The fact that a white object under dim illumination appears lighter than a grey object under bright illumination is called lightness constancy.
What do you mean by lightness constancy?
According to the theory of lightness constancy, we continue to see an object in terms of the percentage of light that it reflects rather than the total amount of light that it reflects. A gray item will be perceived as gray across significant changes in illumination.
Our capacity to distinguish between objects' relative reflectances despite variations in illumination is referred to as lightness constancy. The continuum from black to gray to white is the most straightforward way to conceptualize brightness constancy. These achromatic lumincances are just the amount of white light that an object reflects. The majority of light is absorbed by black objects, reflected by white objects, and scattered by gray things. When we observe an object, we do so in terms of the percentage of light that it reflects rather than the overall amount of light that it reflects. This is known as lightness constancy. In other words, despite significant variations in illumination, a gray item will appear gray. In a well-lit space, a black object stays black, while a white object stays white in a dark space. In this way, brightness constancy fulfills a similar purpose to color constancy by enabling us to see an object's characteristics as being the same under various lighting circumstances.
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A stretched wire adjusted to a length of 48cm produces the same note as a tuning fork whose frequency is 256Hz. If the wire is adjusted to 32cm, what frequency of the tuning fork would be in tune with the wire?
The frequency of the tuning fork would be in tune with the wire is 384Hz.
What does frequency mean?The rate at which current changes direction each second is known as frequency. One hertz (Hz), which is a unit of measurement used internationally, equals one cycle per second.
How frequently a periodic wave form or signal repeats itself at a specific amplitude is expressed as frequency. It can be measured in hertz, kilohertz, megahertz, etc.
Frequency of fundamental v = 1/2L [tex]\sqrt{T/M}[/tex]
1st case 256 = 1/2×48 [tex]\sqrt{T/M}[/tex] (1)
2nd case v = 1/2×32 [tex]\sqrt{T/M}[/tex] (2)
dividing (2) by (1) we get,
v/256 = 2×48/2×32
v/256 = 96/64
v/256 = 1.5
v = 1.5×256
v = 384Hz.
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1. a 5 kg block on a ramp of 20 degrees slides down to the bottom with a coefficient of friction of 0.25. what acceleration does the block have
With a 0.25 coefficient of friction, a 5 kg block on a 20 degree ramp slides to the bottom. Block acceleration is 1.04 m/s2.
Fnet = m*a = m*g*(sinΘ-µ*cosΘ). a
= Fnet/m = g*(sinΘ-µ*cosΘ)
g*(sinΘ-µ*cosΘ) = 9.8*(sin20–0.25*cos20) = 1.04m/s²
An object can push or pull on other objects by using force. An object's rate of change in speed is referred to as acceleration. An object can exert force if it has mass and is traveling through space quickly. Newton's second law of motion explains this concept. According to Newton's second law, when a massive body is subjected to a constant force, it will accelerate—that is, change its velocity—constantly. In the most basic scenario, an object at rest accelerates in the force's direction when a force is applied to it. By means of gravity, a planet or other body pulls objects toward its center. All of the planets are kept in place by gravity.
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how much horizontal force must now be applied to the block to get it to begin sliding from its state of rest?
The horizontal force must overcome static friction's opposing force in order for the box to start moving.
What is meant by horizontal force?A horizontal force is one that moves parallel to the horizon. A box of bananas weighing 40.0N is perched on a flat surface. The cycle's pace tends to slow down due to an opposing force termed air resistance force, which acts in the opposite direction. Both the applied force and the air resistance force are considered horizontal forces when the direction is taken into account. While the vertical component of a force represents the portion of the force that acts in the vertical direction with respect to the body, the horizontal component of a force represents the portion of the force that acts in the horizontal direction with respect to the body.Therefore,
The horizontal force must overcome static friction's opposing force in order for the box to start moving.
F ≥ μsmg = (0.30)(12)(9.8) N = 35.28 N
F ≥ 35.28 N
The complete question is:
What horizontal force must be applied to the box to cause it to start sliding along the surface?
A 12-kg box rest on a horizontal surface. The coefficient of static friction between the box and the surface is 0.30, and the coefficient of kinetic friction is 0.20.
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What are the four habits of the collision free approach?.
