Although the spring force has a negative sign and is a restoring force, the elastic potential energy cannot be negative.
what is potential energy ?
Potential energy is the energy stored by an item as a result of its location relative to other objects, internal tensions, electric charge, or other reasons.
The gravitational potential energy of an item, the elastic potential energy of a stretched spring, and the electric potential energy of an electric charge in an electric field are all examples of common forms of potential energy. The joule, denoted by the sign J, is the unit of energy in the International System of Units (SI). is the energy stored by an item as a result of its location relative to other objects, internal tensions, electric charge, or other reasons.
The gravitational potential energy of an item, the elastic potential energy of a stretched spring, and the electric potential energy of an electric charge in an electric field are all examples of common forms of potential energy. The joule, denoted by the sign J, is the unit of energy in the International System of Units (SI).
Although the spring force has a negative sign and is a restoring force, the elastic potential energy cannot be negative. Positive potential energy is stored in the spring as soon as it is stretched or compressed.
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The mass of a carbon atom is 12. 00amu while the mass of a helium-4 atom is 4. 003amu. If three atoms of helium fuse to form carbon, how much mass is converted into energy?.
If three atoms of helium fuse to form carbon than 0.009 u of mass is converted into energy
Given: m(He) = 4.003 u
and m(C) = 12.000 u
Mass of 3 alpha particles =3×4.003 u
=12.009 u.
Mass of 1 carbon atom=12.000 u
Mass Defect =△m=12.009−12.000=0.009 u
Energy released =0.009×931.5=8.3835 MeV.
So, 0.009 u of mass is converted into 8.38 Mev energy.
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dylan sits on a bar stool, with his feet off of the floor. the seat of the bar stool is free to rotate. dylan is holding a wheel (moment of inertia
The wheel has a significant angular momentum in its ultimate state, pointing vertically upward, thus the stool and pupil must both revolve in the opposite direction to achieve equality.
How do you utilize the Moment?The script approach of utilizing MomentJS allows you to utilize it inside a browser. It can be installed via npm and is also compatible with Node. js. You can easily add, subtract, verify dates, retrieve the maximum and minimum dates, and more with MomentJS.
What does a data moment mean?A set of characteristics used to evaluate a distribution is called a moment. There are four frequent moments: First, the mean, or average. Second, Variance The standard deviation, which shows how evenly the data are distributed around the mean, is determined using the square root times variance.
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find the direction of the velocity vector of each of the following points, as viewed by a person at rest on the ground: (i) the highest point on the hoop; (ii) the lowest point on the hoop, (iii) a point on the right side of the hoop, midway between the top and the bottom.
(i) The velocity vector at the highest point on the hoop is 3.12 î, θ = 0°.
(ii) The velocity on the lowest point on the hoop is 0.
(iii) The velocity vector midway on the right is 1.56 î - 1.56 j, θ = -45°
Given that, Mass of the hoop is 2.2 kg
Hoop diameter D = 1.2 m
Hoop rotational speed ω = 2.6 rad/s
The velocity vectors as viewed by someone at rest on the ground are:
The tangential velocity vector of the top of the hoop is tangential to the top, therefore, it is in the direction of the hoop.
The magnitude of the velocity | v tant | = ω × r
| v tant | = 2.6 × 0.6 = 1.56
As the direction is in the positive x- direction, | v tant | = 1.56 î
The velocity due to translation of the hoop is v htr = 1.56 î
The velocity at the top v t = v tant + v htr = 3.12 î
The magnitude of velocity is 3.12 m/s, the direction is forward θ = 0°
(ii) The direction of velocity at the bottom is v tan b = - v tan t
v b = - v tan t + v htr = -1.56 +1.56 = 0
Thus, the velocity vector at the lowest point is 0.
(iii) The velocity midway between the top and the bottom of the hoop is given as follows:
The tangential velocity v tan m = 1.56 j
Sum of the velocity v m = 1.56 î - 1.56 j
The direction of velocity is given as tan⁻¹(-1.56/1.56) = -45°
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a sled with mass 11.00 kg moves in a straight line on a frictionless horizontal surface. at one point in its path, its speed is 2.00 m/s; after it has traveled a distance 4.00 m beyond this point, its speed is 7.00 m/s.
A sled with mass 11.00 kg moves in a straight line on a frictionless horizontal surface. at one point in its path, its speed is 2.00 m/s; after it has traveled a distance 4.00 m beyond this point, its speed is 7.00 m/s. The magnitude of the force acting on the sled is 61.874 newtons.
