The main symmetry types are as follows. When all objects are mirrored about a central axis, reflection symmetry—also known as bilateral symmetry—occurs.
What do symmetrical balance examples look like?The symmetrical equilibrium found in nature is well represented by the human face. You would have two sides of your face with the exact identical pattern if you drew a line down the middle of it.
What does asymmetry represent in terms of art?Asymmetrical balance is when a design appears balanced while having contrasting visual representations on either side. A design must have differential visual weight on either side in order to be deemed asymmetrical, yet those unequal visuals must balance one another.
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reservoirs used to produce electricity, canals used for transportation, and lakes used for recreation are examples of water with uses.
Types of water with "Multiple" applications include reservoirs that generate power, canals that are used for transportation, as well as lakes that are utilized for recreation.
Explain the term reservoirs?A reservoir is a man-made lake used to store water. The majority of reservoirs are created by building dams across rivers.
A naturally lake whose outflow has been blocked to regulate the water level can likewise be converted into a reservoir.Flood risk control is reservoirs' most important function. Reservoirs store water during periods of heavy rain, lowering the risk of flooding, then gradually release the water over the ensuing weeks and months.Using the potential energy of water to produce electricity, a hydroelectric reservoir is a sizable gathering of water behind the same hydroelectric dam. The dam holds back some of this water, and when energy is needed, a little amount is permitted to flow through the base of the dam.Thus, types of water with "Multiple" applications include reservoirs that generate power, canals that are used for transportation, as well as lakes that are utilized for recreation.
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The complete question is-
reservoirs used to produce electricity, canals used for transportation, and lakes used for recreation are examples of water with ______ uses.
will the particle move to the right (in the positive x -direction) or to the left (in the negative x -direction), and why?
Yes, the particle moves in the positive x-direction (to the right) or the negative x-direction (to the left) due to the forces of attraction and repulsion.
When the particle's velocity is positive, it is travelling to the right. When the velocity is negative, it also moves to the left. A body with a higher mass may have a lower moment of inertia than a body with a lower mass. This relies on the mass distribution and axis with respect to which we are computing the moment of inertia. In real-world situations, we frequently avoid dealing with particles.
The time it takes for a constant force to bring a particle to rest, on the other hand, is represented by its momentum.
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suppose a guitar string has a resonant frequency of 329.6 hz and a q of 632. after you pluck the string, how many periods of oscillation would it take for the energy of the vibrating string to decay by a factor of e? how many seconds will that take?
It would take 100.6 periods of oscillations for the energy of vibrating string to decay in 0.305 seconds.
Resonance is defined as a system's tendency to vibrate with increased amplitude when frequencies are excited. The maximum frequency at which the amplitude is relatively maximum is referred to as the resonance frequency or resonant frequency. The sharpness of the resonance is defined by the Q factor.
Given,
resonant frequency, f = 329.6 Hz
Quality factor , Q = 632
We know that that quality factor is equal to [tex]2\pi[/tex] .i.e [tex]Q=2\pi[/tex]
then, for 2 periods of oscillations , the energy of vibrating string to decay by factor of 'e' be
[tex]Q=2\pi n\\\\632=2\pi n\\\\n=\frac{632}{2\pi}\\\\n=100.63[/tex]
then, the time elapsed can be determined by,
[tex]f=\frac{n}{T}\\\\329.6=\frac{100.63}{T}\\\\T=\frac{100.63}{329.6}=0.305s[/tex]
Thus, the energy of a vibrating string would decay in 0.305 seconds after 100.6 oscillations.
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you have an electrical device with a long wire in it. the wire is 20 gauge, meaning its diameter is about 1 mm. currently, the wire's resistance is about 0.038 ohms. with a 0.8 a current running through it, how much power will the wire use? p
When the wire's resistance is about 0.038 ohms and a 0.8 a current running through it, then power that the wire will use is 0.024 W.
How is power defined?We define power as the rate of doing work or can be said that it is the work done in unit time. The SI unit of power is Watt which can also be written as joules per second (J/s). Sometimes, power of motor vehicles and other machines is given in Horsepower (hp), which is approximately equal to 745.7 watts.
