Net external force in the x- direction=--140.8 N
Briefly:-We are given that
F1= 78.4 N(right)
F2= 229.2 N(left)
F3= 345.9 N(upward)
F4= 248.9N (downward)
We have to find the net external force in the x- direction.
Net external force along x- direction=Fx=F1-F2
229.2-78.4=-140.8 N
Net external force along y- direction=Fy=F3-F4
=345.9-248.9
=97 N
Hence, net external force in the x- direction=--140.8 N
What is a good illustration of a net external force?Consider the scenario when a body is simultaneously being dragged down by its weight and lifted by a lifting force. The vector sum of the lifting force and the weight represents the net force applied on that object.
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2) Forces F1, F2, and F3 act on the structure of Figure shown overhead view. We wish to put the structure in equilibrium by applying fourth force at a point such as P. The fourth force has vector components and Fh: We are given that &= 2.5 m, b-3.0 m, c-1.5 F1-22N, F2-12 N, F3-5 N.Find (a) Fv, (b) Fh, dan (c)
Forces Fv = 33N, Fh = 3.75 N, d=1.334m
a)For net force to be zero in vertical direction Fv = F1+ F2 = 33N
b)For net force to be zero in horizontal direction Fh = F3 = 3.75 N
c)Net torque about point O = 0
Fv.d - F2.b - F3.a= 0
33d - 10.5 x 3.3 - 3.75 x 2.5 = 0
d=1.334m
A force is a push or pull that an object experiences as a result of interacting with another object. There is a force acting on each object whenever two objects interact.
Contact forces are the kinds of forces that develop when two interacting objects appear to be in physical contact with one another. Frictional, tensional, normal, air resistance, and applied forces are some examples of contact forces.
When two things are interacting but are not physically touching each other, action-at-distance forces can still create a push or pull.
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Find the acceleration
Answer:
5m/s²
Explanation
100N and 80N of forces act in the same direction so we will add them together
100N + 80N = 180N
while 30N force act in opposite direction so we will have to subtract
180N – 30N = 150N
force = 150N
mass = 30 kg
acceleration = ?
using the formula
f = m × a
[tex]a = \frac{f}{m} [/tex]
[tex]a = \frac{150}{30} = {5ms}^{ - 2} [/tex]
I hope this helps
find the work done by the force field on a particle that moves along the helix .
Answer:
77
Explanation:
Sam's job at the amusement park is to slow down and bring to a stop the boats in the log ride.
Part A
If a boat and its riders have a mass of 800 kg and the boat drifts in at 1. 4 m/s how much work does Sam do to stop it?
The amount of work which Sam does need to stop the boat is 784Joule if boat mass is 800kg and boat drift in 1.4m/sec.
We know that according to work-energy theorem, change in kinetic energy of the body from one speed to another is equivalent to amount of work done by all forces acting on the body.
So, here we can see that final speed of boat is =0m/sec since Sam need to stop it.
Initial speed of boat is 1.4m/sec.
Also, we know that kinetic energy is given by the below formula:
Kinetic energy=(1/2)mv²
where m is the mass of the body
and v is the speed of the body
Now, from work energy theorem, we get
=>W=(1/2)m[tex]v^2_2[/tex] - (1/2)m[tex]v^2_1[/tex]
=>W=0-(1/2)×800×(1.4)²
=>W= - 400× 1.4 × 1.4
=>W = -400×1.96
=>W= -784Joule
Here negative sign denotes work has to done against the original motion of boat.
Hence, amount of work needs to be done by Sam is 784Joule.
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which option describes a vector quantity?(1 point) responses it has magnitude, but no units or direction. it has magnitude, but no units or direction. it has no magnitude, units, or direction. it has no magnitude, units, or direction. it has magnitude, units, and direction. it has magnitude, units, and direction. it has magnitude and units, but no direction. it has magnitude and units, but no direction.
Dimensions, units, and direction are all present in a vector quantity. So, the first selection is the right one.
