"Dorsiflexion" is the lifting of the front of foot to direct the top of the foot toward the front leg.
Explain the term dorsiflexion?The backward bending then contracting of the hand or foot is known as dorsiflexion.
Your foot's ankle and your hand's wrist are extended in this way. Although the term "dorsiflex" typically refers to the wrist or ankle, you can also do it with your fingers and toes.The ankle joint, that is a joint, can move in the dorsiflexion as well as plantar directions. Dorsiflexion is the lifting of the front of the foot such that the top of the foot travels toward the anterior leg, whereas plantar flexion is the lifting of the heel off the ground as well as pointing the toes downward. The ankle joint can only move in these directions.Thus, Dorsiflexion is the lifting of the front of the foot to direct the top of the foot toward the front leg.
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The complete question is-
what is movement of the foot upwards, as when walking on your heels, called?
multiple choice question.
DorsiflexionPlantarflexionDraw the Lewis structure for KrCl4 and answer the following questions. How many valence electrons are present in this compound? How many bonding electrons are present in this compound? How many lone pair (non-bonding) electrons are present in this compound?
The total number of valence electrons are present in this compound is 36, total bonding electrons are 8, total lone pair electrons are 28
a)The total number of valence electrons are present in this compound
Each chlorine contributes 7 Valence electrons
Krypton atom has 8 valence electrons
total number of valence electrons are 8 + (7 × 4) = 36e
b)Total bonding electrons are 4 single bonds
Therefore, Total bonding electrons are 4 × 2 = 8e
c)Krypton atom has Two lone pairs on it, chlorine has three lone pairs .
Total lone pair compounds are 2 × (4 × 3) = 14 one pairs
Total lone pair of electrons 2 × 14 =28e
An electron in an atom's outer shell is known as a valence electron, and if the outer shell is open, the valence electron can take part in the formation of a chemical bond.
The valence of an element—whether it can bond with other elements and, if so, how readily and with how many other elements—may be determined by the existence of valence electrons. Thus. the electrical. arrangement. of an element has a significant. impact on its. reactivity. A valence electron can only be found in the outermost electron shell of a main-group element; but, in a transition metal, it can also be found in an inner electron shell.
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why should we consider the normal force exerted on the block rather than the gravitational force exerted on the friction block?
A secondary amine, that is. The main organic product that results from the following reaction is 3-dimethylbutan-2-amine.
How can you identify the main reactions products?There are two possible outcomes when an asymmetrical alkene is combined with an asymmetrical reactant like HBr, HCl, or H2O. The main product of this reaction can be predicted using the Markovnikov Rule, which stipulates that hydrogen will be added to the carbon with additional hydrogen.
Why is normal force the antidote to gravity?When a force is applied to a solid surface, the normal force is created. The surface will apply an equal and opposing force to the object in touch in accordance with Newton's third law. The normal force will be attempting to balance the weight of the object due to gravity if it is resting on a level surface.
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Density, temperature, and pressure increase as you move inward in the interior of the Sun. This means that the weight of the star pushing inward at a given radius _________ as you move inward toward the core.
a. increases
b. decreases
c. stays the same
d. There is not enough
Answer:
d
Explanation:
Density, temperature, and pressure increase as you move inward in the interior of the Sun. This means that the weight of the star pushing inward at a given radius _________ as you move inward toward the core.
a. increases
b. decreases
c. stays the same
d. There is not enough
assume that all of the work is useful work and not dissipated by non-conservative forces. what is the efficiency, expressed as a percentage, of the ideal cycle in the problem statement?
The efficiency of the ideal cycle expressed as ratio of work done and heat dissipated by following equation-
[tex]\alpha =\frac{dW}{dq}[/tex]
A non-conservative force is a force acting on an object and the work done by the force on the object depends on the distance traveled. During the motion of a body due to non-conservative forces, mechanical energy is dissipated, so non-conservative forces can be called dissipative gradients. In most cases, lost energy cannot be recovered. Friction is a good example of a non-conservative force.