P= V *I
Given I= 0.8A and R= 0.038 ohms
V = IR
= 0.8* 0.038
= 0.0304 v
Power= V *I
= 0.0304 * 0.8
Power = 0.024 W
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consider the above graphs of the hip sagittal angle during the stance phase of running and answer the following questions a. what is the angular displacement for the hip joint from on to off? b. what is the largest angular velocity of the hip joint and is it a flexion or extension velocity? c. what is the largest extension torque of the hip and where in the movement does this occur? d. what is the largest flexion torque of the hip and where in the movement does this occur? e. at the peak extension torque, what muscles produce this torque and is it a concentric or eccentric contraction? f. at the peak flexion torque, what muscles produce this torque and is it a concentric or eccentric contraction?
a. The hip joint's angular displacement from on to off is 49.1°.
b. The hip joint's maximum angular velocity is 55.4°/s, and it is a flexion velocity.
c. The muscles gluteus medius, gluteus maximus, and semitendinosus provide the maximum extension torque of the hip at 50% of the movement. It is a concentric contraction.
d. The muscle known as biceps femoris long head produces the maximum flexion torque of the hip at the 75% mark of the exercise. It's an eccentric contraction.
e. The gluteus medius, gluteus maximus, and semitendinosus all contribute to the peak extension torque, which is a concentric contraction.
F. Eccentric contraction of the biceps femoris long head causes the maximum flexion torque.
What is angular velocity?
Angular velocity is the rate of change in the angle between two bodies or the pace at which an item revolves or rotates around an axis. This displacement in the illustration is shown as the angle between a line on one body and a line on the other.
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how did the discoveries of copernicus and other astronomers affect the way people viewed the universe? a. their experiments proved that the ancient classical astronomers had been correct about how the universe functioned. b. their observations supported the ptolemaic view of the universe. c. their discoveries reinforced traditional church teachings on the relationship between earth and the stars and other planets. d. their observations proved that the universe was heliocentric.
The discoveries of Copernicus and other astronomers proved that universe was heliocentric which affected the way people viewed the universe.
Thus, the correct answer is D.
What is the heliocentric system?The word "helios" in Greek meаns "sun." Heliocentric meаns thаt the sun is аt the center. А heliocentric system is one in which the plаnets revolve аround а fixed sun. This theory wаs first proposed by Nicolаus Copernicus. Copernicus wаs а Polish аstronomer. He first published the heliocentric system in his book: De revolutionibus orbium coelestium, "On the revolutions of the heаvenly bodies," which аppeаred in 1543.
After 1,400 yeаrs, Copernicus wаs the first to propose а theory which differed from Ptolemy's geocentric system, аccording to which the eаrth is аt rest in the center with the rest of the plаnets revolving аround it. The clаim thаt аll plаnets revolve аround the sun hаd been rаised in аncient times, but Copernicus wаs the first to succeed in describing the movements of the plаnets using аn аstronomicаl theory which plаced the sun аt the center.
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two streams merge to form a river. one stream has a width of 8.2 m, depth of 3.4 m, and current speed of 2.3 m/s. the other stream is 6.8 m wide and 3.2 m deep, and flows at 2.6 m/s. if the river has width 10.5 m and speed 2.9 m/s, what is its depth?
The depth of the river is calculated to be 3.7 m
Given,
Width of stream 1 = 8.2 m
Depth = 3.4 m
Current speed = 2.3 m/s
Width of second stream = 6.8 m
Depth = 3.2 m
Current speed = 2.6 m/s
Width of the river = 10.5 m
Current of river 3 = 2.9 m/s
For stream 1
h₁ = 3.4 m ,b₁= 8.2 m ,v₁= 2.3 m/s
For stream 2
h₂ = 3.2m ,b₂= 6.8 m , v₂=2.6 m/s
For river 3
b= 10.5 m ,v= 2.9 m/s
Lets take depth of the river = h
Total discharge should be constant.
We know that discharge
Q= A v
A=Area ,v=velocity
Q₁+Q₂ = Q
By putting the values
h₁b₁v₁ + h₂ b₂ v₂ = b h v
3.4 x 8.2 x 2.3 + 3.2 x 6.8 x 2.6 = 10.5 x 2.9 x h
h= 3.78 m
Therefore, the depth of the river is 3.78 m
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A box is released from rest and slides down a ramp in a
closed system. Even though the box speeds up, its
What best explains why the box's final kinetic energy is
kinetic energy at the bottom of the ramp is less than the
less than its initial potential energy?
potential energy that it had at the top of the ramp.
O In a closed system, kinetic energy is always less IS
than potential energy.
