16. when the pressure at the hose valve outlet exceeds a predetermined pressure, how are fire fighters in most jurisdictions alerted of the high pressure?
Answers
Warning signs are fire fighters in most jurisdictions alerted of the high pressure.
How is a fire suppression system designed to operate?By taking away heat or oxygen or by interfering with chemical reactions, suppression agents put out fires. When the system is turned on, the agent moves from the cylinder to the safe area either directly through the detection tube or via hoses and nozzles that are connected to it.
The Most Popular Styles of Fire Suppression Equipment
Systems for putting out fires that use water. Chemical Foam Suppression Systems, Pneumatic Heat Detection Tubes, Pressurized Gas Systems, Foam Deluge Systems, and Water Extinguishing Systems are some of the most popular fire protection systems.
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Related Questions
help meeeeeeeeeeee
what is the rheostat and what its ruleeee??
Answers
Answer:
Rheostat, adjustable resistor used in applications that require the adjustment of current or the varying of resistance in an electric circuit. The rheostat can adjust generator characteristics, dim lights, and start or control the speed of motors.
Explanation:
niobium metal becomes a superconductor when cooled below 9 k. its superconductivity is destroyed when the surface magnetic field exceeds 0.100 t. in the absence of any external magnetic field, determine the maximum current a 3.96-mm-diameter niobium wire can carry and remain superconducting.
Answers
The highest current that a 3.96 mm diameter niobium wire can carry while still remaining superconducting in the absence of any external magnetic fields is Ic=994.7 A
Niobium metal's critical magnetic field below the transition temperature
Bc=0.1T
Diameter of the Niobium wire d = 3.96×10⁻³m
Radius of the wire R = 1.98×10⁻³m
Permiability of free space = μ₀ = 4π×10⁻⁷H/m
Critical magnetic field and current is related by the equation Bc=μ₀Ic/2πR
Ic=Bc2πR/μ₀
Ic=0.1*2*3.14*1.98*10⁻³/4*3.14*10⁻⁷
=0.09947*10⁴
Ic=994.7 A
If the magnetic field is greater than the critical magnetic field below the super conducting transition temperature, a super conductor will transition into a normal conductor. The magnitude of the magnetic field created on the conductor's surface by a current I flowing through a conductor with radius R is determined by the Amperes law.
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Estimate the magnitude of the magnetic field at ground level generated by an overhead AC power line service drop connecting a single home to a utility pole.
Answers
Answer:
Explanation:
Magnetic field due to current carrying wire at a distance r from the wire is
\(B=\frac{\mu_0I}{2r}---(1)\)
In our case
\(I=\frac{I_0}{2}\)
where,
I₀ = max current or peak current
and r = h (where h is the height of power line)
\(\therefore B=\frac{\mu (I_0/2)}{2h} \\\\=\frac{\mu_0 I_0}{4h} ----(2)\)
put
h ≈ 370m
I₀ ≈ 3KA
\(B= \frac{(1.26*10^-^6)(3*10^3)}{4*(370)} \\\\=2.5*10^-^6 T\)
How does the Coriolis effect impact the Gulf Stream and the Brazil Current?
Answers
Answer: The Coriolis effect results in bending the direction of surface currents to the right in the Northern Hemisphere and left in the Southern Hemisphere. The Coriolis effect causes winds and currents to form the circular patterns. The direction in which they spin depends upon the hemisphere in which they are present.Coriolis Effect is named after the French mathematician and physicist Gaspard-Gustave de Coriolis. It affects the weather patterns of an area, it affects the ocean currents, and it also affects air quality.
18. The diagram below shows three flasks with three different liquids in each of them. hot water initial level of the liquid Liquid A Liquid B Liquid C The volume and temperature of the liquids in the flask are the same. All three flasks were placed inside a hot water trough. The level of the liquids increases. (a) (b) Why does the level of the liquids rises up? The liquids gain heat from the hot water, expand and move upwards Different liquids rises to a different level after heating. Explain the reason. Different liquids expand by different amounts when beated by the same temperature (c) Give one application of this expansion.