[tex]\alpha =1-\frac{Q1}{Q2}[/tex]
A force is called a conservative force if it can be written as the gradient of a scalar potential. For example, the electric field can be represented as the gradient of the potential, which is a scalar potential.
E=−∇V
E is the electric field
V is the scalar potential.
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a block of mass 2 kg travels along a horizontal frictionless surface with velocity 3 m/s. the mass collides with another mass, m, and rebounds with velocity -1 m/s. what impulse was delivered to mass m?
A block of mass 2 kg travels along a horizontal friction less surface with velocity 3 m/s. the mass collides with another mass, m, and rebounds with velocity -1 m/s. Thus, impulse was delivered to mass m = 8 kg.m/sec.
What is impulse?Since fast-acting force or "impact" is what is meant when the word "impulse" is used, it is possible to define impulse as "the abrupt force operating on an item for a brief period of time."
In physics, the term "impulse" is used to characterize or measure the impact of force operating gradually to alter an object's motion.
Given that,
mass of block = 2 kg
horizontal friction less surface with velocity = 3 m/s.
the mass collides with another mass m and rebounds with velocity -1 m/s.
So, impulse = mass × (change in velocity)
or, impulse = 2 kg × [3-(-1) m/sec]
or, impulse = 8 kg .m/sec
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In this schematic, the total resistance is 50 ohms. 100 ohms. 1,000 ohms. 100 ohms 10,000 ohms
The total resistance of the given circuit is if the circuit contains 100ohms,1000 ohms,100 ohms and 10,000 ohms resistors.
Resistance is measured in ohms, and it is represented by the Greek letter omega (Ω). Ohms are named after Georg Simon Ohm (1784-1854), a German physicist who concentrated on the connection between voltage, current and resistance. He is credited for planning Ohm's Regulation.
Resistance estimations are regularly taken to demonstrate the state of a part or a circuit.
The higher the resistance, the lower the ongoing current. On the off chance that strangely high, one potential reason (among many) could be harmed guides because of consuming or erosion. The lower the obstruction, the higher the ongoing stream. Potential causes: protectors harmed by dampness or overheating.Since resistors are connected in series, so we know that when resistors are connected in series, total resistance is given by the formula
Rₙ=R₁+R₂+R₃+---------------Rₙ
So, resistors value are 50 ohms. 100 ohms. 1,000 ohms. 100 ohms 10,000 ohms.
Therefore, total resistance is 50+100+1000+100+10000=10250ohm
Hence, total resistance is 10250ohm
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A vacuum-insulated parallel-plate capacitor with plate separation d has capacitance C0.
What is the capacitance if an insulator with dielectric constant κ and thickness d/2 is slipped between the electrodes? Assume plate separation is unchanged.
Express your answer in terms of the variables d, C0, and κ.
C=?
The capacitance if an insulator with dielectric constant κ and thickness d/2 is slipped between the electrodes C = 2K∉A/d
Let A represent the cross-sectional area of the electrodes.
Let C stand for capacitance.
The electric field between the electrodes is denoted by E.
Be the charge per unit area, sigma.
be the permittivity of empty space, and K is assumed to be an insulator's dielectric constant in the question.
It is inserted between the electrodes as d/2.
the current electric field between electrodes.
E equals sigma /2 plus sigma /2.
E = sigma/ ——— As we are aware, E = V /(d/2)
V=E d/2 V=sigma /*d/2
V = dsigma/2 ——— Once more, we are aware of 2.
C = Q/V
C is equal to sigma A/(sigma d/2) Q = sigma A (from equation 2
For an insulator with a dielectric constant of K, C = 2A/d.
C = 2K∉A/d
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Why is the electric field negative?
Since the electric field is proportional to the size of the electric charge, which is always positive, it can never be negative. It is directly related to the size of a charge.