A quantity with both magnitude and direction is referred to in physics as a vector quantity. A vector is referred to be a unit vector if its magnitude value is one.
As an illustration, let's say a man is travelling northeast in a car at a speed of 90 km/h. The magnitude of the velocity and its direction are therefore necessary for defining the velocity. It is a vector quantity, therefore, in that sense. Other types of vector quantities include weight, force, momentum, acceleration, displacement, gravitational fields, current, and so on.
The homes we live in and the items we use on a daily basis all have three dimensions: height, length, and breadth.
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9-28. at what distance downwind will the plume from a stack begin mixing downward if an inversion layer exists at a base height of 265 m and the wind speed is 4.0 m/s on an overcast summer afternoon? the effective stack height is 85 m.
A factory releases a plume into the atmosphere on an overcast summer afternoon at x = 23.96 km
Plume standard deviation
Sz= 0.47 (L-H)
= 0.47 (514-54)
= 216.2
for overcast Condition stability class is D
We Know S₂ = exd + f
for class D we have C = 44.5
d= 0.516
f = -13
216.2= 44.5 [tex]x^{0.516}[/tex] - 13
x = 23.96 km
The Old English word plmfether is where the modern term plume originates. Further back, the Latin word pluma, which means "feather" or "down," may be found. A big puff of smoke or any other material that expands into the air from a single source is frequently referred to as a plume.
A huge amount of something that rises into the air in a column is called a plume of smoke, dust, fire, or water. Everywhere around Kabul, one could see the black smoke cloud rising.
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Question 8 of 10 What effect does a catalyst have on the energy of a reaction system? A. It increases the initial energy of the reactants. B. It reduces the final energy of the products. C. It reduces the activation energy. D. It has no effect on the energy of a reaction system.
Answer: It reduces the activation energy.
Explanation:
A catalyst is a material that, without being consumed by the process, speeds up a chemical reaction or decreases the temperature or pressure required to initiate one. The addition of a catalyst to a reaction is known as catalysis.
The bonds holding together the atoms in molecules are ruptured, altered, and repaired during a chemical reaction, recombining the atoms to form new molecules. By decreasing the activation energy, the energy hurdle that must be cleared for a chemical reaction to take place, catalysts improve the efficiency of this process. As a result, catalysts facilitate the formation of chemical bonds between atoms to create novel combinations and new compounds. Chemical processes are accelerated and become more energy-efficient when catalysts are used.
FIGURE shows a U-shaped conducting rail that is oriented vertically in a horizontal magnetic field. The rail has no electric resistance and does not move. A slide wire with mass and resistance can slide up and down without friction while maintaining electrical contact with the rail. The slide wire is released from rest.
a. Show that the slide wire reaches a terminal speed , and find an expression for .
b. Determine the value of if and
The magnetic force is [tex]F_{B}[/tex] = B ( B.L.v/R). L = [tex]\\\frac{B^{2} L^{2}v^{} }{R}[/tex]and the terminal velocity is 0.6487 m/s.
What is Magnetic force?
One of the four fundamental forces of nature, the electromagnetic force, results in the magnetic force, which is brought about by the motion of charges. When two charge-containing objects move in the same direction, a magnetic attraction pulls them together.
Calculation:
(a) Magnetic force, on the slide wire is Fb = B.I.L
the magnitude of induced emf from faradays law ε = dΦ/dt
= d ×( B.A)/ dt
= B × (dA/dt)
= B × (d(Lx)/dt)
=B × L × (d (x)/dt)
= B × L×v
But the induced current is I = ε/R
= BLv/R
Now, the magnetic force is [tex]F_{B}[/tex] = B ( B.L.v/R).L
= [tex]\\\frac{B^{2} L^{2}v^{} }{R}[/tex]
if the magnetic force is equal to the weight of the wire.
v = (mg. R)/ B² × L²
(b) terminal velocity = 9 *[tex]10^{-3}[/tex]* 9.8 * 0.10 / [tex]0.53^{2}[/tex] * [tex]0.22^{2}[/tex] = 0.6487 m/s.
