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.
Answer:
The crest of one wave overlaps the trough of another.
Answer:
The crest of one wave overlaps with the trough of another.
Microwaves travel at the speed of light, 3x108m/s. When frequency of the microwaves is 9x109 Hz, quantitatively translate this information into their wavelength and period. Wavelength= 0.03m; period 1.1x10-10s , , Wavelength= 0.03m; period 1.1x10 -10 s, Wavelength= 0.03m; period 1.1x10-10s Wavelength= 0.03m; period 1.1x10 -10 s, Wavelength = 0.03cm; period 1.1x109s Wavelength = 0.03cm; period 1.1x10 9 s, Wavelength=0.03m; period 1.1x1010s
Explanation:
Given that,
The frequency of microwaves, [tex]f=9\times 10^9\ Hz[/tex]
The time period of the wave is :
[tex]t=\dfrac{1}{f}\\\\t=\dfrac{1}{9\times 10^9}\\\\t=1.1\times 10^{-10}\ s[/tex]
Let [tex]\lambda[/tex] is the wavelength of the wave. We know that,
[tex]v=f\lambda\\\\\lambda=\dfrac{v}{f}[/tex]
Put all the values,
[tex]\lambda=\dfrac{3\times 10^8}{9\times 10^{9}}\\\\\lambda=0.03\ m[/tex]
Hence, this is the required solution.
a microwave with a frequency of 5.0 x 10^10 hertz has a period of
Answer:
A microwave with a frequency of 5*10¹⁰ hertz has a period of 2*10⁻¹¹ seconds.
Explanation:
Frequency is the number of vibrations that occur in a unit of time. Its unit is s⁻¹ or hertz (Hz).
The period is the time that elapses between the emission of two consecutive waves. In other words, it is the time it takes for a complete wave to pass a reference point. The period (T) is simply the inverse of the frequency (f):
[tex]T=\frac{1}{f}[/tex]
In this case, f=5*10¹⁰ Hz. So, replacing in the definition of period T:
[tex]T=\frac{1}{5*10^{10} Hz }[/tex]
Solving:
T= 2*10⁻¹¹ seconds
A microwave with a frequency of 5*10¹⁰ hertz has a period of 2*10⁻¹¹ seconds.
A microwave with a frequency of 5*10¹⁰ hertz has a period of 2*10⁻¹¹ seconds.
What is fequency?The fequency is defined as the number of cycles achieved by the any wave it is expressed in hertz.
Frequency is the number of vibrations that occur in a unit of time. Its unit is s⁻¹ or hertz (Hz).
The period is the time that elapses between the emission of two consecutive waves. In other words, it is the time it takes for a complete wave to pass a reference point. The period (T) is simply the inverse of the frequency (f):
[tex]T=\dfrac{1}{f}[/tex]
In this case, f=5*10¹⁰ Hz. So, replacing in the definition of period T:
[tex]T=\dfrac{1}{5\times 10^{10}}=2\times 10^{-11}\ Sec[/tex]
A microwave with a frequency of 5*10¹⁰ hertz has a period of 2*10⁻¹¹ seconds.
Thus a microwave with a frequency of 5*10¹⁰ hertz has a period of 2*10⁻¹¹ seconds.
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Answer:
The red car would experience the greatest acceleration.
Explanation:
Newton says that Force equals mass times acceleration or F = ma
We get a = F/m
If we want the greatest acceleration or a, mass or m must be the lowest.
Most consumers first spend their disposable income on what
Answer:
They first spend it on necessities.
If a plane traveling down a runway at 75 m/s accelerates at a rate of 8 m/s’over
40 seconds, then what is its final velocity?
Answer:
395 m/s
Explanation:
Initial velocity (u) = 75 m/sAcceleration (a) = 8 m/s²Time taken (t) = 40 secondsBy using the first equation of motion,
❖ v = u + atv denotes final velocityu denotes initial velocitya denotes accelerationt denotes time→ v = 75 + 8(40)
→ v = 75 + 320
→ v = 395
→ Final velocity = 395 m/sWhat process is represented by this redox equation ? 6H 2 O+6CO 2 C 6 H 12 O 6 +6O 2
Answer:
C. Photosynthesis
Explanation:
Photosynthesis is a process by which plants and photosynthetic bacteria obtain their food in presence of sunlight from water and carbon dioxide. They produce glucose as the food and oxygen is emitted as the byproduct. The equation for photosynthesis is - 6H2O+6CO2 → C6H12O6 + 6O2
Thus, the correct answer is 'C.Photosynthesis.'
