Answer:
a) destructive interference
b) 0.75 m and 3.25 m
Explanation:
Taking a look at constructing interference, the path difference is given as
Δl = mλ
On the other hand, path difference for its destructive interference is given as
Δl = (m + ½) λ
a)
It's a Destructive interference because of the fact that The wavelength is 5m while the sources are separated by 4m. Constructive interference could only have been possible if and when the path difference is 5.
b)
Assuming that m = 0, then
Δl = (0 + ½)λ
Δl = ½λ, where Δl = l2-l1
l2 - l1 = ½λ
l2 - l1 = 5/2
l2 - l1 = 2.5
On the other hand, the question says that l1 + l2 = 4. So, on solving simultaneously, we have
l2 + l1 = 4
l2 - l1 = 2.5
2l1 = 1.5
l1 = 1.5/2
l1 = 0.75 m
l2 = 4 - l1
l2 = 4 - 0.75
l2 = 3.25 m
a) Two in-phase sources of waves are separated by a distance will have destructive interference
b) The location will be 0.75 m and 3.25 m
What is destructive interference?Destructive interference occurs when the maxima of two waves are 180 degrees out of phase: a positive displacement of one wave is cancelled exactly by a negative displacement of the other wave. The amplitude of the resulting wave is zero.
Taking a look at constructing interference, the path difference is given as
Δl = mλ
On the other hand, path difference for its destructive interference is given as
Δl = (m + ½) λ
a) It's a Destructive interference because of the fact that The wavelength is 5m while the sources are separated by 4m. Constructive interference could only have been possible if and when the path difference is 5.
b)Assuming that m = 0, then
Δl = (0 + ½)λ
Δl = ½λ, where Δl = l2-l1
l2 - l1 = ½λ
l2 - l1 = 5/2
l2 - l1 = 2.5
On the other hand, the question says that [tex]I_1+I_2=4[/tex] . So, on solving simultaneously, we have
[tex]l_2 + l_1 = 4[/tex]
[tex]l_2 - l_1 = 2.5[/tex]
[tex]2 \ l_1 = 1.5[/tex]
[tex]l_1 = \dfrac{1.5}{2}[/tex]
[tex]l_1 = 0.75 m[/tex]
[tex]l_2 = 4 - l_1[/tex]
[tex]l_2 = 4 - 0.75[/tex]
[tex]l_2 = 3.25 m[/tex]
Hence the location will be 0.75 m and 3.25 m
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What is the difference between center of mass and center of gravity?
Answer:
Centre of mass is the point at which the distribution of mass is equal in all directions, and does not depend on gravitational field. Centre of gravity is the point at which the distribution of weight is equal in all directions, and does depend on gravitational field.
Answer:
Centre of mass is the point at which the distribution of mass is equal in all directions, and does not depend on gravitational field.
Centre of gravity is the point at which the distribution of weight is equal in all directions, and does depend on gravitational field.
hope this helps you ☺️☺️
4. When an ice cube in a glass of water melts, does the water level in the glass
rise or fall or remain unchanged? Explain your answer. What law guides
your answer?
Answer:
it remains unchanged
Explanation:
it remains unchanged because the ice was already in there unless it was taken out then the water would have gone down.
What is revolution?
A. The spinning of an object on its axis
B. The motion of an object along a curved path
C. The orbit of a satellite around a central body
D. The motion of two objects around each other
Explanation:
B. the motion of an object along a curved path
hope it helps.
Answer:
the orbit of a satellite around a central body
Explanation:
hope that helps :)
A spark ignition engine of four-cylinder four-stroke cycle of a
bore=88mm and a stroke of 84mm produce a torque of 160
N.m at 2200 rpm. The specific fuel consumption is 0.370
kg/kW.hr , the air fuel ratio is 18.5:1 and the LCV= 44500
kJ/kg. Determine:-
1-the brake power
2-the brake thermal efficiency
3-the volumetric efficiency if Pa= 1.0132 bar and Ta=310 K
4-the mean piston speed
Answer:
1-Pb=36.86 Kw
2-nb= 22.3%
3-nV=52.69%
4-SP=369.9 m/s
Explanation:
*Note we have ideal gas so PV=mRT --> P=(m/V)RT--> P=pRT--> p= P/RT
What creates a mechanical turning force in an
electric motor?