Additionally, as the charge is moved further away, the electric field's strength weakens. Electric field is the Force that a charge experiences divided by the amount of the charge. Thus, we consider the mod of charge as the magnitude. Thus, even in cases when the charge is negative, it turns positive due to the mod. Thus, Electric Field similarly changes to a positive state. Consequently, the electric field is always positive. The experiment is related to the orientation of the electric field line from the positive end to the negative.
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Which of the following techniques are based on the scattering of radiation?
Two methods based on the scattering and absorption of light by a dispersion of colloidal particles are turbidimetry and nephelometry. The detector in turbidimetry is positioned parallel to the source.
Colloidal particles: What are they?
Small solid particles known as colloidal particles are dispersed in a fluid phase. Typically, they range in size from 10 nm to several microns. As long as the buoyancy imbalance between both the nanoparticles and the liquid is not too great, they are now small sufficiently to be sustained in the flow by thermal motion.
How are colloidal particles formed?
Particles of colloidal size are formed by two methods: Dispersion methods: that is, by breaking down larger particles. For example, paint pigments are produced by dispersing large particles by grinding in special mills. Condensation methods: that is, growth from smaller units, such as molecules or ions.
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on a circular path of radius 9 cm in air around a solenoid with increasing magnetic field, the emf is 33 volts. a wire with resistance 4 ohms is placed along the path. what is the current in the wire? a
A wire with resistance 4 ohms is placed along the path. The current in the wire I = 8.25.
calculation,
It is given that,
Radius of the circular path, r = 9 cm = 0.09 m
EMF of the solenoid, E = 33 volts
Resistance of the wire, R = 4 ohms
We need to find the current in the wire. It can be calculated using the Ohm's law. Its mathematical relation is given by :
E= IR
I = E / R
I = 33V / 4 OHM
I = 8.25
The ohm is the usual unit of electrical resistance within the international system of devices ( SI ). Ohms also are used, when increased through imaginary numbers, to indicate reactance in alternating-modern ( AC ) and radio-frequency ( RF ) programs.
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How are sound waves and mechanical waves related?
The law of conservation of energy states that (1 point) Group of answer choices all energy in the universe comes from the sun and remains in the same form energy is neither created nor destroyed; it is transformed and transferred new energy within a system is converted or transferred and destroyed as it is used energy is created from the sun and is transformed from one type to another
The law of conservation of energy states that energy is neither created nor destroyed; it is transformed and transferred (option B).
What is the law of conservation of energy?The law of conservation of energy is a principle stating that energy may not be created or destroyed but can only be transformed i.e. converted from one form to another.
This means that a system always has the same amount of energy, unless it's added from the outside.
The law states that the total energy of an isolated system remains constant; it is said to be conserved over time.
Therefore, according to this question, the law of conservation of energy is described correctly by option B.
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A Styrofoam cup holding 125 g of hot water at 1.00×102∘C cools to room temperature, 20.0 ∘. What is the change in entropy of the room? (Neglect the specific heat of the cup and any change in temperature of the room.)
The change in entropy of a system will be 6.25 kJ/K. For further explanation you can read below.
The change in entropy of a system is given by the equation ΔS = Q/T, where Q is the heat transferred and T is the temperature at which the transfer occurs. In this case, the temperature of the hot water is initially 1.00×102 ∘C and it cools to room temperature, which is 20.0 ∘C. Note that entropy is a measure of the disorder or randomness of a system, and that this calculation assumes that the heat from the hot water is completely transferred to the room, increasing its disorder. It also assumes that the specific heat of the cup and any change in temperature of the room are negligible, which is generally a good approximation for a small cup of hot water in a large room.
We can therefore calculate the change in entropy of the room as follows:
ΔS = Q/T = (125 g * 1.00×102 ∘C - 125 g * 20.0 ∘C) / (20.0 ∘C)
= 6.25 kJ/K
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A person exerts a constant force of 45 N directed at angle θ to the horizontal on a crate of weight 100 N to pull it from one end of a room to another, a distance of 4.0 m. Given that the vertical component of the force is 12 N, calculate the work done by the person on the crate.