The four habits of the collision free approach are -look well ahead , move your eyes, keep space ,spot the problems.
To avoid any type of collision, a driver needs to take care about several factors. Any wrong turn will cost his life. Some of habits I am discussing here.
Always look ahead because any of distraction will cost his and the seating members life.
Proper movement of eyes should be taken care of as it is not necessary that you are driving correctly so everyone around you are also driving correctly. We need to take care about others also.
Always maintain space from the vehicle which is running ahead of you. If sudden brakes will be apply by the driver, will give us a very little response time to manage.
Whenever if we feel any of changes will create problems always sticks to the given situation, do not try to change it.
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Perewi Cor (Figure 1) shows the force needed to stretch a 20-m-long, 3.2mm-diameter wire Part A What is the strain when the wire has been stretched by 50 cm? Express your answer to two significant Mauren ? Vo] ΑΣΦ» - 124,4 Submit Previous Answers Request Answer * Incorrect; Try Again: one attempt remaining Figure 101 1 Part 8 What is the stress when the wire has been stretched by 5.0 cm? Express your answer to two significant figures and include the appropriate units. F (N) 1500 HA ? 1000 500 Value Units 0 AL (cm) Submit Request Answer 0 1 2 3 4 5 OE Value Units Submit Request Answer Part C 1 of 1 > What is Young's modulus for this wire? Express your answer to two significant figures and include the appropriate units. НА ? Y = Value Units Submit Request Answer TAL (cm) 5 Provide Feedhack
The Young modulus for the wire is 7.44 * 10^9 N/m^2.
What is the stress of the wire?For the wire that is under discussion here, we have the following parameter for the wire;
Length of the wire = 20-m
Diameter of the wire = 3.2mm
Extension of the wire = 50 cm
strain of the wire = extension/ length of the wire
strain of the wire = 50 * 10^-2 m/20 m
= 0.025
The stress of the wire = Force/Area
= 1500 N/(3.14 * (3.2 * 10^-3)^2/4)
= 1.86 * 10^8 N/m^2
Young modulus = Stress/strain = 1.86 * 10^8 N/m^2/ 0.025
= 7.44 * 10^9 N/m^2
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what does a high-amplitude p wave indicate about atrial muscle mass, and what condition might be the cause of this abnormality?
It depolarizes the atrial muscle and signifies the propagation of the excitation wave in both atria. It is a modest (= low) amplitude positive wave.
What results in an ECG's P wave?The atrial cardiac muscle depolarizes, resulting in the P wave. the complex is created by ventricular cardiac muscle polarization (note that atrial repolarization also occrus during this time, but it is hidden within the ventricular signal).
What occurs as the P wave gets bigger?Long P-wave duration, a sign of abnormality in the left atrium, is linked to myocardial fibrosis, atrial fibrillation, and all-cause mortality. It is unknown if prolonged P-wave duration in the general population is linked to sudden cardiac death (SCD).
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a 0.440-kg object attached to a spring with a force constant of 8.00 n/m vibrates in simple harmonic motion with an amplitude of 12.2 cm. (assume the position of the object is at the origin at t
The value of the objects maximum speed is 52.02 cm/s.
What is a maximum velocity (v) ?The velocity is greatest at y=0, when displacement and acceleration are both equal to zero. This means that the system is in equilibrium. Hence, at a particular point in simple harmonic motion, the maximum value of the object's speed can be calculated by using the equation,
v = A ω
Here,
v = Maximum velocity
A = Amplitude
ω = Angular frequency
What is angular frequency?The rate at which the waveform phase changes or the angular displacement of any wave element per unit of time is referred to as the angular frequency. Symbol of angular frequency is ω.
Given,
Mass of the object (m) = 0.440 kg
Force constant (K) = 8.00 n/m
Amplitude (A) = 12.2 cm
Now,
v = A ω
We know ω = √k/m
Now substituting we get,
v = A√k/m
Putting the values in the above equation, we get
v = 12.2 × √(8/0.44)
= 52.02 cm/s
Hence, the maximum speed is 52.02 cm/s.
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NOTE: The given question is incomplete on the portal. Here is the complete question.
