Answer:
interference affects analog more
Explanation:
Which explanation best describes a wave?
A.
a disturbance that travels through a medium with a transfer of energy and matter
B.
a disturbance that travels through a medium without a transfer of energy and matter
C.
a disturbance that travels through a medium with a transfer of energy and without a transfer of matter
D.
a disturbance that travels through a medium with a transfer of matter and without a transfer of energy
E.
a disturbance that travels only in the absence of a material medium
Answer:
C. a disturbance that travels through a medium with a transfer of energy and without a transfer of matter
Explanation:
A wave is any disturbance that transfers energy from one location to the other via a substance called medium. It is important to note that a wave only conveys energy and not matter. For example, sound wave is a type of wave that carries sound energy from one place to another via mediums such as water, air etc.
Hence, according to this question, a wave can be described as a disturbance that travels through a medium with a transfer of energy and WITHOUT A TRANSFER OF MATTER.
A car is sitting still what could cause the car to move
The tools to distinguish the thickness of two objects of thickness of 1.92mm and the other with thickness of 1.93mm is ?
Answer:
the instrument that gives this precision is the micrometer screw
Explanation:
The high precision measurements of small parts are the general vernier and the micrometer screw.
In these two instruments the same principle is used: there is a fixed rule and a mobile one that increases precision.
Let's analyze the absolute error or precision of each instrument
* For the vernier, the precision of the fixed rule is 1 mm and there are 20 divisions (the most common); therefore the precision of the instrument is
Δx = 1 mm / 20
Δx = 0.05 mm
* For the micrometer screw, the precision of the fida rule is 0.5 mm and the number of divisions is 50, therefore the precision of the screw is
Δx = 0.5mm / 50
Δx = 0.01 mm
consequently the instrument that gives this precision is the micrometer screw
Look at the following chemical equation.
4Al + 3O2 → 2Al2O3
What is true about this chemical equation?
A
It is balanced because the mass of the reactants is equal to the mass of the products.
B
It is balanced because the number of reactants is equal to the number of products.
C
It is unbalanced because the mass of the reactants is greater than the mass of the products.
D
It is unbalanced because the number of reactants is greater than the number of products.
Answer:
it would be c
Explanation:
its the only one that makes sence
1. Explain what the frequency of a transverse wave is.
2. What happens to the wave when you set the amplitude to 0 mm?
3. What happens when you move the amplitude to 40 mm?
4. Explain what the amplitude of a transverse wave is.
Explanation:
I am not understanding your question
How can you describe the path of the projectile motion?
Projectile motion is a motion where an object moves in a bilaterally symmetrical path
What is a Projectile motion ?Projectile motion is a form of motion experienced by an object or particle that is projected near Earth's surface and moves along a curved path under the action of gravity only.
If an object is thrown up by making a certain angle with respect to ground ( let say theta) up in the sky , it will reach a maximum height after which it follows a symmetrical path as it comes down due to the action of gravity . The path followed from the beginning till end will be a parabolic in this case .
It is a motion where an object moves in a bilaterally symmetrical path .
Projectile motion only occurs when there is only one force applied at the beginning of the trajectory, after been released object comes in the action of gravity .
General form of equation of trajectory of Projectile motion can be written as :
y = x tan(theta ) - g(x^2)/(2(u^2)cos^2(theta))
where y = horizontal component
x = vertical component
g = gravity
u = initial velocity
theta = angle of inclination of the initial velocity from horizontal axis
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(b) A lift (elevator) in a high building transports 12 passengers, each of mass 65 kg, through a
vertical height of 150 m in a time of 64 s.
(0) Calculate the power needed to transport the passengers through this height.
power =
Explanation:
P =F * v
F = m * a = 65 kg * 9.81 ms^-2 * 12 passengers
v = d/t = 150m / 64 s
I think you can calculate and substitute this units should be watts
The power needed to transport the passengers through this height is 17.933 KW or 17933 Watts.
What is Power?Power can be defined as the rate at which work is done by an object. Power can be calculated by the formula:
P = W × t
where, P = power, w = work done, and t = time taken.
The SI unit for power is the watt (W), where 1 watt power is equal to 1 joule/second (1W = 1J/s). Because, the work done by an object is the energy transfer by the object, and power is also the rate at which energy is expended.
