194 V/m is the amplitude of the oscillating electric field.
What is oscillating electric field?An oscillating electric field is an electric field that changes its magnitude and direction over time. It is usually described as an alternating current (AC) electric field, which means the electric field varies cyclically, as the current alternately reverses direction. Oscillating electric fields are used in many applications, such as radar and radio communication, wireless power transfer, and medical imaging. They can also be used to create plasma and control particles in particle accelerators.
In order to find electric field, we can use the formula of power density
Pd = E^2 / Z
where:
Pd = power density in W/m^2
Pd = 5mW/cm^2 = 50 W/m^2
E = electric field strength in V/m
Z = impedance of free space = 120 * PI
re-arrange for E
E = sqrt(Pd * Z)
E = 137.3 V/m Note that this is the RMS value.
The peak amplitude of the oscillating field will therefore be 137.3 * sqrt(2) = 194 V/m
Therefore, 194 V/m is the answer.
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Consider the circuit shown in (Figure 1). Assume 1 =0.92 A. Part A What is the value of resistor R? Express your answer with the appropriate units. % R = Value Figure 1 of 1 Submit Previous Answers Request Answer 2.00 A Incorrect; Try Again; 2 attempts remaining Provide Feedback 10 15 Q
The maximum Current is 19.57 ohm, as mentioned inside the paragraph preceding.
What is a definition of a circuit simple?A circuit in electronics is a totally circular path that electricity passes through. A current source, wires, and a load are the components of a basic circuit. Any ongoing channel for the conveyance of energy, info, or a signal is referred to as a "circuit" in a wide sense.
Voltage across the left 10 ohm resistance is V = IR = 0.92A * 10 ohm = 9.2 V
Thus this is the voltage across the 15 ohm and R
Therefore the current in the 15 ohm = 9.2/15 = 0.61 A
Kirchoff's current law states that current in = current out
So, from the 10 ohm & 15 ohm resistors, 2A is entering, while 0.92 + 0.61 are exiting.
Let current from R resistance is I₁
So, 2A = 0.92 + 0.61 + I₁
I₁ = 0.47A
For Resistance R,
V = I₁R
R = V/I₁ = 9.2/0.47
R = 19.57 ohm
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a single electron orbits a lithium nucleus that contains three protons ( 3e). the radius of the orbit is 1.76 10-11 m. determine the kinetic energy of the electron.
The kinetic energy of the electron orbits a lithium nucleus that contains three protons ( 3e) whose radius of the orbit is 1.76x10-11 m is 123eV.
Given the lithium nucleus contains 3 protons also 3 electrons
The radius of orbit (r) = 1.76x10-11 m
We know the resultant force acting on the nucleus is F.
F = k x q(nu) x q(e)/r^2 = k x (3e) x(e) /r^2 = 3ke^2/r^2
This force is equal to centripetal force = mv^2/r where m is mass of electron, v is velocity
Then 3ke^2/r^2 = mv^2/r
3ke^2/r = mv^2
The kinetic energy is taken as (KE) = 1/2mv^2 = 3ke^2/2r
Here k = 8.99 x 10^9 Nm^2/C^2 and the charge on electron
(e) = 1.6 x 10^-19C
Then KE = 3 x 8.99 x 10^9 x ( 1.6 x 10^-19)^2 / 2 x 1.76x10-11
KE = 1.96 x 10^-17J = 122.6eV
Hence the required kinetic energy of the electron is 123eV.
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what is the escape speed for an electron initially at rest on the surface of a sphere with radius of 1.0 cm and a uniformly distributed charge of 1.5*10^-15
v = 22.492 k ms-1 is the escape speed of an electron that is initially at rest on the surface of a sphere.
What do orbital and escape speeds mean?The bare minimum speed required to reach infinity and escape the gravitational pull of a massive body is known as escape velocity. The orbital velocity of a body around which a small object revolves is referred to as orbital velocity. The link between orbital velocity and escape velocity is proportional.
What is the short definition of escape speed?The minimal speed necessary for an object to disengage from the gravitational pull of a large object is known as escape speed, often referred to as escape velocity. For instance, if we think of the earth as a large body.
1/2mv²= kqQ/r
v= √2kqQ/rm
v= √2×(9×10⁹)×(1.6×10⁻¹⁹)×(1.6×10⁻¹⁵)/(0.01)×(9.109×10⁻³¹)
v = 22492 ms^-1
v = 22.492 k ms^-1
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A car uses its brakes to stop on a level road.
during this process, there must be a conversion
of kinetic energy into
(1) light energy
(2) nuclear energy
(3) gravitational potential energy
(4) internal energy
Light is a type of electromagnetic radiation with a wavelength that the human eye can perceive. Kinetic energy is what it is. There needs to be a conversion during this process.