QUESTION: A 0.440-kg object attached to a spring with a force constant of 8.00 N/m vibrates in simple harmonic motion with an amplitude of 12.2 cm. (Assume the position of the object is at the origin at t = 0) Calculate the maximum value of its speed in cm/s.
what is the displacement a particle undergoing simple harmonic motion with amplitude 0.25 m undergoes in one-half of the period?
1/4 meter this way, 1/4 meter that way, and 1/4 meter back that way, finishing at the beginning.
Total: (1.00 meters) = (0.25 meters + 0.25 meters + 0.25 meters).
What is the simplest definition of amplitude?The farthest displacement or distance a wave or vibrating body's point may move relative to its equilibrium position It is equal to dividing by two the length of the vibration path.
The amplitude of a wave is precisely what?The amplitude of a wave is its peak or trough height as measured from its center line (or stationary point).
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if the intensity of a sound wave increases by 2%, what is the change in the sound level of the wave? db
If a sound wave's intensity increases by 2%, the wave's level changes to 103.0102DB.
What is the sound level?Decibels are the units used to measure sound (dB). A motorcycle engine operating is around 95 dB louder than regular conversation, which is roughly 60 dB louder than a whisper. Your hearing may begin to deteriorate if exposed to noise levels exceeding 70 dB for an extended length of time. Your ears may suffer instant damage from loud sounds above 120 dB.
How do you gauge sound intensity?The following equation can be used to determine sound intensity: I=Δp22ρvw. P stands for pressure change or amplitude -material density vw-sound propagation speed The size of your acoustic waves oscillation determines how loud your sound will be.
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If a toaster transfers 100 joules of energy every 10 seconds, what is the power rating of the toaster?.
The power rating of the toaster will be 10 Watt
Power = Energy/time
Power = 100 joules/10 seconds = 10 Watt
So, power rating of the toaster is 10 Watt
What is Power ?Power, in science, time rate of doing work or delivering energy, expressible as the amount of work done W, or energy transferred, divided by the time interval t or W/t.
The SI unit for power is the watt W, where 1 watt equals 1 joule/second (1 W = 1 J/s).
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what force provides the net force that allows the child to continue to travel in a circle? what is the magnitude of this force?
Centripetal force .It's a force that acts on an object and allows it to keep moving in a circular path.
This allows the child to continue to travel in a circle.
How to measure the magnitude of the force?
Its magnitude is constant. And it basically depends on the mass of the object, it is acting upon. The radius of the circular path. And the speed which it is moving.
Hence its formula becomes
F= mc² r
Centripetal force always remains towards the centre.
Thus, a centripetal force is an external force acting on a rotating body. And if a kid is moving in a circular motion constantly then it's because of centripetal force.
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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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What is the heat, q , in joules transferred by a chemical reaction to the reservoir of a calorimeter containing 105 g of dilute aqueous solution ( c = 4.184 J/g⋅K ) if the reaction causes the temperature of the reservoir to rise from 21.0 ºC to 25.0 ºC ?
The heat in joules transferred by a chemical reaction to the reservoir of a calorimeter containing 105 g of dilute aqueous solution is 1757.28 J.
What is calorimeter?
Calorimeter is the device used to measure the heat during electrical, mechanical and chemical reactions and also to calculate heat capacity of the materials.
The heat transferred to a reservoir of a calorimeter can be calculated by,
Initial temperature (T1) = 21° C
Final temperature (T2) = 25° C
Change of temperature (ΔT) = T2 -T1 = 25 - 21 = 4° C.
Q = MC ΔT
where Q is the amount of heat transferred, C is the specific heat and ΔT is the change in temperature.
Q = 105g x 4.184 J/g° C x 4° C = 1757.28 J
Therefore, the heat in joules transferred by a chemical reaction to the reservoir of a calorimeter containing 105 g of dilute aqueous solution is 1757.28 J.
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The box in Fig (a) has a mass m and travels down the smooth circular ramp such that when it i..the angle θ it has a speed v Determine its angular momentum about point O at this instant and the rate of increase in its speed, i.e., a How to solve using only kinematic equations?
Angular momentum about point O at this instant and the rate of increase in its speed using only kinematic equations is a= gsinθ.