Some potential energr-was converted into thermal
energy due to friction.
• The acceleration due to gravity became smaller as
the box slid down the ramp.
In
closed system, total energy is constantly being
lost to outside objects.
Some potential energy was converted into thermal energy due to friction. Option C
What is mechanical energy?We know that the term mechanical energy has to do with the energy that possessed by a body owing to the fact that it is in motion or the fact that it is stationary. If the energy is possessed by the object because the object is moving, that means that the energy is the kinetic energy. If the energy is due to the position of the object, we say that the energy is potential.
Now we know that in a closed system, the total mechanical energy of the system must be a constant. The implication of this is that the potential energy of the object at the top of the ramp must be equal to the kinetic energy of the object at the bottom of the ramp.
However, the existence of friction causes some of the energy of the object to be lost as heat as it is descending down the ramp.
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a plane flies horizontally at an altitude of 5 km and passes directly over a tracking telescope on the ground. when the angle of elevation is ?y3, this angle is decreasing at a rate of ?y6 radymin. how fast is the plane traveling at that time?
When a plane flies horizontally at an altitude of 5 km and passes directly over tracking telescope on the ground, then the plane is traveling at the speed of 8.69 km/min.
What is angle of elevation?The angle of elevation is widely used for height and distance in trigonometry. It is defined as the angle between horizontal plane and oblique line from the observer's eye to any object above his eye.
tan(θ) = opposite / adjacent
tan(θ) = y/x
x tan(θ) = y
x = y/tan(θ)
x = 5/tan( π/3)
dx/dt * tan(θ) + x * sec²(θ) * dθ/dt = d y /dt
As altitude remains the same, d y/dt = 0
dx/dt * tan(π/3) + 3/tan(π/3) * sec²(π/6) * -π/6 = 0
dx/dt = [5/tan(π/3) * sec²(π/3) * π/6} / tan(π/3)]
= 5/0.018* 3413.6 * 0.52/ 0.018
= 8.69 km/min
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Note: The question given on the portal is incomplete. Here is the complete question.
Question: A plane flies horizontally at an altitude of 3 km and passes directly over a tracking telescope on the ground. when the angle of elevation is π/6, this angle is decreasing at a rate of π/4 rad/min. how fast is the plane traveling at that time?
suppose that earth retained its present mass but was somehow compressed to one-third its present radius. the acceleration due to gravity, at the surface of this new, compact planet would be
The acceleration due to gravity at the surface of the new, compact planet would be three times greater than it is on Earth.
This is because gravity is inversely proportional to the square of the radius; as the radius is reduced to one-third of its original value, the acceleration due to gravity must increase by a factor of nine (3 squared).
Gravity is inversely proportional to the square of the radius because the force of gravity decreases as the distance between two objects increases. The force of gravity between two objects is inversely proportional to the square of the distance between them. As the radius increases, the distance between two objects increases, and the force of gravity between them decreases, resulting in a decrease in the gravitational force.
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at nigeria falls. if 505 kg of water fall a distance of 50 m what is the increase in the internal energy of the water at the bottom of the falls? assume all initial potential energy goes into increasing the waters internal energy and that the kinetic energy is zero
help pleaseee
The increase in the internal energy of the water at the bottom of the falls is 247,450 J.
What is the potential energy of a body at a given height above the ground?The potential energy of a body at a given height above the ground is given as the energy that a body possesses due to the height it is above the ground.
Potential energy is given mathematically as, PE = m * g * h
where;
PE is equal to the potential energy of the bodym is the mass of the bodyg is the acceleration due to gravity h is the height of the body above the groundFor the given mass of water, the increase in the internal energy of the body is calculated as follows:
Change in internal energy = Potential energy
Change in internal energy = 505 * 9.8 * 50
Change in internal energy = 247,450 J
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you add equal amounts of heat to two identical cylinders containing equal amounts of the same ideal gas. cylinder a is allowed to expand, while cylinder b is not. Part A How do the temperature changes of the two cylinders compare?
By ideal gas theory, cylinder b has the higher temperature do the temperature changes of the two cylinders compare.
What is an ideal gas explain?The phrase "ideal gas" describes a fictitious gas made up of molecules that adhere to the following principles: No attraction or repellence exists between the molecules of ideal gases. The sole action between molecules of an ideal gas would be an energetic collision when they collided or an athletic collision with the container walls.