Is light energy kinetic or potential?
Kinetic energy must be transformed into the following forms of energy: (1) light energy, (2) nuclear energy, (3) gravitational potential energy, and (4) internal energy.
Can you describe nuclear energy as potential energy?
Kinetic and potential energy can take on a variety of shapes. The energy of gravity is one of them, along with mechanical, chemical, heat, electrical, optical, and nuclear energy.
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True or False: There must be equal amounts of mass on both sides of the center of mass of an object? (Hint: Thinking about a situation involving point masses will help you answer this question) and Why is this so?
False. There does not have to be equal amounts of mass on both sides of the center of mass of an object.
What is mass?Mass is a fundamental physical property of an object or system that measures its resistance to being accelerated by a force. Mass is measured in kilograms, grams, or pounds. It is also a measure of the amount of matter present in an object or system. Mass is related to the inertia of an object; the greater the mass, the greater the inertia. In physics, mass is also used to describe the amount of energy stored in an object due to its motion.
This is because the center of mass is determined by the balanced distribution of mass across the object. If a point mass is located far away from the center of mass, the gravitational pull of that mass does not need to be countered by an equal amount of mass on the opposite side of the center of mass for the object to be balanced. Instead, the influence of the point mass on the center of mass is much smaller than the influence of the mass close to the center of mass.
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Please help thank you!!
The blood that is leaving at B has a lower concentration of carbon dioxide.
What is the blood?We know that the blood can be shown to be a very important part of the circulatory system of the body of the individual. We know that the circulatory system is in charge of the movement of the blood and the lymph in the body.
Let us also recall that there is a very important interplay between the circulatory system and the respiratory system because in the both systems, there is the exchange of materials as we can see in the image.
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your first response to reduced visibility should be: select one: a. looking for road edge markings to guide you. b. reducing your speed. c. turning on your windshield wipers. d. turning on your headlights.
Your first response to reduced visibility should be reducing your speed.
What does getting visible entail?The term "visibility" refers to how far or well you are seeing in a certain meteorological scenario. Poor visibility prevailed. 2. a noncount noun When something is said to be visible, such as a situation or an issue, it refers to how much it is observed or observed by other people.
What, for instance, does visibility mean?Visibility can indicate both "how well you can see" and "how well others will see something." Your running leggings' reflective stripes make you visible in the dark as they make you more visible to others.
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An electric car of mass 1000kg uses twenty five 12v batteries connected together to create a p.d. of 300V. The car accelerates from rest to a speed of 30ms^-1 in 12 seconds.
a) what is the final kinetic energy of the car?
b) what is the power of the car?
c) How much electrical current flows from the battery?
What assumptions have you made in calculating a) to c)?
Answer:
Explanation:
a) The final kinetic energy of the car is equal to the work done in accelerating the car from rest to a speed of 30ms^-1. Therefore, the final kinetic energy of the car is equal to:
KE = ½ mv^2 = ½(1000kg)(30ms^-1)^2 = 450,000 J
b) The power of the car can be calculated by dividing the work done by the time taken for the acceleration. Therefore, the power of the car is equal to:
Power = Work/Time = 450,000 J/12s = 37,500 W
c) The electrical current flowing from the battery can be calculated by dividing the power by the voltage of the battery. Therefore, the electrical current flowing from the battery is equal to:
Current = Power/Voltage = 37,500 W/300V = 125 A
Assumptions:
1. The car is assumed to be moving in a straight line with no friction.
2. The batteries are assumed to be wired correctly and in good condition.
3. The car is assumed to have a constant acceleration over the 12s period.
4. The voltage of the battery is assumed to remain constant over the 12s period.
an airplane is heading east at 400 knots then encounters a wnd with a velocity of 50 knots blowing toward the northeast. determine the direction of the airplane when it encounters the wind
The direction of the airplane when it encounters the wind is approximately northeast. determine the direction of the airplane when it encounters the wind.
What is airplane ?
An airplane is a powered, fixed-wing aircraft that is propelled forward by thrust from a jet engine or propeller. Airplanes come in a variety of sizes, shapes, and wing configurations. The airplane is one of the most important forms of transportation, allowing for rapid and efficient travel across distances both near and far.
