Answers
Answer:
w1:w2 = 16:1
Explanation:
As we know that ration of amplitude is equal to
[tex]\frac{a_1}{a_2} = \sqrt{\frac{w_1}{w_2} }[/tex]
here w1 and w2 are the widths of the slit.
[tex]\frac{I _{min}}{I_{max}} = \frac{(a_1-a_2)^2}{(a_1+a_2)^2} \\\frac{9}{25} = \frac{(1-\frac{a_2}{a_1} )^2}{(1+\frac{a_2}{a_1} )^2} \\\frac{3}{5} = \frac{(1-\frac{a_2}{a_1} )}{(1+\frac{a_2}{a_1} )}\\8 \frac{a_2}{a_1} = 2\\\frac{a_1}{a_2} = 4[/tex]
Again
[tex]\frac{a_1}{a_2} = \sqrt{\frac{w_1}{w_2} }[/tex]
[tex]4 = \sqrt{\frac{w_1}{w_2} }\\\frac{w_1}{w_2} = 16[/tex]
w1:w2 = 16:1
Related Questions
what causes lightning?
Answers
Answer:
cause by imbalances between stroms cloud and grounds , or within the cloud themselves.
Explanation:
Lightning is an electrical discharge caused by imbalances between storm clouds and the ground, or within the clouds themselves. Most lightning occurs within the clouds. ... This heat causes surrounding air to rapidly expand and vibrate, which creates the pealing thunder we hear a short time after seeing a lightning flash.
The positive and negative charges grow large enough, a giant spark lightning, occurs between the two charges within the cloud.
What is lightning?The naturally occurring electrostatic discharge with high voltage for short duration from the cloud to the ground or within the cloud. The lightning can be seen by a flash of light that could be followed by the strong sound. Lightning happens when the negative charges (electrons) in the bottom of the cloud are attracted to the positive charges (protons) in the ground or within the clouds. In the starting stages air acts as an insulator, but after the charges build up with the charges in the ground and cloud there will be the rapid form of electricity causes lightning. These lightning were in the color of bluish white.
Thus, the charges discharging naturally causes lightning.
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1.
A 50 kilogram person carries a 20 newton can to the top of a
3.0 meter high ladder and then drops it to the floor.
Calculate the potential energy of the can when it is
at the top of the ladder.
a.
[801)
b. Determine the kinetic energy of the can when it is
1.0 meter above the floor.
Answers
Answer:
Potential Energy = 147Joules
KE = 490Joules
Explanation:
1) Potential Energy = mgh
Mass m = 50kg
g = 9.8m/s^2
height h = 3.0m
Potential = 50*9.8*3
Potential Energy = 147Joules
2) KE = 1/mv^2
Get the velocity
v² = u²+2gh
v² = 0²+2(9.8)(1.0)
v² = 19.6
v = √19.6
v = 4.43m/s
KE = 1/2 * 50 *4.43²
KE = 25 * 19.6
KE = 490Joules
Hence the kinetic energy is 490Joules
(a) The potential energy of the can when it is at the top of the ladder is 1470 J.
(b) The kinetic energy of the can when it is 1.0 meter above the floor is 488.41 J.
Given data:
The mass of the person is, m = 50 kg.
The weight carried by the person is, W = 20 N.
The vertical height of ladder is, h = 3.0 m.
(a)
The energy possessed by an object by virtue of its position is called potential energy. The expression for the potential energy is given as,
[tex]PE = mgh[/tex]
here, g is the gravitational acceleration.
Solving as,
[tex]PE = 50 \times 9.8 \times 3.0\\\\PE = 1470 \;\rm J[/tex]
Thus, the potential energy of the can when it is at the top of the ladder is 1470 J.
(b)
And the kinetic energy is the energy of object by virtue of motion. And its expression is,
[tex]KE = \dfrac{1}{2} mv^{2}[/tex]
Here, v is the velocity of can.
