The nyquist frequency of the signal containing the following frequencies 100hz, 247hz and 750hz is taken to be calculated as 1500 hz.
CalculationThe provided frequencies are as follows:
100hz, 247hz, 750hz
Then the accurate Nyquist frequency can be taken out as
fs = 2 fmax
= 2 (750)
= 1500 Hz
Describe the Nyquist theorem in a few words.The sampling theorem is another name for the Nyquist theorem. The rule is that a pure sine wave measurement, or sample rate, must be at least twice as frequent as the original to be accurately reproduced.
What is the formula for Nyquist’s theorem?Nyquist explains that we can send data at a rate of up to C=2Blog2M bits per second in a channel with no noise. B is seen as the bandwidth (in Hz) and M is the number of signal levels.
The Nyquist frequency formula is what?The Nyquist frequency can be defined as fn = 1/2t. When spectra for digital data are displayed, the highest frequency displayed is the Nyquist frequency.
For an IRIS type of broadband seismic stations, Δt = 0.05 s, so the Nyquist frequency is 10 Hz.
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An object that is changing ___ is accelerating, even if it’s speed remains the same
Answer: velocity
Explanation:
Slope of velocity time graph = acceleration. A change in velocity = a change in acceleration. A constant velocity would mean that there would be no acceleration.
Speed and velocity aren't the exact same thing. Speed is a scalar measurement while velocity is a vector measurement. The speed of an object could be different from its velocity (ex: speed CANNOT be negative while velocity can).
An object can have a constant speed but have a changing velocity.
Answer:
velocity
Explanation:
The definition of accelerate is a change in velocity, even if the speed doesn't, a change in velocity means acceleration.
the process by which the lens changes shape to focus incoming light so that it falls on the retina is called: question 22 options: 1) proprioception. 2) transduction. 3) visual accommodation. 4) visual adaptation.
The process by which eye lens changes its shape to focus the incoming light on retina is called Visual accommodation.
Accommodation - Accommodation is the ability of the eye to change the focal length of the lens by changing its curvature , to see the distant and the nearer object .
To focus on the distant objects - When object is placed at distance, ciliary muscles of eye get relaxed and pull the suspensory ligament attached to lens ,by this eye lens become thin and focus the distant object on retina.
To Focus on nearby objects - When the object is placed nearby, ciliary muscles of eye get contract and make the suspensory ligament loose , it squeezes the eye lens into a more convex shape and focus the nearby object.
The process by which the lens changes its shape to focus incoming light. so that it falls on the retina is called Visual accommodation.
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On halloween, you take a glow stick, crack the capsule inside and shake it until it glows. This is an example of light energy being transformed from which type of energy?.
When you take a glow stick, crack the capsule inside and shake it until it glows, is an example of light energy being transformed from chemical energy
Glow sticks are sticks that contain chemical components inside and when they are mixed, provide a fluorescent glowing effect.
To achieve the reaction, two basic components are needed: the activator (hydrogen peroxide) which determines the intensity and duration of the glow, and a phenyl oxalate ester together with a fluorine dye which gives the color.
At the beginning the fluorescent stick is not active because both liquids are separated, one is inside a sealed glass ampoule and the other is around the small tube, both inside the plastic cover.
When the glow stick is cracked, the glass rod breaks releasing the oxalate, this mixes with the peroxide generating a chemical reaction that is what creates that glows effect.
What is chemical energy?Chemical energy is the energy that manifests itself in certain chemical reactions where chemical bonds are formed or broken.
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Where do high tides occur? (Select all that apply.)
1: on the side of Earth facing the Moon
2: only at the North Pole
3: only at the South Pole
4: at both the North and South Poles
5: on the side of Earth opposite the Moon
(I NEED HELP ASAP I'LL GIVE BRAINLIEST)
When the Earth's surface is turned toward the Moon, high tides happen as a result of the Moon's gravitational pull.