Airplanes are used for commercial air travel, military operations, private aviation, cargo transport, and leisure activities. To fly an airplane, a pilot must be knowledgeable in aviation regulations, safety protocols, and aircraft mechanics. With advances in technology, airplanes have become increasingly sophisticated, providing a safe and comfortable way to travel.
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reen light is 550 nm (0.00000055 meters), and light moves at 299,792,458 m/s, what is the frequency of the green light?
The frequency of the green light is approximately 5.45×10¹⁴ Hz, for wavelength 550nm.
What is frequency?Frequency is the dimension of the number of times that a repeated event occurs per unit of time.
The frequency of wave-like patterns including sound, electromagnetic waves (similar as radio or light), electrical signals, or other swells, expresses the number of cycles of the repetitious waveform per second.
In SI unit is 1 Hz means one cycle (or wave) per second.
The frequency of a wave can be calculated by using the equation:
frequency (f) = velocity (v) / wavelength (λ)
In the case of green light, the velocity is given as 299,792,458 m/s and the wavelength is given as 550 nm (0.00000055 meters). upon placing the values in the equation,
f = 299,792,458 m/s / 0.00000055 m
To get the frequency of the green light in hertz (Hz), which is the unit of frequency in the International System of Units (SI).
f = 5.454545454545454545454545454545e+14 Hz
So, the frequency of the green light will be approximately 5.45×10¹⁴ Hz.
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An airplane passenger carries a 215-n suitcase up the stairs, a
displacement of 4.20 m vertically and 4.60 m horizontally.
a) how much work does the passenger do on the suitcase?
b) the same carries the same suitcase back down the same set of stairs. how much work does the passenger do on the suitcase to carry it down the stairs?
b) Work = force x displacement = 215 N x (-4.60 m) = -992.5 J. the same carries the same suitcase back down the same set of stairs. how much work does the passenger do on the suitcase to carry it down the stairs.
what is work ?
Work is an activity that involves physical or mental effort undertaken in order to achieve a result. It is usually done in exchange for money, but can also be done out of necessity or for pleasure. Work is often seen as an important part of life and it can come in many different forms, ranging from manual labour to professional and creative work.
Work can be rewarding and provide a sense of purpose and achievement for those who engage in it. It can also be a source of stress, especially when it is not well-suited to an individual’s skills or needs. The type of work an individual does can vary depending on their skills, interests, and resources. Working can help to build relationships, develop skills, and provide financial security.
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When laser light of wavelength 632.8 nm passes through a diffraction grating, the first bright spots occur at +/1 17.8 degrees from the central maximum.
(a) What is the line density (in lines/cm) of this grating?
(b) How many additional pares of bright spots are there beyond the first bright spots?
(a) The line density of the given grating is calculated to be 4831 lines / cm.
(b) There are two additional pares of bright spots beyond the first bright spot. θ₂ = 37.7° and θ₃ = 66.5°
(a) Given that,
λ = 632.8 nm = 632.8 × 10⁻⁹ m
θ₁ = ± 17.8
We know that the brilliant fringes' angle is determined by,
sin θ = mλ/d
For first bright fringe, m = ± 1
sin θ₁ = λ/d ----(1)
Line density of this grating is given by, N = 1/d ----(2)
Making d as subject in (1), we have,
d = λ/ sin θ₁ ----(3)
Putting (3) in (2), we have,
N = sin θ₁/ λ = sin 17.8/(632.8 × 10⁻⁹) = 4.831 × 10⁵ line/m = (4.831 × 10⁵ lines/ 1m) × (1 m/100 cm) = 4831 lines / cm
(b) We know, d sin θ = m λ
So, d = m λ/sin θ = (632.8 × 10⁻⁹/sin 17.8) = 2067.4 × 10⁻⁹ m
Line density = 10⁻² / (2067.4 × 10⁻⁹) = 4830 lines/cm
To get additional bright spots, we take the condition sin θm < 1 which gives,
sin θ₂ = 2 sin θ₁ = 2× 0.3056 = 0.62
θ₂ = 37.7°
sin θ₃ = 3 sin θ₁ = 3 × 0.31 = 0.93
θ₃ = 66.5°
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Of the blocks listed below, which combination of materials will have the highest resistance to sliding?block Weight FrictionA 150lb 30lbB 20N 5NC 1,800lb 60lb
The higher the weight, the greater the static friction force, and the higher the resistance to sliding. Therefore, the combination with the highest resistance to sliding is C) 1,800lb 60lb.