Chang wants to build a circuit that will light up the bulb from a flashlight. Which component could Chang leave out and still light up the bulb? the switch the battery the wire the light bulb
We could choose to leave out the switch and simply join the wires together and the bulb will still light up.
What is a circuit?A circuit is defined as pathway that has been designed for the flow of current. Now we know that a circuit must have a battery, connecting wires and the bulb itself.
However, we could choose to leave out the switch and simply join the wires together and the bulb will still light up.
Learn more about circuit: https://brainly.com/question/365923
over due by alot please help
Answer:
i would say the third one
Explanation:
may i be brainliest?
Linus builds an electrical circuit with a battery and with wires that carry the current. As the battery weakens, the current also weakens. How does this affect the magnetic field around the wires
Answer:
When electric current weakens then the magnetic field around the wire also weaken
Explanation:
The magnetic field produced by electrical wire is directly proportional to the electricity flowing through it.
Thus, in case when electric current weakens then the magnetic field around the wire also weaken.
Answer:
The field gets weaker
Explanation:
took the quiz!
A spring has 100 J of EPE when it is stretched 2 m. What is the spring constant?
A. 100 N/m
B. 50 N/m
C. 200 N/m
D. 150 N/m
Answer:
B: 50 N/m
Explanation:
Hopes it help.
The spring constant of the spring is 50 N/m. The correct option is B.
What is spring potential energy?When the spring is compressed, it gets compressed up to its elastic limit. When load is removed from the spring, it regains its shape and obtains equilibrium position. The energy stored in this process is called as spring potential energy.
Given a spring has 100 J of EPE when it is stretched 2 m. The energy stored in the spring is given by
SPE = ½ kx²
100 = ½ k (2 m)²
k = 50 N/m
So, spring constant of the spring is 50 N/m.
Thus, the correct option is B.
Learn more about spring potential energy.
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Imagine that a 1200 kg vehicle speeds up from rest to 20.0 m/s in 80 m.
How much work was done on the car? (Answer in 3 sig figs)
Correct question:
Imagine that a 1200 kg vehicle speeds up from rest to 20.0 m/s in 80 s.
How much work was done on the car? (Answer in 3 sig figs)
Answer:
the work done on the vehicle is 2.40 x 10⁵ J
Explanation:
Given;
mass of the vehicle, m = 1200 kg
initial velocity of the vehicle, u = 0
final velocity of the vehicle, v = 20 m/s
time of motion of the vehicle, t = 80 s
The distance moved by the vehicle is calculated as;
[tex]s = (\frac{v + u}{2} )t\\\\s = (\frac{20+ 0}{2} )(80)\\\\s = 800 \ m[/tex]
The force applied to the vehicle is calculated as;
[tex]F = ma = \frac{m v}{t} = \frac{1200 \times 20}{80} = 300 \ N\\\\[/tex]
The work done on the vehicle is calculated as;
W = F x d
W = 300 x 800
W = 2.4 x 10⁵ J.
Therefore, the work done on the vehicle is 2.40 x 10⁵ J
name of impurities present in zinc plate used in simple cell.
Mercury is present in zinc plate which is used in simple cell
A.149 kg baseball moving at 17.7 m/s is caught by a 57 kg catcher at rest on an ice skating rink, wearing
frictionless skates. With what speed does the catcher slide on the ice?
Do NOT put in units or it will be marked wrong! The answer's value only! Please round each answer to 3 places.
MaVa + MbVb = (Ma+b)(Va+b)
Answer:
v = 12.8 m/s
Explanation:
Applying the law of conservation of energy:
[tex]m_1u_1+m_2u_2=m_1v_1+m_2v_2[/tex]
where,
m₁ = mass of baseball = 149 kg
m₂ = mass of catcher = 57 kg
u₁ = initial speed of ball = 17.7 m/s
u₂ = initial speed of catcher = 0 m/s
v₁ = v₂ = v = final speed of ball and the final speed of catcher = ?
both are same because ball is in hands of cathcer in the final state.