Answers
Different liquids have different rates of expansion. I think we can fairly say that (most) substances expand when heating because they vibrate more, because they have more kinetic energy, so there's a pushing force between molecules. For almost the same reason, gasses expand.The change in volume us independent of the original mass but depends on original volume.
A mercury thermometer is based on the application of thermal expansion of liquids. The bulb of the thermometer is kept in contact with a hot body, and mercury expands and level of mercury rises in the tube
◌⑅⃝●♡⋆♡MICKZMINNZ♡⋆♡●⑅◌
Just have fun
Have you ever listen to this?? its sooo good
Answers
Answer:
no i haven't. i will
Explanation:
Which of the following potential problems with question wording have been identified by cognitive psychologists? (Check all that apply.) a) unfamiliar technical terms
b) vague or imprecise terms
c) ungrammatical sentence structure
d) phrasing that overloads working memory
e) embedding the question with misleading information
Answers
Option d) phrasing that overloads working memory, potential problems with question-wording have been identified by cognitive psychologists.
Cognitive psychology is the look at mental procedures, along with memory, attention, belief, and language processing, and the way they affect human behavior. Cognitive psychologists expand strategies to assist folks that are experiencing difficulties with one or more of those processes.
Cognitive psychologists normally earn either a Ph. D as a doctor of Philosophy or a Psy. D as a medical doctor of Psychology in cognitive psychology. Similar to psychology coursework, they need education in studies techniques, statistics, neuroscience, and cognitive mastering.
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1.-Sean los siguientes vectores A=3i + 2j - 7 k B=3J + 6 K + 5 i Hallar a) |A| b) A+B c) |A+B| d) A-B e) 2A+3B
Answers
Answer:
A = 2,
Explanation:
(3 + 2) - 7
2 - A: 2
3 + 6 + 5
14 - B: 14
YOUR WELCOME
9. A bicyclist is moving down a hill. Her position on the hill gives her 720 J of potential energy, and her
movement gives her 680 J of kinetic energy. What is her total mechanical energy?
A. 260 J
B. 1400 J
C. 2648 J
D. 2.86×105 J
Answers
The total mechanical energy of the bicyclist is 1400 J, obtained by adding her potential energy of 720 J and kinetic energy of 680 J. The correct answer is option B.
The total mechanical energy of a moving object is the sum of its kinetic energy and potential energy. Kinetic energy is defined as the energy an object has due to its motion, whereas potential energy is the energy an object has due to its position or configuration.Therefore, the total mechanical energy of the bicyclist is calculated by adding her kinetic energy and potential energy. According to the question, the bicyclist has 720 J of potential energy and 680 J of kinetic energy.Total mechanical energy = Potential energy + Kinetic energy = 720 J + 680 J = 1400 JTherefore, the total mechanical energy of the bicyclist is 1400 J. Therefore, the correct answer is option B.For more questions on mechanical energy
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Tool
Scientists are searching for planets that orbit stars outside Earth's solar system by collecting data from different technology tools. A student lists a few tools and their cases that would provide clients
with information about these planets in a table, as shown
Use
spectroscope
gathers information about the
planets in any weather conditions
space probe
collects data from the planets that
would otherwise not be available
identifies different elements present
reflector telescope
around the planets
radio telescope produces images of the planets
Which tool is paired correctly with its intended use?
space probe
Opectroscope
radio telescope
reflector telescope
Answers
Answer:
9758 how many significant figures
The extent of vibration is called__
It determines the __ of the sound produced.
Answers
Answer:
The extent of vibration is called amplitude. It determines the energy? of the sound produced.
Explanation:
What is one benefit of a cardio kickboxing workout?
A. It is a total body exercise.
B. It focuses specifically on aerobics.
C. It focuses specifically on anaerobics.
D. It focuses on the core muscles.
Answers
Answer:
D. It focuses on the core muscles
Answer:
A. It is a total body exercise
Explanation:
In cardio kickboxing as described by my school is "
a total body exercise that combines aerobic and anaerobic workoutsan improvement in body fat compositionan efficient use of workout timea boost in confidence and self-esteemrelief of stress and increased energy levelsvaluable self-defense skillsThe first benefit is the one which we are focusing on because all the other answers are correct but A. Total body exercise is the best answer because it covers all of them as an compendious answer
Also I took the test and got this correct
what is volume help plz
Answers
Answer:
Explanation:
Volume = Length x width x height
Multiply the length, width and, height to get the volume of the question.