What is Work- energy theorem?
The Work-Energy Theorem states that the work done by the external force applied on the sled (W), in joules, is equal to the change of its translational kinetic energy (ΔK), in joules:
W = ΔK
By definitions of work and translational kinetic energy we expand the equation above:
F . s = [tex]\frac{1}{2}[/tex] .m. (υ₂² - υ₁²)
Where:
F - External force applied on the sled, in newtons.
s - Travelled distance, in meters.
υ₂,υ₁ - Initial and final velocities, in meters per second.
And we know that, m = 11 kg, υ₁= 2 m/s, υ₂ = 7 m/s, s= 4 m
F = m(υ₂² - υ₁²) / 2.s
= 11 ( 7² - 2² ) / 2 × 4
F = 61.874 Newtons.
Thus, the force can be found as 61.874 Newtons.
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Which of the following is closest in size (radius) to a neutron star?A) the EarthB) a cityC) a football stadium D) a basketballE) the SunAnswer: B
B) A city is closest in size to a neutron star.
A typical neutron star has been found to be 1.4 times as heavy as Sun and has a radius of approximately 11 km.
Earth is not considered to be the closest since it has a radius of 6378 km which is much greater than the radius of a neutron star. Similarly, the Sun has a radius of 696,340 km therefore Sun is also not considered to be the closest.
The radius of a basketball is 4.7 inches which is equal to 0.00012 km so it is much less than the radius of a neutron star.
On the other hand, a city has a radius of approximately 10 to 30 km therefore it is considered to be the nearest in radius to a neutron star
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the 28-cm-diameter disk in (figure 1) can rotate on an axle through its center. for general problem-solving tips and strategies for this topic, you may want to view a video tutor solution of nutcracker.
The 28-cm-diameter disk in (figure 1) can rotate on an axle through its center clockwise with net torque 0.7 Nm.
How is the net torque calculated?Given from figure is ,
D = 28 cm = 0.28 m
r = D/2 = 0.14 m
θ = 45°
F₁ = 30N
F₂ = 20N
F₃ = 30N
To calculate net torque,
∴ τ = -(F₁ × r) + (F₂ × r/2) + (F₃ × r/2 )(sin 45°)
∴ τ = -(3 0 × 0.14) + (20 × 0.07) + (30 × 0.07 × 0.707)
∴ τ = -(4.2) + (1.4) + (2.1)
∴ τ = -0.7 Nm
The net torque about the axle will be -0.7 Nm and the negative sign indicates that it is clockwise .
What is the net torque?The net torque is easily found by adding the torques produced about the axis by forces that are at a perpendicular distance from the axis and whose lines of action do not touch the center point.Here, clockwise is negative and counterclockwise is positive. The torque due to a force can be easily expressed as the product of the force and the vertical distance between the center and the force (also called the force arm).
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most waves approach the shore at an angle. however, they bend to be nearly parallel to the shore as they approach it because blank .
Most waves approach the shore at an angle. However, they bend to be nearly parallel to the shore as they approach it because when a wave reaches a beach or coastline, it releases a burst of energy that generates a current, which runs parallel to the shoreline.
Most waves approach shore at an angle. As each one arrives, it pushes water along the shore, creating what is known as a longshore current within the surf zone.Waves approach the coast at an angle because of the direction of prevailing wind.The part of the wave in shallow water slows down, while the part of the wave in deeper water moves at the same speed.Thus when wave reaches a beach or coastline, it releases a burst of energy that generates a current, which runs parallel to the shoreline.To know more about waves visit:
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an electric fan is turned off, and its angular velocity decreases uniformly from 600 rev/min to 200 rev/min in 4.00 s.
The angular acceleration of fan whose angular velocity decreases uniformly from 600 rev/min to 200 rev/min in 4 sec is 100rev/min².
We know very well that angular acceleration is defined for the objects which are undergoing some rotation. It means if the body which holds angular velocity, it will also hold some amount of angular acceleration
We also know that angular acceleration is stated as rate of change of angular velocity.
Here we can see that angular angular velocity is dropping from 600 rev/min to 200 rev/min.
So, according to angular acceleration formula([tex]\alpha[/tex] )= Δω/Δt
whereas Δω=ω₂-ω₁
Now, here ω₂=200rev/min
and ω₁=600 rev/min
Therefore, angular acceleration equal to = (200-600)/4= -400/4= -100rev/min².
