The frequency of a wave is the speed of the wave divided by its wavelength. The frequency of the wave travelling through at 2.6 m/s with the wavelength of 1.3 meters is 2 Hz.
What is frequency ?Frequency of a wave is the number of wave cycles travelling per unit time. It is the inverse of the time period thus has the unit of s⁻¹ which is equivalent to the unit Hz.
The frequency of a wave is inversely proportional to the wavelength of the wave. The speed of the wave is related to its frequency and wavelength as:
c = νλ
given, c = 2.6 m/s
wavelength, λ = 1.3 m.
then, frequency ν = c/λ
ν = 2.6 m/s / 1.3 m
= 2 Hz.
Therefore, the frequency of the wave is 2 Hz.
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do all questions 4, 5, and 6 please and thankyou
1. No, a portion of the innermost wave front shown in Figure 6 cannot be approximated by a plane wave because the wave front is curved, meaning that the wave does not travel in a straight line.
What is wave?A wave is a disturbance that propagates through a medium, such as air, water, or a solid material. Waves are caused by a source of energy, such as a vibrating tuning fork or a stone thrown into a pond. Waves can also be generated by seismic activity, such as earthquakes. Waves are characterized by their wavelength (the distance between two successive crests or troughs), frequency (the number of waves generated per unit of time), and amplitude (the maximum displacement of the medium from its equilibrium position).
2. In Figure 7, the source of the ripple waves is moving to the right.
3. If the source of the waves in Figure 7 is stationary, then the ripple tank must be moving to the left.
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Naci ( table salt ) is an example of a (n)
Salt, or NaCl, is an example of an ionic compound. Ionic compounds are formed when a metal combines with a non-metal through the transfer of electrons.
What are crystalline compounds?Crystalline compounds are compounds that have a well-defined, ordered, and repeating three-dimensional arrangement of atoms, ions, or molecules in a solid state. In a crystalline compound, the constituent particles are arranged in a highly ordered and repeating pattern called a crystal lattice.
In the case of NaCl, the sodium (Na) donates an electron to the chlorine (Cl), forming an ionic bond between them and resulting in the formation of an ionic compound. Ionic compounds typically have high melting and boiling points, are crystalline in structure, and conduct electricity when dissolved in water.
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find a magnitude and direction (the counterclockwise angle with the +x-axis) of a vector that is equal to a+b.
a: magnitude 27m direction 51°
b: magnitude 17m direction -6.5°
c: magnitude 19 m direction 0.0°
d: magnitude 27 m direction 39°
Magnitude and direction of a vector that is equal to a+b is 19m and 0.0° resp. Hence the correct option is C. magnitude 19 m direction 0.0°
What is Vector?`Vector is a mathematical quantity which has both magnitude and direction.
Vectors are denoted with usual notation with an arrow upon it. for example, Force, Displacement, Velocity and Acceleration etc. are the vectors which has both magnitude as well as direction.
When two same vectors are acting at a point in two dimension. The magnitude of resultant of this two vectors are given by,
R² = R₁² + R₁² +2R₁R₂cosθ......1
Where θ is the angle between them.
The direction of the resultant vector of two same vectors is given by the equation,
tanθ = (R₁ sinθ) ÷ (R₁ + R₂cosθ)......2.
In this picture, we have to find magnitude and direction of vector A+B, we have nothing to do with vector C.
vector A is at 37° from vertical, means 90-37 = 53° from positive x direction.
A = 12 m and 53°
B = 15m and 40°
angle between these two vectors are θ= 53+40 = 93°
magnitude of resultant of this two vectors are A+B which is given by the equation.
putting these values in equ. 1 we get,
R² = 12² + 15² +2(12×15)cos93°
R² = 350.15
R = 18.71 ≅ 19m ( magnitude)
From equation 2
tanα = (12 sin93°) ÷ (12+ 15cos93°)
tanα = 0.8337
α = 39.82° this angle is from vector B
so the angle of resultant from positive x axis is 40-39.82 = 0.17 ≅ 0.0°
Hence C is correct option is c: magnitude 19 m direction 0.0°
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A student places two horseshoe magnets next to each other, and the poles of the magnets attach to each other. How does the kinetic energy of the system change?
The kinetic energy of the system does not change.
When two horseshoe magnets are placed next to each other, then they either attract or repel each other, depending on the position of their poles. if the poles are opposite they attract, if they are same they repel with other.