(E) V = kQ/r so the smaller sphere is at the lower potential (more negative = lower) Negative charge
flows from low to high potential so the charge will flow from the smaller sphere to the larger.
The flow of charge ceases when there is no difference in potential.
Two conducting spheres of different radii, as shown above, each have charge -Q. Which of the following
occurs when the two spheres are connected with a conducting wire?
(A) No charge flows.
(B) Negative charge flows from the larger sphere to the smaller sphere until the electric field at the surface of
each sphere is the same.
(C) Negative charge flows from the larger sphere to the smaller sphere until the electric potential of each
sphere is the same.
(D) Negative charge flows from the smaller sphere to the larger sphere until the electric field at the surface of
each sphere is the same.
(E) Negative charge flows from the smaller sphere to the larger sphere until the electric potential of each
sphere is the same.
Answers
The correct statement is " Negative charge flows from the smaller sphere to the larger sphere until the electric potential of each sphere is the same." The correct Option (E).
When the two spheres are connected with a conducting wire, the negative charge will flow from the smaller sphere to the larger sphere until the electric potential of each sphere is the same. This is because the electric potential at a point in space is proportional to the amount of charge present at that point and inversely proportional to the distance from the point to the center of the charged sphere.
Option (A) is not true because charge will flow due to the difference in potential between the two spheres.
Option (B) is not true because the electric field at the surface of each sphere will not necessarily be the same after charge flows.
Option (C) is not true because the electric potential at a point in space is the same for all charged conductors connected by a wire.
Option (D) is not true because the negative charge will flow from the smaller sphere to the larger sphere, not the other way around.
Therefore, The correct answer is option E.
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Two conducting spheres of different radii with each negative charge connected with a conducting wire, Negative charges flow from the smaller sphere to the larger sphere until the potential becomes the same. Thus, option E is correct.
The potential V = kQ / r, Potential and charge are directly proportional to each other, more potential gives more negative charge. More negative charge gives lower potential. The potential always flows from a lower to a higher potential. Thus the negative charge flows from the smaller sphere to the larger sphere to equal the potential.
Thus, the correct option is E.
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when a scientist is conducting research about all the plants and wildlife in the Mojave desert as well as the deserts resource such as water and soil the scientist is studying
Answers
Answer:
The correct answer to the following question will be "An ecosystem".
Explanation:
The environment seems to be all the species of animals and plants that people living in a defined place, including the complex nature of relationships between them because of environmental surroundings.Sometimes whenever a scientist seems to be doing work on both animals and plants throughout the desert, including on wilderness freshwater resources as well as soil.So that the above seems to be the right answer.
.) Explain what an indepent variable is
Explain what an
dependent variable
Answers
Answer:
An independent variable is a variable that stands alone and isn't changed by the other variables you are trying to measure.
A dependent variable is something that depends on other factors.
PLEASE help! I am so desperate LOL
1: A 75.0 kg astronaut is training for accelerations that he will experience upon reentry. He is placed in a centrifuge (r = 20.0 m) and spun at a constant angular velocity of 15.0 rpm (revolutions per minute). He is then slowed and brought to a stop in 2.0 minutes.
(1a) Find the magnitude and direction of the centripetal acceleration and force when he is spinning at constant angular velocity.
(2a) How many g’s is the astronaut experiencing when moving at constant angular velocity?
(3a) Find the torque that is needed to bring the centrifuge to a stop knowing the centrifuge has a mass of 5500.0 kg (ignore all other forces) and the force is applied at the edge of the centrifuge (20.0 m radius). Hint: torque is based on the change of linear velocity.
2: An astronaut lands on an alien planet. He places a pendulum (L = 0.200 m) on the surface and sets it in simple harmonic motion, as shown in this graph.
(2a) What is the period and frequency of the pendulum’s motion?
(2b) How many seconds out of phase with the displacements shown would graphs of the velocity and acceleration be?