Hence, the magnetic force is [tex]F_{B}[/tex] = B ( B.L.v/R). L = [tex]\\\frac{B^{2} L^{2}v^{} }{R}[/tex]and the terminal velocity is 0.6487 m/s.
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Why is an electric current only produced if there is a closed circuit?
Without a closed circuit, electrons cannot flow from one point to another.
A closed circuit allows magnets to move back and forth, creating an electric current.
An open circuit causes electrons to escape the wire, stopping the electric current.
With an open circuit, the magnetic field created would cause the current to stop flowing.
An electric current only produced if there is a closed circuit because without a closed circuit, electrons cannot flow from one point to another. That is option A.
What is an electric current?An electric current is defined as the flow of charged particles through an electrical conductive pathway or space.
There are two types of electric current such as direct current (DC) and alternating current (AC).
For a current to flow to a circuit the circuit must be closed through the switch. This is because a closed circuit ensures that the pathway is complete to prevent the loss of energy.
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a loudspeaker diaphragm is oscillating in simple harmonic motion with a frequency of 440 hz and a maximum displacement of 0.75 mm. what are the (a) angular frequency, (b) maximu
The angular frequency w is 2.8 x 10^3 rad/s and the velocity is 2.1m/s
a loudspeaker diaphragm is oscillating in simple harmonic motion with a frequency of 440 hz and a maximum displacement of 0.75 mm
We need to calculate the angular frequency and the maximum displacemnt.
a) The problem gives the frequency f=440Hz, where the SI unit abbreviation Hz stands for Hertz, which means a cycle-per-second. The angular frequency ω is similar to frequency except that ω is in radians-per-second. Recalling that 2π radians are equivalent to a cycle, we have ω=2πf≈2.8∗10^3 rad/s.
(b) In the velocity amplitude v = wx
with x =0.00075m and the above value for ω, this expression yields v = 2.1m/s.
Therefore, when the a loudspeaker diaphragm is oscillating in simple harmonic motion with a frequency of 440 hz and a maximum displacement of 0.75 mm, The angular frequency w is 2.8 x 10^3 rad/s and the maximum velocity is 2.1m/s
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find the intensity of a 1.0- mw class 2 laser with beam diameter 2.4 mm .
The intensity of laser beam is [tex]$318.2 \mathrm{~W} / \mathrm{m}^2$[/tex].
What is intensity?
In physics, the power transferred per unit area is known as the intensity or flux of radiant energy, where the area is measured on a plane perpendicular to the direction of the energy's propagation. In the SI system, it has units watts per square metre, or kg⋅s⁻³ in base units.
The standard expression for the intensity of beam is given as,
I = P/A
Here, P is the power of the laser and A is the cross-sectional area of the beam. And its value is,
[tex]$$\begin{aligned}& A=\pi / 4 \times d^2 \\& A=\pi / 4 \times\left(2 \times 10^{-3}\right)^2 \\& A=3.142 \times 10^{-6} \mathrm{~m}^2\end{aligned}$$[/tex]
Then intensity is,
[tex]$$\begin{aligned}& I=\left(1 \times 10^{-3}\right) /\left(3.142 \times 10^{-6}\right) \\& I=318.2 \mathrm{~W} / \mathrm{m}^2\end{aligned}$$[/tex]
Thus, the intensity of laser beam is[tex]$318.2 \mathrm{~W} / \mathrm{m}^2$[/tex].
Complete question: Lasers are classified according to the eye-damage danger they pose. Class 2 lasers, including many laser pointers, produce visible light with no greater than 1.0 mW total power. They're relatively safe because the eye's blink reflex limits exposure time to 250 ms.Find the intensity of a 1-mW class 2 laser with beam diameter 24 mm .
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when a vehicle travels around a corner or curve, which drive wheel must travel the greatest distance?