Answer:
45 newtons
Explanation:
A person exerts a force of 45 N at an angle θ then the work done by the person on the crate will be 173.48 J.
What is Work?
Work is a physics term used to describe the transfer of energy that takes place when an object changes above a distance because of an external force, at least some of which is given in the vector of the dislocation. The element of the force acting all along the path multiplied by the length of the path can be used to calculate work if the force is constant.
Mathematically, this idea is expressed as W = fd, where W is the effort and f is the force multiplied by d, the distance. Work is completed whenever the force is applied at an angle of with regard to the displacement.
As per the given information in the question,
Force, F = 45 N
Weight, w = 100 N
Distance, d = 4 m
The Vertical component of force, f(y) = 12 N.
To determine the force's component parts in this situation, we need formulae.
The horizontal component, F(x) = F cos θ
The vertical component, F(y) = 12 N
As the force F is given as 45 N, then,
45 sin θ = 12
sin θ = 12/45
θ = 15.466
Now,
F(x) = F cos θ
= 45 cos (15.466)
F(x) = 43.37 N
The work required to move the crate 4 meters is determined by this horizontal component:
W = F(x) × D
W = 43.37 × 4
W = 173.48 J.
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What type of metamorphosis do hive beetles undergo?
a. complete
b. incomplete
c. mesocomplete
The small hive beetles, like moths and bees, undergo complete metamorphosis.
The beetles' life cycle starts with eggs, which are laid in the hive and hatch into larvae within 2 to 3 days.
Ten to 16 days later, the larvae crawl from the hive and drop to the ground outside, where they burrow into the soil and pupate.
In about 3 to 4 weeks, they emerge as adult beetles. and re-enter the hive a week later.
This process may repeat itself several times. a year, especially during the warmth months'
An animal's physical development, including birth or hatching, is governed by a biological process called metamorphosis. This process involves a noticeable and rather rapid change in the animal's body structure as a result of cell proliferation and differentiation. Insects, fish, amphibians, mollusks, crustaceans, cnidarians, echinoderms, and tunicates are among the creatures that go through metamorphosis, which is frequently accompanied by a change in diet or behaviour. Animals can be categorised into species that undergo holometaboly (full metamorphosis), hemimetaboly (incomplete metamorphosis), or no metamorphosis ("ametaboly").
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You are standing in front of a concave mirror. Your image appears enlarged and upside down. Where are you standing relative to the mirror?
between the focus & the centre of curvature of the mirror
in a car lift used in a service station, compressed air exerts a force on a small piston of circular cross-section having a radius of 3.17 cm. this pressure is transmitted by a liquid to a second piston of radius 16.2 cm. what force must the compressed air exert in order to lift a car weighing
The compressed air must exert a force of 508.47N on the small piston in order to lift the car weighing 13300 N and the pressure exerted is 16.14x10^4Pa.
Given circular cross-section having a radius (r1) = 3.17cm = 3.17x10-2m
The pressure is transmitted by a liquid to a second piston of radius (r2) = 16.2cm = 16.2x10-2m
Force exerted on car (F2) = 13300N
Here pascals principle is applied.
We know that Pressure (P) = force/area
P1 = P2 then F1/A1 = F2/A2
Area of the circle = π*r²
F1/π*(3.17x10-2)^2 = 13300/π*(16.2x10-2)^2
F1 = 508.47N
(b) The air pressure will produce a force of that magnitude P =F/A
P = F1/A1 = 508.47/ π*(3.17x10-2)^2 = 16.14x10^4Pa
(c) As a result, the work is equal in both pistons. The little piston displaces a small volume of liquid, which is dispersed across the large piston in a thin layer.