In case, if the poles of two horseshoe magnets are attracted to each other, indicating poles are opposite to each other. when the magnets are brought together then the work must be done to oppose the magnetic field between poles. This increases the potential energy of the system.
However, the question is about the kinetic energy of the system, which is related to the motion of the objects in the system. In this case, once the magnets are brought together they attract each other, they will have zero potential. Therefore, the kinetic energy will not change.
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PLEASE HELP! DUE IN 30 MINS! 50 POINTS!The questions that were cut off at the bottom were: What rule of magnetism is illustrated by the lines of the iron filings in Step 12?
What rule of magnetism is illustrated by the lines of the iron filings in Step 15?
Why was glass or plastic used to separate the filings from the magnets in the experiments?
Did the glass or plastic stop the passage of the magnetic lines of force?
Did the iron filings almost or completely bridge the open end of the horseshoe magnet?
The lines of iron fillings will be attracted towards the poles of the magnet on the paper. The fillings gets sticked on the magnet. The glass or plastic will stop the passage of the magnetic lines of force .
What are magnetic field lines ?Magnetic field lines are lines of force generated by a strong magnetic field. For a bar magnet, the magnetic south pole and north pole are having stronger magnetic fields than the middle part.
When magnetically susceptible materials comes in contact with a magnet they gets attracted to the poles of the magnet. The fields lines of the material gets aligned parallel to the applied field.
Some materials such as paper and glass are not showing magnetic properties. Hence, they can stop the passage of magnetic field lines. If we place a glass or paper in between the poles of a two magnets, they will stick to the glass from both ends due to the attraction to the opposite pole.
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Blank provide us with the actual rocks from inside Earth. They are considered blank evidence of
Core samples provide us with the actual rocks from inside Earth. They are considered direct evidence of Earth's interior.
Rocks from the interior of the Earth are actually sampled via core samples. These are regarded as concrete proof of the interior of the Earth. Because they take a direct sample of the rocks that make up the layers that make up the Earth's surface and core, core samples provide clear proof of what is inside the planet.
Researchers can identify differences in weather patterns and climatic changes across time using geological core samples. Also, there may be proof of species, as well as the sedimentary make-up of lake and river beds, for instance. The dynamic character of the Earth's formation and how it changes through time are directly demonstrated by core samples. Where there are changes in the composition of the Earth can be determined thanks to seismic waves.
Seismograms can be used by geologists to determine the various components of the Earth's internal structure, such as which regions are solid, molten, or made of gases.
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Correct question is:
________ provide us with the actual rocks from inside Earth. They are considered ________ evidence of
why is it more difficult to steer a bike when your hands are close together on the handlebars than when they are far apart?
Answer:
When the hands are close together on the handlebars of a bike, the steering is more sensitive and requires more effort to make small adjustments. This is because the steering axis of the bike, which is an imaginary line passing through the center of the front wheel and the center of the steering tube, is shorter. This means that even small movements of the handlebars translate to larger changes in the direction of the front wheel.
On the other hand, when the hands are far apart on the handlebars, the steering is less sensitive and requires less effort to make adjustments. This is because the steering axis of the bike is longer, meaning that larger movements of the handlebars are required to achieve the same change in direction of the front wheel.
Overall, the sensitivity of the steering depends on the length of the steering axis, which in turn depends on the distance between the hands on the handlebars. Therefore, it is more difficult to steer a bike when the hands are close together on the handlebars than when they are far apart.
Explanation:
a red lady appears ___ in blue light
Which two statements describe force?
A. A force can be a push or a pull
B. Force cashes an objects motion to remain constant
C. Force is the ability to change an objects motion
D. A force can have mass or weight
Answer:
A. A force can be a push or pull
D. A force can have mass or weight
Answer question in photo
The work done on the box, given that it moves 6.50 meters horizontally when a force of 25.72 N is applied is 144.78 J
How do I determine the work done on the box?Work is defined as the product of force and distance moved in the direction of the force. This is given as:
Work done (Wd) = force (F) × distance (d)
Wd = fd
When certain angle projection is involved, the work done is given as
Wd = FdCosθ
The following data were obtained from the question:
Distance (d) = 6.50 mForce (F) = 25.72 NAngle (θ) = 30°Workdone (Wd) =?The work done can be obtained as follow:
Wd = FdCosθ
Wd = 25.72 × 6.50 × Cos 30
Wd = 167.18 × Cos 30
Wd = 144.78 J
In conclusion, we can say that the work done is 144.78 J
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The north and south poles of two magnets are attached to each other. A student pulls the poles apart and hold them at a distance of 10 cm. How does the energy stored in the system change?