Now, at 1 m height, its velocity is calculated as,
[tex]v^{2}=u^{2}+2gh\\\\v^{2}=0^{2}+2 \times 9.8 \times 1.0\\\\v = \sqrt{2 \times 9.8 \times 1} \\\\v=4.42 \;\rm m/s[/tex]
So, the kinetic energy is calculated as,
[tex]KE = \dfrac{1}{2} \times 50 \times (4.42)^{2}\\\\KE = 488.41 \;\rm J[/tex]
Thus, we can conclude that the kinetic energy of the can when it is 1.0 meter above the floor is 488.41 J.
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Big Ben, a large artifact in England, has a mass of 1x10^8 kilograms and the Empire State Building 1x10^9 kilograms. The distance between them is about 5,000,000 meters. What is the force exerted by Big Ben on the Empire State Building?
Answers
Answer:
The force, exerted by Big Ben on the Empire State Building is 2.66972 × 10⁻⁷ N
Explanation:
The question relates to the force of gravity experienced between two bodies
The given parameters are;
The mass of Big Ben, M₁ = 1 × 10⁸ kg
The mass of the Empire State Building, M₂ = 1 × 10⁹ kg
The distance between the two Big Ben and the Empire State Building, r = 5,000,000 meters
By Newton's Law of gravitation, we have;
[tex]F=G \times \dfrac{M_{1} \times M_{2}}{r^{2}}[/tex]
Where;
F = The force exerted by Big Ben on the Empire State Building and vice versa
G = The universal gravitational constant = 6.67430 × 10⁻¹¹ N·m²/kg²
M₁, M₂, and r are the given parameters
By plugging in the values of the parameters and the constant into the equation for Newton's Law of gravitation, we have;
[tex]F=6.67430 \times 10^{-11} \times \dfrac{1 \times 10^8 \times 1 \times 10^9}{(5,000,000)^{2}} = 2.66972 \times 10^{-7}[/tex]
The force, 'F', exerted by Big Ben on the Empire State Building is F = 2.66972 × 10⁻⁷ N.
a small bird stands on the surface of earth. which of the following is true of the gravitational force that the BIRD exerts on the earth?
A. the bird doesnt exert gravitational force on the earth
B. the bird has a smaller magnitude than the gravitational force that earth exerts on the bird.
C. the bird has a larger magnitude than the gravitational force that the earth exerts on the bird
D. it has the same magnitude as the gravitational force the earth exerts on the bird.
I'm between B and D
Answers
Answer:
I believe that B is the right one.
1. Which point(s) represent the maximum kinetic energy?
2. Which point(s) represent a zero kinetic energy?
3. Which point(s) represent the maximum potential energy?
4. Which point represents the maximum displacement on the right side?
5. If the distance from P to R takes 1 second, What is the distance from ap to Q?
Answers
1. R
2. P and Q
3. P and Q
4. Q
5. 2 seconds
Wait have a diagram to explain better. It's attached above.
Help with this please^^
Answers
1) The radiations are associated with both electric and magnetic field is called "Electromagnetic radiation".
4) IR rays, Alpha rays, Beta rays.
PLEASE IM TIMED! GIVE BRAINLIEST OF U ANSWER THESE 2 QUESTION!!
Answers
Answer:
thermaltrueExplanation:
hope this helps!
thermal,true the explanation is because the other guy said so
Two magnets are held apart. Once released, the south pole of one magnet moves toward the north pole of another magnet until the magnets collide. How does the graph reflect the changes in energy that occur?
(1 point)
Kinetic energy is at its peak when the magnets are first released, then it decreases steadily. Energy stored in the magnetic field becomes zero.
The kinetic energy of the system is derived from the thermal energy created by increased velocity. Energy stored in the magnetic field does not change.
Answers
Kinetic energy and velocity are at zero when the magnets are held apart, and both increase rapidly when they are released and move together. Energy stored in the magnetic field decreases.