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complete question: In a car lift used in a service station, compressed air exerts a force on a small piston of circular cross section having a radius of r1 = 3.17 cm. This pressure is transmitted by an incompressible liquid to a second piston of radius 16.2 cm. (a) What force must the compressed air exert on the small piston in order to lift a car weighing 13,300 N? Neglect the weights of the pistons. (b) What air pressure will produce a force of that magnitude? (c) Show that the work done by the input and output pistons is the same.
what is the apparent weight of a 0.80 g drop of water
Therefore, the apparent weight of 1.1 g of water is 3.57 N.
What is apparent weight?
According to physics, an object's perceived weight is a characteristic that describes how heavy it is. When the force of gravity acting on an item is not counterbalanced by a force of equal but opposite normality, the apparent weight of the object will differ from the actual weight of the thing.
given
Speed of rotation, N = 1300 rpm
diameter, d = 35 cm, so that
radius, r = 17.5 cm = 0.175 m
mass of drop = 0.80 g = 0.80 *10^-3 kg
Angular speed of water, ω = 2πN/60
ω = 2π*1300/60
ω = 8169.2/60
ω = 136.15 rad/s
apparent weight will be gotten by
W(a) = mω²r
W(a) = 0.80*10^-3 * 136.15² * 0.175
W(a) = 0.80*10^-3 * 18536.82 * 0.175
W(a) = 3.57 N
Therefore, the apparent weight of 1.1 g of water is 3.57 N.
Complete question: The spin cycle of a clothes washer extracts the water in clothing by greatly increasing the water's apparent weight so that it is efficiently squeezed through the clothes and out the holes in the drum. In a top loader's spin cycle, the 35-cm-diameter drum spins at 1300 rpm around a vertical axis.
What is the apparent weight of a 0.80 g drop of water?
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a planet that has mass 10 jupiter masses is in a close orbit around its star. the system is estimated to be 2 billion years old. which method of exoplanet detection is best suited to finding it, if any?
The method of exoplanet detection is best suited to finding are :-
Radial Velocity. Watching for Wobble. 1020 planets discovered.Transit. Searching for Shadows. 3938 planets discovered.Direct Imaging. Taking Pictures. 62 planets discovered.Gravitational Microlensing. Light in a Gravity Lens. 145 planets discovered.Astrometry. Minuscule Movements. 2 planets discovered.A planet is a large, rounded astronomical body this is neither a star nor its remnant. The first-class available idea of planet formation is the nebular hypothesis, which posits that an interstellar cloud collapses out of a nebula to create a young protostar orbited via a protoplanetary disk. Planets grow on this disk with the aid of the slow accumulation of cloth driven via gravity, a technique known as accretion. The sun machine has at least eight planets: the terrestrial planets Mercury, Venus, Earth and Mars, and the large planets Jupiter, Saturn, Uranus and Neptune.
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Answer in complete sentences. You are heating up soup in a pan on the stove, while stirring the soup with a metal spoon. Although the spoon only touches the soup, and never touches the bottom of the pan, it becomes hot and burns your hand. Describe how the heat is transferred from the hot burner on the stove to the metal spoon. Be specific and give as much detail as you can. (6 points)
The heat is convicted through the soup. The soup heats up as the spoon is in the soup making the spoon hot. its like saying pouring hot water into a cup and its hot on your hand its convecting through the glass and heating up
A Banked circular highway curve is designed for traffic moving at 60km/h. The radius of the curve is 200m. Traffic is moving along the highway at 40 km/hr on a rainy day. What is the minimum coefficient of friction between tired and road that will allow cars to take the turn without sliding off the road? (Assume the cars do not have negative lift; curious to know what is negative lift?, a wiki search on car handling will help.)
The Coefficient of friction u = 0.078
Calculate the following?