A. Kinetic energy decreases because the magnets move in the opposite direction of the field.
B. Kinetic energy decreases, because the magnets move in the direction of the field.
C. Kinetic energy increases because the magnets move in the direction of the field.
D. Kinetic energy increases because the magnets move in the opposite direction of the field.
Kinetic energy increases because the magnets move in the opposite direction of the field.
What is magnets?A magnet is an object that can attract certain materials, such as iron and steel. Magnets have two poles, a north pole and a south pole, and they can attract and repel other magnets. When two magnets are placed near each other, their magnetic fields interact and the force of attraction or repulsion can be felt. Magnets can also pick up objects made of iron and steel, such as paper clips and nails. Magnets can be made of different materials, including iron, nickel, cobalt, and other alloys. Natural magnets are found in the earth and are known as lodestones.
When two magnets are pulled apart, their relative motion generates a magnetic field that opposes the original field. This increases the kinetic energy stored in the system.
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Answer:
b
Explanation:
A 0.14-kilogram baseball is thrown in a straight line at a velocity of 30 m/sec. What is the momentum of the baseball?
The momentum of the baseball will be "4.20 kg.m/s".
Given values are:
Mass,
m = 0.14 kgVelocity,
v = 30 m/sAs we know the formula,
→ [tex]Momentum=Mass*Velocity[/tex]
or,
→ [tex]P=mv[/tex]
By substituting the given values, we get
→ [tex]=0.14*30[/tex]
→ [tex]=4.20[/tex] [tex]kg.m/s[/tex]
Thus the above answer is correct.
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In a moving bus, a person who is near to the engine feels very warm. The method of heat transmission from the engine to the person is through
The method of heat transmission from engine to the person is through radiation.
What is heat ?Heat is a form of energy which is transferred between bodies having different temperature.
Here,
The person near to the engine feels very warm in a moving bus. This is because of the heat transfer from the engine to the person. Here the two bodies, the person and engine are not in contact and also there is no other medium to transfer the heat between them. So, the heat is transferred from the engine to the person through radiation.
Hence,
The method of heat transmission from engine to the person is through radiation.
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0.025 kg of water is fired from a water pistol with a speed of 230 m/s.
If the water pistol has a mass of 0.9 kg, what is the recoil speed of the
water pistol?
Show Your Work
The recoil speed of the water pistol, given that the mass of the water pistol is 0.9 Kg is -6.39 m/s
How do i determine the recoil speed of the water pistol?The following data were obtained from the question:
Mass of water (m₁) = 0.025 KgSpeed of water (v₁) = 230 m/sMass of water pistol (m₂) = 0.9 KgRecoil speed of water pistol (v₂) = ?The recoil speed of the water pistol can be obtained as illustrated below:
m₁v₁ = -m₂v₂
(0.025 × 230) = -(0.9 × v₂)
5.75 = -0.9v₂
Divide both sides by -0.9
v₂ = 5.75 / -0.9
v₂ = -6.39 m/s
Thus, we can conclude that the recoil speed is -6.39 m/s
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When you switched the direction of the voltage on the battery the magnetic compass needle moved. Which of the following is the best explanation for the movement of the compass needle?
A- The copper wire magnetized the compass needle.
B- The compass needle magnetized the copper wire.
C- The current in the wire produced a magnetic field.
D- The compass needle moved due to the Earth's magnetic field and was unaffected by the electromagnet.
The correct explanation for the movement of the compass needle when the direction of the voltage on the battery is switched is (C) The current in the wire produced a magnetic field.
What is voltage?Voltage, also known as electric potential difference, is a measure of the electric potential energy per unit of charge in an electrical circuit. It is the force that drives the flow of electric charge in a circuit. Voltage is usually measured in volts (V) and is represented by the symbol "V".
When an electric current flows through a wire, it creates a magnetic field around the wire. The direction of the magnetic field depends on the direction of the current flow.
This magnetic field interacts with the Earth's magnetic field and causes the compass needle to move. Therefore, as the direction of the current in the wire changes when the voltage on the battery is switched, the direction of the magnetic field around the wire also changes, causing the compass needle to move.
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2. Where a river flows from an area of hard rock to an area of soft rock, the softer rock may wear away, eventually forming a drop called a(n) __.