P = F × v
where, P = Power, F = Force, and V = velocity of the object
F = m × a = 65 kg × 9.81 ms⁻² × 12 passengers = 7651.8
v = d/t = 150m / 64 s = 2.343
P = 7651.8 × 2.343
P = 17,933.90
P = 17.933 KW
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5- A 2.0 kg block of aluminum (specific heat = 897 J/kg·K) is at an initial temperature of 300 K. What will its final temperature be if (3.35 × 105 J )of thermal energy is transferred to the block?
Answer:
T = 486.6 K
Explanation:
The final temperature of the block can be found using the following formula:
[tex]Q = mC\Delta T\\[/tex]
where,
Q = Thermal Energy Transferred = 3.35 x 10⁵ J
m = mass of aluminum block = 2 kg
C = Specific Heat = 897 J/kg.K
ΔT = Change in Temperature = T - 300 K
T = Final Temperature of the Block = ?
Therefore,
[tex]3.35\ x\ 10^5\ J = (2\ kg)(897\ J/kg.K)(T-300\ K)\\\\5.38\ x\ 10^5\ J + 3.35\ x\ 10^5\ J = (1794 J/K)(T)\\\\T = \frac{8.73\ x\ 10^5\ J}{1794\ J/K}[/tex]
T = 486.6 K
What is the resultant?
1400 N
643 N
Tall buildings have lightning rods to protect them from lightning strikes. Explain wy the rods rare pointed in shape and taller than the buildings.
Answer:
the rods are pointed so it can absurb the energy from the lighting and taller than the building so it hits the rod first instead of the building
Explanation:
hope this helps
∞∞∞∞∞∞∞∞∞∞
Since a light year is a unit of astronomical distance equal to the distance light travels in one year, which phrase best completes the sentence? The distance from the sun to Earth would be ___________.
Question 3 options:
exactly one light year
less than one light year
any number of light years
more than one light year
Answer:
less than one light year
Explanation:
earth is 0.00001581 light years away from the sun :)
What is the current measured by ammeter 4?
Answer:
I dont know
Explanation:I dont know either
Suppose the mass of a fully loaded module in which astronauts take off from the Moon is 2000 kg. The thrust of its engines is 8600 N. Calculate its acceleration in a vertical takeoff from the Moon.
Answer:
The acceleration during the take-off from the moon is 4.3 m/s²
Explanation:
Given;
the mass of the fully-loaded module, m = 2000 kg
The thrust of its engines, F = 8600 N
Apply Newton's second law of motion to determine the acceleration during the take-off from the moon;
F = ma
where;
a is the acceleration
a = F / m
a = 8600/2000
a = 4.3 m/s²
Therefore, the acceleration during the take-off from the moon is 4.3 m/s²
17. ____ Objects with more mass have
a. more gravity b. less gravity
c. more acceleration
d. less inerties
a. more gravity
This is the answer.
newton's second law states that when a net force acts on an object, it accelerates it.Explain how it would be possible for two or more forces to act on object without accelerating it
Answer:
See Explanation
Explanation:
According to Newton's second law of motion, the acceleration of a body is proportional to the net external force that acts on the body.
A body accelerated when it is acted upon by an unbalanced net external force.
When the external forces acting on a body are balanced, the effect of each force is cancelled by the other hence the body is not accelerated according to Newton's second law.
An acceleration of +3.5 m/s² results when two forces act on an object. The first
force is 100 N to the right and the second force is 40 N to the right. (A) What is
the net force on the object? (B) What is the object's mass?
Answer:
Explanation:
Since the forces oppose each other (direction), the smaller is subtracted from the larger. The net force is
Fn = 100 - 40 = 60
Part B
Fn = m * a
a = 3.5 m/s^2
Fn = 60
60 = m * a
60 = m * 3.5 Divide by 3.5
60/3.5 = m
m = 17.143
In a concave mirror, if the object is located beyond the center of curvature the image formed is real, inverted, and smaller than the object. but, if the object is located between the center of curvature and the focal point, the image is real, inverted, and ____ Than the object
A) Also smaller
B) Lager
C) The same size
D) Disappears
¿Cuál es la intensidad del campo eléctrico a una distancia de 2 m de una carga de -12μC? *
Answer:
Una secadora de cabello tiene una resistencia de 10Ω al circular una corriente de 6 Amperes, si está conectado a una diferencia de potencial de 120 V, durante 18 minutos ¿Qué cantidUna secadora de cabello tiene una resistencia de 10Ω al circular una corriente de 6 Amperes, si está conectado a una diferencia de potencial de 120 V, durante 18 minutos ¿Qué cantidad de calor produce?, expresado en caloríasad de calor produce?, expresado en calorías
When placed at a certain point, a
0.110 C charge feels an electric
force of 19.8 N. What is the
magnitude of the electric field at
that point?