When a vehicle travels around a corner or curve, the outside wheel must travel the greatest distance, it is based on the car differential.
When a car turns a corner, one wheel is on the "inside" of a turning arc, and the other wheel is on the "exterior." Thus, the exterior wheel has got to turn speedier than the interior one in order to cover the greater separation within the same sum of time. In this way, since the two wheels are not driven at the same speed, a differential is essential. A car differential is set midway between the driving wheels, on either the front, raise, or both axes, depending on the wheel-drive car. In rear-wheel drive cars, the differential changes over the rotational movement of the transmission shaft which lies parallel to the car’s movement to the rotational movement of the half-shafts (on the closes of which are the wheels), which lie opposite to the car’s movement.
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a yo-yo can be thought of a solid cylinder of mass m and radius r that has a light string wrapped around its circumference (see below). one end of the string is held fixed in space. if the cylinder falls as the string unwinds without slipping, what is the acceleration of the cylinder?
The acceleration of the cylinder is 6.5 m/s^2 that means velocity of the cylinder is increasing by 6.5 m/s in one second.
The change in velocity per unit of time; it is a vector quantity and must have a direction, symbol is a and SI unit is m/s/s or m/s^2.
Since velocity is a vector quantity involving speed and direction, acceleration occurs when the speed of an object changes, and/or the direction of the object changes.
The definition of acceleration can be expressed mathematically as, a = Vf-Vi/t.
where, vf is the final velocity and vi is the initial velocity. The change in time is usually expressed as simply t because you assume that the initial time was zero.
The net force acting on the yo-yo is
Fnet = mg-T
ma=mg-T
now T= mg-ma
net torque acting on the yo-yo is
Tnet = Iα
I= moment of inertia (= 0.5 mr^2 )
α = angular acceleration
Tnet = 0.5mr^2(a/r)
Tr= 0.5mr^2(a/r)
(mg-ma)r=0.5mr^2(a/r)
a(1/2+1)=g
a= 2g/3
a= 2×9.8/3 = 6.5 m/s^2
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Which one of the following relationship between the wave length (λ) and frequency and the speed (C) of the electromagnetic wave is correct?A. C=v+λ
B. C=λv
C. C=vλ
D. C=1vλ
Inverse proportions exist between frequency and wavelength. The speed of light has a direct relationship with f and, or c=f.
What exactly is an electromagnetic wave?
electromagnetic wave, noun: any of the waves that are transmitted by periodic fluctuations in both the electric and magnetic fields and which include radio waves, infrared rays, visible light, ultraviolet rays, X-rays, and gamma rays.
How would you define an electromagnetic wave example?
Electromagnetic waves include those produced by radio and television signals as well as microwaves. Just the wavelength separates them from one another. The separation between one wave's peak and the next is known as the wavelength.
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the focal length of a converging lens is 0.50 meters. an object is placed 1.0 meters from the lens. the distance between the lens and the image is (5 points) 1.0 m 0.50 m 0.25 m 1.5 m
The distance between the lens and the image is 1m.
To solve this problem we will simply use the lens equation.
[tex]$1 / d+1 / i=1 / f$[/tex]
Where d is the object distance, i is the image distance and f is the focal point distance.
We can solve this equation for [tex]$\mathrm{i}$[/tex] :
[tex]$1 / d+1 / i=1 / f$[/tex]
[tex]$1 / i=(1 / f-1 / d) \cdot \frac{d f}{d i}$[/tex]
[tex]$1 / i=\frac{d-f}{d d}$[/tex]
[tex]$i=\frac{f d}{d-f}$[/tex]
Now we plug in the numbers:
[tex]$$\begin{aligned}& i=\frac{f d}{d-y} \\& i=\frac{0.5 \cdot 1}{1-0.5} \\& i=1 \mathrm{~m}\end{aligned}$$[/tex]
The answer is A.
