a jet fighter pilot wishes to accelerate from rest at 5 g to reach mach-3 (three times the speed of sound) as quickly as possible. experimental tests reveal that he will black out if this acceleration lasts for more than 4.9 s . use 331 m/s for the speed of sound.
Answers
The greatest speed pilot can reach with an acceleration of 5g before he blacks out is 240 m/s.
The acceleration due to gravity is g.
g = 9.8 m/s²
The acceleration of the jet is,
\(Acceleration = Mass \times Gravity\)
\(a = m \times g\)
\(a = 5 \times 9.8\)
\(a = 49 \: m/s ^{2} \)
The acceleration of the jet is 49 m/s².
Let the speed of sound be v.
\(v = 331 \: m/s\)
Let the initial velocity of the jet be
\(Let \: the \: initial \: velocity \: of \: the \: jet \: \)
\(be \: v _i.\)
\(v _i = 0\)
The time at which the pilot will black out with 49 m/s² acceleration = 4.9 s
Let the time taken to reach Mach 3 be t.
Then the final velocity will be,
\(v _f = 3 \times v\)
\(v _f = 3 \times 331\)
\(v _f = 993 \: m/s\)
\(v _f = v _i + at\)
\(993 = 0 + (49)t\)
\(t = 20.26 \: s\)
Thus, the time taken to reach Mach 3 is 20.26 s.it is greater than the time interval at which the pilot will black out. So the pilot will black out.
The greatest speed pilot can reach with an acceleration of 5g before he blacks out is,
\(v _f = 0 +( 49 \times 4.9)\)
\(v _f = 240.1 \: m/s\)
Therefore, the greatest speed pilot can reach with an acceleration of 5g before he blacks out is 240 m/s.
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Related Questions
3. Riddle:
I am black when you buy me, red when you use me and grey when you throw me away.
What am I?
Answers
Answer:
The answer is charcoal
Answer:
Charcoal
Explanation:
While eating lunch high up in a skyscraper, two construction workers calculate their gravitational potential
energies, and find them to be equal. If the lighter construction worker has a mass of 90kg, and the other worker
is twice as high up in the skyscraper, what is the mass of the other worker?
Answers
Answer:
The mass of the other worker is 45 kg
Explanation:
The given parameters are;
The gravitational potential energy of one construction worker = The gravitational potential energy of the other construction worker
The mass of the lighter construction worker, m₁ = 90 kg
The height level of the lighter construction worker's location = h₁
The height level of the other construction worker's location = h₂ = 2·h₁
The gravitational potential energy, P.E., is given as follows;
P.E. = m·g·h
Where;
m = The mass of the object at height
g = The acceleration due to gravity
h = The height at which is located
Let P.E.₁ represent the gravitational potential energy of one construction worker and let P.E.₂ represent the gravitational potential energy of the other construction worker
We have;
P.E.₁ = P.E.₂
Therefore;
m₁·g·h₁ = m₂·g·h₂
h₂ = 2·h₁
We have;
m₁·g·h₁ = m₂·g·2·h₁
m₁ = 2·m₂
90 kg = 2 × m₂
m₂ = (90 kg)/2 = 45 kg
The mass of the other construction worker is 45 kg.
Q2 (a) A radar, with coordinates (0,0), has coverage with length of d. While the second radar, with identical coverage, is situated on the east side of the first one. Using signal intersection, both radars detect an object coming closer to the southern direction in the first quadrant. Note that radars swap the covered area into circles.
i) Identify position of the object in terms of distance and angle. Complete your answer with a sketch.
ii) Analyze and calculate the overlapping area from the radar signals intersection at the first quadrant.
Answers
Considering the coordinates of the radars as well as the direction of the object in order to determine the object's position in terms of distance and angle. Sincе thе radars arе situatеd at (0,0) and thе sеcond radar is on thе еast sidе of thе first onе, wе can assumе that thе first radar is locatеd on thе x-pivot and thе sеcond radar is locatеd on thе positivе y-hub.
