(A). The wavelength decreases by a factor of 3.
Introduction :Hi ! We all know that all type of electromagnetic wave, will have the same velocity as the speed of light, because light is part of electromagnetic wave too. The value of it is 300,000 km/s or [tex] \sf{3 \times 10^8} [/tex] m/s. As a result of this constant property, the shorter the wavelength, the greater the value of the electromagnetic wave frequency. This relationship can also be expressed in this equation:
[tex] \boxed{\sf{\bold{c = \lambda \times f}}} [/tex]
With the following condition :
c = the constant of the speed of light in a vacuum ≈ [tex] \sf{3 \times 10^{8} \: m/s} [/tex] m/s[tex] \sf{\lambda} [/tex] = wavelength (m)f = electromagnetic wave frequency (Hz)ExplanationIn this problem, we underline one concept, namely : "the shorter the wavelength, the greater the value of the electromagnetic wave frequency". In question, the frequency of the waveform will increase by a factor of 3 from the beginning. So, to keep this value constant, the wavelength should be reduced by a factor of 3 from the initial condition.
ProofAssume that:
c = c' = speed of the electromagnetic wave is always the same (constant).[tex] \sf{\lambda} [/tex] = initial wavelength = [tex] \sf{\lambda} [/tex]f = initial frequency = ff' = final frequency = 3fLet we count :
[tex] \sf{\lambda}' [/tex] = final wavelength = ... [tex] \sf{\lambda} [/tex]Step by step :
[tex] \sf{c = c'} [/tex]
[tex] \sf{\lambda \times f = \lambda' \times f'} [/tex]
[tex] \sf{\cancel{\lambda} \times \cancel f = x \cancel{\lambda} \times 3 \cancel{f}} [/tex]
[tex] \sf{1 = 3x} [/tex]
[tex] \sf{x = \frac{1}{3}} [/tex] (Q.E.D)
ConclusionSo, if the frequency value is increased by a factor of 3 from its original, then the wavelength will decrease by a factor of 3 from the original.
See MoreAn example of calculating the frequency of an electromagnetic wave https://brainly.com/question/26437116A person standing at the top of a hemispherical rock of radius R = 13.00 m kicks a ball (initially at rest on the top of the rock) to give it horizontal velocity vi as in Figure P4.62.
Answer:
A ther mody namic system absorbs 300J of heat and at the same time 400J of work is done onit calculate the change
Which of the following is an example of acceleration?
A boat sits on a boat trailer.
A boat sits on a boat trailer.
A car moves in a straight line at 60 km/hr.
A car moves in a straight line at 60 km/hr.
A plane moves in air at a steady speed of 850 km/hr.
A plane moves in air at a steady speed of 850 km/hr.
A bus moves on a straight road and then makes a right turn.
A bus moves on a straight road and then makes a right turn.
Answer:
i would say a bus because it has to speed up after the turn
Answer:
The bus
Explanation:
when the bus turns it has a change in direction and since velocity is a vector based on speed and direction the velocity is considered changed and since acceleration is a change in velocity the bus is an example of acceleration
The total magnification of an image is determined by.
Answer:
Magnification of the objective lens used and the magnification of the ocular lens.
Explanation: I hope you have/had an amazing day today<3
Suppose a car traveled 120 miles in two hours. What can we conclude about the car based on the mean value theorem.
What is the main difference between direct and alternating current
Answer:
» Direct current only flows in one direction with out reversing whereas alternating current flows in a sinusoidal wave form and reverse its direction of flow.
Explanation:
[tex]{}[/tex]
Answers are ONLY allowed to be ionic, polar covalent, and nonpolar covalent.
Ionic bonds occur between a metal and a nonmetal.
Covalent bonds occur between only nonmetals.
Polar covalent bonds occur between two nonmetals that are different types of atoms.
Nonpolar covalent bonds occur between the same kinds of nonmetal atoms.
Question:
Oxygen (O) and Oxygen (O)
a.) What type of bond will form between these two elements?
b.) Why?
2 % of freshwater is locked in ______.
4. If a player has more mass they will also have more ____
Answer:
momentum.
Explanation:
This is because mass is directly proportional to momentum.
3. What is the acceleration of a car at rest that stays at rest over 10 seconds?
a. 0.0 m/s2
b. 10 mph/s
C.-10 mph/s
d. 10 m/s2
e. Not enough data is given.
Answer:
a.