(2c) What is the acceleration due to gravity on the surface of the planet in m/s2? Determine the number of g-forces.
Answers
Answer: (1a) The magnitude of the centripetal acceleration is 31.4 m/s^2, and the direction is towards the center of the circular motion.
(2a) The astronaut is experiencing 31.4 m/s^2 / 9.8 m/s^2 = 3.22 g's.
(3a) The torque needed to bring the centrifuge to a stop is (5500.0 kg * 31.4 m/s^2 * 20.0 m) = 3,420,000 N * m.
2:
(2a) The period of the pendulum's motion is 0.20 m / 0.10 m/s = 2.0 seconds, and the frequency is 1 / 2.0 s = 0.50 Hz.
(2b) The graphs of velocity and acceleration would be 0.5 seconds out of phase with the displacements shown.
(2c) The acceleration due to gravity on the surface of the planet is 0.10 m/s^2 / 9.8 m/s^2 = 1.02 g's.
Explanation:
A loop of wire carries a current. The resulting magnetic field __________.
points toward the loop at all points
points away from the loop at all points
is similar to that of a bar magnet in the plane of the loop
is similar to that of a bar magnet perpendicular to the plane of the loop
Answers
When a current passes thrοugh a wire lοοp, the magnetic field it creates resembles that οf a bar magnet οriented perpendicular tο the plane οf the lοοp. The magnetic field lines fοrm clοsed lοοps, similar tο the pattern οf a bar magnet.
Determine hοw the bar magnet perpendicular tο the plane οf the lοοp?When a current flοws thrοugh a lοοp οf wire, it creates a magnetic field arοund the wire accοrding tο Ampere's law. The magnetic field lines fοrm cοncentric circles arοund the wire. The directiοn οf the magnetic field can be determined using the right-hand rule. If yοu curl the fingers οf yοur right hand in the directiοn οf the current, yοur thumb will pοint in the directiοn οf the magnetic field inside the lοοp.
Since the current in the lοοp fοrms a clοsed path, the magnetic field lines inside the lοοp will fοrm clοsed lοοps as well. The shape οf these lοοps resembles that οf a bar magnet, with the magnetic field lines emerging frοm οne face and re-entering thrοugh the οppοsite face.
Thus, the resulting magnetic field is similar tο that οf a bar magnet perpendicular tο the plane οf the lοοp, where the lοοp acts as the equivalent οf the bar magnet.
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When the handle of a jackscrew is rotated through one turn, the load weight is lifted by a height equal to the pitch d of the screw. What is the ima of the jackscrew with a handle length r and a pitch d?
Answers
The IMA of the jackscrew with a handle length r and a pitch d is 2πr/d.
In this case, the input force is applied to the handle of the jackscrew and the output force is the weight lifted by the screw.
When the handle is rotated through one turn, it moves in a circle of radius r, which corresponds to the distance moved by the input force. The distance moved by the output force is equal to the pitch d of the screw, since the weight is lifted by that height.
Therefore, the IMA of the jackscrew is:
IMA = distance moved by input force / distance moved by output force
= 2πr / d
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Stars which never disappear below the horizon are called__stars. A. Polaris B. visible C. constellation D. circumpolar
Answers
Answer:
D. circumpolar
Explanation:
A circumpolar star is a star, as viewed from a given latitude on Earth, that never sets below the horizon due to its apparent proximity to one of the celestial poles.
-Wikipedia
the procedure instructs you to measure radius to the outside of the electron beam path. how does this lessen the impact of the lost electron velocity (described in question 2)?
Answers
Measuring the radius to the outside of the electron beam path takes into account the fact that the electron has lost some of its velocity due to scattering.
What is the velocity?When an electron undergoes scattering, it loses energy and changes its direction. This means that the electron will not follow a straight path, but instead will deviate from its original path. By measuring the radius to the outside of the electron beam path, one is essentially measuring the maximum extent of the scattered electrons, which takes into account the lost electron velocity.
Therefore, This approach ensures that the measured radius is accurate, despite the fact that the electron may have lost some of its velocity due to scattering.
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Ventajas y desventajas de la energía eléctrica??