Answer: 180
Explanation: Acellus
This equation gives the magnitude of the electric field generated by a point charge Q. The distance r in the denominator is the separation between the point of interest and the point charge Q. Or the center of a spherical charge.
What magnitude of the electric field at that point?It is simple to determine the size of the electric field by calculating the force per charge on the test charge. From this definition, the common metric units for electric field strength are derived. Electric field units would be force units divided by charge units, as the definition of an electric field is a force per charge.
F = |qvBsin()| calculates the magnetic force's magnitude. The following factors are involved in determining the force's direction. A plane is first defined by the magnetic field vector, B, and the velocity vector, v. In or out of this plane, the magnetic force is perpendicular to it.
Therefore, The electric force F, or Coulomb force, exerted per unit positive electric charge q at that place can be used to determine an electric field's strength, or E = F/q.
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Joe follows the procedure below to make a compass.1. Move a magnet from the top of a needle to its point fifty times.2. Lay the needle on a cork that is floating in a bowl of water.3. Observe the direction that the needle points.What is the purpose of step 1
Answer:
The purpose of step 1 is to induce magnetism into the needle, so that it retains magnetism and behaves as a magnet after the process.
Explanation:
The method of production the needle magnet in the procedure is the single stroke. This process involves a continuous stroking of a magnetic object (e.g needle) repeatedly for a period or number of times with a permanent magnet. Thus, when the permanent magnet is removed, the object retains magnetism, and behaves like a magnet.
The importance of the stroking process is the turn a magnetic object to a magnet by inducing magnetism into it.
Which of the following is a disadvantage of a parallel circuit? A. Parallel circuits are a complex circuit and use more wire. B. If one bulb goes out the others go out too. C. Each of the bulbs burn at a different level of brightness.
Argon, atomic number 18, has an atomic weight of 39.9. Potassium, atomic number 19, has an atomic weight of 39.1. Which of these statements best explains why potassium has a lower atomic weight than argon?
A.
Potassium is reactive, while argon is typically inert.
B.
Potassium atoms lose electrons more easily than argon atoms.
C.
Potassium is typically a solid, while argon is typically a gas.
D.
Potassium atoms usually have fewer neutrons than argon atoms.
Answer: D
Explanation:
Atomic weight is measured by adding the number of protons and neutrons in an atom's nucleus. Argon's atomic number is 18 while potassium's is 19. This means that Argon will always have 18 protons while potassium will always have 19 protons.
To make the numbers easier to work with, round each atomic weight. We'll say the atomic weight of potassium is 39 and the atomic weight of argon is 40. To see how many neutrons each one has, I can set up a simple equation for each using the following equation:
Atomic weight = protons + neutrons
Potassium:
39 = 19 + N --> N = 20
Argon:
40 = 18 + N --> N = 22
An atom is defined by the number of protons it has, but the number of neutrons can vary. We call these isotopes, or atoms with the same number of protons but a different number of neutrons. As the math shows, argon typically has more neutrons per atom than potassium does.
Elements : Atoms :: Covalent compounds:____
Answer:
Hcl
Explanation:
Hydrogen and chlorine charge electrons and are non metals while compounds with metals are ionic
Two boulders have masses of 7.5 x 106 kg and 9.2 x 105 kg. After rolling apart, their centers are separated by a distance of 124 m. Find the gravitational attraction FG between them.
Answer:
0.0299 N
Explanation:
Applying,
F = Gmm'/r²................... Equation 1
Where F = gravitational force between the boulders, m = mass of the first boulder, m' = mass of the second boulder, r = distance between the boulders, G = Universal constant.
From the question,
Given: m = 7.5×10⁶ kg, m' = 9.2×10⁵ kg, r = 124 m
Constant: G = 6.67×10⁻¹¹ Nm²/kg²
Substitute these values into equation 1
F = (6.67×10⁻¹¹× 7.5×10⁶ × 9.2×10⁵ )/124²
F = (460.23)/15376
F = 0.0299 N
Answer:
0.3 N
Explanation:
Plug in all your variables:
6.67 ⋅ 10^-11 (7.5 ⋅ 10^6) (9.2 ⋅ 10^5)
--------------------------------
(124)^2
Once you plugin, You start to multiple solving to solve your problem:
460.23
---------- = 0.02993171 N
15376
Now Simplify:
Answer = 0.03 N
The diagram below represents a light ray striking the boundary between air and glass. What would be the angle between this light ray and its reflected ray?