A) A single magnetic field
B) Two magnetic fields
C) Microwaves, generated by an electro-magnetic
device
Which type of diffraction occurs when the point source and the screen are at finite distances from the obstacle forming the diffraction pattern?
A. fraunhofer
B. fresnel
C. far-field
D. single slit
please answer this im not sure
Answer:
the answer is B
how do the conditions in tube c prevent air reaching the iron nail
Answer:
The conditions stop air from getting to the nail is the oil
Explanation:
Which group is an international organization which United States is
involved
Answer:
D. The World Bank.
Explanation:
UNDP is an acronym for United Nations Development Programme and it is a global (world) development initiative of the United Nations (UN). The main purpose of the United Nations Development Programme (UNDP) is to provide resources such as loans, grants and training to developing nations in order to improve their technical plans and infrastructural investments. One of the programmes sponsored by the United Nations Development Programme (UNDP) in developing countries around the world is the Sustainable Development Goals (SDGs).
Similarly, The World Bank is an international financial institution that is saddled with the responsibility of providing loans and grants to developing countries just like the United Nations Development Programme (UNDP).
Furthermore, several countries across the world such as Nigeria, Austria, Japan, Germany, United Kingdom, Ghana, Netherlands, Guinea, Brazil, Canada, China, Qatar, Egypt, United States of America, etc.
Hence, the World Bank is an international organization which the United States of America is involved.
X-rays are electromagnetic waves used to obtain images of bones. An x-ray machine produces x-ray waves with a frequency of 1.25 x 10^18 Hz.
(a) Calculate the time period of these x-rays.
Answer:
[tex]T=8\times 10^{-19}\ s[/tex]
Explanation:
Given that,
The frequency of x-ray is, [tex]f=1.25\times 10^{18}\ Hz[/tex]
We need to find the time period of these x-rays. Let it is be T. We know that, the relation between f and T is given by :
T = 1/f
So,
[tex]T=\dfrac{1}{1.25\times 10^{18}}\\\\=8\times 10^{-19}\ s[/tex]
So, the time period of these x-rays is equal to [tex]8\times 10^{-19}\ s[/tex].
The time period of the electromagnetic wave is 8.0 × 10⁻¹⁹ seconds.
Given the data in the question;
Frequency; [tex]f =1.25 * 10^{18}Hz[/tex]
Time period; [tex]T =\ ?[/tex]
Time period is simply the time taken for one complete cycle of vibration to pass a given point.
It is expressed as:
[tex]T = \frac{1}{f}[/tex]
We substitute our value into the equation
[tex]T = \frac{1}{1.25 * 10^{18}Hz} \\\\T = \frac{1}{1.25 * 10^{18}s^{-1}}\\\\T = 8.0 * 10^{-19}s[/tex]
Therefore, the time period of the electromagnetic wave is 8.0 × 10⁻¹⁹ seconds.
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What is the KE of a bicycle with a mass of 41kg traveling at a velocity of 8 m/s ?
Answer:
What is the kinetic energy of a bicycle with a mass of 14 kg traveling at a velocity of 3 m/s? Physics ... K=12mv2=12×14 kg × (3 m/s)2=63 Joule.
1 answer
63 Joule Explanation: K=12mv2=12×14 kg × (3 m/s)2=63 Joule
Explanation:
K=12mv2=12×14 kg × (3 m/s)2=63 Joule.
63 Joule Explanation: K=12mv2=12×14 kg × (3 m/s)2=63 Joule
Algebraic expression
In mathematics, an algebraic expression is an expression built up from integer constants, variables, and the algebraic operations. For example, 3x² − 2xy + c is an algebraic expression.
Hope it helps u
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A container contains 26 ounces of salt. Convert 26 ounces to pounds.
Answer:
1.625 Pounds Explanation:
Which of the following describes what all electromagnetic waves have in common?
O They are all visible to the human eye
They all pass through different substances with the same frequency
O They all have the same wavelength
They all move through empty space at the speed of light,
1. For an object to gain energy ____ must be done on the object
2. When an object falls, it’s potential energy ______.
3. When an object gets further from the ground, it’s potential energy _____.
Answer:
Hello There!!
Explanation:
The answers are possibly:
1.Work
2.Increases
3.D.ecreases
hope this helps,have a great day!!