Here, Negative sign indicates that angular acceleration is decreasing with time.
Hence, angular acceleration is 100rev/min².
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(Complete question) is:
an electric fan is turned off, and its angular velocity decreases uniformly from 600 rev/min to 200 rev/min in 4.00 s. Find the angular acceleration of electric fan in 4.00 minutes.
a 31.0 kg solid cylinder is rolling without slipping across a horizontal surface at a speed of 5.8 m/s. how much work (in j) is required to stop it?
Therefore, only when kinetic energy reaches 521.42J, the cylinder will halt.
What is speed in physics and its unit?As a result, the fundamental unit of time and the basic unit of distance are combined to form the SI unit of speed. Thus, the metre per second (m/s) is the SI unit of speed. the speed at which an object's location changes in any direction. The distance traveled in relation to the time it took to travel that distance is how speed is defined. Given that it only has a direction and no magnitude, speed is a scalar quantity.
What is speed in law of motion?We must use our imagination to comprehend the significance of its pace at any given time. We calculate the distance the object would go if it were designed to continue moving at the same speed as it was at the relevant instant for a full unit of time, say 1 second. Then, this distance per second is its speed.
Breifing:A rolling object's combined linear & rotational kinetic energies make up its total kinetic energy:
KE=1/2 mv²
Kinetic energy is now provided by:
Kt=1/2mv²=1/2(31.0kg)(5.8m/s)²= 521.42 J
KE=521.42J
Therefore, it takes 521.42J of kinetic energy to stop a solid cylinder from rolling across a horizontal surface at a speed of 5.8m/s without slipping.
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estimate the moment of inertia of a bicycle wheel 65 cm in diameter. the rim and tire have a combined mass of 1.1 kg .
The moment of inertia of a bicycle wheel of 65cm diameter and mass 1.1 kg is 0.116 Kg m^2.
What is moment of inertia?
Moment of inertia can be defined as the tendency of any object to remain in the state of rest or a constant rotational velocity which can be calculated by I = mr^2, where I is moment of inertia, m is mass and r is radius.
The moment of inertia of the bicycle wheel can be calculated as,
diameter of the bicycle wheel = 65 cm = 0.65 m
radius = d/2 = 0.65 m / 2 = 0.325 m
I = mr^2 = 1.1 Kg x (0.325m)^2 = 0.116 Kg m^2
Therefore the moment of inertia of the bicycle wheel is 0.116 Kg m^2.
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As you approach a steady light source, the wavelength of the emitted light appears?.
As you approach a steady light source, the wavelength of the emitted light appears shorter.
The distance over which a periodic wave's shape repeats is known as its wavelength. It is a property of both traveling waves and standing waves, as well as other spatial wave patterns. It is the distance between two successive corresponding locations of the same phase on the wave, such as two neighboring crests, troughs, or zero crossings. The spatial frequency is the reciprocal of the wavelength. The Greek letter lambda () is frequently used to denote wavelength. The term wavelength is also sometimes used to describe modulated waves, their sinusoidal envelopes, or waves created by the interference of several sinusoids.
Wavelength and frequency are inversely related for a sinusoidal wave traveling at a constant speed.
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the concepts of work, power, and impulse are all related to momentum and energy transfer. Which of the following are scalars (as opposed to vectors)? Multiple Select :
1) Work
2) Impulse
3) Power
A mathematical science is physics. The fundamental ideas and precepts have a mathematical foundation.
What is scalar quantity?In the course of studying physics, we will come across a wide range of ideas that have mathematical foundations. While the conceptual nature of physics will frequently be the focus, its mathematical component will receive extensive and ongoing attention.
It is possible to express in words how an object moves. There are many terminologies that can be used to describe moving objects, even for those without a background in physics.
A adequate vocabulary for expressing the motion of objects is provided by words and expressions like "moving quickly," "stopped," "slowing down," "speeding up," and "turning." These and numerous other words are used in physics.
Therefore, A mathematical science is physics. The fundamental ideas and precepts have a mathematical foundation.
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50% part (b) to what maximum height, in meters, above the nozzle can this water rise? (the actual height will be significantly smaller due to air resistance.)
Our maximum height will be equal to V 2 squared divided by 2 G, or 1 63 m.
