When light passes through the first filter then it will also pass through the second filter. All of the light will pass through both filters.
Polarization:
Polarization is a property applied to transverse waves that specify the geometrical orientation of the oscillations. In a transverse wave, the direction of the oscillation is perpendicular to the direction of motion of the wave.
When the axes of the first and second filters are aligned (parallel), then all of the polarized light passed by the first filter is also passed by the second. If the second polarizing filter is rotated, only the component of the light parallel to the second filter's axis is passed.
Therefore all the light will pass through both filters.
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a 5kg cat is lifted 2 meters into the air. how much gpe does it gain?
Answer:
100
Explanation:
PE=mgh=5×10×2=100Ja proton moves at constant velocity in the y direction, through a region in which there is an electric field and a magnetic field. the electric field is in the x direction, and has magnitude 400 v/m. the magnetic field is in the -z direction, and has magnitude 0.65 t.what is the magnitude of the net force on the proton?
The magnitude of the net force on the proton is 0.
What happens when the net force is zero?An object with zero net force will either remain stationary if initially stationary or maintain a constant velocity.
Fₙ = F₁ - F₂
Fₙ = Net force
F₁ and F₂ are applied forces
Now, F = ma
0 = ma
a = 0
Since acceleration is zero this implies that the object is moving with a constant velocity.
For the given case,
The proton is moving with a constant velocity along the y direction, which means the acceleration is zero. So, the net force is:
Fₙ = ma
Fₙ = m × 0
Fₙ = 0
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5) what is the average momentum of an avalanche that moves a 40-cm-thick layer of snow over an area of 100 m by 500 m over a distance of 1 km down a hill in 5.5 s? assume a density of 350 kg/m3 for the snow.
The average momentum of the avalanche was found to be 1.3×10^ 9 kg·m/s
what is momentum?
Momentum is the pace at which a security's price accelerates—that is, the rate at which the price changes. Momentum trading is a method that uses momentum to enter a trend while it is gaining traction.
Simply expressed, momentum is the tendency of a price trend to continue growing or dropping for a set period of time, taking into consideration both price and volume data. Momentum is commonly quantified using an oscillator in technical analysis and used to help detect trends.
Momentum is the quantity of motion of an item. If you know the object's velocity and mass, you can calculate its momentum. It will be simple once you understand the formula.
The average momentum of the above problem was 1.3 x 10^9Kg.m/s
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What is the direction of acceleration at all points in the projectile's path?
what is the typical power radiated by an ils localizer? what is the potential problem with an ils localizer assigned to 108.1 mhz and a nearby fm broadcast station assigned to 107.7 mhz (hint: what is the typical power radiated by fm radio stations)?
The transmitters operate between 190 and 535 kHz, have a range of at least 15 miles, and have a power of less than 25 watts.
A localizer's sensitivity range.The localizer course is typically 5°, which is fairly narrow. High needle sensitivity follows from this. When the airplane is 2.5° to either side of the centerline with this course width, a full-scale deviation is visible. This sensitivity enables precise alignment to the runway for landings.
Operating between the frequencies of 108.10 MHz and 111.95 MHz, the localizer transmitter uses one of the 40 ILS channels. Signals give the pilot direction to the middle of the runway.
An instrument landing system is a precise runway approach device that uses two radio beams to give pilots horizontal and vertical guidance as they approach the landing. The glideslope (GS) defines the proper vertical descent profile, while the localizer (LOC) offers azimuth guidance.
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a rigid , massless rod of length l, has a point paricle of mass m located at one of its endpoints. the system can freely rotate about a pivot point located at another end where gravity is considered. find the hamiltonian
The Hamiltonian of massless rod which has a point paricle at one of its ends, is Acos(ω0 t) + Bsin(ω0 t).
How to find Hamiltonian ?The Hamiltonian of a system in quantum mechanics is an operator that corresponds to the system's total energy, which includes both kinetic energy and potential energy.