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There are no results for Particles q1 = -66.3 UC, q2 = +108 uC, and 93 = -43.2 uC are in a line. Particles q1 and q2 are separated by 0.550 m and particles q2 and q3 are separated by 0.550 m. What is the net force on particle q2? Remember: Negative forces (-F) will point Left Positive forces (+F) will point Right + 108 MC 92 -43.2 MC 93 0.550 m -66.3 MC 91 0.550 m
The total of all forces acting on an object is known as the net force. A mass can accelerate due to net force.
How to calculate net force ?The total of all forces acting on an object is known as the net force. A mass can accelerate due to net force. Whether a body is at rest or in motion, it is subject to another force. When there are a lot of forces acting on a system, the term "net force" is used.
here r12 = 0.550m r23= = 0.550m Then the distance from the first charge to the third one will be:
r13 =r12+r23=0.550+0.550 = 1.1m
According to the Coulomb's law, the net force on particle q2 will be equal to the sum of the forces on particle q2 from the particle q1 and q3.
F3+=F13+F23=q1q2/r²13 + k q3q2/r²23
Where k = 9×[tex]10^{9}[/tex] N m²/C²
Substituting numerical values, obtain:
F3= 9×[tex]10^{9}[/tex](-66.3 × [tex]10^{-6}[/tex])(-43.2×9×[tex]10^{-6}[/tex])/1.45²+9 ×[tex]10^{9}[/tex] 108×[tex]10^{-6}[/tex](-43.2 ×[tex]10^{-6}[/tex])/0.550²
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Receptacle is defined as a point in
the electrical system where
electrical energy is
A. Uninstalled
C. Installed
B. Supplied for electrical use
D. Supplied for direct wiring
Receptacle is defined as a point in the electrical system where electrical energy is Installed.
What is receptacle?The Latin term receptaculum, which denotes a location to receive and keep items, is the source of the English word "receptacle."
Receptacles and electrical outlets are types of sockets that are used to create an electrical connection between a power source and an electronic device.
There are several different types of outlets, including two-pronged outlets, grounded outlets, tamper-resistant outlets, arc fault circuit interrupter outlets, surge suppression outlets, and USB outlets.
According to Section 210.52 of the US National Electrical Code, every kitchen, bedroom, living room, family room, and other room with a designated living area must have an electrical outlet. They must be placed at intervals of no less than twelve feet along the floor line.
Correct option: (B) Installed
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Label the structures of a typical vertebra. Pedicle ook Body of vertebra rences Lamina Vertebral arch Articular facet Vertebral foramen Transverse process Spinous Name the large bony area. process ME M < Prev 10 of 13 Next
Answer: i love you babe
Explanation:
The structure of a typical vertebra includes Pedicle, body, vertebral arch, etc. These are discussed in the section below.
Pedicle: The sides of the vertebral arch are formed by a pair of short, thick bony structures that protrude from the back of the vertebral body.
The thick, anterior section of the vertebra known as the "body" is what supports and supports the weight of the vertebral column.
Lamina: A pair of flat plates that combine to create the back of the vertebral arch and extend posteriorly from the pedicles.
The vertebral arch, which is made up of the pedicles and laminae, forms the posterior opening of the vertebra and surrounds and shields the spinal cord.
Articular facet: The superior and inferior portions of the vertebral arch's smooth, flat surfaces that form the facet joints when they articulate with the surrounding vertebrae.
The spinal cord goes through the vertebral foramen, which is the vertebral arch's main aperture.
Transverse process: Laterally extending bony projections from the sides of the vertebral arch that act as points of attachment for ligaments and muscles.
Spinous process: A single, posterior bony projection that arises from the laminae's junction and serves as a point of attachment for ligaments and muscles.
Thus, the vertebral body is the broad bone region that the question alludes to.
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Your question seems incomplete, the probable complete question is:
Label the structures of a typical vertebra. Pedicle ook Body of vertebra rences Lamina Vertebral arch Articular facet Vertebral foramen Transverse process Spinous Name the large bony area. process ME M < Prev 10 of 13 Next
a ball is thrown vertically into the air. when it returns after an interval of two seconds
The final possible sentence is, "It accelerates downward vertically at a rate of 10 m/s/s when it leaves the hand."