Therefore,
[tex](149\ kg)(17.7\ m/s)+(57\ kg)(0\ m/s)=(149\ kg)(v)+(57\ kg)(v)\\\\v = \frac{2637.3\ kgm/s}{206\ kg}[/tex]
v = 12.8 m/s
1.) A ball is thrown horizontally from the top of a building. What is the vertical velocity of the ball after 1 second?
A. 0 m/s
B. 9.8 m/s
C. 4.9 m/s
D. 19.6 m/s
2.) This is a required question
What is the horizontal acceleration of a projectile?
A. 0 m/s2
B. 8.9 m/s2
C. 4.9 m/s2
D. 9.8 m/s2
3.) If air resistance is neglected, at what angle a projectile must be projected to attain the maximum range?
A. 40
B. 75
C. 45
D. 90
4.) Neglecting air resistance, the range of a projectile projected at an angle of 20 degrees is the same as that of _______ if they were released with the same velocity.
A. 50
B. 70
C. 60
D. 80
5.) What do you call the motion of an object with constant acceleration?
A. circular motion
B. uniform motion
C. constant motion
D. uniformly accelerated motion
CAN SOMEONE PLEASE HELP ASAP. THANK U
Q.1 - V = u + at
u = 0, a = g = 9.8, t = 1
V = 0+9.8*1 = 9.8 m/s
Q 2- In horizontal position the velocity remains same hence a= dv/t, since change in velocity is zero the acceleration also equal to zero
Q.3- After neglecting the air resistance at 45° angle the maximum range is obtained.
let's prove, consider the range have maximum angle at θ, now range is given by
R = u²Sin2θ/g where sin2θ can we written as 2sinθ.cosθ.
Now the range value is directly proportional to the product of sin & cos of firing angle & this maximum value is obtained at 45°
Q.4 The range of two angle will be same if and only if they give 90° on addition.
20+x = 90,
x = 90-20 = 70°
Q.5 The motion with constant acceleration is known as uniformly accelerated motion.
Thanks for joining brainly community!
Answer:
B. 9.8 m/sA. 0 m/s²C. 45°B. 70°D. uniformly accelerated motionExplanation:
1.
u=0m/s
v=?
a=9.8m/s²
t=1sec
now
we have
v=u+at
v=0+9.8*1
v=9.8m/s
3.
angle is measured in sin and cos angle where maximum angle's value is gained by 45°
4.
we have
range
R=[tex]\frac{u²sin2\theta}{g}[/tex]
For
angle =20°
R1=[tex]\frac{u²sin2*20}{g}[/tex].......[1]
another angle be [tex]\theta[/tex]
R2=[tex]\frac{u²sin2\theta}{g}[/tex].......[2]
since R1=R2
By comparing we get
Sin40=Sin([tex]2\theta[/tex])
Sin(180-40)=Sin([tex]2\theta[/tex])
we
140=[tex]2\theta[/tex]
[tex]\theta[/tex]=70°
5. A new technique called adaptive optics allows astronomers to: a. change the eyepieces of their telescopes much more quickly than ever before b. compensate for changes in the Earth's atmosphere and achieve better resolution c. increase the aperture of their telescopes by connecting several telescopes d. change the region of the electro-magnetic spectrum in which their telescope is able to detect radiation e. use the observatory shop to make better eye-glasses for their graduate students
Answer:
b. compensate for changes in the Earth's atmosphere and achieve better resolution.
Explanation:
The adaptive optic is a technology that is used to enhance the application of optical system in reducing the impact from the incoming distractions. It is dine to reduce the optical abbrebrivation. It is also used for correcting the tip-tilt correction by using the segmented mirrors.A car moving with a speed of 20 m/s
applies brakes. What is the acceleration
of the car?
