Answer:
5 N
Explanation:
Archimedes' principle indicates that the upward buoyant force that is exerted on a body immersed in a fluid, whether fully or partially submerged, is equal to the weight of the fluid that the body displaces.
In this case, The weight of an object in air is 20N and it weighs x N when fully immersed in water. So, the weight of the water displaced is given as;
20 − x = 5
Therefore, the weight of the body in water is 5 N.
if a fishing pole is 1.5m long, how long is the fishing pole in km?
The fishing pole is 0.0015km
A particle moving at speed 0. 24 cc has momentum p0p0. the speed of the particle is increased to 0. 68 cc. part a what is its momentum now?
A particle moving at speed 0.24 c has momentum P₀. The speed of the particle is increased to 0.68 c then its momentum would be 2.85P₀.
Momentum is the result of a particle's mass and velocity. Being a vector quantity, momentum possesses both magnitude and direction.
Mathematically the formula of the momentum is
P = mv
where P is the momentum of the particle
m is the mass of the particle
v is the velocity by which the particle is moving
As mentioned in the question when the particle is moving with 0.24c velocity it has a momentum of P₀
P₀ = m*(0.24c)
If the speed of the particle is increased to 0.68 c the momentum would be
P=m*(0.68c)
by dividing the second equation from the first one
P₀/P = 0.24c/0.68c
P₀/P = 0.35
P =2.85P₀
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What is the energy density at the center of a circular loop of wire carrying a 23.0 a current if the radius of the loop is 28.0 cm?
The energy density at the center of a circular loop of wire carrying a 23.0 a current if the radius of the loop is 28.0 cm will be 1.06 * [tex]10^{-3}[/tex] J / [tex]m^{3}[/tex]
Energy density is defined as the amount of energy accumulated in a system per unit volume. In the case of electrical energy. Electrical energy density = permittivity* Electric field squared/2 mu0
When an electric current is passed through a current-carrying circular wire loop, the magnetic field lines are generated in a circular pattern around the arms of the coil while the magnetic field lines are straight at the center of the loop
The magnetic field strength at the center of a circular loop is given by
B=(muo*I)/2R (at center of loop),
Energy density = [tex]B^{2}[/tex] / 2 (mu0)
= [tex]\frac{1}{2 (muo)}[/tex] * [tex](\frac{muo * I}{2R})^{2}[/tex] = [tex]\frac{muo * I^{2} }{8 * R^{2} }[/tex]
= [tex]\frac{4*3.14*10^{-7}*(23)^{2} }{8 * (0.28)^{2} }[/tex]
= 1.06 * [tex]10^{-3}[/tex] J / [tex]m^{3}[/tex]
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What is the de broglie wavelength of this electron? [ke[ke = 12mv2;12mv2; 1 electron volt (ev)(ev) = 1. 602×10−19j]
broglie wavelength of this electron is 107.5pm.
what is de broglie wavelength?
The wavelength (λ) that is associated with an object in relation to its momentum and mass is known as de Broglie wavelength.
Given:
de broglie wavelength of this electron? [ke[ke = 12mv2;12mv2; 1 electron volt (ev)(ev) = 1. 602×10−19j] is 107.5pm
[tex]h = 6.63 \times 10 { }^{ - 34} [/tex]
[tex]k = 120ev[/tex]
[tex]me = 9 \times 10 {}^{ - 31} kg[/tex]
[tex]1ev = 1.6 \times 10 {}^{ - 19} [/tex]
[tex]p = \sqrt{2mk} [/tex]
[tex] = \sqrt{2 \times 9 \times 10 { }^{ - 31} \times 1.6 \times 10 {}^{ - 19} } [/tex]
[tex] = 5.88 \times 10 {}^{ - 24} kgm/s[/tex]
de broglie wavelength
λ=h/p
[tex] = \frac{6.63 \times 10 {}^{ - 34} }{5.88 \times 10 {}^{ - 24} } [/tex]
Thus from the above calculation the de broglie wavelength comes out to be 107.5pm
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__ modified the concept by adding an internal combustion engine and marketing hybrids that were part electric and part gas powered
Hybrid
Hybrid modified the concept by adding an internal combustion engine and marketing hybrids that were part electric and part gas powered.