Lеt's say thе objеct is dеtеctеd at coordinatеs (x, y). The objесt's y-coordinativity will be negative and its x-coordinativity positive as it approaches the southern direction in the first quadrant.
We can use the distancе formula to determine the object's diameter from its origin (0, 0):
Distancée = (x + y) 2 The angle can be calculated with trigonometry. The angle can be summarized as:
= arctan(y/x) ii) We must consider the circles of overlap for each radar in order to calculate the overlap from the radar signal intersection in the first quadrant.
Due to the fact that both radars have distinctive overlap and divide the covered area into circles, the overlapped area will be the intersection of these circles.
Thе ovеrlapping arеa can bе calculatеd by finding thе arеa of thе intеrsеction of two circlеs. The formula for the area of the intersection of two circles can be complex and depends on the specific radii and dimensions that exist between the circles' centers.
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relative means
"not fixed, not absolute." What
does relative mean when you
use it as a noun?
Answers
Answer:As a noun relative means a person who is connected with others by blood.
Someone who is related to you is a member of your family. All family members include parents, siblings, uncles, aunts, grandparents, cousins, nieces, and nephews. A relative may be related to your family by marriage or by blood.
The science of calculating one object's motion in relation to another moving object is known as relative motion. As a result, the motion is calculated relative to the other moving item rather than the earth, as if the object were in a static condition.
Any amount that is measured in relation to a standard quantity or another specific quantity is said to be relative.
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Carbon-14 is the typical radioisotope used to date materials; however, it has a limitation to 40,000 years. A scientist who wants to date materials older than 40,000 years would most likely use which radioisotope? uranium-238 rubidium-91 iodine-131 cobalt-60
Answers
Answer:
the only one of these materials that allows studying processes of a very long period of time is Uranium 238
Explanation:
In a radioactive material, half of the atoms decay each life period, in carbon 14 this period T = 5730 years, so for a time of 40,000 years there are 7 life periods, so there are very few atoms left without decomposing .
To study older samples, materials with a longer life period are needed, let's show the visa time
²³⁸U T= 4.5 10¹⁰ years
⁹¹Rb T = 58 s
¹³¹I T= 8.04 days
⁶⁰Co T= 5.27 years
Therefore, the only one of these materials that allows studying processes of a very long period of time is Uranium 238
Answer:
A) Uranium-238 is the correct answer.
WHAT IS SOUND? EXPLAIN ITS WAVES
Answers
Answer:
sound is made up of vibrations or sound waves that we can hear these sound waves are formed by objects
Answer:
Sound wave consists to vibrating particles.These knock into other particles causing them to vibrate,and so the sound can travel away from the source.You can hear sound because the vibration in the air cause your ear drums to vibrate this vibration is converted into signals which travel down a nerve to your brain.
Explanation:
hpe its help
A student pulls a block across the desk in physics class. He applies 14N of
tension in the string, but friction holds the box back with 4N. His partner
measures the acceleration of the box across the desk to be 2m/s2. What
must the mass of the box be?
100 Pointsss hellppp
Answers
can you please show a picture
A boy of mass 70kg climbed a hill 1000m high. Calculate the maximum energy gain by the boy
Answers
The maximum energy gain of the boy can be calculated by multiplying his mass (70kg) by the gravitational acceleration (9.81 m/s^2) and the height of the hill (1000m), which gives a value of 686700 J or 686.7 kJ.
The formula E = mgh, where E is the energy gain, m is the boy's mass, g is the acceleration from gravity, and h is the height of the hill, may be used to determine the boy's maximum energy gain. In this instance, the youngster weighs 70 kg, the acceleration caused by gravity is 9.81 m/s^2, and the slope is 1000 metres high. The formula yields E = 70 kg x 9.81 m/s^2 x 1000 m = 686700 J or 686.7 kJ when we insert these numbers. This indicates that throughout his ascent of the hill, the youngster expended a total of 686.7 kilojoules of energy.