What is the maximum height to be calculated?Although diameters are not provided in this problem, we will put in several diameters that we can use as one. V one is equal to a two V two, which is 40 times 10 to the minus three.Therefore, our V1, or speed 1, is 40 times 10 to the negative three divided by pi over four times nine times 10 to the negative two squared. Thus, V1 is 6.28 m/s. In a similar vein, RV two is 56.5 m/s and we have a new diameter.A pressure drop is therefore equal to P one minus P two, or one half row V two squared minus V one squared, which is equal to 1581356 pascals. Our maximum height will be equal to V 2 squared divided by 2 G, or 1 63 m.To learn more about Maximum height refer to:
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What are the similarities and differences between concentrated solar power and concentrated photovoltaics?.
Concentrated Solar Power (CSP) and Concentrated Solar Power (CPV) are two types of solar energy technologies that are used to generate electricity.
The most obvious difference between CSP and CPV is the method used to convert sunlight into energy. Concentrated Solar Power works by using mirrors or lenses to concentrate sunlight onto a receiver that absorbs the heat and then uses it to produce steam. The steam is then used to power a turbine, which in turn generates electricity. CPV, on the other hand, uses photovoltaic cells to directly convert sunlight into electrical current.
The efficiency of CSP and CPV also varies significantly. CSP is generally more efficient than CPV, as it can capture a wider range of the electromagnetic spectrum from sunlight and convert it into energy. However, Concentrated Solar Power can be more efficient in terms of the amount of energy it produces per unit area, due to its ability to concentrate light onto a smaller area.
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select all the true statements about the dependence of extrusion force on die angle in direct extrusion. group of answer choices the total force increases with increasing die angle. the force required for redundant deformation increases with increasing die angle. the ideal force (assuming no redundant deformation and no friction) remains constant with changing die angle. the friction force at the billet-die interface increases with increasing die angle.
The statement that is true about the dependence of extrusion force on die angle in direct extrusion are:
The ideal force (assuming no redundant deformation and no friction) remains constant with changing die angle.The force required for redundant deformation increases with increasing die angle.An extrusion force can be applied to push the charge against the die. In practice either the die or the charge may rotate or they may be counter-rotating. The relative rotary motion between the charge and the die has several significant impact on the process. The primary factors that influence the extrusion force are: metal deformation resistance during extrusion, deformation degree (extrusion ratio), extrusion speed, friction conditions between the billets and die contact surface, extrusion die angle, product section shape, billets length and extrusion method.
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111 -0.5 Drought resistance (change in biomass 1986–198 -1.0 After D. Tilman and ), A. Downing. 1994. Nature 367:363--365. -1.5 0 15 25 5 10 20 Plant species richness before drought Tilman and Downing studied the impact of plant species richness on drought resistance in prairie communities. What conclusion can you draw from their figure? Communities with more species before the drought lost less biomass during it Communities with fewer species before the drought lost less biomass during it Communities with intermediate species before the drought lost less biomass during it The number of species within the community did not affect biomass during drought
The conclusion drawn from Tilman and Downing studies on the impact of plant species richness on drought resistance is that Communities with more species before the drought lost less biomass during it
From the two graphs below from Tilman D and Downing JA (1994), it can be seen that communities having higher species richness (> 10 plant species richness ) has less deviation of biomass ratio compared to communities having low species richness (<5 plant species richness) before and after drought.
Communities having higher species richness before draught has higher draught resistance as well as higher biomass ratio. Plant species richness in 1989 shows that a higher species richness result in less higher biomass ratio.
Therefore, the conclusion drawn from their figure is " Communities with more species before the drought lost less biomass during it".
The given question is incomplete. The complete question is:
Tilman and Downing studied the impact of plant species richness on drought resistance in prairie communities. What conclusion can you draw from their figure shown in image attached below?
Communities with more species before the drought lost less biomass during it
Communities with fewer species before the drought lost less biomass during it
Communities with intermediate species before the drought lost less biomass during it
The number of species within the community did not affect biomass during drought
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Two airplanes are flying in the sky in such a way that the gravitational attractions between them decreases. The planes must be flying.
The planes must be flying because of earths gravity when two airplanes are flying in the sky in such a way that the gravitational attractions between them decreases.
In mechanics, gravity—also known as gravitation—is the constant force of attraction that pulls all matter together. It has no impact on determining the internal characteristics of common matter because it is by far the weakest known force in nature.