The driving wheels of hybrid vehicles receive power from their drivetrains. A hybrid car has numerous sources of propulsion.There are numerous hybrid configurations. A hybrid vehicle might, for instance, get its energy from burning gasoline while alternating between an electric motor and a combustion engine.Although they have primarily been employed for rail locomotives, electrical vehicles have a long history of integrating internal combustion and electrical transmission, like in a diesel-electric power-train. Because the electric drive transmission directly substitutes the mechanical gearbox rather than serving as an additional source of motive power, a diesel-electric powertrain does not meet the definition of a hybrid.Only the electric/ICE hybrid car type was readily accessible on the market as of 2017. One type used parallel operation to power both motors at the same time. Another ran in series, using one source to supply power solely and the other to supply electricity. Either source may act as the main driving force, with the other source serving to strengthen the main.To learn more about hybrid vehicles visit:
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Factors that affect mechanical advantage of a machine
Hi there! Your answer is below.
Pulley sizes, cylinder size ratios, screw pitch, leverage, gear ratios, and pulley sizes
The MA increases yet the work takes longer to complete the farther the applied effort goes relative to the load. An excessive increase in the MA may be counterproductive.
Bicycle derailleurs are the most obvious example of variable MA.
Choose a low gear to climb hills more easily, but if you don't switch to another one on the flat, you'll be pedaling frantically and quickly getting nowhere. (Of course, you progress, but slowly.)
I frequently use bicycles as illustrations of intricate mechanics. They aren't actually toys at all!
Thank you,
Eddie
Safety belts and occupant protection systems are installed to reduce the harmful effects of the force of _____ during a collision.
To lessen the negative impacts of the force generated during a collision, safety belts and occupant protective relays are installed.
Importance of safety belts:
The purpose of a seat belt usually referred to as a safety belt or a safety belt, is to protect the driver or an occupant of a vehicle from a potentially dangerous movement that may occur during an accident or an abrupt stop. By minimizing the power of secondary hits with interior striking hazards, maintaining proper occupant positioning for the airbag, and preventing people from being expelled from the vehicle after an accident or if the automobile rolls over, seat belts help minimize the chance of a fatal accident in traffic collisions. When the car is moving, the passenger and the driver move together with it at the same pace.The occupants continue moving at the same pace the vehicle was traveling at when it stopped if it unexpectedly stops or crashes. To stop the driver and other passengers from exiting the vehicle or contacting the interiors of the vehicle, seatbelts apply an equal and opposite force to them. Due to their crucial function in occupant safety, seatbelts are regarded as the main restraint devices.Learn more about safety belts here:
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Picking up sound waves is the stage of listening that most people refer to as what?
A. hearing
B. perceiving
C. understanding
D. evaluating
A. Picking up sound waves is the stage of listening that most people refer to as hearing.
What is hearing?
Hearing, or auditory perception, is the ability to perceive sounds through an organ, such as an ear, by detecting vibrations as periodic changes in the pressure of a surrounding medium.
During learning process, when someone picks up the sound waves directed to him/her, it is known as the act of hearing,
Thus, picking up sound waves is the stage of listening that most people refer to as hearing.
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A ________ is a collection of related data, equivalent to an electronic file cabinet.
Answer:
database
Explanation:
A database is a collection of related data, equivalent to an electronic file cabinet. The correct option is B.
What is a database?A database is a structured collection of data that is stored and accessed electronically in computing. Small databases can be kept on a file system, whereas large databases are kept on computer clusters or in the cloud.
A database is a well-organized gathering of information or data that is customarily entered into the system in a computer system. A database management system is usually in charge of such a database (DBMS).
A database system retail locations critical business data: the data, when analyzed, becomes valuable information about a company and aids in decision-making.
Database structure is the components of a database. This is actually a new way between entities.
Thus, the correct option is B.
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A)gallery
B)database
C)spreadsheet
D)presentation
Importance of knowledge of gravitational acceleration of planets in space exploration and continuity of life
Gravity has an effect on the ease of landing on moons and planets. And on leaving! Actually Earth is about as heavy a planet as one could want. It takes a lot of fuel to leave Earth and a huge amount of energy to ship anything from Earth. Hence the attraction of using the moon or Mars as a base for exploration. But if you have to ship everything to the moon and then transship to other destinations it’s a losing proposition. The only thing that would make it work would be the ability to find lots of water and oxygen on the moon.