Answers
Answer:
Advantages and Disadvantages of Electric PowerAdvantages:Electric power has many advantages domestically and industrially, as most of the equipment run by electric power. Brightness in the night is only possible by the use of electricity. Almost all the factories and industries are running due to electric power. The advantage of electric power is its reliable and uninterrupted supply runs the equipment efficiently and continuously. The transportation of electricity is easy once the transmission lines are functional. They work for years and need no or very less maintenance. The invention of electric power is one of the best inventions which have changed human life drastically. It allows people to do more leisure activities.
Disadvantages:In the conventional system to generate electric power, coal is burnt to generate heat which boils the water to produce steam. The steam produced is used to run the turbines which in turn generate the electricity. This is a very old method to generate electricity which produces too much air pollution as a by-product. Due to the burning of coal, carbon monoxide, carbon dioxide, different oxides of sulphur and nitrogen are pumped into the atmosphere which pollutes it badly. As carbon dioxide is the greenhouse gas and its excessive presence in the atmosphere raises the earth’s temperature.
Distribution of electric power is in two types of current, AC and DC. Alternating current is 3 to 4 times more dangerous as compared to direct current. It causes more muscle contraction as it reduces skin resistance by stimulating sweating
Answer:
Explanation:
Electricity can be used to heat either storage or continuous flow water heaters, and can also be used as a booster to solar or heat pump water heating systems.
The advantage of electricity is its reliable supply. However, in terms of sustainability and energy efficiency, conventional electric hot water heating is not a preferred option except as a booster system.
Conventional electric systems are less energy efficient than solar and heat pump systems, and generating electricity from fossil fuels produces greenhouse gas emissions. As well as these environmental costs, rising electricity prices also provide an incentive to seek more efficient energy sources.
Which type of resources do we have a limited supply of?
Answers
Explanation:
The resources that we value—time, money, labor, tools, land, and raw materials—exist in limited supply. There are simply never enough resources to meet all our needs and desires.
Explanation:
Time, money, labor, land , and raw materials
There is a bell at the top of a tower that is 40m high. The bell weighs 12kg. The bell has ___________________ energy. Calculate it.
Answers
Answer:
Potential
Explanation:
hope this helps
what is the prefix of 10^10
PLEASE BE FAST :)
Answers
10*10= 100
after the dark wand touched the basket, what was the polarity of the basket? did the basket gain or lose electrons during the contact with the dark wand? where did the electrons go (or come from)?
Answers
After the dark wand touched the basket, The basket took on a negative charge, the charge was decreased. The dark wand stole electrons from the pail since it had a negative charge.
Charge is a fundamental property of matter that describes the electrical interaction between objects. It is a scalar quantity with units of Coulombs (C) in the SI system. There are two types of charges: positive and negative.
Positive charges have more protons than electrons and are attracted to negative charges. Negative charges have more electrons than protons and are attracted to positive charges. Objects with the same charge will repel each other.
Charge is conserved, meaning that the total charge in a system remains constant, even though the charge distribution can change. This is known as the law of conservation of charge.
Therefore, After the dark wand touched the basket, The basket took on a negative charge, and the charge was decreased. The dark wand stole electrons from the pail since it had a negative charge.
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Pleaseeeee help me with b, c, and d. There are no angles.