It may be demonstrated that H = T + V, where T is the kinetic energy and V is the potential energy of the system—i.e., the Hamiltonian is equal to the total energy of the system—if the constraints in the issue do not depend explicitly on time.
Choose a coordinate system such that kˆ is pointing upwards
then the angular acceleration is given by
α = d^2 *θ /dt^2 * k
The torque about the center of mass is given in the statement of the problem as a restoring torque, therefore
τcm = −bθ kˆ .
The z-component of the rotational equation of motion is
−bθ = Icm * d^2 *θ / dt^2 .
This is a simple harmonic oscillator equation with solution is
θ(t) = Acos(ω0 t) + Bsin(ω0 t)
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which method of thermal energy transfer would be fastest through a vacuum, which would be fastest through a gas, and which would be fastest through a solid?
The method of radiation is faster through a vacuum, the method of convection is faster through a gas and the method of conduction is faster through a solid.
There are three modes of heat transfer:
conduction
convection, and
radiation
Radiation:
The emission of energy as electromagnetic waves or as moving subatomic particles, especially high-energy particles causes ionization. As we know vacuum does not require any medium so radiation is the heat transfer which is faster in a vacuum.
Therefore we get that in vacuum radiation, solid conduction, and gas convection heat transfer is faster.
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If an object accelerates from rest to its final vermouth in 12.3 s what is the final velocity if it traveled 200m
the final velocity is 10.50 m/s.
calculation:
time t= 12.3 s
distance s= 200u=0
equations are, v² = u² + 2as,
s = ut + ½at²
200= 0*12.3 + 1/2*a*
a=2.77
v² = u² + 2as,
v²= 0 + 2*2.77*200
v=10.50 m/s
What is the speed in units?A particle or object's movement with respect to time is expressed vectorially as velocity. The meter per second (m/s), usually referred to as speed, is the accepted unit of velocity magnitude.
In physics, what does "velocity" mean?An object's position and speed are mostly determined by its velocity. It calculates the distance an object travels in a specific length of time. The distance an object travels in a given amount of time is its velocity.
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sae 6.8 the resolution of a microscope is limited to approximately one-half the wavelength of the light source. because of this limitation, microscopes capable of obtaining atomic-scale images use electrons instead of visible light to illuminate samples. to distinguish atoms separated by a few hundred picometers, as they are in most solids, the electron wavelength should be less than or equal to approximately 200 pm. to what speed must the electrons be accelerated to attain this wavelength?
To find the speed of electrons, known the accelerated and wavelength.
What is acceleration?
The rate of change in both speed and direction of velocity over time is defined as acceleration. 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 when the speed is constant.
What is wavelength?
A waveform signal's wavelength is defined as the separation between two identical points (adjacent crests) in adjacent cycles as the signal travels through space or along a wire. This length in wireless systems is typically expressed in meters (m), centimeters (cm), or millimeters (mm).
λ=h/p
⇒ 200pm=h/m×v
V=6.626×10^⁻³⁴/9.1×10^⁻³¹×200×10^⁻¹²
=0.00364×10^⁻³⁺¹²
=0.00364×10⁹
v⇒3.64×10⁶m/s
Therefore, the speed of the electron accelerated to 3.64×10⁶m/s attain this wavelength.
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What is the normal force on an object weighing 437N at rest on an inclined plane with an angle of 29 degrees?
Answer:408
Explanation:
Answer:
382.2 N
Explanation:
You want the normal force on an object weighing 437 N situated on an inclined plane 29° from the horizontal.
Force vectorThe vector 437 N straight down can be decomposed to vectors parallel to the plane and perpendicular to the plane. That decomposition looks like ...
(perpendicular, parallel) = 437 N · (cos(29°), sin(29°)) ≈ (382.2, 211.9) N
The normal force on the object is about 382.2 N.
two objects attract each other with a gravitational force of magnitude 1.01 10-8 n when separated by 20.1 cm. if the total mass of the two objects is 5.03 kg, what is the mass of each?