All objects on Earth experience weight, or a gravitational pull that is proportional to their mass and is imposed by the planet's mass. The acceleration that gravity gives to objects falling freely serves as a gauge of its strength. The acceleration of gravity at Earth's surface is approximately 9.8 meters per second. As a result, during free fall, an object's speed increases by about 9.8 meters per second. A freely falling body accelerates to about 1.6 m/s2 at the Moon's surface.
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from an astronomical perspective, where would be the best location to put a telescope? group of answer choices on a tall, dry mountain peak close to a large city where there are many astronomers to use it on the west coast of the u.s. very close to sea level (a location like seattle, for example) in a dark spot right on the campus
A tall, dry mountain peak close to a large city would be the best location to put a telescope.
A telescope is a device that focuses a significant amount of light through large-diameter lenses or mirrors to enable the observation of distant objects with extremely weak light.
The following factors must be considered while choosing a telescope's location:
The location must be far from cities and other bright light sources in order to ensure that no neighboring lights interfere with the observation.
To prevent fogging up of the optical surfaces and to lessen the thermal expansion that alters the length of the instrument, the climate should be as stable as possible with minimal temperature variations.
You must pick a location where there is little rain and thus little cloud cover.
We can determine which luxury will be the most appropriate based on these needs.
a) A lot of light is present in the area.
b) There is a lot of wind and humidity.
c) There is enough light.
d) The stable climate, low light levels, and low humidity make this a suitable location.
e) a lot of light and humidity.
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Two long, straight wires cross each other at a right angle, and each carries the same current I (see figure below). Which of the following statements is true regarding the total magnetic field due to the two wires at the various points in the figure? More than one statement may be correct.a.The field is strongest at points B and D.b.The field is strongest at points A and C.c.The field is out of the page at point B and into the page at point D.d.The field is out of the page at point C and out of the page at point D.e.The field has the same magnitude at all four points.
" The Magnetic field is strongest at points B and D" and " The field is out of the page at point B and into the page at point D" these statements are correct.
How do a magnetic field and current affect a wire?Both poles of the magnet will be repelled by the magnetic field by bending away from the wire because the magnetic field produced by the electric current in the wire is changing directions around the wire.The magnitude of the magnetic field is inversely related to the perpendicular distance from the wire and proportionate to the current.The amount of current flowing is always inversely correlated with the intensity of the magnetic field. As a result, as the current grows, so does the magnetic field.Since the coil is surrounded by a concentrated magnetic field created by the electric current, this field flux can be thought of as a form of energy storage for the electrons' kinetic motion through the coil. the coil's current is higher.To learn more about magnetic field refer,
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What are the 3 Earth's internal heat?.
There are three primary sources of interior heat: (1) heat from the planet's formation and accretion, which has not yet been lost; (2) frictional heating brought on by the planet's denser core material sinking to the center; and (3) heat from radioactive element decay.
What is a brief explanation of heat?Heat is the movement of kinetic energy from a source of energy to a medium or an object, or vice versa. Absorption, conduction, & convection are the three possible pathways for this energy conversion.
What is heat in reality?In solids, liquids, and gases, the movement of microscopic particles known as atoms, molecules, or ions produces heat energy. One thing can impart heat energy onto another.
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Nearly the entire world uses the metric system for their measurements. The US is 1 of 3 countries that does not use metric. Would you support changing school curriculum to teach the metric system as the primary measurement system in the US? Why or why not?
The answer is yes, I would suggest using the same metric system because in whole world the metric system is same then it will be easy to solve the problems.
What is metric system?The progressions metric system, which had been implemented in France in the 1790s, was the measuring system that was replaced by the metric system. The International System of Units (SI), which was created in the middle of the 20th century with the help of an international standards body, was the historical culmination of the evolution of these systems. The term "metrication" refers to the adoption of the metric system.
The acknowledgement of various principles is the result of the historical development of metric systems. One base unit of measurement can be used to express each of nature's essential dimensions.
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a car with mass m 1500 kg travels at a speed of 90 kmh then brakes to a stop how much mass should the brakes have
The brakes have 468750KJ
What is speed?The speed at which an object's location changes in any direction. The distance traveled in relation to the time it took to travel that distance is how speed is defined. Since speed simply has a direction and no magnitude, it is a scalar quantity.