The term "high tide" refers to the high tide on the side of the Earth that faces the moon. The term "low high tide" refers to the high tide brought on by the bulge on the other side of the Earth. The water juts out toward the moon in the vast ocean. The water rises and spills onto the land along the coastline.On the sides of the Earth that face the Moon and away from it, high tide occurs. The ocean is on the sides of the Earth that face the Moon, which causes the Moon to pull on the Earth. The Earth stretches out both toward and away from the Moon to counteract this attraction. Tides are long-distance ocean waves. They are caused by the moon's and, to a lesser extent, the sun's gravitational pull on the earth. When the crest, or highest point, of a wave, hits a coast, it is said to be at high tide.To learn more about high tides
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Here is another extremely hard question you do not want to be faced with. Is there life after death? From today till the next hundred days to come, almost every (if not all) living persons now would be dead. Death is an inescapable event which no history has survived. So, people have come to accept the inescapable fate of a living thing which is death. Now, after one’s life has ceased here on earth, does another life begin elsewhere?
The existence of an afterlife or life after this one is uncertain.
Explanation:
Wether you're reincarnated or your soul is transported to another plane of existence, such as heaven or hell for example, is uncertain. For all we know we could just cease to exist. We are born to die. And we will not know what happens once we die until we die.
Then again, there are people who die and then are resurrected. Some say there was nothing, others say there was something. We will not know until we experience death ourselves.
a piano wire with mass 3.50 g and length 75.0 cm is stretched with a tension of 27.0 n . a wave with frequency 120 hz and amplitude 1.70 mm travels along the wire.
The average power carried by the wave is 0.29 W
We know that,
[tex]P_{avg}[/tex] = [tex]\frac{1}{2}[/tex] ω² A²√ ( μ F )
ω = 2 π f
μ = m / l
where,
[tex]P_{avg}[/tex] = Average power
ω = Angular speed
A = Amplitude
μ = Linear mass density
F = Tension
f = Frequency
m = Mass
l = Length
Given that,
m = 3.5 g = 0.0035 kg
l = 75 cm = 0.75 m
F = 27 N
f = 120 Hz
A = 1.7 mm = 1.7 * [tex]10^{-3}[/tex] m
μ = m / l = 0.0035 / 0.75
μ = 4.67 * [tex]10^{-3}[/tex] kg / m
ω = 2 π f = 2 * 3.14 * 120
ω = 754 [tex]s^{-1}[/tex]
[tex]P_{avg}[/tex] = [tex]\frac{1}{2}[/tex] ω² A²√ ( μ F )
[tex]P_{avg}[/tex] = [tex]\frac{1}{2}[/tex] ( 754 )² ( 1.7 * [tex]10^{-3}[/tex] )² √ ( 4.67 * [tex]10^{-3}[/tex] * 27 )
[tex]P_{avg}[/tex] = ( 821.5 * [tex]10^{-3}[/tex] ) √ 0.126
[tex]P_{avg}[/tex] = 821.5 * [tex]10^{-3}[/tex] * 0.36
[tex]P_{avg}[/tex] = 0.29 W
Average power is the measure of total work done by the body in a given amount of time.
Therefore, the average power carried by the wave is 0.29 W
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Suppose the magnitude of an electric field that exerts a 4. 80 x 10-17 n force on an electron is 300 n/c. What magnitude of the force does this field exert on a proton?.
The magnitude of the force exerted by the electric field on the proton will be 4.80 × 10—¹⁷ N.
The force exerted by the electric field on the electron =
4.80 × 10—¹⁷ N.
The direction of the electric field that is exerting force on the electron = West
The magnitude of the electric field is,
[tex]= \frac{4.80 \times 10 ^{ - 17} }{1.6 \times 10 ^{? - 19} }[/tex]
= 300 N/C
The magnitude of the electric field is 300 N/C.
The magnitude of the force exerted by the electric field on the proton will be,
The magnitude of the force exerted by the electric field on the electron = The magnitude of the force exerted by the electric field on the electron.
[tex]= 4.80 \times 10 ^{ - 17}[/tex]
Therefore, the magnitude of the force exerted by the electric field on the proton will be 4.80 × 10—¹⁷ N.
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sketch the corresponding velocity va time and acceleration va time graphs from the position vs time graphs
The corresponding velocity vs time and acceleration vs time graphs from the position vs time graphs are given below,
What are velocity vs time graphs ?The speed-time graph: A plot between speed and time is called a velocity-time graph. It depicts the motion of an object moving straight ahead. At any given time, the magnitude of velocity equals its instantaneous speed. Only 1-D motion is intended for its drawing, which accepts positive and negative values.
What are acceleration vs time graphs ?Acceleration-Time For a particle travelling in a straight path, the acceleration is displayed against time in the graph. The acceleration-time depicts time and acceleration values on the x and y axes, respectively.