Mass of to object is 3 kg and 2 kg.
What is Gravitational force?
In mechanics, gravity, often known as gravitation, is the universal force of attraction that acts between all matter. It is by far the weakest known natural force and so has no effect on the internal properties of ordinary stuff. Due to its long reach and ubiquitous action, it influences the trajectories of bodies in the solar system and elsewhere in the universe, as well as the architecture and evolution of stars, galaxies, and the entire cosmos. The weight, or downward force of gravity, exerted by the Earth's mass on all bodies on Earth is proportional to their mass. The acceleration that freely falling objects experience is used to calculate gravity.
F =G(m1m2/r2)
m1m2 = [(1.00 X 10-8N)(20*10-2m)2]
/[6.67*10-11Nm2/kg2]
Now
m1-m2 =[(m1+m2)2-4m1m2] =[(5kg)2-4(6kg2)] =(1kg2) = 1kg 2m1 =
(m1+m2)+(m1-m2) = 5kg + 1kg =6kg
m1 = 3kg, m2 = 5kg,
and
m2 = 5kg - 3kg = 2kg
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Stan argues that momentum cannot be conserved when a collision is not a head-on collision. Rachel insists it is conserved because each body receives an impulse of equal magnitude. Rachel is correct because?.
Rachel is correct because during the collision, each body exerts an equal and opposite force on the other, the forces act at equal time intervals, and the law of momentum and vector equation represents conservation for an isolated system.
What exactly is the law of momentum?The law of momentum conservation states that within an isolated system in which two or more bodies act on each other (collision of objects), the total momentum remains constant because momentum is neither created nor destroyed, but only changed by the application of external forces as described by Newton's laws of motion. Furthermore, the law states that the force acts on both objects at the same time and that the forces between the objects are equal.
That is stated by the law of momentum conservation. The total momentum of two or more bodies acting on each other in an isolated system remains constant unless an external force is applied.
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What is the name of the object to which the electric current flows from the battery toward (and then back to)?
Answer: Electrical Conductors
Explanation: Electrical conductors allow electric current to flow easily because of the make up of their atoms. In a conductor, the outer electrons of the atom are loosely bound and can freely move through the material when an electric charge is applied. In general, the best electrical conductors are metals.
a woman stands on the edge of a cliff. she throws three identical rocks with the same speed. rock a is thrown vertically downward, rock b is thrown horizontally, and rock c is thrown vertically upward. assuming the elevation loss of the three rocks is the same (the ground at the base of the cliff is flat), which rock hits the ground with the highest speed?
The speed with which the rock A, B and C which are thrown same initial speed and same mass hit the ground is equal for all the rocks.
Let us consider the initial velocity be 1 m / s and the height of the cliff to be 10 m.
For the rock A which is thrown vertically downward,
v² = u² + 2 a s
v² = 1 + ( 2 * 9.8 * 10 )
v² = 197 m / s
v = 14 m / s
For rock B which is thrown horizontally,
vx = 1 m / s
v² = u² + 2 a s
v² = 0 + ( 2 * 9.8 * 10 )
v = 14 m / s
vy = 14 m / s
v = √ vx² + vy²
v = √ 1 + 14²
v = √ 197
v = 14 m / s
As we can see here all rocks start with same gravitational potential energy and end with same gravitational energy. So all rocks have equal velocity and kinetic energy, and so energy is conserved. So they all hit the ground with same speed.
Therefore, they all hit the ground with the same speed.
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the bucket of the backhoe and its contents have a weight of 1200 lb and a center of gravity at g. the bucket is pinned at e (figure 1).
Answer:
1200
Explanation:
A 1,286-kg car is skidding to a stop along a horizontal surface. The car decelerates from 26.9 m/s to rest in 9.36 seconds. How far did the car skid before coming to rest?
Answer:
Explanation:
Given:
M = 1 260 kg
V₀ = 26.9 m/s
V = 0 m/s
Δt = 9.36 s
___________
L - ?