Angular momentum =I.W
=mr²*V/r
Angular momentum=mvr
F=ma
mgsinθ=m.a
a=gsinθ
The kinematic equations are a collection of equations that explain the motion of an object with constant acceleration. Kinematics is a branch of physics that originated in classical mechanics and describes the motion of points, bodies, and systems of things without taking the forces that propel them. Kinematics is the study of the motion of mechanical objects, bodies, and systems without consideration of their related physical qualities and the forces acting on them. Kinematics equations need understanding of derivatives, rate of change, and integrals. The discipline, often known as the geometry of motion, employs algebra to mathematically represent these movements.
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A uniform rod of mass m and length l is free to swing back and forth by pivoting a distance x from its center. It undergoes harmonic oscillations by swinging back and forth under the influence of gravity.
The moment of inertia uniform rod is 0.7500 kg-m².
Oscillation is the repetitive or periodic version, usually in time, of some measure approximately a principal fee or among or extra exclusive states. familiar examples of oscillation consist of a swinging pendulum and alternating current.
The moment of inertia is 0.7500 kg-m².
Given that,
Mass = 2.2 kg
Distance = 0.49 m
If the length is 1.1 m
I = 1/12mt² + mx²
= 1/2 × 2.2 × (1.1)² × (0.49)²
= 0.7500 kgm⁻²
A wave is stated to oscillate, which means to transport to and fro in a normal, repeating manner. This fluctuation may be among extremes of function, force, or quantity. different types of waves have distinctive styles of oscillations. Longitudinal waves Oscillation is parallel to the route of the wave.
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Disclaimer:- your question is incomplete, please see below for the complete question.
A uniform rod of mass M and length L is free to swing back and forth by pivoting a distance x from its center. It undergoes harmonic oscillations by swinging back and forth under the influence of gravity. Randomized Variables M=2.2 kg x= 0.49 m 33% Part (a) In terms of M, L, and x, what is the rod's moment of inertia / about the pivot point?
if the diameter of the hose is decreased, and friction remains negligible, is cavitation more or less likely in the hose?
If the diameter of house decrease fiction remain neglible then these will be no effect on the chance of cavitation because it does not depend upon the diameter.
What is friction?
When two bodies are in contact with each other, friction, a type of relative force, acts as a resistance. In other words, a force opposes the relative motion of two bodies when they come into contact with one another.
What is diameter?
The line through a circle's center with two extremes on its circumference is said to have a diameter. The term "semi-circle" refers to the division of a circle into two equal parts by its diameter. A circle's center is where its diameter meets.
Horse length= 39ft
diameter= 2.5¹¹
Patm= 11 psi
Area of hose
A= π/4*(2.5/12)²
A=0.03408ft²
A= velocity and flow rate
apply the Bernoulli equation .a and b
Pa/γ+Va²/2g+Zₐ=Pb/γ+Vb²/2g+Zb
Pa=Pb= Patm, Zₐ=0 Vₐ= 0
Zv= -14ft
0+0+0= 0+Vb²/2g-14
Vb= [tex]\sqrt{14*2g}[/tex]= [tex]\sqrt{14*2*32.17}[/tex]
Vb= 30.01 ft/s
flow rate Q=AV =0.03408*30.01
Q= 1.023 ft\s
b, Due to neglecting the friction the velocity of flow is more so that calculated discharge is over estimated.
c, negative pressure is occur at point C(Pc)
Pc is below the atmosphere pressure positive is at bottom of tank
d, vapour pressure of water at 100F Pv =0.615psi
apply energy equation between point A and C
PA\Yw + Za + Va²/2g = Pc/γ + Zc + Vc²/2g
11\Yw +0+0 = Pc\γ + H +(30.01)²/2*32.17 (Vb=Va)
for no cavitation Pc > Pv =0.615psi
11/γ -0.615/γw =H+13.98
10.385*144/62.4 = H+13.98
H< 9.98 ft
e. if the diameter of house decrease fiction remain neglible then these will be no effect on the chance of cavitation because it does not depend upon the diameter.
Therefore, if the diameter of house decrease fiction remain neglible then these will be no effect on the chance of cavitation because it does not depend upon the diameter.