Given mass of car =1500kg
u=speed=90km/hr=90× 5 /18m/sec
u=25m/sec
it have to stop in 5sec
then final velocity =0
⇒v=u+at
o=25+a×5
=a=−5m/sec ^2
then the force applied by break is ma
=1500X−(5m/sec^2)
=−7500M
force =7500N by break
distance travelled to stop the car after break is applied (s=distance)
v ^2=u ^2+2as
0=(25) ^2−2×5×s
=s= (25) ^2 /10
=62.5m
work done by break =F×s
w=7500×62.5=468750KJ
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Light waves are electromagnetic waves that travel at 3. 00 108 m/s. The eye is most sensitive to light having a wavelength of 5. 50 10-7 m.
The frequency of light is calculated to be 5.45* 10¹⁴ Hz.
The relationship between frequency and wavelength of an electromagnetic wave is given by c = f λ
where, c is the speed of light (3* 10⁸ m/s)
f is the frequency
λ is the wavelength
In this problem, let us consider the wavelength of light as 5.5* 10⁻⁷ m
Substituting the values in the above equation, let us find out frequency.
f = c/λ = 3* 10⁸/5.5* 10⁻⁷ = 5.45 * 10¹⁴ Hz
Thus, the frequency of an electromagnetic wave is found to be 5.45* 10¹⁴ Hz.
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two particles collide, one of them initially being at rest. is it possible for both particles to be at rest after the collision?
Both particles could be at rest after the impact. You cannot have both things at rest.
What causes collisions and why?Distracted driving is the most frequent reason for a vehicle accident. Speeding, disobeying traffic signs, unsafe maneuvers, and operating a vehicle while inebriated or under the influence of drugs are additional risk factors for car accidents.
Which collision kinds are there?Elastic, inelastic, and entirely inelastic collisions are the three main types that can occur. To reiterate, momentum is preserved in each of the three categories of collisions. What happens to the kinetic energy is what characterizes the impacts.
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a 950n basketball player jumps to block a jump shot. here is what you know: the average force applied to the floor: 1800n force is applied over a vertical distance of .5m (from the lowest point in the squat to the position at the instant of takeoff.
The instant take off speed is 2.96 m/s
What is force applied over distance?It is intimately correlated with both the amount of force applied to the item and its motion. The equation below may be used to compute work: Work is equal to force times distance. The Newton meter is the SI unit of work (N m). When an item is moved across a distance of 1 m with 1 N of force, one joule is equal to the amount of work that is accomplished.The forces and motion in a standing vertical leap are both vertical. F = FGRF - mg, where FGRF is the vertical ground reaction force applied to the jumper and mg is the jumper's body weight, results in a vertical force on the jumper.Given :
Weight of the Basket ball Player = 950 N.
Force Applied on the Floor = 1800 N
over Vertical distance = .5 m
resultant force f = 1800 N - 950 N = 850 N
work done = 850 * 0.5 m =425 J
kenetic energy = 1/2 mv^2= 425
mass = 950/ g = 96.9
v^2 = 425 * 2/ 96.9
v= [tex]\sqrt{8.78}[/tex] = 2.96 m/s
instant Take off is 2.96 m/s
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when first-mover advantage is crucial and a high degree of competitive intensity prevails, the approach is better for international expansion.
With the exception of Microsoft's Bing search engine, all of the following businesses were pioneers.
How Does First-Mover Advantage Work?Simply put, a first-mover advantage is a company's capacity to outperform its rivals as a result of being the first to market in a new product area. We believe it is important to distinguish between long-lasting first-mover advantages and those that are fleeting. Long-lasting first-mover advantages increase a firm's market share or profitability over time. Although no advantage lasts forever, businesses who are successful in establishing long-lasting first-mover advantages frequently dominate their product categories from a market's infancy to its mature stage for many years. Both the importance and endurance of early success are well demonstrated by Coca-Cola in soft drinks and Hoover in vacuum cleaners.The first mover advantage is used to describe the advantage of gained by a business when it first enters a market segment before every other business. This advantage allows the business more market share or monopoly in comparison to other businesses that enter the market later.From the above we liken this advantage to rock, scissors and papers where the first player to choose the right object such as rock Vs scissors wins.To know more about First-Mover Advantage
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Suppose you drop a book. As the book is falling to the ground, which of the following statements is true?A. The magnitude of the force that the Earth exerts on the book is larger than the magnitude of the force that the book exerts on the Earth B. Because the book is in free fall, there is no force between the Earth and book. C. The magnitude of the force that the Earth exerts on the book is smaller than the magnitude of the force that the book exerts on the Earth D. The magnitude of the force that the Earth exerts on the book is the same as the magnitude of the force that the book exerts on the Earth
The amount of force that the Earth applies to the book is more than the amount of force that the Earth applies to the book. There is no force holding the book to the Earth because it is falling freely.