Radius of curvature r = 200 m
First we need banking angle at v = 60 Km/h = 60(1000 m/3600 s) = 16.66 m/s
At this speed (for which the road is designed)
Coefficient of friction v^2/rg = sin A
sin A = (16.66)^2/(200*9.8)
sin A = 0.1416
A = 8.141 degrees
For no slipping at the banking angle at the lower Speed v = 40 Km/h = 40 (1000 m/3600 s) =11.11 m/s ,
mv^2/r = mg sin A - u mg cos A
0.617 = (9.8*0.1416) - u (0.9899*9.8)
0.617 = 1.387 - u (9.7)
9.78 u = 0.77
∴ Coefficient of friction u = 0.078
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you fly from seattle, washington to salt lake city, utah and then from salt lake city to portland, oregon. describe the meaning of adding the two velocity vectors together for each trip. explain how you could estimate the total time the entire trip would take using the vectors.
One simple resultant vector is produced when two vectors are added. Depending on the quantity that the resultant vector represents, we can infer its meaning.
What is the best way to merge two velocity vectors?In order to directly sum the two velocities, we can use the formulae v tot = v x 2 + v y 2 v tot = v x 2 + v y 2 and = tan 1 (v y / v x) = tan 1 (v y / v x).
Adding vectors produces what outcome?A resulting displacement results from the addition of displacement vectors. The only requirement is that the two vectors must be of the same vector quantity in order to add them. There will be a consequent velocity if two additional velocity vectors are added. There is a resultant force when two vectors are added.
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suppose that a polar bear's foot has a luminosity of . what is the bolometric absolute magnitude of the bear's foot? what is the bolometric apparent magnitude of the foot at a luminosity distance of ? if a bolometer can detect the bear's foot at a maximum luminosity distance of , what is the maximum luminosity distance at which it could detect the sun? what is the maximum luminosity distance at which it could detect a supernova with ?
The bolometric absolute magnitude of the bear's foot is M = 68.70.
Solution:
Bear's foot has a luminosity of 2 = 10 Watt
We have to find the bolometric absolute magnitude foot of the bear
we know the bolo metric absolute magnitude formula
M = -2.5 log10 (2x) —(1) will but 78.7 x 3.83×1026 20 гое 2x = Lx → refer luminosity value of L and Lx in the equation.... (i)
M = -2.5 log10 ( 10/ 78.7 x 3.83 x 10²⁶
M = -2.5 log 10 (10/301.42 x 10²⁶)
M = -2.5 -27.48
M = 68.70
We propose the radiation temperature T as a measure of circumstellar eclipses and the evolutionary development of young stellar bodies. T is the temperature of a blackbody with the same mean frequency as the observed continuum spectrum. A bolometer is an instrument used to measure radiation by measuring the temperature rise of a blackened metal strip in one of the arms of a resistance bridge.
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Label the parts of the transverse wave. amplitude: crest : trough: wavelength:
A transverse wave oscillates perpendicular to the direction of energy transfer. A = Crest, B = trough, C = Amplitude, and D = Wavelength.
What is a transverse wave?
In physics, A wave whose oscillations are perpendicular to the direction of the wave's advance is called a transverse wave. This is the difference from a longitudinal wave which travels in the direction of its oscillations. Water waves are samples of a transverse wave. A simple example is given by the waves that can be built on a horizontal length of the string by anchoring one end and moving the other end up and down.
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why weren't horizontally opposed engines used in combat fighters during wwii? wouldn't they solve problems of visibility, center of gravity, etc.? i 'm not referring to light aircraft like the piper cub.
Superior forward visibility compared to radial or V-type engines is a benefit of horizontally opposed engines. For a variety of reasons, including fewer cylinders for equivalent power and smooth operation, opposed engines have today supplanted all previous forms of piston engines.
What World War II fighter plane was the most successful?The American F4U-4 Corsair carrier-based fighter-bomber, created and manufactured by Chance Vought, was the most effective fighter of World War II. More than 12,500 aircraft were produced between 1942 and 1953. The fighter had an extremely lethal arsenal and outstanding mobility.