Explanation:
[tex]speed : U = 20 \: m {s}^{ - 1} \\ {V}^{2} = {U}^{2} + 2aS \\ 0 = {20}^{2} + (2 \times a \times S) \\ a = \frac{200}{S} \: m {s}^{ - 1} [/tex]
A bicycle with a mass of 100kg hit a wall at an acceleration of 4 m/s2, what is the force?
Answer:
400N
Explanation:
F= ma
F= 100 x 4
F= 400N
Which equation is true of an atom with no elctrical charge
A. Number of nutrons = number of protons
B. Number of electrons = number of neutrons
C. Number of neutrons = number of protons + number of electrons
D. Number of electrons = number of protons
Answer:
Atoms are composed of electrons (charge -1), protons (charge +1), and neutrons (no charge). So in a neutral atom the correct answer is "D".
The _____is a measure of the number of waves that pass a point in a given amount of time
Model A: Two sponge balls representing two atoms are soaked in water. You hold one ball, and your friend holds the other. Then you press the two balls together. As you press them together, water leaks out. What type of reaction does this model represent?
:) thnx, please don't just answer for points
Answer:
The type of reaction represented by the model is an;
Exothermic reaction
Explanation:
Exothermic reaction reaction is a reaction that involves the giving off of excess energy as heat and or light by two or more reactants during a chemical reaction due to the higher combined energy of the reactants compared with the product
The analogy are;
The sponge balls are the reacting atoms
The water is the energy which they contain
The water given off is the excess energy which the compound formed by putting together the two soaked sponge balls is unable to hold.
When the net force acts at right angles to an object’s motion, what does it do to the object’s motion?
a. it changes the object’s speed
b. it changes the object’s direction
c. it changes both the speed and direction of the object’s motion.
Answer:
B. It changes the objects direction
Which organs are involved in the process of delivering the digestive juices for the intestines?
Stomach
Esophagus
Gall Bladder
Liver
Pancreas
Answer:
The Liver, Pancreas and Gall Bladder are involved in the process of delivering the digestive juices for the Intestines
Explanation:
plsssss asappppppppp
Answer:
20 meters.
Explanation:
In the graph, the x-axis (the horizontal axis) represents the time, while the y-axis (the vertical axis) represents the distance.
If we want to find the distance covered in the first T seconds, you need to find the value T in the horizontal axis.
Once you find it, we draw a vertical line, in the point where this vertical line touches the graph, we now draw a horizontal line. This horizontal line will intersect the y-axis in a given value. That value is the total distance travelled by the time T.
In this case, we want to find the total distance that David ran in the first 4 seconds.
Then we need to find the value 4 seconds in the horizontal axis. Now we perform the above steps, and we will find that the correspondent y-value is 20.
This means that in the first 4 seconds, David ran a distance of 20 meters.
A change in state is considered a
A.
Chemical change
B.
Physical Change
C.
Element
D.
Density
[tex]\huge{ \mathfrak{ \underline{Áñswér: }}}[/tex]
A change in state is considered a :
[tex] \hookrightarrow { \mathbb{\: physical \: change}}[/tex]
[tex]\#TeeNForeveR [/tex]
A nucleus splits to form two or more smaller nuclei during which process?
A. Positron emission
B. Nuclear fission
C. Nuclear fusion
O D. Gamma decay
Answer:
nuclear fission
what is a material used to reduce or prevent the transfer of electricity, heat, or sound ?
Answer:
The material you're looking for is insulation.
Explanation:
It reduces and/or stops electricity waves, heat waves, and sound waves from going past.
If an external force and the frictional force are acting on a body, which is in rest on the floor and are equal and opposite, then the frictional force is _____
If an external force and the frictional force are acting on a body, which is in rest on the floor and are equal and opposite, then the frictional force is Static friction.
Can some one help me with this question its hard :( down below ill give brainliest
the light beam falls on the surface of the mirror at an angle of 50 ° and is reflected. What is the magnitude of the reflection angle of that fiber?
Answer:
The Magnitude of the angle of reflection equals that of Incidence from the Law of reflection
So its 50°.
Explanation:
Can someone please help meee!! >.<
One day, you went for a walk with your family on the beach. You noticed that there was a lot of trash and a large oil spill in the water. Please write in a long term paragraph.