Why would the ball Accelerate downwards?The ball experiences the effects of the acceleration caused by gravity at every moment of its motion (10 m/s2 is assumed). Whatever the ball's elevation, this is true. Gravitational acceleration is always downward-pointing (not up).
The motion is kinematically defined by a parabola with branches heading downward as a function of time (motion under constant acceleration), with the vertex marking the highest height the ball can reach in the absence of air resistance. The time spent moving up and down is equal because the two branches (which represent motion in both directions) are equally spaced from the vertex.
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The given question is incomplete, the complete question is:
A ball is thrown vertically into the air and when it returns after an interval of 2 seconds, it is caught. Which one of the following statements is true if the acceleration due to gravity is 10 m/s/s and air resistance can be neglected?
The acceleration at the top of its flight is 10 m/s/s upwards.
The acceleration at the top of its flight is 0 m/s/s.
The time taken for the descending motion does not equal the time taken for the ascending motion.
The acceleration after it leaves the hand is 10 m/s/s downwards.
Drag the labels onto the epidermal layers. Reset Help Stratum basale Stratum lucidum Dermis Dermal papilla Stratum corneum Basement membrane Stratum granulosum Epidermal ridge Stratum spinosum
Stratum spinosum, stratum lucidum, epidermal ridge, stratum basale, basement membrane, dermis, dermal papilla, stratum granulosum, stratum carenum.
Although the real keratinocytes originate in the stratum basale, keratinization starts in the stratum spinosum. Since they are actively producing the fibrilar proteins known as cytokeratin, which accumulate within the cells clumping together to form tonofibrils, they feature big pale-staining nuclei. Desmosomes, which enable solid connections to form between neighbouring keratinocytes, are created from tonofibrils. Langerhans cells may also be seen in the stratum spinosum. Desmosomes are used to connect these. When desmosomes are stained with H&E, the microfilaments between them shorten, giving them their spiny (Latin, spinosum) appearance.
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I am from _______ (specific ordinary item), from _______ (product name) and _______. I am from the _______ (home description... adjective, adjective, sensory detail). I am from the _______ (plant, flower, natural item), the _______ (plant, flower, natural detail) I am from _______ (family tradition) and _______ (family trait), from _______ (name of family member) and _______ (another family name) and _______ (family name). I am from the _______ (description of family tendency) and _______ (another one). From _______ (something you were told as a child) and _______ (another). I am from (representation of religion, or lack of it). Further description. I'm from _______ (place of birth and family ancestry), _______ (two food items representing your family). From the _______ (specific family story about a specific person and detail), the _______ (another detail, and the _______ (another detail about another family member). I am from _______ (location of family pictures, mementos, archives and several more lines indicating their worth). Brainstorming ideas: "I'm From" Idea Gathering Smells from your childhood Places in your home and neighborhood Close family members Lands and places your family is from Sayings in your family Songs/stories your family sings/tells Where you keep memories Tastes from your childhood
Bobby pins, stacks of newspapers, grandma's teeth in a glass. 2. Items found in your yard/things you used to do in the yard: dog bones, broken fences, flashlight tag, a hose coiled like a snake. (Feel free to think metaphorically.)
What's an ordinary item?
Very roughly, ordinary objects are objects belonging to kinds that we are naturally inclined to regard as having instances on the basis of our perceptual experiences: dog, tree, table, and so forth
What has made The Ordinary so popular?
The Ordinary differs from other beauty companies because it combines research with straightforward packaging, high active ingredient concentrations, and affordable pricing points. The Ordinary offers skin care, hair care, complete body care, and makeup with an emphasis on straightforward, scientifically supported ingredients.
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What does the idea of multifactorial causation in drug effects suggest?
Taking several different drugs at the same time produces unpredictable effects.
Each person will have the same physiological response to a drug, but there can be different psychological responses.