Rx: hydrochloric acid 2 percent solution 500 ml. your stock solution of hydrochloric acid is 10 percent. how much of the stock solution is required to prepare the order?
100 ml
100 ml of the stock solution is required to prepare the order.
We know that C1V1 = C2V2
where C1= 2%
V1 = 500ml
C2= 10%
V2 = ?
V2 = C1V1 / C2
= 500 * 2% / 10%
=100
V2 = 100 ml
What is meant by stock solution?A stock solution is a sizable amount of a typical reagent in a standardized concentration, like sodium hydroxide or hydrochloric acid. This phrase is frequently used in analytical chemistry while doing operations like titrations where it's crucial to employ precise solution concentrations.What distinguishes a standard solution from a stock solution?The main distinction between stock solution and standard solution is that the former is a highly concentrated solution while the later is a solution whose concentration is precisely known. Because standard solutions frequently arrive as stock solutions, the phrases "stock solution" and "standard solution" are connected.To learn more about stock solution preparation visit:
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At what temperature must a hot reservoir operate in order to achieve a 30arnot efficiency when the cold reservoir operates at 200 °c?
At temperature 402.71° C must a hot reservoir operate in order to achieve a 30% Carnot efficiency when the cold reservoir operates at 200 °C.
The Carnot engine is a theoretical thermodynamic cycle proposed by Leonard Carnot. It estimates the maximum possible efficiency that a heat engine during the conversion process of heat into work and, conversely, working between two reservoirs can possess.
The Carnot efficiency depends only on the temperature of the hot source and the cold sink. Carnot efficiency describes the maximum thermal efficiency that a heat engine can achieve as permitted by the Second Law of Thermodynamics.
Given
Efficiency = 30 %
T2 = absolute temperature of the heat source = T2
T1 = absolute temperature of the heat sink = 200 °C
efficiency = T2 - T1 / T2
30 /100= T2 - 200 / T2
T2 = 675.71° K
T2 = 402.71° C
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The schematic diagram below shows an induction cooktop being used to heat water in a steel pan.
Which of the following best explains how the water is heated?
A
The ceramic top plate heats up as the magnetic field transfers heat energy directly to the top plate. The pan and water are then heated by conduction.
B
The current from the coil is transferred by means of the magnetic field to the pan. The pan then induces a current in the water, which heats due to resistance.
C
The copper coil heats up as it resists the electric current. This heat is then transferred by convection through the ceramic cooktop and pan to the water.
D
The steel pan heats up as it resists the induced movement of electrons caused by the changing magnetic field. The water is heated by conduction.
The water is heated as the current from the coil is transferred by means of the magnetic field to the pan. The pan then induces a current in the water, which heats due to resistance. That is option B.
What is cooking by induction?Induction cooking is referred to the transfer of heat energy from one source to another through a magnetic field that helps in the movement of electrons.
Heat cannot be transferred to the water without changes of the magnetic field.
Other examples of how heat is being transferred to other body surfaces include the following:
Convention,Conduction,Evaporation and Radiation.Therefore, the diagram above displays the heat transfer from the copper coil carrying current to the water in the steel pan is by induction.
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With e in volts per meter and t in seconds. at t = 0, the field is upward. the plate area is 4. 3 × 10-2 m2. for t > 0, what is the magnitude of the displacement current between the plates?
The magnitude of the displacement current between the plates is [tex]2.1*10^{-8} A[/tex]
Given,
A=4.3*[tex]10^{-2} m^{2}[/tex]
[tex]E=(4.0*10^{5})-(6.0*10^{4}t)\\[/tex]
[tex]i_{d} =ϵ_{0} *\frac{dϕ_{E} }{dt } =ϵ_{0}A\frac{dE}{dt}[/tex]
[tex]i_{d}[/tex]=[tex]ϵ_{0}[/tex]*A*[tex]\frac{d}{dt}[/tex][tex](4.0*10^{5})-(6.0*10^{4}t)[/tex]=[tex]-ϵ_{0} *A*6.0*10^{4}[/tex]
= -[tex](8.85*10^{-12})(4.0×10*^{-2})(6.0×10^{4})[/tex]=[tex]-2.1*10^{-8} A[/tex]
CurrentAn electrical charge carrier flow known as current often involves electrons or atoms lacking in electrons. The capital letter I is frequently used as a symbol for current. Amperes are the common unit and are denoted by the letter A. A coulomb of electrical charge moves past a certain place in one second as one ampere of current does. Franklin current or conventional current are terms used by physicists to describe how current flows from relatively positive to comparatively negative sites. Negatively charged electrons are the most prevalent charge carriers. They move in a somewhat good direction from relatively negative points.