Briefing:To answer this issue, we must be familiar with the ideal gas theory. The ideal gas is depicted by
P . V = n . R . T
where R is the ideal gas constant, T is the temperature, n is the number of molecules, P is the pressure, V is the volume, and.
We can infer from the given query that
Pa = Pb = P
na = 3nb
Find the cylinder's temperature in a
P . V = n . R . Ta
Ta = P . V /( na . R )
Substitute na
Ta = P . V /( (3nb) . R )
Ta = (1/3) x (P . V /( (nb . R ))
Find the temperature of the cylinder b
P . V = n . R . Tb
Tb = P . V /( nb . R )
The temperature in cylinder an is three times lower than that in cylinder b.
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you have a galaxy with a recession velocity of 17,500 km/s. if hubble's constant is 70 km/s/mpc, what would be the distance to this galaxy?
The distance to this galaxy with a recession velocity of 17,500 km/s and hubble's constant is 70 km/s/mpc is 1225000 km
speed=distance/constant
distance=speed×constant
distance=17500×70
distance=1225000 km
Distance is the length between two points or things, and it is directionless. Since distance is a scalar property, it only takes into account the total magnitude and ignores the start and finish locations. Being a scalar attribute, distance can only be positive or zero; it cannot be the opposite. Although kilometers (km) and centimeters (cm) or millimeters (mm) can also be used to express shorter distances, the meter (m) is the most common unit of measurement for distance (mm). When calculating distance, the letter D is frequently used to denote the distance traveled.
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a 1,800 kg car is parked on a road that has an elevation angle of 7?. suppose the coefficient of static friction of the kinds of rubber and asphalt involved is 0.65. which is approximately the force of static friction between the tires and the road?
A car weighing 1,800 kg is parked on a road with an elevation angle of 7, and Fn = 17526.4 N
Explain about the force?The definition of force in physics states that when an object with mass is pushed or pulled, it alters its velocity. A body's resting or moving status can be changed by an external agent known as force. It has both size and motion.
It takes force to push or pull something. Pushing, tugging, picking, hitting, lifting, running, and bending are examples of actions that involve the application of force. The movement or stopping of a body, as well as changes to an object's shape or motion, are a few examples of actions that show the usage of force.
In mechanics, a force is any action that aims to maintain, alter, or deform a body's motion.
=mgcosФ
=1,800 (9.81)cos7
=17526.4 N
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what experimental evidence would lead to the student to conclude that free fall acceleration is constant acceleration
The distance fallen is proportional to the square of the falling time.
A graph of velocity vs. time is linear.
What is acceleration?In mechanics, acceleration is the rate at which an object's velocity with respect to time changes. Vector quantities include accelerations. The direction of the net force imposed on an object determines its acceleration in relation to that force. acceleration is the rate of change in both speed and direction of velocity over time.When anything moves faster or slower in a straight line, it is said to have been accelerated. Because the direction is always shifting, motion on a circle accelerates even while the speed is constant.The equation a = v/t denotes acceleration (a), which is the change in velocity (v) over the change in time (t).The distance fallen is proportional to the square of the falling time.
A graph of velocity vs. time is linear.
The complete question is,
A student conducts an investigation into the motion of a car that accelerates from rest on a straight, level roadway. A driver operating the car causes the car to speed up from rest at time t = 0 and the student makes measurements of the distance traveled and the speed of the car every second. What experimental evidence would support the conclusion that the car's acceleration is uniform? Select two answers.
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a 5.00-m-long ladder, weighing 200 n, rests against a smooth vertical wall with its base on a horizontal rough floor, a distance of 1.20 m away from the wall. the center of mass of the ladder is 2.50 m from its base, and the coefficient of static friction between the ladder and the floor is 0.200. how far up the ladder, measured along the ladder, can a 600-n person climb before the ladder begins to slip?
When a 5.00 m-long ladder, with all weighing of 200 n, rests among a smooth vertical type of wall, then the ladder, will be measured among the the height = 0.488 m.
If θ be the angle ladder makes with the plane
cos θ = 1.2 / 5
Tan θ = 4.04
Let the height a person of weight 600 N can climb be h from the ground .