Graph for the two magnets held apart, kinetic energy is highest when the magnets first released, then it decreases steadily. Energy stored in the magnetic field becomes zero.
What is magnetic field?The magnetic field is the field in the space and around the magnet in which the magnetic field can be filled.
Magnetic force is the force of attraction or repulsion between two poles of the two magnets. The magnetic force is also appearing between two electrically charged bodies.
Two magnets held apart. Once released, the south pole of one magnet moves toward the north pole of another magnet until the magnets collide.
The graph reflection of kinetic energy of magnet -
When the two magnets are held apart, then the these magnets are at rest and do not possess any kinetic energy.When, the magnets released, then they started to move each other due to the magnetic force of attraction of opposite poles. Therefore, the kinetic energy between two magnets started to increase with the highest speed.Now, as they started to move towards each other, this speed started to reduced and become zero when they meat each other. Here at this point the energy stored in the magnetic field becomes zero.Therefore, graph for the two magnets held apart, kinetic energy is highest when the magnets first released, then it decreases steadily. Energy stored in the magnetic field becomes zero.
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3.
Where is the weight of an object more on earth, Equator or poles? Why?
Answers
Answer:
The weight of an object at the poles is more than the weight of the object at the equator
Explanation:
The shape of the Earth is an ellipsoid such that the distance from the North and South poles to the Earth's center, R₁, is less than the distance from the Equator to the center of the Earth, R₂
The weight of an object is given by the universal gravitational law as follows;
[tex]Weight = F_{gravity} =G\times \dfrac{M \cdot m}{R^{2}}[/tex]
Where;
[tex]F_{gravity}[/tex] = The force of gravity = The weight of an object
G = The universal gravitational constant
M = The mass of the Earth
m = The mass of the object
R = The radius of the Earth
Where R₁ < R₂, we have;
The weight at the Poles, W₁ = [tex]G\times \dfrac{M \cdot m}{R_1^{2}}[/tex]
The weight at the Equator, W₂ = [tex]G\times \dfrac{M \cdot m}{R_2^{2}}[/tex]
We have;
[tex]\left(G\times \dfrac{M \cdot m}{R_1^{2}} \right) > \left(G\times \dfrac{M \cdot m}{R_2^{2}} \right) \because R_1 < R_2[/tex]
Therefore, the weight of an object at the poles, W₁, is more than the weight of the object at the equator, W₂
Matthew throws a ball straight up into the air. It rises for a period of time and then begins to drop. At which points in the ball’s journey will gravity be the greatest force acting on the ball?
Answers
Answer:
When the ball falls down.
An airplane traveling at 201 m/s makes a turn. What is the smallest radius of the circular path (in km) that the pilot can make and keep the centripetal acceleration under 5.0 m/s2 ?
Answers
Answer:
the smallest radius of the circular path is 8.1 km
Explanation:
The computation of the smallest radius of the circular path is given below:
Given that
V = Velocity = 201 m/s
a_c = acceleration = 5 m/s^2
radius = ?
As we know that
a_c = V^2 ÷ r
5 = 201^2 ÷ r
r = 201^2 ÷ 5
= 8,080.2 g
= 8.1 km
Hence, the smallest radius of the circular path is 8.1 km
What evidence can be used to explain that energy cannot be created nor destroyed?
Answers
Answer: The total amount of energy and matter in the Universe remains constant, merely changing from one form to another. The First Law of Thermodynamics (Conservation) states that energy is always conserved, it cannot be created or destroyed. In essence, energy can be converted from one form into another. Hopefully i helped
Explanation:
Calculate the momentum for the 5 kg bowling ball moving at 6 m/s.
Answers
Answer:
Given
mass (m) =5kg
velocity (v) =6m/s
momentum (p) =?
Form
p=mv
5kgx6m/s
p=30kg.m/s
momentum =30kg.m/s
I WILL GIVE BRAINLIEST!!!