With e in volts per meter and t in seconds. at t = 0, the field is upward. the plate area is 4. 3 × 10-2 m2. for t > 0, what is the magnitude of the displacement current between the plates?
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Will a beam of light that is, at first, in air and oriented perpendicular to the surface of a body of water be deflected as a result of the transition into water?.
It does not deflect, and the light's direction will not modify
When a light ray is an incident from a medium such as air onto a better dense medium such as glass or water, the refracted ray always lies closer to the perpendicular than does the incident ray.
What happens when a light ray departs from one medium to another?Refraction happens when light traverses from one medium to another, changing the speed at which the light travels. This causes light to bend upon incidence with the interface of new material.The frequency of the light ray stays the same when it crosses from one medium to another because it depends on the source of light. But the wavelength and speed vary because they depend on the medium via which the light passes.To learn more about Lightray, refer to:
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Bootes is a constellation found near __________________
-The Big Dipper
-Orion
-Taurus
Answer:
The Big Dipper
Explanation:
Bootes is near the "Big Dipper" which is itself part of Ursa Major.
What constant acceleration is required to increase the speed of a car from 27 mi/h to 53 mi/h in 3 s? (round your answer to two decimal places. ) ft/s2
The constant acceleration is required to increase the speed of a car from 27 mi/h to 53 mi/h in 3 s will be 0.01 ft /[tex]s^{2}[/tex]
Velocity defines the direction of the movement of the body or the object. Speed is primarily a scalar quantity. Velocity is essentially a vector quantity. It is the rate of change of distance. It is the rate of change of displacement.
Acceleration, rate at which velocity changes with time, in terms of both speed and direction. A point or an object moving in a straight line is accelerated if it speeds up or slows down.
initial velocity = 27 m/h = 0.0075 m/s
final velocity = 53 m/h = 0.0147 m/s
acceleration = ( final velocity - initial velocity ) / time
= (0.0147 - 0.0075) / 3
= 0.0024 m/[tex]s^{2}[/tex]
= 0.01 ft /[tex]s^{2}[/tex]
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If a 3. 0 v potential difference causes a 0. 60 a current to flow through a resistor, its resistance is_________.
The resistance is 5 Ω.
Resistance is a degree of the opposition to present day waft in an electrical circuit. Resistance is measured in ohms, symbolized via the Greek letter omega (Ω). Ohms are named after Georg Simon Ohm (1784-1854), a German physicist who studied the connection between voltage, modern-day and resistance.
Ohm's regulation states that the voltage or capacity difference among points is without delay proportional to the modern or energy passing through the resistance, and directly proportional to the resistance of the circuit. The system for Ohm's regulation is V=IR.
Potential difference (V) = 3.0 volt
current (I) = 0.60 ampere
V = IR
Resistance (R) = v/I
= 3/0.60
= 5 Ω
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A photon of blue light has a ____ frequency and a _____ wavelength than a photon of red light.
A photon of blue light has a higher frequency and a lower wavelength than a photon of red light.
The wavelength of light is the distance between corresponding points in two adjacent light cycles, and the frequency of light is the number of cycles of light that pass a given point in one second.
Wavelength is typically represented by λ, the lowercase Greek letter lambda, while frequency is represented by ν, the lowercase Greek letter nu
Red light has a wavelength of ~700 nm, and a frequency of ~4.3*[tex]10^{14}[/tex] Hz. Visible light makes up just a small part of the full electromagnetic spectrum.
Wavelength of blue light: 450nm and frequency of blue light 6.66 * [tex]10^{14}[/tex] Hz
Blue light has higher frequency, shorter wavelength and more energy.