What are position vs time graphs ?An object's distance from its beginning position at any given moment since it began moving is displayed on a position-time graph. The greater the slope of the line and the faster the object's speed changes, the steeper the line is. More location vs. time graph illustrations can be found in this two-part video series.
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F=ma (pls help i need it)
the net force acting on an object is 10N as the object speeds up. what affect would applying 10x as much force have on the object? F=ma
The main affect would applying 10x as much force have on the object is the covering of 10 times more distance as compared to the previous force because the force is 10 times.
What affect would applying 10x as much force have on the object?If on movable object we apply 10x as much force then the object will move in the forward direct and accelerate more which leads to covering of distance 10 times more because we know that if one newton force is applied the body accelerate to 1 meter per second square so we apply 10 times more force so the body will accelerate 10 times and attain 10 times more distance. So that's why we can say that increasing force will lead to increase distance covered by the body.
So we can conclude that the main affect would applying 10x as much force have on the object is the covering of 10 times more distance as compared to the previous force because the force is 10 times.
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Which of the following has the two vertical probes in the proper positions to find the correct value for ? gizmo screenshot gizmo screenshot gizmo screenshot gizmo screenshot
The option that has the two vertical probes in the proper positions to find the correct value for AT is the first graph.
What is the Vertical probe card?The Probe cards which are known to be very suited for multi-die testing of general logic products, such as the SoC and microcomputer products, are said to be referred to as vertical-probe.
This is due to the fact that the probe needles are said to be in a vertical positioning to the substrate, the probe card is one that is known as a "vertical-type" probe card.
The option that has the two vertical probes in the proper positions to find the correct value for AT is the first graph.
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See full question below
Which of the following has the two vertical probes in the proper positions to find the correct value for AT?
2.4.3 Test (CST): Get Your Motor Running
Question 14 of 25
When drawing a vector, you should represent the magnitude of the vector by
the length of the arrow.
O
O
A. True
B. False
SUBMIT
Answer: True
Explanation:
When drawing a vector, you should represent the magnitude of the vector by the length of the arrow is true.
What are vectors?
The term "vector" in mathematics and physics is used informally to refer to some values that cannot be stated by a single integer (a scalar) or to certain members of vector spaces. In the past, vectors were first used to represent quantities with both a magnitude and a direction, such as displacements, forces, and velocity, in geometry and physics (usually in mechanics). Similar to how distances, masses, and time are represented by real numbers, these quantities are represented by geometric vectors.
In some circumstances, tuples—finite sequences of numbers with a definite length—are sometimes referred to as vectors.
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Forced airflow that takes place by design between the inside and outside of a building is?
Answer:
Infiltration
Explanation:
If air movement between inside and outside is accidental, we call it infiltration. Approximately two-thirds of U.S. houses, including low-rise condos and townhouses, use forced-air systems to move heating and cooling energy from a central furnace, air conditioner, or heat pump around the house using a duct system.
The forced airflow that takes place by design between the inside and outside a building is known as ventilation.
What is ventilation?A building will always experience "air infiltration" in addition to planned ventilation. This is the unplanned or accidental entry of air to it in to a space from openings and fissures in the built environment.
Exfiltration is the phrase used to describe the equivalent loss from air from a confined space. The porosity of the proposed building and the strength of the wind and temperature's natural driving forces both affect how much air penetration occurs.
When the pressures operating across one of these openings are driven by poor weather rather than purposefully created driving forces, vents and other ventilation design-related holes can also become paths for unintended air movement.
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Two forces with magnitudes of 25n and 18n respectively are inclined at an angle of 120 degrees to each other. calculate the resultant force and the angle it makes with the 18n force
Answer:
ufifufogifsotufidogifidofut
describe the energy transfers taking place as the cyclist starts to pedal
Answer: You pedaling the bike is transforming chemical energy, supplied by the breakdown of the food you eat, into mechanical energy to turn the pedals. The chemical energy is potential and the mechanical energy is kinetic.
Explanation: hope this helps
Answer: At the start of the ride, the cyclist initially has chemical energy stored in his/her body as a result of the cyclist’s food intakes. This chemical energy in the cyclist is then converted to kinetic energy on the bike pedal due to the cyclist applying a downward force upon the bike pedal.