Answers
Answer:
a. 150 J
b. 150 J
c. 0 J
d. 0 J
Explanation:
The given parameters are;
The horizontal force with which the man pulls the canister, F = 50 N
The distance he moves the vacuum cleaner, d = 3.0 m
a. Work done, W = Force applied, F × Distance moved by the force, d
Therefore, for the work done by the 50 N force on the canister, we have;
W = 50 N × 3.0 m = 150 N·m = 150 J
b. Given that he pulls the canister at a constant speed, we have;
The acceleration of the canister, a = 0 m/s²
Therefore, the net force on the canister, \(F_{NET}\) = F - \(F_{Friction}\) = m × a
Where;
m = The mass of the canister
a = The acceleration of the canister
F = The applied force = 50 N
\(F_{Friction}\) = The force of friction
∴ \(F_{NET}\) = m × a = m × 0 m/s² = 0 N
Therefore;
\(F_{NET}\) = F - \(F_{Friction}\) = 0 N
From which we have;
F = \(F_{Friction}\) = 50 N (The applied force, F is equal to the force of friction,
The work done by friction = The force of friction × The distance in which the force of friction acts
∴ The work done by friction = \(F_{Friction}\) × d - 50 N × 3.0 m = 150 J
The work done by friction = 150 J
c. The normal force, N acts perpendicular to the force of friction
The distance the canister moves in the perpendicular direction, \(d_p\) = 0 m
∴ The work done by the normal direction = N × \(d_p\) = N × 0 m = 0 J
The work done by the normal direction = 0 J
d. The vacuum weight, W, acts on the same line as the normal force but in the opposite direction to the normal force, N
Therefore, the weight, W, acts perpendicular to the line of motion of canister
The distance the canister moves in the direction of the weight, \(d_{wieght}\) = 0 m
Therefore, the work done by the weight = W × \(d_{wieght}\) = W × 0 m = 0 J
The work done by the weight = 0 J
A new ski area has opened that emphasizes the extreme nature of the skiing possible on its slopes. Suppose an ad intones "Free-fall skydiving is the greatest rush you can experience . . . but we’ll take you as close as you can get on land. When you tip your skis down the slope of our steepest runs, you can accelerate at up to 75% of the acceleration you’d experience in free fall." What angle slope could give such an acceleration?
Answers
Answer:
48.6°
Explanation:
The forward force, F equals the component of the weight along the slope.
So mgsinθ = ma where a = acceleration and θ = angle between the slope and the horizontal.
So a = gsinθ
Since we are given that a = 75%g = 0.75g,
0.75g = gsinθ
sinθ = 0.75
θ = sin⁻¹(0.75)
= 48.6°
A 3,000 kg truck moving at +10 m/s hits a 1,000 kg parked car which moves off at +15 m/s. What is the velocity of the truck?.
Answers
The velocity of the truck is 5m/s.
Given:
m1 = 3000 (mass of truck)
m2 = 1000 (mass of car)
u1 = 10m/s( initial velocity of truck)
u2=0 (initial velocity of the car)
v1 = ? (final velocity of the truck )
v2 = =15m/s (final velocity of the car)
The momentum of the system initially,
pi=m1u1+m2u2
\(pi = 3000 * 10 + 1000 * 0\\pi = 30000 + 0\\pi=30000\)
We know that pi = pf
m1u1+m2u2=m1v1+m2v2
\(30000=3000v1+15000\)
\(3000v1=30000-150003000v1=15000v1=15000/3000v1=5m/s\)
What is conservation of momentum?
The conservation of momentum states that, within some problem domain, the amount of momentum remains constant; momentum is neither created nor destroyed, but only changed through the action of forces as described by Newton's laws of motion.
What is the formula law of conservation of momentum?
As a result, the equation of the law of conservation of momentum is as follows: m 1 u 1 +m 2 u 2 represents the total momentum of particles A and B before the collision, and m 1 v 1 +m 2 v 2 represents the total momentum of particles A and B after the collision.
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The electric field 0.385 m from a very long uniform line of charge is 810 N/C
How much charge is contained in a section of the line of length 2.50 cm?
Answers
The charge contained in a section of the line of length 2.50 cm is 8.87 × 10⁻¹⁰ C.
The formula for electric field intensity of a line charge is given by:E= λ/2πε₀rwhere,λ is the linear charge density of the line.ε₀ is the permittivity of free space.r is the perpendicular distance of the point from the line charge.
Electric field intensity, E = 810 N/CandDistance, r = 0.385 mUsing the above formula, we can find the value of linear charge density of the line.λ = 2πε₀Erλ = 2 × π × 8.85 × 10⁻¹² × 810 × 0.385λ = 3.55 × 10⁻⁸ C/mLength of the section of the line, L = 2.5 cm = 0.025 mWe need to find the charge present in a section of the line of length 2.50 cm.Since the linear charge density of the line is 3.55 × 10⁻⁸ C/m,Charge in a section of the line of length 0.025 m = λLq = λLq = 3.55 × 10⁻⁸ × 0.025q = 8.87 × 10⁻¹⁰ C
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