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You are holding two balloons of the same shape and size. one is filled with helium, and the other is filled with ordinary air. On which balloon is the buoyant force greater?
Answer:
B (buoyant force) = weight of air displaced - weight of balloon
Both balloons will displace the same amount of air but the weight of the balloon filled with He is much less and will experience a greater buoyant force - actually if a balloon is filled with air its weight would be the same as the weight of the air displaced and there would be no buoyant force
When testing for friction loss coefficients, departments that use a pitot tube should use:_________.
When testing for friction loss coefficients, departments that use a pitot tube should use Smooth bore nozzle
The pitot tube is a simple and convenient instrument to measure the difference between static, total and dynamic pressure (or head) .
It is a device used to measure velocity in pipe, wide tunnel, aero planes , etc. Pitot tube is completely based on its principle that if the velocity of flow at any point becomes Zero. A pressure measuring instrument used to measure fluid flow speed, especially used to determine the airspeed of an aircraft
Smooth bore nozzles also use the lowest engine pump pressures, allowing for maximum reach. Smooth bore nozzles are often referred to as solid bore nozzles because they produce a solid stream to provide maximum reach and penetration to the seat of the fire.
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In a particular electrolysis process, eocathode = -1. 151 v and eoanode = 1. 548 v. what minimum voltage must be applied to drive the nonspontaneous process?
In a particular electrolysis process, Eο cathode = -1.151 v and Eο anode = 1.548 V. The minimum voltage must be applied to drive the non-spontaneous process is 2.699V.
Electrode Potential Or Voltage is the emf of a galvanic cell where emf is called as the Electromotive force.
Electrode Potential of a spontaneous cell is positive. Hence to make a non-spontaneous cell into a spontaneous cell, the voltage or potential applied should be positive to make the cell working.
We know that,
Electrode Potential = Electrode Potential of cathode - Electrode Potential of anode
where, Electrode Potential of cathode = -1.151V
Electrode Potential of anode = 1.548V
On substituting,
⇒ Electrode Potential = -1.151V - 1.548V
⇒ Electrode Potential = - 2.699V
Hence, the minimum voltage to drive a non-spontaneous cell into a spontaneous cell should be at least 2.699V.
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Assuming the diode is ideal but with a forward voltage drop of. 65 volts, what is the voltage vr1, if v1=6v, and r1=921ω?
The ideal diode's current is 0.064 mA at a forward biased voltage drop of 65 V.
An ideal diode is a particular kind of electronic component that has two terminals, and only permits current to flow in one direction, with less zero resistance in one direction and infinite resistance in another.
The most often used type of diode is a semiconductor diode.
It is a crystalline semiconductor part with a PN junction that is connected to two electrical terminals.
We have provided values here.
[tex]V_{2}[/tex]=65 volts
[tex]v_{1} =6v[/tex]
[tex]r_{1} =921w[/tex]
[tex]I=V_{2 - V_{1} /I[/tex]= 65-6/921=0.064
The ideal diode's current is 0.064 mA at a forward biased voltage drop of 65 V.
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The potential difference across a and b is 15 v. determine the electrical charge on the 3 μf capacitor?
The potential difference across a and b is 15 v. determine the electrical charge on the 3 μf capacitor will be 45 * [tex]10^{-6}[/tex] C
Capacitance, property of an electric conductor, or set of conductors, that is measured by the amount of separated electric charge that can be stored on it per unit change in electrical potential. Capacitance also implies an associated storage of electrical energy.
Charge (Q) stored in a capacitor is the product of its capacitance (C) and the voltage (V) applied to it. The capacitance of a capacitor should always be a constant, known value. So we can adjust voltage to increase or decrease the cap's charge. More voltage means more charge, less voltage... less charge.
charge = capacitance * voltage
Q = CV
= 3 * [tex]10^{-6}[/tex] * 15 v
= 45 * [tex]10^{-6}[/tex] C
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The shoemaker-near spacecraft explored two asteroids, mathilde and eros. a big difference between them is that:________.
A big difference between Mathilde and Eros is that Mathilde represents a group of separate rocks whereas Eros is a solid rock.