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a 2000 kg roller coaster car reaches is traveling at 18 m/s as passes the top of a 24 m radius loop. determine the force that the roller coaster car exerts on the track of the loop at this point.
The force exerted by the roller coaster car on the loop's track at this position is 46600 N, also known as the upward force. Upward force is affected by net force and downward force. And downward force is affected by the gravity of the earth.
To calculate the upward force, we will use Newton's second rule of motion:
F=m·a
The following is how the upward force calculated:
Known variables:
m = 2000 kg
v = 18 m/s
r = 24 m
g = 9.8 m/s²
First, we need to find the roller coaster cas acceleration:
a = v²/r
a = (18.0m/s)²/(24.0)
a = 13.5m/s²
Net force (Fnet), as we mentioned above, is affected by the upward (F₀) and downward force (F₁) in the equation:
Fnet = F₀ - F₁
Net force is the mass of the roller coaster multiplied by its acceleration:
Fnet = m·a
Fnet = (2000kg)·(13.5m/s)
Fnet = 27000 N
Downward force (F₁) is affected by the gravity of the earth:
F₁ = m·g
F₁ = (2000kg) · (9.8m/s²)
F₁ = 19600 N
Therefore, the upward force (F₀) can be calculated using the equation:
F₀ = F(net) + F₁
F₀ = 27000N + 19600N
F₀ = 46600 N
As a result, the upward force that a 2000 kg roller coaster exerted with 18 m/s speed at 24 m radius loop is 46600 Newton
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(5 points) in the picture above, if n1 < n2 indicate which side of the wave front is traveling faster, the side of the wave front in medium 1 or in medium 2? (5 points) just as a turning car turns toward the slow-moving side, does the light turn toward or away from the surface normal as it passes from medium 1 to medium 2? draw the direction of the refracted ray (the direction of travel in medium 2) in the picture. (5 points) is there an incident angle such that there is no refracted light in this case? explain.
Moving from high n media to low n media is like moving from slow media to fast media. Such rays bend away from the normal.
Refraction of light when traveling from a fast medium to a slow medium bends the ray towards the normal boundary between the two media. The amount of bending depends on the refractive indices of the two media and is quantitatively described by Snell's law. When a wavefront enters a new medium at an angle, it changes direction.
When light hits an optically dense medium it bends toward the normal. When light enters an optically less dense medium it bends from a normal line. When light enters a material with a high index of refraction it slows down. Light bends towards the normal. When light enters a substance with a low index of refraction it accelerates. Light bends away from the normal.
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Travel on a map of texas, the distance between dallas and houston is 4. 8 inches. If 1 inch = 50 miles, what is the distance between the two cities?.
240 miles is the distance between dallas and houston.
1 inch= 50 miles
4. 8 inch= 50×4.8 = 240 miles
Distance is the length between two points or items, and it is directionless. Since distance is a scalar property, it solely takes into account the entire magnitude and ignores the start and finish locations. Being a scalar attribute, distance may only be positive or zero; it cannot be the opposite.
Although kilometers (km) and centimeters (cm) or millimeters (mm) can also be used to indicate shorter distances, the meter (m) is the most used unit of measurement for distance (mm). When calculating distance, the letter D is usually used to denote the distance traveled.
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determine the location of the center of mass of the earth-moon system. the masses are and the distance between centers is
The center of mass of the earth–moon system is located at a distance 4.6 × 106 m from the center of the earth.
Distance is a numerical or every so often qualitative size of how some distance aside items or factors are. In physics or regular usage, the distance may check with a physical duration or an estimation primarily based on other criteria.
The space between two factors in physical space is the period of an immediate line among them, that's the shortest feasible course.
It reduces the entire international or part of the arena to a small sheet of paper. At the same time as making a map, cartographers pay attention to properly constitute the distance between two locations.
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two objects are attracting each other with a .9n gravitational force. if the distance between them is tripled, what is the new gravitational force between them?
The new force is 1/9 times of the original gravitational force
What is gravitational force ?
The force that binds all masses in the universe together, particularly the pull of the earth's mass on objects that are close to its surface. synonyms for gravity include gravitation and gravitational attraction.
The term gravitational force refers to the force that the earth exerts on a body. Examples of motion caused by gravitational force include the downward motion of water in a river, the downward motion of water in a stream, and the upward motion of a ball when it is thrown.