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Which provides evidence of universe expansion that supports the Big Bang Theory? Select the three correct answers. (2 points)
An enormous amount of weak background radiation has been detected in the universe.
The temperature of the universe is decreasing.
The temperature of Cosmic Microwave Background radiation varies widely from one part of the universe to another
Galaxies are moving away from each other.
The universe is undergoing a cycle of contraction and expansion
The temperature of the universe is increasing.
Answers
The Big Bang Theory is a theory that describes the origin of the Universe. This theory was first proposed by the Belgian cosmologist G. Lemaitre in 1931.
The evidence of universe expansion that supports the Big Bang Theory is the observation that the temperature of the universe is decreasing.According to this theory, the Universe is continuously expanding as it becomes cooler.The most important lines of evidence that support the Big Bang Theory include:
The observed expansion of the space in the Universe.The discovery of the cosmic microwave background radiation (CMB) is believed to be leftover radiation from the Big Bang.Learn more in:
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Answer:
-the Temperature of the universe is decreasing
- An enormous amount of weak background radiation has been detected in the Universe
-Galaxies are moving away from each other
Explanation:
that's all the answers
on an optical bench, a student places a small screen and a light source 54cm apart. the student then slowly moves a lens along the optical bench from the light source toward the screen. the student measures distances of 18cm and 36cm between the lens and the light source at two locations where a clear image is produced on the screen. what kind of lens did the student use, and what is the focal length of the lens?
Answers
The lens is a converging lens with a focal length of 12 cm.
The situation described in the problem is consistent with the use of a converging lens, which is also called a convex lens. When a converging lens is placed between a light source and a screen, it can form a real image of the light source on the screen.
The distance between the lens and the light source at which the image is formed depends on the focal length of the lens and the distance between the lens and the screen.
Let's call the focal length of the lens "f", the distance between the light source and the lens "d₁", and the distance between the lens and the screen "d₂". According to thin lens equation;
1/f = 1/d₁ + 1/d₂
When the lens is positioned at the first location where a clear image is produced on the screen, the distances are;
d₁ = 18 cm
d₂ = 54 - 18 = 36 cm
Plugging these values into the thin lens equation, we get;
1/f = 1/18 + 1/36
1/f = 1/12
f = 12 cm
Therefore, the focal length of the lens will be 12 cm.
When the lens is positioned at the second location where a clear image is produced on the screen, the distances are;
d₁ = 36 cm
d₂ = 54 - 36 = 18 cm
Plugging these values into the thin lens equation, we get;
1/f = 1/36 + 1/18
1/f = 3/36
1/f = 1/12
f = 12 cm
This confirms that the lens is a converging lens with a focal length of 12 cm.
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What is the medium for the waves in the photograph?
O A. Leaves
O B. Water
O C. Stones
O D. Air
Answers
Calculate the momentum of a 20kg cart traveling to the right with a
velocity of 20m/s. *
Answers
Answer:
momentum= mass x velocity
= 20 x 20 =400kgm/s
What was the focus of the enlightenment? astronomy physics biology government and ethics
Answers
The focus of the enlightenment is (d) government and ethics.
The primary objective of the Enlightenment intellectuals was social reform, and they offered the first significant opposition to the autocracy and theocracy that had long ruled society. Science was one of the most important means of advancing change.
People throughout this time period challenged conventional wisdom and believed that rational reform could enhance humanity.
The philosophers of the Enlightenment believed that Natural Law, rather than antiquated laws recorded in an ancient book, governed mankind. Science also grew beyond its traditional domains of physics, astronomy, natural science, and alchemy/chemistry to include economics, social science, and political science.
Government and ethics were the Enlightenment's primary focuses. They focused on addressing issues with the government, equality, and other societal issues.