What is force?
An external force is an agent that has the power to alter the resting or moving state of a body. It has a direction as well as a magnitude. The application of force is the point at which load is exerted, and the direction in which the forces are applied is known as that of the direction of the force. A spring balance can be used to calculate the Force. Newton is the SI unit of force (N).
The amount of force that the Earth applies to the book is less than the amount of force that the Earth applies to the book. While the table is exerting an upward response force on the book, the force that the Earth exerts on it is the same as the force that the book exerts on the Earth. The book doesn't move since the forces are equal and in opposition to one another.
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truck covers 43.7 m in 6.8 s while smoothly slowing down to a final speed of 2.7 m/s. find its original speed. answer in units of m/s.
The original speed of the truck would 0.7 m/s covering 43.7m in 6.8s
What is velocity, for instance?Velocity can be defined as the rate at which something moves in a specific direction. as the speed of a car driving north on a highway or the pace at which a rocket takes off. The scalar indicates that the velocity vector's absolute value magnitude will always equal the motion's speed.
Can velocity go backwards?The change in position (displacement) of an object over a period of time is referred to as its velocity. Speed can only be positive, whereas velocity can be either positive or negative because it combines both speed and direction.
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derive an equation for specific gravity in terms of the dry sample weight and the apparently lighter submerged weight (which is the real weight minus the buoyant force). you will use no other quantities in the equation. calculate the specific gravity of each sample.
The Specific Gravity for sample 1 is 1.095g and for the Specific Gravity for sample 2 is 1.088g.
What is Specific Gravity?
The ratio of a substance's density (mass per unit volume) to the density of a specific reference material is known as its relative density or specific gravity. When determining a substance's specific gravity, liquids are typically compared to the densest form of water (at 4 °C or 39.2 °F); for hydrocarbons, the reference point is atmosphere at room temperature (20 °C or 68 °F). Scientific jargon favours the term "relative density," which is frequently abbreviated as "RD," while deprecating the term "specific gravity."
A substance is less dense than the reference if its relative density is less than 1, and it is denser than the reference if it is greater.
Specific Gravity = (Dry Sample Weight) / (Submerged Weight)
Sample 1:
Dry Sample Weight = 24.8 g
Submerged Weight = 22.7 g
Specific Gravity = 24.8 g / 22.7 g = 1.095
Sample 2:
Dry Sample Weight = 27.3 g
Submerged Weight = 25.1 g
Specific Gravity = 27.3 g / 25.1 g = 1.088
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The figure shows a metallic block, with its faces parallel to coordinate axes. The block is in a uniform magnetic field of magnitude 0.018 T. One edge length of the block is 22 cm; the block is not drawn to scale. The block is moved at 2.3 m/s parallel to each axis, in turn, and the resulting potential difference V that appears across the block is measured. With the motion parallel to the y axis, V =17 mV; with the motion parallel to the z axis,V = 12 mV; with the motion parallel to the x axis, V = 0. What are the block lengths (a) dx, (b) dy, and (c) dz?
According to the given statement (a)dx = 22 cm (b) dy =28 cm (c) dz= 41 cm are the block lengths .
What is the mechanism of the magnetic field?While similar sides repel each other and, opposite polarities are attracted to one another. Iron's atoms' inland ends align in the right approximate direction when it is rubbed against a magnet. A magnetic field is produced by the force that the aligned ions produce.
Briefing:We observe that B must be along the x axis because there is no induced voltage when the velocity is along that axis.
Combining v = E /B and V = Ed leads to
Thus it is important to carefully read the symbols to make sure that d, v, and B are perpendicular to one another. The absolute value of the voltage, which is assumed to be in the same "direction" as d, is therefore 0.012V when the velocity is parallel to the y axis.
d = dz = 0.017 / (2.3 m.s)(0.018 T) = 0.41 m
On the other hand, the absolute value of the relevant voltage is 0.012V when the velocity is parallel to the Z axis, and
d = dy = 0.012 / (2.3 m.s)(0.018 T) = 0.28 m
(a)22cm (which we determine "by elimination," as we have already determined dy and dz),
(b)dy = 28 cm
(c)dz = 41 cm
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