Let F’ be the force, when the distance between the two is tripled
therefore:
the “tripled ” acts on both the “3” and the “r” leaving 4r^3
Distance and gravitational force have an inverse square relationship.
F’ = F/9
Thus the new force is 1/9 times of the original force
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If you stand near a campfire and you feel the heat without touching it, what type of thermal energy transfer is occurring?.
If we stand near a campfire and we feel the heat without touching it is convection method, heat is coming through radiation.
In thermodynamics, heat has a very precise definition that differs from how we generally use the word. When two systems with various surface temperatures come into touch with one another, heat is the thermal energy that is transmitted. The letters q or Q stand for heat, and the unit of measurement for heat is joules.
Heat is sometimes referred to as a process quantity since it is defined in the context of a process through which energy can be conveyed. The heat that a hot cup of coffee delivers to your palm may be debated, but the heat that the cup of coffee holds is not. Another noteworthy quality is heat..
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a cold canned drink is left in a warmer room where its temperature rises because of heat transfer. is this a reversible process? explain
a cold canned drink is left in a warmer room where its temperature rises because of heat transfer. Heat transfer for a internally reversible process.
Internal reversibility means that entropy is generated within the system.
Heat transfer from a process is considered reversible if it occurs due to a small temperature difference between the environment and the system.
Let's see an example
Heat transfer with a temperature difference of 0.0001 °C appears to be more reversible than heat transfer with a temperature difference of 100 °C.
as a result ,
Reversible processes can be approached by heating or cooling the system in infinitely small steps.
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the physical quantity of force has group of answer choices both magnitude and direction neither magnitude nor direction direction only magnitude only
The physical quantity of force has both magnitude and direction.
Force is a vector quantity and hence has both magnitude and direction.
Force can set a body into motion or even stop a moving body. The push or pull activity on an object is called force. It is an external agent which has an ability to change the state of a body. The S.I units of force is Newton. It is given by the formula, F = m*a
where, F is external force
m is mass of an object
a is acceleration
Force can bring about various changes like accelerate the speed of a moving body, can stop a moving body, it can make a body move from rest and it can change the direction of a moving body.
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Type the correct anwer in each box. When butane burn in oxygen, it produce carbon dioxide and water. Thi reaction i repreented in thi equation:
2C4H10 13O2 → 8CO2 10H2O
Thi equation i balanced becaue there are
atom of carbon (C),
atom of oxygen (O), and
atom of hydrogen (H) on each ide of the equation
The equation is because of all the atom of carbon, atom of oxygen, and the atom of hydrogen represents to balance the ideal of the equation.
What is the role of oxygen?
The energy-generating chemical that powers the metabolisms of most living organisms, respiration, depends heavily on oxygen. The oxygen in the air that we breathe is essential for keeping humans and many other animals alive. Plants and numerous types of microorganisms produce oxygen during photosynthesis.
How is butane formed?
Four carbon atoms make up the straight-chain alkane butane. It serves as a refrigerant and a food propellant. It is both an alkane and a gas molecule.
The presence of carbon, hydrogen, and oxygen atom are the important of ideal gas.
Therefore, the equation is because of all the atom of carbon, atom of oxygen, and the atom of hydrogen represents to balance the ideal of the equation.
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choose the correct description of how deeply each portion of the electromagnetic spectrum penetrates earth's atmosphere and if space telescopes are important to our understanding of the universe.
Only microwave radiation, visible light, ultraviolet light with extremely long wavelengths, and a small portion of the infrared spectrum may be seen from the ground.
Why do you use the word electromagnetic?A division of physics known as electromagnetism studies the magnetic wave that exists between particles with electrical charge. One of the fundamental forces, the electromagnetic force, produces electric radiation such as magnetic, electric, and optical fields.
Is the human body electromagnetic?Humans do emit radiation. Most of the electromagnetic radiation that humans emit has a frequency lower than that of visible light and is called infrared radiation. Not just humans can experience this effect. Thermal radiation is produced by every non-zero temperature item.