What is static friction force?Static friction force is the force that resists two objects from moving relative to each other. It is the force that is generated when two objects are in contact with each other and in a stationary state. This force is also referred to as the static coefficient of friction. It is a force that is always present between two surfaces when they are in contact. The magnitude of this force is dependent upon the nature of the surfaces and the amount of force applied to the surfaces. The magnitude of static friction force is usually greater than the kinetic friction force. Therefore, it is necessary to overcome static friction in order to initiate movement between two objects.
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Complete Question:
Of the blocks listed below, which combination of materials will have the highest resistance to sliding?block Weight Friction
A) 150lb 30lb
B) 20N 5N
C) 1,800lb 60lb.
D) non of these
you measured a force of [var:force meas] n. the glider in your trial has a mass of [var:mass] g. what equation allows you to calculate acceleration using the force and mass?
The equation allows you to calculate acceleration using the force and mass is F=m. Where m is mass and a is acceleration.
What is the relationship between force and acceleration?According to Newton's second rule of motion, a body's rate of momentum change is directly proportional to the force being applied to it, and momentum change occurs in the direction the force is being applied.
Explain what is acceleration?Acceleration is the rate at which velocity changes over time in both speed and direction. Acceleration refers to the change in speed or direction of an item or point travelling straight forward. Due to the constantly changing direction of motion around a circle, motion even at constant speed accelerates.
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A farsighted person has a near point of 72 cm rather than the normal 25 cm. What strength lens, in diopters, should be prescribed to correct this vision problem?
The strength lens to be prescribed to correct this vision problem is 2.61 diopters.
Near point = 72cm
Normal point = 25cm
Using the lens formula -
1/f = 1/u + 1/v
where
f is the focal length
v is the image distance
u is the object distance
Substituting the values in the formula -
1/f = 1/25 + 1/(-72)
1/f = 0.0261
f = 1/0.0261
Therefore,
f = 38.31
f = 0.383m
Now, since the dioptric power is inverse of the focal length strength;
Therefore,
D = 1/f
= 1/ 0.383
= 2.61
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under what conditions can an object be treated as a particle? (note that some quiz questions have multiple correct answer. the check box is square instead of round on these questions.) select one or more: a. object must be able to be treated as round b. forces on object must be concurrent c. object must not deform under the forces d. object must not change shape e. object must not be large f. object must not rotate
Forces on object must be concurrent. Object must not deform under the forces. Object must not change shape. Object must not be large. Object must not rotate.
What is force?Force is a physical quantity that represents the interaction between two objects. Force can cause an object to accelerate or change its velocity. It can also cause a change in an object's shape or orientation. There are several types of force, such as gravitational force, electromagnetic force, and nuclear force.
An object can be treated as a particle under the following conditions:
Forces on object must be concurrent. Object must not deform under the forces. Object must not change shape. Object must not be large. Object must not rotate.
It's important to note that the concept of treating an object as a particle is a simplifying assumption used in some branches of physics, such as mechanics, and is only valid under certain conditions.
When an object is treated as a particle, it is assumed to have no internal structure, and that all forces acting on it act at a single point. The object is also assumed to be small enough that its deformation or shape change under forces can be ignored. Additionally, it is also assumed that the object does not rotate.
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How many seconds would it take a conveyor belt to do 40 J of work using a 15 W motor? Round to one decimal.
Answer:
Explanation:
The amount of time it would take for a conveyor belt to do 40 J of work using a 15 W motor can be calculated by dividing the amount of work (40 J) by the power (15 W). This gives us a time of 2.67 seconds. Rounded to one decimal, this would be 2.7 seconds.
a ball is thrown vertically upward. what is the nearest value of its acceleration when it reaches its maximum height?
The acceleration of the ball when it reaches its maximum height is approximately 9.8 m/s2.
What is accelaration?Acceleration is the rate of change of velocity over time. It is a vector quantity, meaning it has both magnitude and direction. Acceleration can be caused by forces, such as gravity, friction, or thrust. It is a measure of how quickly an object is speeding up, slowing down, or changing direction. Acceleration can be positive, negative, or zero. Positive acceleration means an object is speeding up, while negative acceleration means an object is slowing down. Zero acceleration means an object is going at a constant speed in a straight line.
The acceleration of a ball thrown vertically upward when it reaches its maximum height is approximately equal to the acceleration due to gravity, or 9.8 m/s2. This is because the ball is no longer being propelled upwards and is instead falling back down to the ground. Thus, the acceleration of the ball when it reaches its maximum height is approximately 9.8 m/s2.