Distance from the base point where ladder touches the floor = h / tanθ
= h / 4.04
Total reaction force = total downward force
R = 200 + 600
800 N
Frictional force = μ R
= .2 x 800
= 160 N
Taking moment of force about the point on the ladder where it touches the floor and balancing them
= 200 x 1.2 x .5 + 600 x h / tanθ = μ R x 1.2 / tanθ ( reaction at the top point of ladder where it touches the wall is R₁ and R₁ =μ R )
= 200 x 1.2 x .5 + 600 x h / tanθ = 160 x 1.2 / tanθ
120 - 600 h / 4.04 = 47.52
120 - 47.52 = 600 h / 4.04
72.48= 148.51 h
h = 0.488 m
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what are ways that iron man's repulsor rays don't break newton's third law of motion.
Tony's Arc Reactor serves as the power source for the Repulsors, which are located in the palms of the armor.Originally intended to stabilize the flight of the armor and add more agility.
How is push produced by the Iron Man suit?Hydrogen is the gas utilized, and a sophisticated suit like Iron Man can easily extract it from the air by electrolysis. The water was condensed even as suit overpressurized ram air into form water, as well as the hydrogen gas is formed and sent right to the rocket boots.
What fuels Tony Stark's armor?The nuclear core which Tony Stark creates and implants in his heart to save his life also fuels all of his armor.In essence, it is a very energy-dense battery.
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Match each part of a nephron with its function. 1 Glomerulus 2 Distal tubule Bowman's capsule frenal corpuscle) 3 Permeability controlled by hormones: can absorb additional sodium and water 5 Proximal convoluted tubule Match each of the options above to the items below. Receives filtrate from the glomerulus. Permeability controlled by hormones; can absorb additional sodium and water. 1 Increases osmolarity of medulla; absorbs water. Absorbs 80% of filtrate, including water, glucose, and amino acids Help Save & E Seved (renal corpuscle 3 controlled by hormones; can absorb additional sodium and water 5 Proximal convoluted tubule Match each of the options above to the items below. Receives filtrate from the glomerulus. Permeability controlled by hormones, can absorb additional sodium and water. Increases osmolarity of medulla; absorbs water, Absorbs 80% of filtrate, including water, glucose, and amino acids. Filtration of plasma
While large proteins and cells are kept in the blood as long as the kidney filter is functioning normally, small blood molecules freely enter Bowman's space.
What is the main function of part nephron?By keeping the vital plasma proteins from the blood and ensuring selective ultrafiltration, the kidney glomerulus maintains its function. A fenestrated endothelium, GBM, and podocytes make up its three main parts, which together make up the glomerular filtration assembly.
Therefore, A glomerular filtrate is created when fluid and solutes from the blood are removed at the glomerulus in the nephron.
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Schizophrenia is associated with an excess of receptors for Select one:
O a. acetylcholine O b. dopamine O c norepinephrine O d. serotonin
The "binge-then-purge" cycle of overeating and dieting, often using vomiting, laxatives, or fasting, is characteristic of which disorder? Select one:
O Histrionic Disorder
O Body Dimorphic Disorder
O Bulimia Nervosa
O Anorexia Nervosa
Jacob began experimenting with alcohol consumption at his fraternity at Appstate. He was confused when alcohol made him energetic at first but ultimately drowsy. He asked Dr. Ludwig about it and learned that alcohol affects both of these contradictory neurotransmitters: Select one:
O Norepinephrine and Serotonin Serotonin and GABA
O Glutamate and GABA
O Seagrams and Budweiser If the neurotransmitter serotonin is abnormally low in your brain you will most likely suffer from Select one: O a. panic attacks O b. depression O c. dissociative disorders. O d. schizophrenia.
The D2 receptors were much higher in schizophrenia patients compared to control subjects, which is consistent with the idea that schizophrenia is characterized by an excess of dopamine receptors.
The right answer is "dopamine O."
Are you calmer when taking dopamine?Presynaptic (excessive release of dopamine from dopamine nerve terminals) or postsynaptic (excessive dopamine uptake) dopamine overactivity (an increase in the density of D2 receptors or an increase in postreceptor action).
What occurs when overstimulated dopamine receptors?Dopamine overproduction, or excessive dopamine concentration in some regions of the brain but insufficient dopamine in other regions, is associated with increased competitiveness, aggression, and inability to regulate one's impulses. Disorders including ADHD, binge eating, addiction, and gambling are among disorders that can result from it.
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if the ring is off center when it hits the disk how will that affect the results? think about the effect on the moment of inertia
If the ring is off-center when it hits the disk, the disk will still spin, but the moment of inertia will be affected.