~Pinky~
[tex]\huge{\textbf{\textsf{{\color{navy}{An}}{\purple{sw}}{\pink{er}} {\color{pink}{:}}}}}[/tex]
1. Work
2. Increases
3. Decreases
thanks Hope it helps.
A student with a mass of 52 kg, starts from rest and travels down a 2 m slide. What is
the KE of the student at the bottom of the slide?
Answer:
https://www.ux1.eiu.edu/~cfadd/1350/Hmwk/Ch08/Ch8.html
Explanation:
what happen when you take off your clothes very quickly
Answer:
Nothing
Explain
Nothing happenes when you take off your cloths quickly.
Scientificly nothing really happnes.
According to the momentum principle, the change in momentum of an object equals the impulse, which depends on______
Answer: The momentum principle depends on MASS and VELOCITY.
Explanation:
The momentum principle states that net force changes the the momentum of an object where momentum is the product of the MASS of the body and it's VELOCITY.
Thus, momentum = mass(kg) ×velocity( m/s)= kgm/s ( derived unit)
Also to determine the rate of change of momentum;
Mass=m, initial velocity =u, final velocity = V and time =t
Initial momentum = mu
Final momentum = mv
Change in momentum = mv - mu
= m( v- u)
Rate of change of momentum=
m( v -u)/t --> equation 1
But V = u + at
Hence, a = v -u/t
Substitute for v -u/ t in equation 1
F = Kma, where k is constant and has the value of 1.
Therefore F = ma
Newton is the SI unit if force. It is defined as the force which gives a mass of 1kg an acceleration of 1 m/s².
IMPULSE is defined as the change of momentum of a body (mv-mu) or the product of force and time.
Thus impulse = force × time = m (v-u)
The unit is Ns ( Newton seconds) which is the same as change in momentum.
Tommy runs his juicer every morning. The juicer uses 90 w of power & the current supplied in 4.5 A. How many volts are necessary to run the juicer?
Answer:
20 Volts
Explanation:
Ohm's Law and Power Equations
Ohm's law equation (formula): V = I × R and the power law equation
(formula): P = I × V. P = power, I or J = Latin: influare, international ampere, or intensity and R = resistance. V = voltage, electric potential difference Δ V or E = electromotive force (emf = voltage).
Voltage or volts E or V: volts V
Resistivity or resistance R: ohms Ω
Wattage or power P: watts W
Amperage or current I: amperes, amps A
Can someone make a list of 10 simple things people can do to maintain fitness ? Or don’t list a lot
Answer:
1. sleep well
2. drink water
3. eat healthy
4. less sugar and salt
5. exercise 30 minutes daily
6. eat whole grains
7. eat fruits and vegetables
8. practice mental health
9. stay motivated
10. eat a variety of foods
The speed of sound is about 343 m/s . The wavelengths humans can hear range from .0017 m/cycle to 17m/cycle . What is the range of frequencies we can hear? Please help me !
Answer:
Explanation:
wavespeed = wavelength * frequency
wavespeed / wavelength = frequency
343 / 17 = 20.17 Hz
343 / 0.017 = 201764 Hz
So range of frequencies we can hear is between 20Hz and 20,000 Hz ( or 20.17 to 201764 if you dont round up/down)
what is the third law of newton
Answer:
To every action there is an equal and opposite reaction
Answer:
His third law states that for every action (force) in nature there is an equal and opposite reaction.
Explanation:
1) A speaker vibrates at a frequency of 2500 Hz. What is its period?
2) A swing has a period of 15 seconds. What is its frequency?
Please help, thank you!
It's easier for you to solve these than to try and read my solutions if I solve them.
Use this magic formula:
(period) · (frequency) = 1
If you handle the magic formula carefully and correctly, you can get these facts out of it:
-- Period = 1 / frequency
-- Frequency = 1 / period
Use the first one to solve #1.
Use the second one to solve #2.
and don't delete this
1. All living things are made of what?
2. What are the different parts of the cell that have jobs called?
3. What is the gel like material that fills the cell called?
4. What is the nucleus of the cell?
5. What organelle provides energy for the cell?
6. Where can you find ribosomes in a cell?
7. What does the cell membrane do for the cell?
8. What is the difference between genotype and phenotype?
Which of these 23rd chromosome
combinations is likeliest to result in a
person with male and female traits?