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can you write the steps of how we can answer this qustion
Answer:
5 sec
Explanation:
[tex]99 \div 21.8 [/tex]
the density of gold is 19.3 g/cm3. what is the mass of a cube of gold that is 2.50 cm long on each edge?
It is possible to measure a material's density by how closely it is packed. The mass per unit volume is how it is formally defined.
Examples of dense materials include iron, platinum, and lead. Dense material can be found in many different rock and mineral kinds. The relationship between a substance's mass and volume is what is referred to as its density. kilograms per cubic metre (kg/m3) is used to measure density in the SI system.
density = mass/ volume
rearranging formula we get
mass = density / volume
From the question
side of cube of gold = 2.50 g
volume of cube of gold = (2.50)³
Density = 19.3 g/cm³
Fill in the variables in the formula above to find the mass.
Mass is equal to 19.3 / (2.50)3 = 48.25.
Consequently, the gold cube's weight is 48.25 g.
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4. make a prediction: if you were to chop this magnet in half, what would be the polarity of each piece? why?
This magnet may be divided in half to create two separate magnets, each featuring their own arrays of northern and southern magnetic poles. This is due to the absence of magnetic monopoles in nature.
What is magnet, exactly?Any substance that can draw iron and create a magnetic field around itself is a magnet. All known elements and several compounds had been investigated for magnetism by the end of 19th century, and it was discovered that every one of them has some sort of magnetic characteristic.
This demonstrates that magnetic monopoles cannot be created from a bar magnet. It is impossible for a bar to be split in two in order that one half possesses the magnetic north pole and the other the magnetic south pole. Instead, the east and west poles of each magnet will be unique.
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What frequency does a photon of wavelength 4.5×[tex]10^{-4}[/tex]m have?
A.1.35×[tex]10^{5}[/tex] Hz
B.2.98×[tex]10^{-37}[/tex] Hz
C.1.47×[tex]10^{-30}[/tex] Hz
D.6.67×[tex]10^{11}[/tex] Hz
Answer:
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. the resultant of two forces acting at a point at right angles to each other is 40 pounds. if one of the forces is 30 pounds, what is the other force and what angles does it make with the resultant force?
The resultant force will be 50pound .
A force is an influence that has the power to alter an object's motion. A force can cause an object with mass to accelerate when it changes its velocity, for as when it moves away from rest. An obvious way to describe force is as a push or a pull. A force is a vector quantity since it has both magnitude and direction. It is calculated using the newton SI unit (N).
We are given that,
F₁ = 40pound
F₂ = 30 pound
Fr = ?
The square root of the sum of the squares of the two forces can be used to determine the resultant of the two forces as follows,
Fr = √F²₁ + F²₂
Putting the value in above equation ,
Fr = √40² + 30²
Fr = √1600 + 900
Fr = 50pound
Therefore , the resultant force would be 50pounds.
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What are the effects of warm temperature on gas particles
Answer:
They move and collide faster.
Explanation:
This is because increasing the temperature increases the kinetic energy of the gas particles. As a result they move rapidly having more more frequent collisions.
Answer:
When the temperature of the container increases, the kinetic energy of the gas molecule becomes high.
Explanation:
This means the collision rate of the particles increases. Due to the collision of gas particles, the pressure increases across the wall of the container.
which principle describes the uniform nature of pressure throughout a fluid? responses pascal's principle pascal's principle principle of buoyancy principle of buoyancy newton's principle newton's principle bernoulli's principle
The principle that describes the uniform nature of pressure throughout a fluid is Pascal's Principle.
What does Pascal's principle state?
Pascal's principle states that when a pressure is applied to a confined fluid, the pressure is transmitted undiminished and equally in all directions throughout the fluid. This means that if an external force is applied to a confined fluid (like a gas or liquid), this force will be evenly distributed throughout the entire container, no matter where it is applied. For example, if you were to press down on a piston in a cylinder filled with oil, the same pressure would be felt on the other side of the cylinder as well.
This principle states that "pressure applied at any point in a confined incompressible fluid is transmitted undiminished to every part of the fluid and to the walls of the containing vessel." This explains why pressure is constant throughout a fluid since any applied pressure is distributed evenly to every portion of the fluid.
Therefore, Pascal's Principle is the correct answer.
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an astronomer observes the light of a galaxy that is 600 million light-years away. how old is the light?
"An astronomer observes the light of a galaxy that is 600 million light-years away. The age of light is 18.92 × 10¹⁵ s."