Taking several different drugs at once increases their effectiveness. T
he effects of a drug depend on the dosage and the user’s personal makeup and experience.
According to the theory of multifactorial causation in drug effects, a drug's effects are influenced by dosage, the user's individual characteristics, and past experiences.
Dosage forms, sometimes also referred to as unit doses, are pharmaceutical drug products in the form in which they are marketed for use, with a particular combination of active ingredients and inactive ingredients (excipients), in a particular configuration (such as a capsule shell, for example), and apportioned into a specific dose. If two items are both amoxicillin, for instance, one comes in 500 mg capsules and the other in 250 mg chewable tablets. When each drug product is separately packaged, the term "unit dose" can also occasionally refer to non-reusable packaging), while the FDA distinguishes between the two terms as "packaging" or "dispensing" of unit doses. Depending on the situation, the term "multiple-unit dosage" might apply to various drug products packaged together or to a single drug product containing multiple pharmaceuticals.
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you have a galaxy that is too far away to see individual stars, but you can see a little smudge of light from the galaxy. what would be the best way to find the distance to this galaxy?
The best way to find the distance to galaxy is using a highly resolved telescope like Hubble space telescope.
A giant blue star that spans more than half the universe, commonly known as Icarus, is the most distant single star ever seen. They are usually too faint to see, even with the world's largest telescopes. But astronomers using NASA's Hubble Space Telescope were able to locate this distant star and set new distance records, thanks to a natural variant that greatly amplifies the star's faint glow. They also used Icarus to test dark matter theory and study the composition of foreground clusters of galaxies.Hidden in a very distant spiral galaxy, this star is so far away that it took her nine billion years for its light to reach Earth. It seems like when the universe was about 30% of its current age.The cosmic feature that makes this star visible is a phenomenon called gravitational lensing. The gravity of massive foreground clusters of galaxies acts like a natural lens in the universe, bending and amplifying light. Light from a single background object may appear as multiple images. Light is greatly magnified and bright enough to see very faint and distant objects.To learn more about spiral galaxy -
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what features of the milky way's appearance in our sky led scientists to conclude that it is much wider than it is thick?
The Milky Way is the slender ribbon of many resolvable stars. unique aspects of the milky way's appearance in our sky prompted astronomers to infer that it is far broader than it is thick.
The Milky Way is the galaxy that contains our solar system, and the term refers to how the galaxy appears to us on Earth: as a hazy strip of light in the night sky made up of stars that are too close together to be seen individually. The title "Milky Way" comes from the Latin route lactea, which is a translation of the Greek (galaktikos kklos), which means "milky circle." From Earth, the Milky Way appears as a band because its disk-shaped structure is seen from within. In 1610, Galileo Galilei used his telescope to break the band of light into individual stars for the first time. Most astronomers believed that the Milky Way held all of the universe's stars until the early 1920s.
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suppose a woman does 500 j of work and 9500 j of heat transfer occurs into the environment in the process. what is the change in her internal energy, assuming no change in temperature or consumption of food? (that is, there is no other energy transfer.)
The change in internal energy is 10,000 J.
Given that, Work = 500 J
Heat Transfer = 9500 J
Internal energy can be altered by the temperature difference between a system and its surroundings.
We need to calculate the change in internal energy.
Let us use the equation of internal energy of a system,
ΔU = Q - W
where, Q is heat
W is work done
Let us put the values in the formula,
ΔU = -9500 - 500 = -10,000 J
Negative sign of heat is taken as the heat is lost in the process.
Thus, the change in internal energy is 10,000 J.
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(a) A dc power line for a light-rail system carries 1000 A at an angle of 30.0∘ to Earth’s 5.0×10−5T field. What is the force on a 100-m section of this line? (b) Discuss practical concerns this presents, if any.
A light-rail system's dc power line, which carries 1000 A at an angle of 30.0° to the Earth's 5.0*10^5T field, exerts 2.5N of force on a 100-m portion of this line.