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Acid rain is formed when pollutants like sulfur dioxide (SO2) are released into the atmosphere. These pollutants react with gases to produce strong acids. Which of the following is one source of the pollutants?
a. contaminated water
b.vehicles emissions
c.extremely thick fog
d.spraying chemicals inside
Answers
Answer:
b
Explanation:
vehicles emit carbon di oxide and sulfur di oxide which produce acid rain
The stars with medium temperatures appear ______________ in color (check all that apply.)
a. red
b. orange
c. yellow
d. blue
Answers
which statement best describes what happens during this process?
Answers
The opposite charges are pulled away in solution and become free. Option D
What is solvation?We know that when we add an ionic substance into water that the ionic substances would become dissolved in the water. The meaning of this is that the ions that are in the substance would be drawn apart by the molecules of water. The process that makes the ions to be drawn apart by water is what we call solvation.
Now when there is solvation, we would notice that the positive end of the water dipole would surround the negative ion and the negative part of the water dipole would surround the positive ion.
Here we can see that the chloride ion is surrounded as such as so also is the potassium ion. This would lead to the pulling apart of the ions by the water and they become free in solution.
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State your primary mode of transportation and evaluate the energy efficiency of your transportation (in kW-hrs per 100 person-km). All modes of transportation use energy, even walking.
Answers
My primary mode of transportation is a car, and its energy efficiency is typically around 3 kW-hrs per 100 person-km.
As my primary mode of transportation, I rely on a car for commuting and traveling. While cars offer convenience and comfort, they are not the most energy-efficient option. On average, a car consumes approximately 3 kW-hrs of energy per 100 person-km. This energy consumption includes the fuel or electricity required to power the vehicle and accounts for the energy losses during the generation, distribution, and storage processes.
The energy efficiency of a car can vary depending on several factors, including the vehicle's make and model, driving conditions, and driving habits. Factors such as speed, acceleration, and braking can impact fuel consumption and efficiency. Additionally, the type of fuel or power source used by the car influences its energy efficiency. Electric vehicles (EVs) tend to have higher energy efficiency compared to traditional internal combustion engine (ICE) vehicles, as they convert a higher percentage of their energy into forward motion.
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find the magnitude of the electric field due to the slab at |x|>d .
Answers
The electric field due to the slab at |x|>d can be found using Gauss's law. The magnitude of the electric field due to the slab at |x|>d is (σ / ε0) * πL.
The electric field due to the slab at |x|>d can be found using Gauss's law. Since the slab has a uniform charge density, the electric field at a distance r from the center of the slab is given by:
E = (1/ε0) * σ * A / (2 * r),
where σ is the charge density of the slab, A is the area of the Gaussian surface, ε0 is the permittivity of free space, and r is the distance from the center of the slab.
Since the Gaussian surface is a cylinder with radius r and length L, and |x|>d, the cylinder intersects only with the slab, so the electric field through the cylinder is constant and perpendicular to the faces of the cylinder. Thus, the area of the cylinder is A = 2πrL.
Using Gauss's law, the electric field is then:
E = (1/ε0) * σ * A / (2 * r) = (σ / ε0) * πrL / r = (σ / ε0) * πL.
Therefore, the magnitude of the electric field due to the slab at |x|>d is (σ / ε0) * πL.
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NEED HELP WITHIN THE NEXT 10 MIN! WILL MARK BRAINLIEST
For Part 3, describe the motion of the ball as it moves from the top of the ramp and comes to rest against the block. Explain how the motion changes in terms of the velocity, distance, acceleration, and force that you measured. Use your data and Newton’s laws to calculate these values and explain the situation. Include the tables you used to calculate average initial velocity and average displacement. Also show your work for your calculations of acceleration and net force
Answers
The motion of the ball as it moves from the top of the ramp and comes to rest against the block can be described as follows:
Velocity: The initial velocity of the ball as it is released from the top of the ramp can be calculated by using the kinematic equation v_f = v_i + at, where v_f is the final velocity, v_i is the initial velocity, a is the acceleration, and t is the time.