The off-center location of the ring will cause the disk to be unbalanced, which will cause the moment of inertia to be lower than it would be if the ring were centered. This means that the disk will not spin as rapidly or as long as it would if the ring were centered.
This means that the rotational energy of the ring will not be distributed evenly and the result will be an unbalanced, or skewed, rotation. This will cause an inaccurate measurement of the moment of inertia, as the off-center ring will not be able to provide a true representation of the rotational energy.
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what is the total displacement of an airplane that travels 1000 km west and then travels 600 km east
The total displacement of the airplane is found to be 400 km West
First of all the airplane Travels 1000 km in the direction of west and then the airplane Travels 600 km in the direction of East.
Now if we assume the is direction to be the x-axis and the west direction to be the negative access because they both are completely opposite of each other, then we can define the total displacement has the difference between the initial position U and the final position V of the airplane which will be given by,
D = (V-U)
Now, putting all the values,
D = -1000-(-600)
D = -400km.
So we can say that the total displacement of the airplane is -400 km in the direction of West.
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a 1 046-kg satellite orbits the earth at a constant altitude of 101-km. (a) how much energy must be added to the system to move the satellite into a circular orbit with altitude 190 km? 437.36 correct: your answer is correct. mj (b) what is the change in the system's kinetic energy? 385.4 incorrect: your answer is incorrect. is the satellite moving faster or slower when it's orbit is at a higher altitude? mj (c) what is the change in the system's potential energy? 437.36 incorrect: your answer is incorrect.
Imagine that you are hovering next to a space shuttle and your buddy of equal mass
who is moving a 4 km/h with respect to the ship bumps into you. If he holds onto
you, how fast do you both move with respect to the ship?
The total momentum vectors will not change prior to or following a collision. When two objects collide at an angle from one another, their momentum will not change. Thus, the momentum of objects colliding remains constant.
What fast you both move with respect to the ship?Because momentum is dependent on mass and velocity, objects in space can have momentum. Mass is a property that does not change depending on where an object is, unlike other properties like weight.
Simply said, mass is the continuous amount of matter that makes up an item. Thus, momentum is a property of objects in space.
Therefore, Both the ship and the individual are moving at a 2 km/h rate.
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the law of reflection states that when light rays reflect off a surface the angle of incidence a. is one-half the angle of reflection. c. is twice the angle of reflection. b. equals the angle of reflection. d. equals the angle of refr
The law of reflection states that when light rays reflect off a surface the angle of incidence is equal to the angle of reflection.
The process by which light rays strike a surface and are reflected back is called light reflection.
The laws of reflection is the principle or rule that governs the phenomenon of light reflection.
The law of reflection states that a ray of light will bounce off a surface at the same angle at which it struck it when it comes into contact with it. The angle at which the light ray strikes the surface is known as the angle of incidence and the angle at which the light ray reflects from the surface is known as the angle of reflection. The law can also determine how the light beam will behave.Therefore according to the law of reflection, the angle of incidence is always equal to the angle of reflection.
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If you thrust a magnet into a closed loop of wire, the loop will
a.rotate
b.have current in it
c.both of the above
d. none of the above
If you thrust a magnet into a closed loop of wire, the loop will have current in it. So the correct option is B.
What is a magnet?A magnet is a body with a magnetism that can attract different irons that can be given naturally or artificially. Magnets can have their magnetic field continuously and this field can attract materials or repel them, this will depend on the magnetic permeability of the compound. The magnetic field of the images will be oriented towards the south pole and the north pole and each of these will be attracted by their opposites.
Not all magnets have permanent magnetism, this depends on whether they are going to be magnetized to be permanent or if they will only have temporary functionality.
By pushing a magnet in a closed circuit of wire, a magnetic field will be generated in which a current will flow in the turns of wire.
Therefore, we can confirm that the correct option is B. have current in it.
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if you hold one end of a metal nail against a piece of ice, the end in your hand soon becomes cold. which description is right? 1. temperature flows from the ice to your hand.
Right description: Your hand does not experience a flow of cold from the ice.
Does the ice's cold transfer to your hand to explain?Heat will transfer from a warmer object to a colder one if the temperatures of the two objects differ. For instance, when you hold an ice cube, heat from your warm hand is transmitted to the cold ice, melting it. Due to heat energy loss, your hand feels cold.