1)
Vehicle acceleration:
a = (V - V₀) / Δt ) = (0 - 26.9) / 9.36 ≈ - 2.87 m/s²
2)
Braking distance of the car:
L = (V² - V₀²) / (2·a)
L = ( 0² - 26.9²) / (2·(-2.87)) ≈ 121 m
What would be the weight of an astronaut of the gravitational attraction has been reduced by 1/10 of earth's gravitational attraction?
Answer: 20
Explanation: Because if you divide the astronauts weight by 10.
an object moves in an xy - plane and has the following coordinates
The x component of the object's velocity is -8 m/s and the y component of the object's velocity at the given time is 7 m/s.
option B is the correct answer
What is the x and y components of the object's velocity?
The x and y components of the object's velocity at the given time is calculated as follows;
x = -3t³ - 5t²
y = 4t² + 3
where;'
x is the x componenty is the y componentt is the timeAt the given time, t = 1 second, the x and y components of the object's velocity is;
x = -3(1)³ - 5(1) = -8
y = 4(1)² + 3 = 7
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a block of mass m is attached to a spring and placed on an inclined plane. the spring has a spring constant k, and there is negligible friction between the block and inclined plane.the block is released from rest at the position shown in the figure above with the spring initially unstretched. what distance d does the block slide down the plane before coming momentarily to rest?
The distance travelled by the block of mass m will be l₀ + x or d which can be calculated through implementing the Conservation of energy from Work energy theorem
For l₀ + x, (from figure)
sinᶿ = h / (l₀+x) ----- equation 1
We know from conservation of energy,
Ka + Ua = Kc + Uc
Here
Ka = kinetic energy at point A
Ua = potential energy at point A
Kc = kinetic energy at point C
Uc = potential energy at point C
Since the block is at rest Ka = 0 & block comes to rest after moving Kc = 0 as well
Therefore Ua = Uc
Ua = m.g.h
Uc = ½ kx²
m.g.h = ½ kx²
h = kx²/2mg ---- equation 2
Substitute the obtained value of h i.e. equation 2 in equation 1 for calculation of distance travelled by the block on an inclined plane.
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Answer:
d = (2mg sinθ) / k
Explanation:
We can use the conservation of energy.
At the point when the block comes to rest, all of its initial potential energy mgh is converted into the potential energy stored in the spring (1/2)kx², where x is the amount by which the spring is compressed.
Using trigonometry, we can see that the height h of the incline is equal to
d sinθ
where d is the distance traveled by the block down the incline.
We know this because d represents an incline and to find the y value of an incline we use sinθ
Therefore, we can write:
mgh = (1/2)kx²
Substituting h = d sinθ and solving for d, we get:
mgd sinθ = (1/2)kd²
d = (2mgsinθ)/k
Therefore, the correct answer for the distance that the block slides down the incline before coming momentarily to rest is (2mg sinθ)/k.
I hope this helped! :)
a solid ball with a volume of 0.4 m3 is made of a material with a density of 2500 kg/m3. what is the mass of the ball?
1000 kg is the mass of the ball.
How can density be converted from volume?To find the volume of a substance, divide its mass by its density (mass/density = volume). Consistent measurement units should always be used. If the density is specified in grams per cubic centimeter, for instance, then calculate the mass in grams and provide the volume in cubic centimeters.
How can density be determined in three different ways?
From mass and volume measurements, the densities of brass and aluminum will be determined. Three different methods will be used to calculate volumes: geometrically (by measuring lengths); via water displacement; and via pycnometry.
The density calculation formula is p = m/V.
m = p*v
m = 100kg
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a longitudinal wave is observed. Exactly 6 crests are observed to move past a given point in 9.1 s. Its wavelength is 2.4 m and its frequency is 0.66 HZ. What is the speed of the wave.
The speed of the longitudinal wave is 1.584 or approximately 1.6 meters per second.