A. Oxbow lake
B. Waterfall
C. Gully
D. Delta
Where a river flows from an area of hard rock to an area of soft rock, the softer rock may wear away, eventually forming a drop called a waterfall. Thus, the correct option is B.
What is a Waterfall?A waterfall is a river or other body of the water's steep which fall over a rocky ledge into a plunge pool below. Waterfalls are usually also called as cascades. The process of erosion, the wearing away of the earth, plays an important part in the formation of waterfalls in the world.
Waterfalls are generally created when the riverbed changes suddenly from the hard rock to soft rock. Rapids are formed where a fast-flowing river quickly cuts downwards through the waterbed of hard and soft rocks, eroding the soft rock and leaving the hard rocks which are standing above the water surface.
Where a river flows from an area of harder rock to an area of the softer rock, the softer rock may wear away, and it eventually results into the formation of a drop called a waterfall.
Therefore, the correct option is B.
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A weight lifter does 1700.44 Joules of work to lift the barbell from the floor to a height of 9.90 meters.
How to solve for work done?To calculate the work done by the weightlifter, we need to use the formula:
Work = force x distance x cos(theta)
where force is the weight of the barbell, distance is the height it is lifted, and theta is the angle between the force and the direction of motion. Since the weightlifter is lifting the barbell straight up, theta is 0 degrees and cos(theta) is 1.
So, we have:
Work = 171.60 N x 9.90 m x 1
Work = 1700.44 Joules
Therefore, the weightlifter does 1700.44 Joules of work to lift the barbell from the floor to a height of 9.90 meters.
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A bullet of mass 10g traveling at a speed of 100m/s embeds itself into a block of wood of mass 1900g. Suspended by a string.
A) Determine the velocity of the block and bullet immediately after the impact.
B) What is the height the pendulum rises to after impact?
name five example of derived qualities
Answer: 1. Intelligence
2. Creativity
3. Leadership
4. Empathy
5. Resilience
Explanation: NOW READ ONE PIECE MY SON
I have a test on this tomorrow I don’t get any of it if you can show your answers so I can try and figure out how you did it please and thank you (Will mark BRAINLYEST)
Conversion of following units:
1. 946000000 mm= 946 km
2. 0.4m = 0.0004 km
3. 0.019m = 19 cm
4. 30,925,800 cm= 309.258 km
5. 0.002651 Lt.= 2.651 ml
6. 0.04854mm= 0.004854cm
What is Conversion of units?Conversion of units is defined as the conversion between different units of measurement for the same quantity by means of multiplicative conversion factors, which change the value of the quantity being measured without changing its effect.
For above given example,
1. 1 Pound= 0.453592kg
So, 200 pounds will equals to 9.07185kg
2. One quarter = 25 cents
13 quarters will have 325 cents.
3. 1 minute= 60seconds
1 hour= 60 minutes= 3600 seconds
1 day= 24hrs or 86400seconds
So, 3days= 259200seconds
4. 1 mile/hr.= 0.44704m/s
So, 30miles/hr.= 13.4112 m/s
Thus, Conversion of following units:
1. 946000000 mm= 946 km
2. 0.4m = 0.0004 km
3. 0.019m = 19 cm
4. 30,925,800 cm= 309.258 km
5. 0.002651 Lt.= 2.651 ml
6. 0.04854mm= 0.004854cm
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Find the current in the given cicular loop of circuit if the given voltage is 8
The current flowing through the battery is 46.67 A.
The first step is to calculate the equivalent resistance of the circuit, which includes the resistance of the loop and the internal resistance of the battery. Since the points P and Q are connected to the battery, they are effectively in parallel, so the equivalent resistance is,
1/R = 1/40 Ω + 1/0.5 Ω = 0.025 Ω
R = 40 Ω || 0.5 Ω = 0.024 Ω
The total current flowing through the circuit is given by Ohm's law, I = V / (R + r), where V is the voltage of the battery, r is its internal resistance, and R is the resistance of the loop.
Substituting the given values,
I = 24 V / (0.024 Ω + 0.5 Ω) = 46.67 A
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--The complete question is, A circular loop has a resistance of 40Ω. Two points P and Q of the loop, which are one quarter of the circumference apart are connected to a 24V battery, having an internal resistance of 0.5Ω. What is the current flowing through the battery.--
Would a flood plain form at point B? Why or why not?