Why is it wrong to claim that a hot object warms a cold one?It is accurate to state that a rise in one object's thermal energy equals a decrease in the other's thermal energy, not temperature. The claim is true if the substance of the hot and warm objects is the same.
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a driver notices that her 1150-kg car slows down from 85 km/h to 65 km/h in about 6.0 s on the level when it is in neutral. approximately what power (watts and hp) is needed to keep the car travelling at a constant 75 km /h?
-2.214*10^4 W power is needed to keep the car travelling at a constant 75 km /h
From the question, we have
Mass (m)=1150kg
Initial velocity= v_0=85 km/h =23.6 m/s
Final velocity = v=65 km/h=18.06 m/s
acceleration (a)=v-v_0/t=18.06-23.6/6.0=-0.924 m/s^2
The force acting on the car is
F=ma
=(1150 kg)(-0.924 m/s^2)
=-1062.7 N
power (P)=Fv
=(-1062.7)(75(5/18))
=-2.214*10^4 W
Force:
According to physics, the force is an influence that has the power to change how an object moves. When a mass-containing object increases its velocity, such as when it travels away from rest, a force can cause it to accelerate. A push or a pull is a simple method to explain force. Since a force has both a magnitude and a direction, it is a vector quantity. It is calculated using the newton SI unit (N). The letter F is used to represent force. This can provide a clear understanding of how forces are defined because they are thought of as pushes or pulls.
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a mass on a spring oscillates back and forth and completes one cycle in 0.5 sec. its maximum displacement is 3 cm. write an equation that models this motion.
x(t) = 0.03 cos(4t) is the equation that models the motion of the mass on a spring.
When has a spring's maximum displacement for a given mass?The mass is pushed towards the equilibrium position by the force of the spring. Because the mass is shifting direction as it reaches its maximum displacement location, velocity is zero.
The equation: can be used to simulate the motion of a mass on a spring.
x(t) = A cos(2πf t)
A = 0.03 m since the highest displacement is known to be 3 cm. We also know that the oscillation's period is 0.5 seconds, hence the frequency is:
f = 1/T = 1/0.5 = 2 Hz
Substituting the values of A and f in the equation, we get:
x(t) = 0.03 cos(2π × 2 t)
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Why does the Sun emit neutrinos? Solar flares create neutrinos with magnetic fields_ Convection releases neutrinos, which random walk through the radiation zone. The Sun does not emit neutrinos Neutrinos are a by-product of fusion in the Sun's core in step of the p-p process
The Sun emit neutrinos because of the fusion in the Sun's core creates neutrinos.
Most of the neutrinos that are currently flowing through you came from the sun. Every second, a hundred billion solar neutrinos travel through our fingernail.
Nuclear fusion occurs in the sun, where it results in the creation of neutrinos. Protons, the nucleus of the most basic element, hydrogen, combine during fusion to create helium, a heavier element.
As a result, neutrinos and energy are released, which will eventually manifest on Earth as light and heat.
These solar neutrinos represent an overall energy emission from the Sun of about 1%. Every second, the Sun emits 1038 neutrinos, each carrying 4 1024 W of electricity.
The sun's core can also be directly understood through the use of solar neutrinos. Unexpectedly, neutrinos generated in the sun's core reach to
Earth before light from the sun (formed in the same reaction), something we would not expect. This isn't because neutrinos can move more quickly than light since they can't.
Neutrinos encounter with matter so infrequently that they are able to immediately depart the sun's dense core, whereas photons (the light particles) bounce around before breaking free.
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the direction of the force of sliding friction is always select one to that of velocity of the object and is select one static friction.
The direction of the force of sliding friction is always that of velocity of the object.
What is Static friction?Moving against the surface's normal, the force of sliding friction acts in a direct proportion to the weight.
Sliding or kinetic friction is the resistance to the actual relative sliding motion between two surfaces in contact.Let's start by learning about frictional forces from a basic understanding. If a metal block is on a table, it might not move in response to a weak force.
The metal block begins to move as the force is gradually increased.The resistive force provided by the metal block in its static form is the same as the controlling value of the force at which the metal block begins to move.Static Friction is the name given to this resistive force. The metal block starts to budge as the experiment continues and the force is increased.Moving against the surface's normal, the force of sliding friction acts in a direct proportion to the weight. In particular, if the surface on which the body slides is horizontal, the normal force will be equal to the object's weight.
Thus, F = u tanα
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