Answers
Answer:
7.27 m/s
Explanation:
40/5.5 = 7.27m/s
A 50Kg girl jumps off a 5-meter-high diving board. What is her kinetic energy right before she hits the water?
Answers
Answer:
2450 J
Explanation:
Given that,
A 50Kg girl jumps off a 5-meter-high diving board.
We need to find the kinetic energy of the girl before she hits the water. At this point the kinetic energy becomes equal to the potential energy such that,
[tex]K=mgh\\\\K=50\times 9.8\times 5\\\\K=2450\ J[/tex]
So, her kinetic energy right before she hits the water is equal to 2450 J.
what is the y axis on a graph?
Answers
In 1969, Apollo 11 landed on the Moon. It took four days for the spacecraft to travel from Earth to the Moon. In 2006, New Horizons left Earth and reached Pluto in 2015. Based on this information, what is the most reasonable estimate for a spacecraft to travel from Earth to Mars?
Answers
Answer:
An estimate for the time it will take for a spacecraft to travel from Earth to Mars is approximately 138.8 days
Explanation:
The distance between Earth and the Moon = 684,400 km
The distance between Earth and Mars = 220.58 × 10⁶ km
The distance between Earth and Pluto = 5.2241 × 10⁹ km
The ratio of the distance between Earth and Pluto and the distance between Earth and Mars = (5.2241 × 10⁹ km)/(220.58 × 10⁶ km) ≈ 23.683
It took 2006 to 2015 (9 years) to travel from Earth to Pluto, therefore, it can take approximately (9 years)/(23.683) ≈ 0.38 of a year which is ((9 years)/(23.683)) × 365.2422 ≈ 138.8 days for a spacecraft to travel from Earth to Mars
Can someone please help for a , what am I meant to do
Answers
A force of 31 N south is used to accelerate an object uniformly from rest to 8 m/s in 22 s. What is the mass of the object?
Answers
this question is centered around newtons second law f=ma
First you need to find the acceleration
[tex] acceleration = \frac{8 - 0}{22} [/tex]
that gives you 0.36 recurring(on both numbers) m/s²
mass= force ÷ acceleration
[tex] mass = \frac{31}{0.36recurring} [/tex]
mass= 85.25 kg
if you want to check
f=ma
85.25 × 0.36 recurring (remember its on both numbers not just 6) = 31 N
Answer:
Explanation:
Givens
F = 31 N
vi = 0
vf = 8 m/s
t = 22 seconds
m = ?
Formula
F = m ( vf - vi)/t
Solution
31 = m (8 - 0) / 22 Multiply both sides by 22
31 * 22 = 8 * m
8m = 682 Divide by 8
m = 682 / 8
m = 85.25
name 6 countries where soccer is called football
Answers
Answer:
Brazil, France, Spain ,Puerto rico,Venezuela, Yemen
Explanation:
how is electromagnets magnetic field is controlled by a switch
Answers
Answer:
They affect by switch by the conductors
Explanation:
sana makatulong
What role does math play in physics?
Answers
Answer:
To provide mathematical models for describing physical reality.
HELP PLS I DONT UNDERSTAND AHHHHHHHH-
Answers
Answer:
X rays
Explanation:
doctors use x rays to look at your bones
if my answer helps please mark as brainliest.
The data table shows the sound levels of common noise sources.
A 2 column table with 13 rows. Column 1 is labeled sound in decibels with entries 140, 130, 120, 110, 100, 90, 80, 70, 60, 50, 40, 30, 20. Column 2 is labeled noise source with entries jet engine at 25 meters, jet aircraft at 100 meters, rock and roll concert, pneumatic chipper, woodworking machines, chainsaw, heavy truck traffic, business office, conversational speech, library, bedroom, secluded woods, whisper.
Which profession has the greatest risk of sound damage to the ear?
woodworker
librarian
teacher
truck driver
Answers
Answer: woodworker
Explanation: just took it
Based on the data table, the profession with the greatest risk of sound damage to the ear is likely to be a woodworker. The correct option is A.