Distance: The distance traveled by the ball as it moves from the top of the ramp to the point where it comes to rest against the block can be calculated using the kinematic equation d = v_i*t + (1/2)at^2.
Acceleration: The acceleration of the ball can be calculated by using the formula a = (v_f - v_i) / t, where v_f is the final velocity, v_i is the initial velocity, and t is the time.
Force: The net force acting on the ball can be calculated using Newton's second law of motion, F = ma, where F is the net force, m is the mass of the ball, and a is the acceleration.
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A volleyball flying through the air what type of energy is it?
Answers
Answer:
Kinetic Energy
Explanation:
PLZ Help Me I give you brainlist also NO LONKS OR I REPORT and Have a gr8 day my peeps
Healthy human lungs look pink and spongy from the outside. The left lung is a little smaller than the right lung to make room for the heart. The lungs and heart are both protected by the rib cage. In the lungs, each main bronchus branches off into many smaller bronchi. The bronchi become smaller and smaller, and the smallest bronchi are called bronchioles. There are about 30,000 bronchioles in each lung, each about the same thickness as a strand of hair. The inhaled air eventually ends up in tiny air sacs called alveoli at the end of each bronchiole. There are about 300 million alveoli in each lung. They are covered with capillaries, tiny blood vessels that are only one cell thick. Oxygen travels from the alveoli through the capillaries to the bloodstream, heart and other cells
Which of these best represents the progression of bronchi, bronchioles and alveoli in the lungs?
A tree trunks that become smaller branches and twigs
B a tight flower bud that has opened into a full bloom
C whole apples that are sliced into separate wedges
D a bridge that crosses two rivers
Answers
Answer:
the answer is a because I saw it in a syllabus
Answer:
just doing this so you can give brainliest to the other person
have a great day!
Explanation:
Is the star moving toward earth, away from earth, or is there not enough information provided to determine its motion?
Answers
If a star is moving towards Earth, shift towards the blue end of the spectrum, this is called blue shift. If the star is moving away from Earth the light from that star will be red and is called red shift .
The faster a star moves towards the earth, the more its light is shifted to higher frequencies. In contrast, if a star is moving away from the earth, its light is shifted to lower frequencies on the color spectrum
if a star is moving towards Earth, it appears to emit light that is shorter in wavelength compared to a source of light that isn't moving. Because shorter wavelengths correspond to a shift towards the blue end of the spectrum, this is called blue shift.
If the star is moving away from Earth, its light will lose energy to reach Earth, therefore the light from that star will be red and is called red shift
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If 80,000 Joules of heat is absorbed by 210 grams of ice at 0°C, what happens to the ice?
It partially melts and stays at 0°C
It completely melts but stays at 0°C
It completely melts and has a final temperature of 11.2°C
It completely melts and has a final temperature of 22.4°C
It completely melts and has a final temperature of 33.6°C
Answers
Answer:
It completely melts and has a final temperature of 22.4°C
Explanation:
(I am very bad at explaining, I am not a teacher, I am a student but I had exact same question on my test so I wanted to help.)
Okay, well to find the Heat required to melt Ice, we have to use the equation:
Q=(m·cΔT)+(m·hf)
Q= HeatM= MassC= Specific heatΔT= Change in temperature. hf= heat fusionSo we can just plug in the values into the equation and see which one adds up too 80,000. (there is probably a better way i just did it this way)
For this situation, we know that:
Mass=210 gramsSpecific heat = 2.10 (I got this number 2.10 from the internet. The universal number for specific heat of ice is 2.10 J/g°C ) Change in temperature= 0 °C or 11.2 °C or 22.4 °C or 33.6 °C (all the answers) Heat fusion=334 (universal number for heat fusion of melting ice is 334)So we can just change the value of change and temperature and see which one equals 80,000.( I will bold the value of change in temperature.)