Explanation:
If a trapeze artist rotates once each second while sailing through the air and contracts to reduce her rotational inertia to one-third of what it was, how many rotations per second will result?.
The rotations per second will triple and she will rotate thrice per second.
The rotation of the trapeze artist is not influenced by any external forces or torques during the motion.Therefore, her total rotational momentum ([tex]I \omega[/tex]) should be conserved throughout the motion or during a transition.This question checks your primary understanding of this concept and you have to simply use the formula associated with the rotational momentum from one position to the other (expansion and contraction).The formula is like this, [tex]I_1 \omega_1 = I_2 \omega_2 = \text{constant}[/tex]. Here [tex]I[/tex] and [tex]\omega[/tex] have the usual meanings.Therefore, the calculation would look like the following,[tex]\begin{aligned}\\\\I_1\omega_1&= I_2 \omega_2\\\\I\omega &= \frac{I}{3}.\omega_2\cdots(I\, \text{could be cancelled out})\\\\\omega_2 &= 3I\end{aligned}[/tex]
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Matching Scientists with Atomic Models
Which scientist and atomic model are correctly matched?
Bohr – plum pudding
Thomson – electron cloud surrounds nucleus
Rutherford – plum pudding
Schrödinger – electron cloud surrounds nucleus
The correct answer is option 4 Schrödinger.
The distribution of electrons within Thomson's model's positively charged region of space quickly earned it the informal moniker "plum pudding," since it reminded many scientists of the raisins—then known as "plums"—found in the traditional English delicacy plum pudding.
Erwin Schrodinger's Electron Cloud Model. With the help of this concept, electrons were no longer pictured as being in a fixed orbit around a central nucleus.
In a series of publications published in 1926, Schrödinger addressed the problem of wave functions and electrons. He utilised mathematical calculations to quantify the probability of finding an electron in a particular position in addition to describing what would later be known as the Schrodinger equation, a partial differential equation that explains how the quantum state of a quantum system varies with time.
This served as the foundation for the Schrodinger equation and the Electron Cloud (quantum mechanical) Model, respectively. The Electron Cloud Model, based on quantum theory, which holds that all matter has qualities related to a wave function, is different from the Bohr Model in that it does not specify the precise route of an electron.
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A car moving with an initial speed of 16 meters per second is brought to rest uniformly in 4. 0 seconds. How far does the car travel during this 4. 0-second interval?.
Answer:
the car travels 64 meters.
What are the concentrations of hoac and oac- in a 0.2 m acetate buffer at ph 5.00? the ka for acetic acid is 1.70 x 10-5
The concentration of Hoac and oac in a 0.2 m acetate buffer at ph 5.00 is 0.1178M.
CalculationKa of Acetic Acid= 1.7 x 10^-5.
So pKa= - log (1.7 x10^-5) = 4.7695 ~4.7
But pH= pKa+ log(salt/acid)
pH= 4. 77+log(salt/acid) = 5.00
So, log (salt/ acid) = 5.00- 4.77= 0.23. So, salt/acid= 10^0.23=1.6982.
Therefore, if the concentration of acetate ion (CH3-COO-) is 0.2 M, the concentration of CH3-COOH =0.2/1.6892= 0.1178M
What is the HOAc concentration?The amount of HOAc molecules and OAc- ions are now both present in the same quantity. The concentration of the H3O+ ion at Point B is equal to the value of Ka for the acid since the ratio of the concentrations of HOAc and OAc- is 1:1.
This gives us a means to calculate an acid’s Ka value.
How do you determine an acetate buffer’s pH?You’ll need different amounts of buffer, so check with your instructor or the protocol to see how much you’ll need.
The Henderson-Hasselbalch equation, pH = pKa + log (acetate concentration/acetic acid concentration), can be used to calculate the ratio of acetic acid to acetate concentration.
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the earth's escape speed (the speed you need to get away forever) is about 25,000 miles per hour. escape speed depends on the gravity of the object trying to hold the spacecraft from escaping. based on your understanding of gravity, how will the escape speed from the moon compare to the escape speed from earth?
The Moon's escape velocity is less than the Earth's escape velocity.