Explanation:
Use accleration formula,
[tex]a = \frac{v _{f} - v _{i}}{t} [/tex]
The initial velocity and final velocity is at zero. and t=10
So we got
[tex] \frac{0}{10} = 0[/tex]
so
[tex]a = 0[/tex]
a is the answer
Usain Bolt, a Jamaican sprinter, holds the Olympic and world records for the 100-m and 200-m dash, which he
achieved during the 2008 Summer Olympics in Beijing, China. He finished the 200-m dash in 19.30 seconds.
What was his speed?
If one person pushes on an object with a force of 200 N and another person pushes with a force of 150 N in the opposite direction, what is the net force on the object?
So, their net force on the object is 50 N in a forward direction from the first person.
IntroductionHi ! Here, I will help you with the net forces (results of forces) acting on a two-dimensional area and in opposite directions. Steps that can be taken are as follows :
Determine where the force will go, the important thing is that you are consistent until the end. Count the values of the force acting, the force against the direction of your mind in number 1 is given a negative sign.Look at the results, if it's marked (-), then choose the opposite direction from your thoughts at number 1.The equation for calculating the net force from this two-dimensional straight line is as follows:
[tex] \boxed{\sf{\bold{\sum F = F_1 + F_2 + ... + F_n}}} [/tex]
With the following condition :
[tex] \sf{\sum F} [/tex] = net force (N)[tex] \sf{F_1} [/tex] = first force and its direction (N)[tex] \sf{F_2} [/tex] = second force and its direction (N)[tex] \sf{... + F_n} [/tex] = You can add up the force values as many times as the question (N).Problem SolvingWe know that :
In my mind, I determined that the force will go to forward direction from the first person. So :
[tex] \sf{F_1} [/tex] = first person force = 200 N >> Because he is the frame of reference.[tex] \sf{F_2} [/tex] = second person force = -150 N >> Because he against the direction of the frame of reference (first person)What was asked :
[tex] \sf{\sum F} [/tex] = net force = ... NStep by step :
[tex] \sf{\sum F = F_1 + F_2} [/tex]
[tex] \sf{\sum F = 200 + (-150)} [/tex]
[tex] \sf{\sum F = 200 - 150} [/tex]
[tex] \boxed{\sf{\sum F = 50 \: N} [/tex]
ConclusionThe movement of the object is forward (from the first person) because the net force value that I calculated is not opposite (with negative sign) to the right direction. So, their net force on the object is 50 N to the forward direction from first person.
When the velocity of an object is doubled, its momentum.
Answer:
Doubled
Explanation:
Because it's velocity is constant
A trucker drives along a straight highway for 0.25 h with a displacement of 16 km south. What is the trucker’s average velocity?
helping me would b a big help ;)
The trucker’s average velocity who drives the truck along a straight highway is 64 km/h in south.
What is average velocity?Average velocity of a body is the ratio of displacement of a body in the given time. In case of average velocity, the displacement of the body is the same for each interval of time.
Average velocity can be calculated with the following formula.
[tex]\overline v =\dfrac{\Delta x}{\Delta t}[/tex]
Here, Δx is the displacement and Δt is the change in time. The average velocity can be positive or negative.
A trucker drives along a straight highway for 0.25 h with a displacement of 16 km south.
The displacement of the truck is 16 km in the south direction, and change in time to cover this distance is 0.25 hours. Thus, the average velocity of the truck is,
[tex]\overline v =\dfrac{16}{0.25}\\\overline v =64 \rm\; km-h^{-1}[/tex]
Hence, the trucker’s average velocity who drives the truck along a straight highway is 64 km/h in south.
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what are the two opposing forces that keep stars between collapsing and inflating?
What kind of elements tend to have higher ionization energies.
Two men pull on a 31-kg box with forces 8.3 N and 6.6 N in opposite directions.
Find the resultant acceleration of the box and the direction in which the box moves.
Please HURRY
Answer:
0.054m/s²
Explanation:
Here we are given that a 31kg block is being pulled by two men who apply forces of 8.3N and 6.6N in opposite directions .
So we know that ,
[tex]\sf \longrightarrow \boxed{\red{\rm F_{net}= \sqrt{F_1^2+F_2^2+2F_1F_2cos\theta }}}[/tex]
where [tex]\theta[/tex] is the angle between the forces .