Q=(m·cΔT)+(m·hf)
(210g)*(2.10)*(0)+(210)*(334)=70140(210g)*(2.10)*(11.2)+(210)*(334)=75079.2(210g)*(2.10)*(22.4)+(210)*(334)=80018.4(210g)*(2.10)*(33.6)+(210)*(334)=84957.6So which one equals 80,000? Equation #3 with the temperature at 22.4 °C
So the answer would be It completely melts and has a final temperature of 22.4°C.
Hope this makes sense, again I am not a teacher I am so bad at explaining, but I did my best. ;)
Un auto recorre una carretera en línea recta de 10km y tarda 8 minutos ¿Cual es su velocidad en km/h?
Answers
20,83 m / s (metros por segundo)
divide 10 metros entre 8 minutos y obtén 20.83333333
20.83 m/s (meters per second)
divide 10 meters by 8 minutes and get 20.83333333
a 4.50-kg object moves through a distance of 13.8 m as it slows down uniformly from 22.0 m/s to 13.5 m/s. what is the magnitude of the acceleration of the ball?
Answers
The magnitude of the acceleration of the ball is 25.3 m/s²
Acceleration is the rate of change of the velocity of an item with appreciation to time. Accelerations are vector portions. The orientation of an item's acceleration is given by the orientation of the net pressure appearing on that object.
Acceleration is the charge at which velocity modifications with time, in terms of each speed and route. A factor or an object moving in a straight line is accelerated if it quickens or slows down. movement on a circle is extended despite the fact that the rate is consistent because the course is continually changing.
Calculation:-
v² = u² -2as
13.5² = 22² - 2a × 13.8
1182.25 - 484 = - 27.6a
698.25/27.6 = -a
a = - 25.3 m/s²
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As distance increases, gravitational force________
Answers
Answer:
Decreases
Explanation:
Answer:
Decreases
ExplanatIon:
In a race, a car travels 60 times around a 3.6km track. This takes 2.4 hours. What is the average speed of the car?
Answers
Answer:
multiply
Explanation:
multiply
Answer:
90km/h
Explanation:
a mountain or hill that remains when adjacent areas have eroded to lower levels is a(n):
Answers
A mountain or hill that remains when adjacent areas have eroded to lower levels is a residual hill or monadnock.Buttes were created through the process of erosion, the gradual wearing away of earth by water, wind, and ice. Buttes were once part of flat, elevated areas of land known as mesas or plateaus. In fact, the only difference between a mesa and a butte is its size.
Mesas are formed by erosion, when water washes smaller and softer types of rocks away from the top of a hill. The strong, durable rock that remains on top of a mesa is called caprock. A mesa is usually wider than it is tall. Mesas are usually found in dry regions where rock layers are horizontal. Fast Fact
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Bullets spin when shot from a rifle or handgun. What causes this spinning?
Answers
Answer:
The spark from the primer ignites the gunpowder. Gas converted from the burning powder rapidly expands in the cartridge. The expanding gas forces the bullet out of the cartridge and down the barrel with great speed. The rifling in the barrel causes the bullet to spin as it travels out of the barrel.
Explanation:
If you drop a ball off a cliff, it starts out at 0 m/s. after 1 s, it will be traveling at about 10 m/s. if air resistance is removed, what will happen in 2 s?
Answers
The ball dropped of a cliff will have a final velocity of 19.6 m/s at 2s
The free fall formula and the procedure we will use is:
fv = g* t
Where:
fv = final velocityg = acceleration due to gravityt = time takenh = height traveledInformation of the problem:
g = 9.8 m/s².t = 2 svf = ?Applying final velocity formula we get:
fv = g* t
fv = 9.8 m/s² * 2 s
fv = 19.6 m/s
What is free fall?It is when the object or mobile falls from a height (h) with a positive acceleration equal to the gravity, describing a vertical rectilinear travel.
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