We know that,
[tex]V_{e}[/tex] = √ 2 G M / r
where,
[tex]V_{e}[/tex] = Escape velocity
G = Universal gravitational constant
M = Mass of object
r = Radius of object
For the Moon,
G = 6.67 * [tex]10^{-11}[/tex] N m² / kg²
M = 7.35 * [tex]10^{22}[/tex] kg
r = 1737400 m
[tex]V_{e}[/tex] = √ [ 2 ( 6.67 * [tex]10^{-11}[/tex] * 7.35 * [tex]10^{22}[/tex] ) / 1737400 ]
[tex]V_{e}[/tex] = 2375.89 m / s = 5314.72 mil / hr.
Escape speed is the amount of speed required to escape the object's gravitational pull. The size or mass of the object trying to escape does not matter.
Therefore, the Moon's escape velocity is less than the Earth's escape velocity.
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A mass of 0.1kg oscillates in simple harmonic
motion with an amplitude of 0.2m and a period
of 10 second. Calculate the maximum kinetic energy.
The maximum kinetic energy of the mass performing simple harmonic motion is 7.88 joules.
What is Kinetic energy of any general body?The kinetic energy of any body is the energy possessed by the body due to virtue of its motion is called Kinetic energy.
Given in the question is a mass of 0.1 kg oscillating in simple harmonic
motion. From the question, we can write -
Mass [M] = 0.1 kg
Amplitude [A] = 0.2 m
Time period [T] = 10 s
The Kinetic energy of a Simple harmonic motion is given by -
K.E = 1/2 mω²a²cos²(ωt + Φ)
For maximum kinetic energy -
ωt + Φ = 0
Therefore -
K.E [max] = 1/2 mω²a²
Now -
Angular frequency = ω = 2πT = ω = 2 x 3.14 x 10 = 62.8 s
The maximum kinetic energy will be -
K.E [max] = 1/2 mω²a² = 1/2 x 0.1 x 62.8 x 62.8 x 0.2 x 0.2 = 7.88 Joules
Therefore, the maximum kinetic energy of the mass performing simple harmonic motion is 7.88 joules.
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One fitness magazine suggested that the food that you eat is like a battery because it has energy. Do you think that the banana that Mila ate had energy? Explain why you think this.
When food is kept in storage, it has chemical energy as potential. Chemical energy in food is transformed into fuel for our bodies when a person eats it.
Thermal energy, which keeps us warm, is the fuel for our bodies. \
When a human moves, the chemical energy is also transformed into motion. Kinetic energy is the movement.
Because food gives the human body the chemical energy it needs to carry out its daily tasks, the fitness magazine made the comparison between food and a battery in this instance.
The banana is a fruit that contains a lot of carbohydrates and fructose. Because of this, it is a great food to eat before exercise because it gives the muscles the chemical energy they need to perform better both before and after exercise.
The banana is also high in potassium, magnesium, phosphorus, and vitamins a and c, which gives it more strength and energy.
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What were people thinking when they made the helicopter ejector seat….
An ejection seat or ejector seat is a mechanism used in airplanes that is intended to save the pilot or other members of the crew often military personnel in the event of an emergency.
What is the helicopter ejector seat about?In most designs, a rocket motor or explosive charge propels the seat out of the aircraft, taking the pilot with it.
The seat does allow for escape from the helicopter, albeit more as a tractor rocket system than a genuine ejection seat.
The technique first fires explosive bolts to eject the rotor blades, then ejects the canopies, and finally ejects the crew members using tractors. Seconds later, their parachutes automatically open.
It should be noted the ejector seat is for safety.
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which adc compares a known voltage to the unknown measurement voltage, continually adjusting the known voltage until its value equals that of the unknown measured value.
You should also be familiar with the term "reference voltage," which is significant. A known voltage, referred to as the Reference voltage, is compared against an unknown voltage during an ADC conversion to determine its value.
What is reference voltage?An electrical device called a voltage reference produces a fixed voltage in the ideal case regardless of the device's load, changes in the power source, changes in temperature, or the passage of time.
When conditions like source voltage or ambient temperature fluctuate, a voltage reference is a precision device created especially to keep the output voltage constant.
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Using black's classification of cavities, decay in the pit and fissures of the occlusal surface of molars and premolars is considered a class___ restoration or cavity.
Using black's classification of cavities, decay in the pit and fissures of the occlusal surface of molars and premolars is considered a class one restoration or cavity.
What are cavities?
Cavities can be described as permanently damaged areas in the hard surface of your teeth that develop into tiny openings or holes.