30°
60°
120°
150°
Answer:
120°
Explanation:
straight line = 180°
light ray = 30°
the reflection will be like a mirror image
30°+30° = 60°
180° - 60° = 120°
The angle of incidence and the angle of reflection are equal
The correct option for the angle between the given light ray and the reflected ray is the option;
120°
Reason:
The given parameter are;
The angle formed by the light ray and the glass surface = 30°
Required:
To find the angle between the light ray and the reflected ray
Solution:
According to the laws of reflection, the angle between the incident ray and the normal is equal to the angle made between the reflected ray and the normal
The angle made between the incident ray and the normal, [tex]\theta _i[/tex] = 90° - 30° = 60°
Therefore, according to the laws of reflection, we have;
The angle made between the reflected ray and the normal, [tex]\theta _r[/tex] = The angle between the incident ray and the normal, [tex]\theta _i[/tex] = 60°
The angle made between the reflected ray and the normal, [tex]\theta _r[/tex] = 60°
The angle between the given light ray and reflected ray, θ = [tex]\theta _i[/tex] + [tex]\theta _r[/tex]
∴ θ = 60° + 60° = 120°
The angle between the given light ray and the reflected ray, θ = 120°
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If the oil film becomes dark when the path length difference is less than one fourth the wavelength, what is the thickest the oil film can be and appear dark at all visible wavelengths
His question is incomplete, the complete question is;
A film oil on water will appear dark when it is very thin, because the path length difference becomes small compared with the wavelength of light and there is a phase shift at the top surface.
If the oil film becomes dark when the path length difference is less than one fourth the wavelength, what is the thickest the oil film can be and appear dark at all visible wavelengths. Oil has an index of fraction of 1.40.
In this question, assume the wavelength visible light is in the range of 400 nm to 700 nm.
Answer:
the minimum thickness of the oil for destructive interference to occur is approximately 35.714 nm
Explanation:
Given the data in the question;
Path difference for destructive interference between the two reflected waves ( top and bottom );
δ = 2nt ---------- let this be equation 1
Also, for one path difference of reflected waves, one fourth of the wavelength of reflected waves;
δ = λ/4 ---------- let this be equation 2
from equation 1 and 2;
δ = δ
2nt = λ/4
we find t;
8nt = λ
t = λ / 8n
given that; λ[tex]_{minimum[/tex] = 400 nm and n = 1.40
we substitute
t = 400nm / 8(1.40)
t = 400nm / 11.2
t = 35.7142857 ≈ 35.714 nm
Therefore, the minimum thickness of the oil for destructive interference to occur is approximately 35.714 nm
After performing a long equation using the conservation of mechanical energy you get a final answer that is negative. What does this mean?
A. Because energy is scalar it means that the energy is less than 0.
B. Because energy is scalar it means that the energy was transferred somewhere else.
C. Because energy is a vector it means that the energy was destroyed in the opposite direction.
D. Because energy is scalar it means that the energy was destroyed.
Answer:
The correct option is D.
Explanation:
The energy is the capacity to do work.
There are several types of energies.
1. kinetic energy : it is due to the motion of the body.
2. Potential energy : It is due to the position or the configuration of the body.
3. Mechanical energy: The sum of the kinetic energy and the potential energy is called mechanical energy.
The energy is a scalar quantity.
According to the law of conservation of energy, the energy can not be created and cannot be destroyed, it can transformed from one form to another.
When we get the mechanical energy negative, it means the energy was destroyed in some other forms of energy.
Select all the correct answers.
A worker is holding a filled gas cylinder still. Which two sentences are true about the energy of the filled gas cylinder?
It has no energy because it's being held still
it has gravitational potential energy because of its height
its atoms and molecules have thermal energy
it has motion energy because it will fall if let go
its kinetic energy is being converted to potent energy
Answer:
b and c
Explanation:
its correct
A woman on a 10-speed bicycle travels at 9m/s relative to the ground as she passes a little boy on a tricycle going in the opposite direction. If the boy is travelling at 1m/s relative to the ground , how fast does the boy appear to be moving relative to the woman
Answer:
23
Explanation:
What is/are the products in the chemical equation?
Answer:NH3
Explanation: product s are the result of the equation
[tex]\huge{ \mathfrak{ \underline{ Answer }}}࿐[/tex]
The balanced Chemical equation for above reaction is :
[tex] \mathrm{N_2 + 3H_2 \rightarrow 2NH_3}[/tex]
The product formed here is [tex]NH_3[/tex] (Ammonia)
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