What is a sound wave?Sound waves are a type of longitudinal wave that travels through a medium, such as air or water, and is caused by the vibration of particles in the medium. When an object vibrates, it creates a disturbance in the surrounding particles, which in turn creates a wave of pressure changes that propagates through the medium. These pressure waves can be detected by our ears and perceived as sound.
The characteristics of sound waves include frequency, wavelength, amplitude, and velocity. Frequency refers to the number of cycles of the wave that occur per second and is measured in Hertz (Hz). Wavelength refers to the distance between two consecutive points in a wave that are in phase with each other. Amplitude refers to the maximum displacement of the particles from their equilibrium position and is related to the loudness of the sound. Velocity refers to the speed at which the wave travels through the medium and is dependent on the properties of the medium, such as its density and stiffness.
Sound waves are used in many applications, including communication, music, medical imaging, and sonar.
Here in the question,
Woodworking machines produce a sound level of 90 decibels, which is considered to be hazardous to hearing with prolonged exposure. Librarians, teachers, and truck drivers are not listed as noise sources in the table and their risk of sound damage would depend on their specific work environment and exposure to noise.
Therefore, According to the data table, the profession with the highest risk of ear damage is likely to be woodworker.
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A flat screen TV uses 120 Watts. How much energy is used up if it is left on for 15 minutes? Question 25 options: 4 J 15 J 0.67 J 108,000 J
Answers
Answer:
Option d (108,000 J) is the correct answer.
Explanation:
The given values are:
Power,
P = 120 Watts
Time,
t = 15 min.
i.e.,
= 900 sec
As we know,
⇒ [tex]P=\frac{W}{t}[/tex]
So,
⇒ [tex]W=P\times t[/tex]
On substituting the given values, we get
⇒ [tex]=120\times 900[/tex]
⇒ [tex]=108,000 \ J[/tex]
Which two options describe physical properties of matter?
A. Whether a substance floats or sinks in water
B. Whether a substance tarnishes
C. The ability of a substance to combine with other substances
D. The temperature at which a substance boils
E. Whether a substance can be burned
Answers
Answer:
A. (Buoyancy) and D. (Temperature)
Explanation:
I took itttttttttttttttt
The physical properties of matter are A and D.
What are the properties of matter?
Those who have mass and occupy space are called matter.those are residences together with mass, weight, quantity, and density. Density calculations can be mentioned in a while in chapter 3, however for now just remember the fact that density is a physical property. physical houses that do not depend on the amount of substance present are called extensive residences.
Among the following the properties of matter are:-
A. Whether a substance floats or sinks in water.
D. The temperature at which a substance boils.
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Can someone explain to me what omega(ω) represents and what theta(θ) represents when it comes to angular motion?
Answers
Answer:
the twenty-fourth, and last, letter of the Greek alphabet (Ω, ω), transliterated as ‘o’ or ‘ō.’.
Explanation:
natural magnet is known as _________
Answers
Answer:
a lodestone
Explanation:
a lodestone is a naturally magnetized piece of the mineral magnetite.
Un parașutist are, împreună cu parașuta, o masă de 110 kg. Atunci când parașuta este deschisă, el are o mișcare rectilinie și uniformă. b) Calculează forța de rezistență a aerului în situația descrisă.
Answers
Answer:
The calculation and explanation is given below:
Explanation:
a) Here the forces represent that there are parachutist weight and the parachute G also the force of air resistance.
b) As the displacement would be made in HRM so the weight and Air resistance force would be equivalent in the opposite way
G = mg
= 110 × 10
= 1100N
Fr = 1100N
all of u what is the cause for moving object to speed up or down
Answers
Answer:
Forces make things speed up (or accelerate). When a force pushes or pulls the object, the object will move in the direction of the force. The bigger the force, and the lighter the object, the greater the acceleration.
Explanation: