field lines emerging from q1 charge in red are 23 while the electric field lines emerging from the q2 charge in blue are 12. Therefore, the ratio of magnitude of their charges will be
⇒ q1/q2 = 23/12
Therefore, the magnitude of the ratio of q1 to q2 is 23:12.
--The question is incomplete, the complete question is
"The figure shows the electric field lines near two charges q1 (red, on the left) and q2 (blue, on the right), calculate the magnitude of their ratio."--
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