ΧΟ
XXX
XXY
XY
What is the kinetic energy of a 1 kg pie if it is thrown at 10 m/s?
Given
mass (m) = 1 kg
velocity (v) = 10 m/s
kinetic energy ( ke) = ?
,we know
K.E =1/2 m v²
= 1/2 * 1 * 10²
= 100/2
=50 joule
hope it helps :)
The kinetic energy of a 1 kg pie if it is thrown at 10 m/s is 50 joule.
What is kinetic energy?Energy due to motion of the body is kinetic energy. Whether an object is moving vertically or horizontally, it contains kinetic energy.
Kinetic energy can take many different forms, including vibrational (the energy resulting from vibrational motion), rotational (the energy resulting from rotational motion), and translational energy (the energy due to motion from one location to another). To keep things straight-forward, we'll concentrate on translational kinetic energy.
An object's mass (m) and speed (v) are two factors that affect how much translational kinetic energy it has (from this point on, the term "kinetic energy" will refer to translational kinetic energy). The kinetic energy (K.E) of an object is denoted by the equation below.
K.E = (1÷2)×m×v²
where m = mass of object
v = speed of object
Given that in question 1 kg pie is thrown at the velocity of 10 m/s,
K.E = (1÷2)×1×(10)²
K.E = 50 joule
So the kinetic energy of the pie is 50 joule.
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9.
The refractive index of water will change with its temperature due to the change in
density of its molecules.
a. True
b. False
The surface of the paper is phosphorescent. When light shines on it, some of the energy is absorbed and re-emitted slowly over time. The blue LED causes the surface to glow, but the green LED does not. Would a red LED to cause the surface to glow? Select the best answer from the choices provided. View Available Hint(s) Select the best answer from the choices provided. No Yes
Answer:
No
Explanation:
Recall that the hierarchy of wavelength color from minimum wavelength to maximum wavelength is:
[tex]V < I < B < G < Y < O < R;[/tex] and
[tex]E \ \alpha \ \dfrac{1}{\lambda}[/tex]
As a result, blue light has a higher energy level than green and red light.
As a result, the surface glows due to the blue LED. The green LED, on the other hand, would not allow the surface to glow as much as the red LED, which has a lower energy level when compared to the green light. As a result, the red LED would not allow the surface to glow as well.
14. When incoming light rays strike a flat, plane mirror at an
angle close to the surface of the mirror, the reflected rays
are.......
A. parallel to the mirror's surface
B. close to the mirror's surface
C. perpendicular to the mirror's surface
D. inclined high above the mirror's surface
Vouansinar choica:
Answer:
close to the mirrors surface
Explanation:
this is because angle of incidence equals angle of reflection
When jumping straight down, you can be seriously injured if you land stiff-legged. One way to avoid injury is to bend your knees upon landing to reduce the force of the impact. A 75-kg man just before contact with the ground has a speed of 5.5 m/s.
(a) In a stiff-legged landing he comes to a halt in 1.5 ms. Find the average net force that acts on him during this time.
275735 N
(b) When he bends his knees, he comes to a halt in 0.08 s. Find the average force now.
? N
(c) During the landing, the force of the ground on the man points upward, while the force due to gravity points downward. The average net force acting on the man includes both of these forces. Taking into account the directions of these forces, find the force of the ground on the man in parts (a) and (b).
stiff legged landing 275735 N
bent legged landing ??? N
Answer:
a)[tex]F_{net} =275000N[/tex]
b)[tex]F_{net}'= 386718.75N[/tex]
Explanation:
From the question we are told that:
Man's Mass [tex]M=75kg[/tex]
Speed of man [tex]V_m=5.5m/s[/tex]
a)
Landing time [tex]t_l=1.5ms[/tex]
Generally the equation for average net force F_{ net} is mathematically given by
[tex]F_{net} = 75 *5.5 /(0.0015) N[/tex]
[tex]F_{net} =275000N[/tex]
b)
Landing time [tex]t=0.08s[/tex]
Generally the equation for average net force[tex]F_{ net}[/tex] is mathematically given by
[tex]F_{net}' = impulse /time \\ F_{net}'= \frac{m * u}{t}[/tex]
[tex]F_{net}'= \frac{75 * 5.5}{0.08}[/tex]
[tex]F_{net}'= 386718.75N[/tex]