Since the forces act in opposite directions , the angle between them will be 180° .[tex]\sf \longrightarrow F_{net}= \sqrt{ (8.3N)^2+(6.6N)^2+2(8.3)(6.6)(cos180^o)}\\ [/tex]
Value of cos 180° = -1[tex]\sf \longrightarrow F_{net}= \sqrt{ (8.3N)^2+(6.6N)^2+2(8.3)(6.6)(-1)}\\ [/tex]
[tex]\sf \longrightarrow F_{net}= \sqrt{ (8.3N)^2+(6.6N)^2-2(8.3)(6.6)}\\ [/tex]
RHS is in form of (a-b)² = a² + b² -2ab inside the square root .[tex]\sf \longrightarrow F_{net}=\sqrt{( 8.3N - 6.6N)^2} \\ [/tex]
[tex]\sf \longrightarrow F_{net}= 8.3N - 6.6N \\ [/tex]
[tex]\sf \longrightarrow \red{ F_{net}= 1.7N} \\ [/tex]
Now we know that ,
[tex]\sf \longrightarrow F_{net}= mass * acceleration \\ [/tex]
[tex]\sf \longrightarrow 1.7N = 31kg * a\\ [/tex]
[tex]\sf \longrightarrow a =\dfrac{1.7N}{31kg}\\ [/tex]
[tex]\sf \longrightarrow \underline{\boxed{\bf accl^n = 0.054 m/s^2}} \\ [/tex]
And the box will move in the direction of application of 8.3N force .A nickel and a sheet of paper, which have approximately the same mass, are dropped at the same time from the same height. The nickel will reach the ground first. Which statement best explains this result? (1 point) O The force of air resistance acts more strongly on the nickel than on the sheet of paper. O The force of gravity acts more strongly on the nickel than on the sheet of paper. The force of air resistance acts more strongly on the sheet of paper than on the nickel. O The force of gravity acts more strongly on the sheet of paper than on the nickel.
The statement which best explains why nickel will reach the ground first is: C. The force of air resistance acts more strongly on the sheet of paper than on the nickel.
What is gravity?Gravity can be defined as a force of attraction that controls the movement of objects and the planets such as Earth around the Sun.
The factors that affect gravity.Some of the factors that affect the force of gravitational attraction that is acting on an object or a physical body include the following:
MassDistanceAir resistanceGenerally, nickel will reach the ground first before a sheet of paper due to the effect of the force of air resistance because it would act more strongly on the sheet of paper than on the nickel.
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Which has more resistance a 12 volt or a 6 volt bulb?.
Answer:
12 volt
Explanation:
More volts=more resistance.
A stationary 25 kg object is located on a table near the surface of the earth. The coefficient of static friction between the surfaces is 0.50 and of kinetic friction is 0.30. A horizontal force of 300 N is applied to the object. Determine the acceleration of the object. *
The net vertical force on the object is
∑ F[vertical] = n - mg = 0
where n is the magnitude of the normal force exerted by the surface, m is the object's mass, and g is the mag. of acceleration due to gravity. It follows that
n = mg = (25 kg) (9.8 m/s²) = 245 N
The net horizontal force is
∑ F[horizontal] = 300 N - f = ma
where f is the mag. of friction and a is the object's acceleration.
We have
f = µn
where µ is the coefficient of friction. Since the object starts at rest, it won't move and accelerate unless the applied force of 300 N is sufficient to overcome the maximum static friction, which is
f = 0.50 n = 0.50 (245 N) = 122.5 N
Since f < 300 N, the box will begin to slide, at which point the coefficient of kinetic friction kicks in and the mag. of friction is
f = 0.30 n = 0.30 (245 N) = 73.5 N
Now solve for a :
300 N - 73.5 N = (25 kg) a
a = (226.5 N) / (25 kg)
a = 9.06 m/s² ≈ 9.1 m/s²
anyone help me please
A ball is thrown toward the ground. The figure shows the direction of the ball before it reaches the ground and the direction of the ball after it bounces off the ground. After the bounce, the ball leaves the ground with the same speed that it had before the bounce. The angle between the ground and the ball’s direction of travel is θ0 before and after the ball bounces off the ground. The positive directions are indicated in the figure. (a) Each grid below represents a component of the change in momentum of the ball as a result of the bounce. On each grid, draw a vector arrow to indicate the direction and relative magnitude of the change in momentum of the ball as a result of the bounce. If there is no change in momentum for a given component, write "NO CHANGE" under the corresponding grid. (b) A ball of mass M is released from rest at height H1 above the ground. After the ball reaches the ground, it bounces and travels to height H2 (about 1/2 of H1) above the ground, as shown in the figure. In a clear, coherent paragraph-length response that may also contain equations and drawings, explain, using the conservation of momentum and the conservation of energy, why H2
According to the principle of conservation of momentum, the momentum of the bouncing ball changes.