Given that,
Distance to the galaxy = 600 million light years = 600× 10⁶ light years = 6×10⁸ light years
We know the speed of light as, c = 3 × 10⁸ m/s
The relation between distance, speed and time is known to be,
Distance = Speed × Time
So, to know the age of time, let us make time as subject,
Time = Distance/Speed
1 light year = 9.46 × 10¹⁵ m
Putting in the above values,
Time = (6×10⁸ × 9.46 × 10¹⁵)/(3 × 10⁸) = 18.92 × 10¹⁵ s
Thus, the age of light is 18.92 × 10¹⁵ s.
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by what multiplicative factor rk does the initial kinetic energy increase, and by what multiplicative factor rw does the work done by the force increase (with respect to the case when the particle had a mass m )? if one of the quantities doubles, for instance, it would increase by a factor of 2. if a quantity stays the same, then the multiplicative factor would be 1. you should enter the two factors separated by a comma.
The multiplicative factor rk for the initial kinetic energy is 2, as the kinetic energy doubles when the mass doubles.
What is kinetic energy?Kinetic energy is the energy possessed by an object due to its motion. It is equal to the work done to accelerate the object from rest to its current velocity. Kinetic energy is associated with the motion of an object and is measured in joules (J). Kinetic energy is one of the most important forms of energy, as it is involved in many physical and chemical processes. Kinetic energy is also related to velocity, and can be calculated using the formula KE = ½ mv2, where m is the mass of the object and v is its velocity.
The multiplicative factor rw for the work done by the force is 1, as the work done by the force does not change when the mass of the particle changes.
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The figures below show a ball traveling on a flat surface in a circular path. You are looking down at the ball. Which figure correctly depicts what happens if a portion of the wall is removed?
Centripetal force is the force that prevents an object from travelling in a straight line while it is moving due to its speed in a particular direction, or its velocity.
What type of movement is circular rotation?While an object moves because of its speed in a certain direction, or its velocity, centripetal force is the force that keeps the object moving in a circular motion. By pushing an object in the direction of the circle's centre, it achieves this.
The friction between the tyres and the road causes the centripetal force that makes the car turn in a circular motion. The car will move in a larger-radius curve and exit the road if the coefficient of friction is not at a minimum.
The rotating motion known as circular motion involves a rigid body moving in a plane while maintaining a constant distance between its centre of mass and its axis of rotation.
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Ultrasound waves are used to measure blood- flow speeds. Suppose a device emits sound at 500 kHz, and the speed of sound in human tissue is taken to be 1540 m/s. What is the expected beat frequency if blood is flowing normally in large leg arter- ies at 2.0 cm/ s directly away from the sound source? How can you connect this analogue to the radars for example?
Since the relative velocity of the sound source and the blood flow is zero, the beat frequency is zero.
How to solve this problem?The expected beat frequency can be calculated using the Doppler shift formula, which states that the beat frequency (f) is equal to the difference between the emitted frequency (f0) and the received frequency (f) multiplied by the speed of sound in the medium (c) divided by the relative velocity of the blood flow (v) and the sound source.
f = (f0 - f) * c / (v + c)
Plugging in the given values:
f = (500 kHz - 500 kHz) * 1540 m/s / (2.0 cm/s + 1540 m/s)
f = 0 Hz
Since the relative velocity of the sound source and the blood flow is zero, the beat frequency is zero.
bund waves are similar to radar waves in that they both use sound waves to measure the distance and speed of objects. However, radar uses radio waves instead of sound waves, and it is typically used for detecting objects at a greater distance and at a higher speed than ultrasound.
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a 500-kilogram sports car accelerates uniformly from rest, reaching a speed of 30 meters per second in 6 seconds. what distance has the car traveled during the 6 seconds? select all that apply
The distance has the car traveled during the 6 seconds is 90 m.
What does the acceleration means?The rate during which velocity change is called acceleration. Acceleration usually indicates a change in speed, but not often. An object that pursues a circular route while keeping a constant speed is still moving forward because the vector of its motion is altering.
Given -
Mass m = 500kg
Initial velocity ,u = 0
Final velocity ,v = 30 m/s
Time , t = 6s
So, acceleration , a =?
By using first equation of motion = v= u+at
= 30 = 0+ a ×6
=30 = 0+6a
=6a = 30 = a = 30/6 = a = 5m/s^2
So, distance travelled = s= ?
By using second equation of motion = s = ut+ 1/2 at^2
= s = 0× 6+1/2×5×6×6
s = 0+90
s= 90 m
so the answer is = 90m
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