What is a longitudinal wave?Longitudinal waves are waves in which the medium's vibration is parallel to the wave's travel direction and the medium's displacement is in the same direction as the wave's propagation.
Sound waves are one example of longitudinal waves. Waves of ultrasound P-waves from earthquakes
A longitudinal wave's key features include compression, rarefaction, wavelength, amplitude, period, and frequency.
To calculate the above answer multiply wavelength by frequency to get the speed of a wave.
That is:
2.4 x 0.66
= 1.584
Where the frequency is not given beforehand, you can divide 6 crests by 9.1 seconds to determine the frequency.
Hence, the speed of the longitudinal wave is 1.584 which is approximately 1.6.
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How does the Schrödinger model differ from the Bohr model of an atom?
A) It shows a heavy, positively charged nucleus.
B) It shows electrons scattered throughout a positive material.
C) It shows electron orbitals as regions of space.
D) It shows negatively charged particles in the nucleus
The difference between the Bohr model and the Schrödinger model is that the model electron orbitals as regions of space. Option C.
What is the Bohr model?In the Bohr model, we can see that the electrons were arranged in energy levels. The energy levels are such that an electron can be promoted from a lower to a higher energy level. Each of the energy levels has a given amount of energy.
However, in the case of the Schrödinger model, we do not present the electron as resident at a particular point in space but we postulate that there is a region in space where the electron could be found.
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You throw a ball straight up with a velocity of 25 m/s. How high will it reach before it begins falling back down? How long will it take to come back down and hit you on the head? How fast will it be going?
Answer:
1. It will reach a height of 31.877m
2. 5.102 seconds
3. -11.456 m/s
Explanation:
my solar system has two types of planets: terrestrials and jovians. the solar nebula hypothesis offers what explanation for the different compositions of these two types of planets?
According to the nebular hypothesis, small terrestrial planets are formed through the process of accretion, in which dense solid particles condensed and collided with one another as a result of their mutual gravitational pull.
As opposed to this, all heavier elements condensed near the sun and formed terrestrial planets, while lighter elements moved away from the sun and formed jovian planets due to the high temperature near the sun, which only allowed heavier particles to condense there.
The solar nebular hypothesis is the explanation put forth and accepted by most scientists as to how the earth came to be. It claims that a nebular, or huge clump of dust, is where the solar system originated. The heavier materials that could resist higher temperatures formed closer to the sun as the condensation of the nebular continued. Because these minerals weren't abundant, the planets they generated weren't very big.
The Jovian planets, on the other hand, formed above the frost line and could support icy compounds. These planets' larger sizes can be attributed to the abundance of ices that formed them. The lighter hydrogen and helium elements were stripped away by solar winds, which caused their accumulation far from the sun.
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A wheel with rotational inertia I is mounted on a fixed, frictionless axle. The angular speed ω of the wheel is increased from zero to ωf in a time interval T.
What is the amount of work done by the net torque to the wheel during this time interval?
A: [tex]\frac{1}{2}l\omega_{f}^{2}[/tex]
B: [tex]l\omega_{f} T[/tex]
C: [tex]l\omega_{f} ^{2}[/tex]
D: [tex]l\omega_{f} ^{2} /T[/tex]
The wheel's average net torque over the course of interval T is Iωf/T (option-D).
Does net torque match net force?An object's rotational velocity is altered by net torque. The velocity of an object is affected by net force. When pushed, the block moves horizontally and, assuming low friction, does not rotate.
Given ,
The wheel's initial angular speed, [tex]w_{i}[/tex] = 0
Final wheel angular velocity, [tex]w_{f}[/tex] = [tex]w_{f}[/tex]
The amount of time required to increase the wheel's angular speed t = T
The wheel's angular acceleration,
α = [tex]w_{f}[/tex] - [tex]w_{i}[/tex]/T
α = [tex]w_{f}[/tex] - 0/T
α = [tex]w_{f}[/tex]/T
Newton's Second Law of Rotation states:
The moment of inertia times the angular acceleration are equal when multiple torques are acting on a rigid body about a fixed axis.