Also, the ball bounces less than its original height because some energy is lost due to heat, friction and air resistance.
How is momentum conserved in the bounce of balls?The principle of conservation of momentum states that for any collision occurring in an isolated system, momentum is conserved.
a. For a body such as a ball dropped from a height, the total momentum is conserved.
However, there is a change in momentum of the ball as some of its momentum is transferred to the earth.
b. When the ball a ball of mass M is released from a height H1, it bounces to a height H2, which is about 1/2 of H1.
The value of H2 is less than that of H1 because some of the energy is converted to heat energy due to friction and air resistance, thereby its energy is less than its original value.
Therefore, the momentum of the bouncing ball is changes. Also, the ball bounces less than its original height because some energy is lost due to heat, friction and air resistance.
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The great red spot is a gigantic storm located on which planet in our solar system?.
Blank can be considered to be mixtures of minerals
Answer: Igneous Rocks. Like Magma, it's a mixture of many minerals.
Explanation:
Lance arrives early at the airport (with flowers and balloons in hand) to welcome a friend. Her plane is delayed. While waiting, he notices that it takes 2 minutes 47 seconds to get down the hall if he stands on the moving sidewalk. While walking on the floor (not on the moving sidewalk), it took him 89 seconds. If he walks while on the sidewalk how long will it take him?
Answer:
A
Explanation:
Lance was never a bright young fella so he rolled down a hill and lost his left boot
Rommel draws a diagram to show the relative sizes of several parts of the universe. Which of
these is larger than a solar system, but smaller than the universe?
(25 Points)
O A. Comet
B. Galaxy
O C. Moon
O D. Star
The lower and upper
fixed points of a
mercury-in-glass thermometer are
marked X and 180mm respectively.
On a particular day the mercury
meniscus in the thermometer rises
to 60mm. If the corresponding
reading on a Celsius scale is 20°C,
what is the value of X?
Answer:
i don't understand
explain one more
The density of a block of wood is 2.7 g/cm and a mass of 583.3 g.
What is its volume?
A
0.5 cm
B
21.6 cm
с
216.0 cm
D
1574.9 cm
Answer:
C. 216.0 cm³
Explanation:
formula to solve this:Volume = mass ÷ density
Volume = 583.3 g ÷ 2.7 g/cm
Volume = 216 cm³
melissa drove 240 miles in 6 hours. what was melissa's speed in miles per hour?
Answer:
melissa drove with 60 miles per hour
Explanation:
240:6=60
A rocket initially at rest accelerates at a rate of 99. 0 meters/second2. Calculate the distance covered by the rocket if it attains a final velocity of 445 meters/second after 4. 50 seconds. A. 2. 50 × 102 meters B. 1. 00 × 103 meters C. 5. 05 × 102 meters D. 2. 00 × 103 meters E. 1. 00 × 102 meters.
The rocket will cover [tex]1 \times 10^3\rm \ m[/tex] distance in 4. 5 s. Acceleration can be defined as the change in velocity.
What is acceleration?
Acceleration can be defined as the change in speed or the direction of the object.
From kinamatic equation:
[tex]D = v_{t} +\dfrac 12at^2[/tex]
Where,
[tex]D[/tex] - final velocity = 445 m/s
[tex]v_0[/tex] - initial valocity = 0 m/s
[tex]a[/tex] - acceleration = 99. 0 m/s²
[tex]t[/tex] - time = 4. 50 s
Put the values in the formula,
[tex]D = 0\times ( 4.5) + \dfrac12\times (99)(4.5)^2\\\\D = 1002 {\rm \ m}\\\\D = 1 \times 10^3\rm \ m[/tex]
Therefore, the rocket will cover [tex]1 \times 10^3\rm \ m[/tex] distance in 4. 5 s.
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3
Select the correct answer.
Red blood cells are also known as
O A. Leukocytes
OB. Erythrocytes
OC. Hemoglobin
OD
Erythropoietin
Reset
Nel