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a large truck and a small car are found to have the same kinetic energy. how is this possible?(1 point) responses the car is at a higher point on a hill. the car is at a higher point on a hill. the car and truck have the same speed. the car and truck have the same speed. the car is accelerating more. the car is accelerating more. the car is moving faster.
Due to its greater bulk than a car, a truck has more KE.The mass of a truck is more than the mass of a vehicle if v is the same.
Why does a truck have more kinetic energy than a car moving with the same speed?Due to its greater bulk than a car, a truck has more KE.The mass of a truck is more than the mass of a vehicle if v is the same.K. has an inverse relationship with body mass.As a result, the automobile has more kinetic energy than the truck.Since both have the same velocity, kinetic energy is mass dependent.Trucks have more kinetic energy per unit of mass than cars do.The speed of the compact vehicle and the trailer truck is the same, but we are aware that the trailer truck is larger than the tiny automobile.The trailer truck has higher kinetic energy as a result.To learn more about kinetic energy refer
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a 30.0v battery is connected in the circuit below what is the equivalent resistance of the circuit what is the current through each resistor what is the power used by 5 resistor
The equal resistance of the circuit is 10 Ω.
The current through each resistor is 3 A, 1 A, 2 A.
The power used by 5 Ω resistor is 45 watt.
Calculation:
Let us find out
Total resistance:
R = [tex]\frac{(4+2)X12}{(4+2)+12}[/tex]
R = [tex]\frac{12 X 6}{18}[/tex] = 4
So, total resistance
[tex]R_{eq}[/tex] = R + 1 + 5 = 4+5+1 = 10 Ω
Now in second circuit
Using kirchoff's law
30 = 1I + 4I+ 5I
I = [tex]\frac{30}{10}[/tex] = 3 A
So, current through
i) 1 Ω is 3 A
ii) 5 Ω is 3 A
iii) So, I = [tex]I_{1}[/tex] + [tex]I_{2}[/tex] = [tex]\frac{V}{12}[/tex] + [tex]\frac{V}{6}[/tex] = [tex]\frac{V}{4}[/tex]
∴ 3 = [tex]\frac{V}{4}[/tex] , V = 12
So, [tex]I_{1}[/tex] = 1 A and [tex]I_{2}[/tex] = 2 A
Now, let us find out
the power used by 5 Ω resistance
i.e., P = IV
I = current
V = potential difference
V = IR = 3 × 5 = 15 V
So. power p= 15 × 3 = 45 watt.
What is Resistance?
A substance's ability to obstruct the flow of electrical current is referred to as resistance. It is represented by the symbol R. The ohm, frequently written as a word and sometimes represented by the capital Greek letter omega, is the unit of resistance that is typically used.
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A model used for the yield Y of an agricultural crop as a function of the nitrogen level N in the soil (measured in appropriate units) is y = (kN)/(1+N^2) where k is a positive constant. What nitrogen level gives the best yield? N =?
The nitrogen level would give the best yield at N = 1
Given y = (kN)/(1+N^2)
first step is to take the derivative
the derivative is [tex]y' = \frac{k - kN^2}{( 1 + N^2)^2}[/tex]
ON equating this value of y' to 0
we get
y' = k - k[tex]N^2[/tex] = 0
k ( 1 - N^2) = 0
After dividing the above equation with k
and then subtracting we get ;
N = ± 1
However N = 1 is the only possible answer since the nitrogen level can't be negative
thus the nitrogen level gives the best yield at N = 1
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Describe where x-rays are found on the ems compared to the other six forms of radiation.
Incoming X-ray photons ionize atoms in a gas-filled space in a Geiger-Müller tube, also known as a Geiger counter.
Accelerating electric charges emit electromagnetic waves according to the classical electromagnetism theory. An electron beam with high energy collides with a solid target in the X-ray tube, the most popular terrestrial source of X-rays. The rapidly moving electrons in the beam repeatedly deflect and slow down as they come into contact with the electrons and nuclei of the target atoms.The different types of EM radiations include gamma rays, x-rays, ultraviolet, visible, infrared, microwave, and radiowave. Between 100 and 1000 m is the range of frequency for microwave radiation. As a result of having the second-lowest frequency range among all radiations, they also have the second-lowest energy, and their wavelength is greater than that of all other types of radiations other than radiowaves.To know more about Geiger counter-
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