τ = Iα
An expression for angular acceleration is:
α = (ωf - ωi) / T
α = ωf/T
As an alternative to the second law:
τ = Iωf/T.
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a car is being driven at a rate of 40 ft/sec when the brakes are applied. the car decelerates at a constant rate of 16 ft/sec^2. calculate how far the car travels in the time it takes to stop. your answer: answer unit
The car travels a distance of 50ft before stopping, at a rate of 40 ft/sec when the brakes are applied. the car deceleration at a constant rate of 16 ft/sec^2.
Given , Initial speed of the coz ( Vo ) = 40 ft/ sec
Deceleration of the car (dv/dt ) = - 16 Ft/ sec^2
Final speed of the car (Vx ) = 0 Ft / sec
Let the distance travelled by the can be x at
any time t. Let u be the velocity at any time t .
Now , deceleration means rate of decrease of velocity.
So ,
dv/dt = - 16 ft / sec^2
decreasing with
Negative sign means the velocity is decreasing with time .
dv/dt = dv/dx(dx/dt)
dv/dx(dx/dt) = -16
dx/dt = v, so
v dv/dx = -16
vdv = -16 dx
Integrating both sides under the limit 40 to o
0 to x for 'x '. This gives
[tex]\int\limits^0_ a {v} \, dx = \int\limits^0_x {-16} \, dx[/tex]
Here, a=40
x=800/16
x=50ft.
The car travels a distance of 50ft
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there are two different objects of different masses. object a has a mass of 50 kgs and object b has a mass of 30kgs. which object will have more inertia and why?
after a very short time, what is the difference between the pressure-difference across the component on the left and the pressure-difference across the component on the right?
Flow doesn't depends on absolute values of P1 and P2
Flow doesn't depends on absolute values of P1 and P2 but flow depends on pressure difference between top and bottom of each sides. This conclude that whenever { P2-P4 = P1-P3 } flow will be stop.
after some time, difference in pressure across either components is
{ P(Top) - P(bottom) }
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tarzan, who weighs 688 n, swings from a cliff at the end of a vine 18 m long (fig. 8-38). from the top of the cliff to the bottom of the swing, he descends by 3.2 m. the vine will break if the force on it exceeds 950 n. (a) does the vine break? (b) if no, what is the greatest force on it during the swing? if yes, at what angle with the vertical does it break?
Tension is defined as the pulling force transmitted axially using a string, a rope, chain, or similar object, or by each end of a rod, truss member, or similar 3-D object; tension might also be expressed as the action-reaction pair of forces acting at each end of said elements.
Maximum tension:
T - mg = mv²/L
By energy conservation:
mgh = ¹/₂ mv²
v² = 2gh
Now the tension force in the vine at this position is given as:
T = mg + mv²/L
Now substitute the values in the above equation:
T = 688 N + m(2gh)/L
T = 688 + 2×3.2(688)/18
T = 932.6 N
As the force is less than the limit of 950 N so the vine didn't break.
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a motorcycle accelerates uniformly from rest and reaches a linear speed of 25.3 m/s in a time of 11.4 s. the radius of each tire is 0.259 m. what is the magnitude of the angular acceleration of each tire?
Equation (8.10) provides the following form for the angular acceleration "alpha," which is proportional to the radius "rr," and the tangential acceleration "aa."
What is the wheel's angular acceleration?A wheel's angular acceleration is alpha = 6.0t4 - 4.0t2, where alpha is measured in radians per second squared and t is measured in seconds. The wheel has an angular position of +1.0 rad and an angular velocity of +2.0 rad/s at time t = 0.
=rα \s1: The most popular units for angular acceleration are rad/s2 and rad/s. 2 . Similar to how a + or - sign designates the direction of linear acceleration in one dimension, a + or - sign designates the direction of angular acceleration along a fixed axis.
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