A force in physics is an effect that has the power to alter an object's motion. A force can cause an object with mass to change its velocity, or accelerate (for example, moving from a condition of rest). Intuitively, a push or a pull can also be used to describe force. Being a vector quantity, a force has both magnitude and direction. The SI unit of newton is used to measure it (N). A combination of tram and metro components define the passenger urban rail transit system known as "light rail transit" (LRT).
F = BIlsin(tetha)
F = 5*10^-5*(10^3)(10^2)*sin(pi/6)
F = 5*1/2
F = 2.5N
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a ball of radius 0.200 m rolls with a constant linear speed of 3.60 m/s along a horizontal table. the ball rolls off the edge and falls a vertical distance of 2.10 m before hitting the floor. what is the angular displacement of the ball while the ball is in the ai
Given: radius of ball=0.200m
linear speed=3.60m/s
vertical distance covered by ball=2.10m
ω = rotational speed = v/r = 3.6/0.2 = 18 r/s
t = √(2y/a) = √(2*2.1/9.8) = 0.654 sec
angular displacement(θ) = ωt = 18*.654 = 11.783 rad
Angular Speed:
Angular displacement is defined as "the angle, in radians (degrees, rotation), by which a point or line is rotated in a specified sense about a specified axis". The angle of motion of a body in a circular orbit.
It can be measured with a simple formula. The formula is:
θ=s/r
where
θ is the angular displacement,
s is the distance traveled by the object, and
r is the radius of the circle the object travels.
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write explanation for two dimensional motion
A two dimensional motion is a type of motion takes place in two different directions.
What is two dimensional motion?Two dimensional motion is a type of motion that occurs in two planes of a coordinate system.
In other words, this type of motion takes place in two different directions as opposed to one dimensional motion that only take place in one direction.
A two dimensional motion can occur in both x and y direction or x and z direction or y and z direction. As long the motion happens in two planes or direction it is considered two dimensional motion.
Examples of two dimensional motion include;
A particle moving along a curved path in a plane such as a coin on a carrom boardThus, a motion must occur in two different directions to be considered two dimensional motion.
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what is a wave in which particles of matter vibrate perpendicular to the direction the wave called
A transverse wave is one in which the movie's particle vibrations are parallel to the wave's direction of propagation. A transverse beam's crests and troughs are its high and low points, respectively.
Why is it called a transverse wave?Because the materials pass in a plane that is opposite to the wave's direction, this sort of wave is known as a transverse wave. Electromagnetic or mechanical waves are both examples of transverse waves. Any disturbance that moves through a medium, like a string, is referred to as a mechanical wave.
How are transverse waves formed?A wave that oscillates perpendicular of the wave or its line of propagation is referred to as a wave propagation. When a motion is caused in the molecules that form the medium, longitudinal waves are produced that are perpendicular to the wave's propagation direction.
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for what value of r is the potential energy u(r) equal to the total energy e ? this value of r is called the classical turning point, since this is where a newtonian particle would stop its motion and reverse direction.
For 1/4 value of r is the potential energy equal to the total energy.
What is potential energy?Potential energy is the form of energy that a object gain.
first want to find the value of our, what value of R is the potential energy equal to the total energy? So you are is equal to negative 1/4 pi epsilon naught E squared over R. Which is the potential energy. And E. This is a total energy. So we just set these two values equal to each other. So negative 1/4 pi epsilon naught E squared over R. Is equal to negative M. E. To the fourth divided by eight E squared and squared each squared and R is equal to two. So we can go ahead and solve this. We get R. Is equal to two. Absolutely not H squared divided by pi M. R. E squared. And actually this is just two times A. So the radius is to a. Now part B. We want to find the probability of electron being found in this classically forbidden forbidden region are greater than the classical turning point. So we need, so first of all let's look at the ground state wave function which is one over squared pi a cubed times E. To the negative are over A. This is what will be needed to integrate to find the probability. So the probability goes from R. is equal to two way to sigh.
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