What is an asteroid?An asteroid is a celestial body composed of different types of rocky materials (generally clay but also silicate) and also metals (especially Fe).
An asteroid may have different sizes and some of them can be huge as dwarf planets that travel across the universe.
In conclusion, a big difference between Mathilde and Eros is that Mathilde represents a group of rocks whereas Eros is a solid rock.
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You measure an angle of 21. 1 when the light passes through a grating with 610 lines per mm. what is the wavelength of the light?
The wavelength of the light is 590nm
wavelength of the light=λ
Given,
The equation for a diffraction grating to use here is dsinθ = mλ
d=1/610 lines per mm=1.639*[tex]10^{-6}[/tex], m=1, θ=21.[tex]1^{0}[/tex]
λ=1.639*[tex]10^{-6}[/tex] * sin21.[tex]1^{0}[/tex]/1 =590nm
WavelengthThe wavelength, which in physics refers to the length over which a periodic wave repeats, is its spatial period. It is the distance between two successive corresponding wave points of the same phase, such as two neighbouring crests, troughs, or zero crossings, and it is a feature of both travelling waves and standing waves, as well as other spatial wave patterns. The spatial frequency is defined as the wavelength's inverse. The Greek letter lambda, or "wavelength," is frequently used to represent it. Additionally, sinusoidal wave envelopes, modulated waves, and waves created by the interference of several sinusoids are also commonly referred to as having a wavelength.
You measure an angle of 21. 1 when the light passes through a grating with 610 lines per mm. what is the wavelength of the light?
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What happens to the reactance in a purely inductive load if we increase the driving angular frequency?
The reactance in a purely inductive load if we increase the driving angular frequency will also increase .
An inductor is defined as a passive component that is used in most electrical circuits to store energy in the form of magnetic energy when electric current flows through it. It is also known as the coil, choke, or reactor. It is a two-terminal electrical component that is characterized by its inductance.
Inductive reactance is the property of an inductive coil that resists the change in alternating current (AC) through it and is similar to the opposition to direct current (DC) in a resistance.
Inductive reactance = angular frequency * inductance
X (L) = ω L
The inductive reactance of an inductor is directly proportional to angular frequency . Hence , if reactance in a purely inductor increases if there is an increase in angular frequency .
The slope shows that the “Inductive Reactance” of an inductor increases as the supply frequency across it increases. Then we can see that at DC an inductor has zero reactance (short-circuit), at high frequencies an inductor has infinite reactance (open-circuit).
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What is the distance to the nearest antinode from the fixed end of a guitar string vibrating at its first harmonic?
What is the distance to the nearest antinode from the fixed end of a guitar string vibrating at its first harmonic? /4
What is antinode in a guitar?The wave at every given instant resembles a graph of a sine wave because the antinodes alternate in the wave's displacement direction. The nodes on a guitar string are the locations where harmonics can be produced the greatest, especially at the 12th fret. The sound is muffled by touching the antinodes.
Halfway between the string's anchor points and the node, or between 1/4 and 3/4 of the string's overall length, are the most audible and vibrating points of these harmonics (called antodes).
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How wide in m is a single slit that produces its first minimum for 631-nm light at an angle of 12. 0°? m
The single slit is 3.34 * [tex]10^{-5}[/tex] m wide .
In the single-slit diffraction experiment, we can observe the bending phenomenon of light or diffraction that causes light from a coherent source to interfere with itself and produce a distinctive pattern on the screen called the diffraction pattern.
Diffraction is evident when the sources are small enough that they are relatively the size of the wavelength of light.
Fringe width is defined as the distance between any two consecutive bright or dark fringes.
Using the formula ,
nλ = a sin θ
a = nλ /sin θ
a = (1) (631 *[tex]10^{-9}[/tex] ) / sin (12)
a = 3.34 * [tex]10^{-5}[/tex] m
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Give a qualitative description of the skydiver's motion after jumping out of the plane.
Explanation:
They will have not much control over their speed or rotational energy. they will carry a lot of gravitation potential energy which will get converted to kinetic energy as they fall through the atmosphere. They will reach their terminal velocity, the fastest they can travel with earth's gravity before they pull their parachute, when they use a parachute to extend their surface area, increasing wind resistance. this allows them to land safely.