What drawback does an opposing engine have?The requirement to gear the power from the two opposing pistons together was the biggest disadvantage. Compared to traditional piston engines, these extra weight and complexity
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which model of the universe is currently the most accepted in light of the discovery of dark energy?
An accelerating universe is currently the most accepted in light of the discovery of dark energy.
A hypothesized energy known as "dark energy" acts in opposition to gravity by exerting a repellent, negative pressure. It has been proposed to explain the observable characteristics of far-off type Ia supernovae, which reveal the universe is expanding at a faster rate than usual.
Saul Perlmutter, Brian Schmidt, and Adam Riess are the recipients of the 2011 Nobel Prize in Physics. They made the stunning conclusion that the universe's expansion is speeding up as a result of their observations of far-off stars exploding.
The distance measurements utilizing type Ia supernovae (SN Ia) for the galaxies at high redshift provide the most direct and compelling evidence for the expanding cosmos powered by dark energy.
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a laser beam passing from medium 1 to medium 2 is refracted as shown. which is true?
The laser beam when passes from medium 1 to medium 2 shows the relation n1 > n2 that is option B is correct.
The laser beam in the attached figure when passing from medium 1 to medium 2 bends away from the normal. This means that the speed of the light beam is increased when it passes from medium 1 to medium 2. This means that the light beam is travelling from a slightly denser medium to slightly rarer medium as it is the property of light beam when it travels from denser to rarer medium it bends away from the normal. The refractive index of denser medium is more than that of the refractive index of rarer medium. So, we can conclude that n1 > n2.
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Complete Question:
A laser beam passing from medium 1 to medium 2 is refracted as shown. which is true?
a) n1 < n2
b) n1 > n2
c) there is not enough information to compare n1 and n2
The SI units for position, velocity, and acceleration are, respectively: Question 11 options: m, m/s, m/s^2 kg, m/s, m^2/s m, m/s, m^2/s kg, m/s, m/s^
The SI units for position, velocity, and acceleration are, respectively: m, m/s, m/s^2
Position is measured in meters (m). Velocity is measured in meters per second (m/s). Acceleration is measured in meters per second squared (m/s^2).
Velocity:
Velocity is the directional velocity of a moving object as an indicator of the rate of change of position, observed from a certain frame of reference and measured at a certain time reference (eg 60 km/h northward). Velocity is a fundamental concept in kinematics, a branch of classical mechanics that describes the motion of bodies.
Acceleration:
Acceleration is the rate of change of an object's velocity with respect to time. Acceleration is a vector quantity (as long as it has magnitude and direction). The direction of an object's acceleration is given by the direction of the net force acting on that object. The magnitude of the object's acceleration described by Newton's second law.
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a ball is thrown upward from the top of a 50 meter high building with an initial speed of 25 m/s. a. how much time does it take to reach the ground?
The time taken by the ball to fall on the ground is 2.55 seconds
The height of the building = 50 m
The initial speed = 25 m/s
The time taken to reach the ground can be found using the formula
v = u + at
where u is the initial speed
a is the acceleration
t is the time taken
At the highest point, the speed is zero which is v = 0 and the acceleration is due to gravity which is in the opposite direction of the movement of the ball. Thus,
0 = u - gt
Let us rearrange it,
t = u/g
Let us substitute the known values in the above equation, we get
t = 25 / 9.8
= 2.55 seconds
Therefore, the time taken is 2.55 seconds.
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This type of energy utilizes heat that is stored beneath Earth's surface to heat water and produce steam. What is it?
The heat generated at great depths in the Earth's core is known as geothermal energy. Geothermal energy may be used to generate both heat and power.
What kind of energy is used to create the heat under the earth's surface?The heat that occurs within the Earth is known as geothermal energy. The Greek words "geo" (earth) and "therme" are where the term "geothermal" originates (heat). Given that heat is continually produced underground, geothermal energy is a renewable energy source. The deep hot water reservoirs of the Earth are the source of geothermal energy. As this hot water rises to the surface, geysers or hot springs spontaneously appear.
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