Decay in pits and fissures of occlusal surfaces of molars and premolars, the buccal or lingual pits of molars, and the lingual pits of maxillary incisors are referred to as class one restoration or cavity according to Black's classification of cavities.
Cavities when left untreated can cause more serious complications, like a tooth abscess or an infection that gets into your bloodstream, which may in some cases be life threatening.
The causes of cavities being formed might include bacteria, eating too much snacks, sipping sugary drinks and poor teeth cleaning.
In conclusion, cavities might not have symptoms.
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Explain how Science and Society are related?
The science and the society are related because the science plays an important role for the development of the society in many shapes like car, watch, medicines, washing machine and many other things.
Explain how Science and Society are related?
The science plays a very important role for the development of our societies. The science play a variety of functions for the benefits of our society by creating new knowledge, by improving the education and by also increases the quality of our lives.
The science provides many comforts for our society like making the washing machine makes our lives easier because the washing machine takes less time to wash the cloths than by ordinary method.
The science provide us comfort which is in the shape of car because we can covers a lot of distance in very less time than covering the distance by walking.
So we can conclude that the science and the society are related because the science plays an important role for the development of the society in many shapes like car, watch, medicines, washing machine and many other things.
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A jogger takes 3.5 min to run once around a square block that is 220 m on each side. What is the jogger’s average velocity?
Answer:4.2 miles/hour
Explanation:
220 each side = 880 meters total
880/3.5 = 251 is how many meters per minute
multiply by 60 to get per hour
a piece of clay adheres to the outer edge of a wheel of radius 0.700 m. the wheel rotates at a constant rate of 230 rev/min. what is the speed (in m/s) of the piece of clay? m/s
The speed (in m/s) of the piece of clay is 15.394 m/s
a = 338.527 m/[tex]s^{2}[/tex]
The rate at which an object's velocity with respect to time changes is referred to as acceleration In mechanics, acceleration refers to the rate at which an object's velocity with respect to time varies. Acceleration is a vector quantity (in that they have magnitude and direction).
The direction of the net force acting on an object determines the direction of its acceleration.
Is a vector an acceleration?
Yes, since it has both magnitude and direction, acceleration is a vector. The acceleration's magnitude and direction indicate whether or not the object is traveling faster in the same direction as it is being moved. This is an example of both acceleration and deceleration.
Acceleration is the process through which an object's speed changes over time, whereas velocity is the rate at which that object is traveling in a specific direction.
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2 soccer players kick a ball at the same instant. one strike a force of 40N at 0° and the other 30N at 90° from positive x axis. find the resultant force on the ball
The resultant force on the ball is 50 N.
What is resultant force?Reusltant force can be defined as the sum of the force acting on a object.
Note: From the question, the forces from both kicks are at right angle to each other.
And to calculate the resultant force on the ball, we use the formula below.
Formula:
R = √(P²+Q²)........... Equation 1From the question,
Given:
P = 40 NQ = 30 NSubstitute these values into equation 1
R = √(40²+30²)R = √(1600+900)R = √(2500)R = 50 NHence, the resultant force on the ball is 50 N.
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What is s = vt - 1/2at^2 used for?
Answer:
See below
Explanation:
The position or displacement (s) of a body is given by
the original velocity times time - 1/2 acceleration times time ^2
The minus sign indicates this may be a gravity acceleration (9.81 m/s^2 or 32.2 ft/s^2 ) of a free falling body
THIS equation also indicates that the INITIAL position,s is equal to zero
the full equation is more like this
sf = so + vo t + 1/2 a t^2
sf = final position so = original position vo = original velocity
according to the classification system in chapter 2, the information about how to make a microwave oven would be classified as , whereas a microwave oven would be classified as .
The area of the kitchen counter and the space needed for the microwave oven.
What is a microwave oven?The term "microwave oven" refers to an electric oven that cooks and warms food using electromagnetic radiation with a microwave frequency range. Dielectric heating is used to heat the meal as a result, which allows the polar molecules to rotate and release heat energy. Microwave ovens heat food quickly and efficiently because excitation is rather homogenous in the outer 25–38 mm (1–1.5 inches) of a homogeneous, high water content food item.
A variety of dishes can be cooked in the ubiquitous microwave oven, which can also be used to reheat previously prepared food.
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