Yes, the point B floodplain shape. Because the flat region next to the river, which continues until it reaches the neighboring sloping terrain, is the goal of producing flood fields.
These fields are often level areas of land close to rivers, which allows for easy flooding during rainy seasons. Flood damage is lessened by the comparatively low elevation of the flat ground. By establishing floodplains, we can lessen the likelihood of flooding and the devastation it causes.
A productive agricultural field that may be utilized to generate food and other resources, the level terrain also offers the perfect environment for growing crops.
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The question is -
Would a floodplain form at point B? Why or why not?
What is a large, rocky or metallic object that revolves around the sun?
Answer:
Asteroids
Explanation:
this is an asteroid because there is an asteroid belt close or so what close to the sun.
The __weight_________ of the glass of water on the table is its force.
Answer: inertia
Explanation:
he glass of water has inertia — it will not move unless a big enough force acts on it. The force in this activity pulling on the glass of water is the friction between the tablecloth and the glass.
Explain how you can use aspects of Newton’s second law to improve your car
what is the mass, Fnet and Fapp?
Mass is a measure of an object's inertia, or resistance to changes in its motion. It is measured in kilograms (kg).
What is Mass?Mass is a physical property of an object that measures the amount of matter it contains. It is measured in kilograms (kg) or in grams (g). Mass is different from weight, which is the measure of the force of gravity on an object. Mass is the same everywhere in the universe and is unaffected by gravity, while weight depends on gravity and can vary from place to place. Mass is an important concept in physics, as it is used to calculate energy, momentum, and other physical properties of an object.
Fnet (net force) is the sum of all the forces acting on an object. It is measured in Newtons (N).
Fapp (applied force) is the force that is applied to an object in order to change its motion. It is also measured in Newtons (N).
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Select all the correct answers.
The table represents the length of a spring when an object with mass is suspended from the spring.
Length (inches)
10
15
20
25
30
Mass (grams)
0
20
40
60
80
Select all the key features of this function.
A. The function has a y intercept at 10
B. The function approaches positive infinity as x approaches negative infinity
C. The function approaches 10 as x approaches infinity.
D. The function has a y intercept at 30
E. The function has a slope of 1/4
F. The function has a slope of 4
The function has a y intercept at 10 and the function approaches 10 as x approaches infinity.
The correct answers are A and C.
What is a function?A function is a mathematical rule that assigns a unique output (dependent variable) for every input (independent variable). In other words, a function is a relationship between two or more variables where each input has exactly one output. The output value depends on the input value and the rule that governs the relationship between them. A function can be represented as a graph, table, or formula.
From the given question above;
A. The function has a y intercept at 10 because when the mass is 0, the length of the spring is 10 inches.
C. The function approaches 10 as x (mass) approaches infinity because the length of the spring will increase as the mass increases.
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What is the formula for distance, time and acceleration to get to speed
The equations of motion are:
[tex]v=u+at\\v^2=u^2+2as\\s=ut+\frac{1}{2}at^2[/tex]
Hence, the formula for distance (or displacement (s) ), time (t), and acceleration (a) to get to speed (u), is:
[tex]s = ut+\frac{1}{2} at^2[/tex]
Block slides rightward on the floor toward an ideal spring attached to block , as shown. At time , block reaches the spring and starts compressing it as block also starts to slide to the right. At a later time, , block loses contact with the spring. Both blocks slide with negligible friction. Taking rightward as positive, which pair of graphs could represent the acceleration of block and the center-of-mass acceleration of the two-block system?
At this moment, the block will start to speed to the left as the spring starts to apply force on it.
What does the word "force" mean?The definition of force in physics is: The press or pull on a massed object changes its velocity. An agent with the ability to change a body's resting or active condition is known as an external force.
What in science is a force?The word "power" has a specific meaning in physics. Calling a force at this point a pressing or a pull is perfectly appropriate. A force does not "be in it" or "be contained by" an object. One thing experiences a force from another. Both biological things and inanimate objects can be considered forces.
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If a 100 kg car is moving at 5 m/s, does it have kinetic or potential energy? Calculate the energy.
Answer:
Kinetic energy with 1250 J of energy
Explanation:
Kinetic energy formula = [tex]\frac{1}{2}[/tex]m[tex]v^{2}[/tex]
Potential energy formula = mgh
Velocity is given so we'll use kinetic energy
[tex]\frac{1}{2}[/tex]*100*[tex]5^{2}[/tex] = 1250 J