Answer:
The number of complete wavelengths in a given unit of time is called frequency (f). As a wavelength increases in size, its frequency and energy (E) decrease. From these equations you may realize that as the frequency increases, the wavelength gets shorter. As the frequency decreases, the wavelength gets longer.
Explanation:
please mark me as brainliest thank you
The number of complete wavelengths in a given time is called frequency (f). As a wavelength increases in size, its frequency and energy (E) decrease.
what is frequency ?The frequency referred to the number of oscillation per unit time and it is used for defining the cyclic process like rotation, oscillation, wave etc.
The SI unit is denoted as Hertz and the symbol λ represents it where one hertz means the wave completed one cycle in one second.
The frequency explains the phenomenon of oscillatory and vibration like the mechanical vibration, sound signals, light, frequency waves etc. The “period” represented as the time required by the wave for one oscillation, i.e., it is inversely proportional to the frequency.
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A satellite moves at a constant speed in a circular orbit about the Earth. Which pair of statements about momentum and kinetic energy are correct.
Answer:
The momentum and the kinetic energy remains constant.
Explanation:
A uniform circular motion is defined as the motion of a body which moves in a constant speed or at the same speed during the motion.
In the context, it is given that a satellite is moving around the earth in a circular orbit at a constant speed. The satellite has certain momentum as well as energy.
We can conclude that the kinetic energy and the momentum of the satellite remains constant as the momentum and kinetic energy depends on the speed of an object And here the speed of the satellite is constant, so the moment as well as the kinetic energy of the satellite remains constant while moving in a circular path.
The bouncing back of a ray of light , sound , or heat when the ray hits a surface that it does not penetrate
A . Refraction
B . Reflection
C. Resonance
D. Standing Wave
Answer:
B. reflection
Explanation:
Have a good day! :)
The bouncing back of a ray of light, sound, or heat when the ray hits a surface that it does not penetrate is called a reflection, so option B is correct.
What is Reflection?Reflection is the abrupt change in a wave's propagation direction when it encounters a boundary between two media. The approaching wave disturbance is still present in the same medium, at least in part. At plane borders, reflection happens regularly and follows a straightforward law.
Angles of incidence (between the oncoming wave's direction of motion and a perpendicular to the reflecting surface) are identical to angles between the reflected wave's direction of motion and a perpendicular (angle of reflection). Diffuse reflection occurs at uneven or irregular boundaries. The percentage of the wave's energy that is reflected by a surface material is known as its reflectivity.
Therefore, the bouncing back of a ray of light, sound, or heat when the ray hits a surface that it does not penetrate is called a reflection.
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All sound waves need a(n) _______________________________________ to travel through. 4. _____________________ and ___________________ can be used to describe a sound wave.
Answer:
Material medium
compressions and rarefactions
Explanation:
A sound wave is an example of a mechanical wave. All mechanical waves require a material medium for propagation. The medium for the propagation of sound is air. This is the reason why, if you cover your mouth, it will be difficult for another person to hear whatever you are saying.
Sound is also a longitudinal wave. Longitudinal waves are described in terms of compressions and rarefactions. Compressions refer to areas where air molecules crowd together while rarefactions refer to areas where the air molecules spread out.
Why should a person warm up before physical activity?
Answer:
don't wanna pull anything
Explanation:
A good warm-up before a workout dilates your blood vessels, ensuring that your muscles are well supplied with oxygen. It also raises your muscles' temperature for optimal flexibility and efficiency. By slowly raising your heart rate, the warm-up also helps minimize stress on your heart.
Answer:
Here you go!
Explanation:
A good warm-up before a workout dilates your blood vessels, ensuring that your muscles are well supplied with oxygen. It also raises your muscles' temperature for optimal flexibility and efficiency. By slowly raising your heart rate, the warm-up also helps minimize stress on your heart. “Stretching allows for greater range of motion and eases the stress on the joints and tendons, which could potentially prevent injury. Warming up, such as low-heart rate cardio, prepares the circulatory and respiratory system for the upcoming ‘age- and type-appropriate target heart rate’ exercising, whether it’s endurance or sprint type of activities.” The cool-down is just as critical. It keeps the blood flowing throughout the body. Stopping suddenly can cause light-headedness because your heart rate and blood pressure drop rapidly. Before you exercise, think about warming up your muscles like you would warm up your car. It increases the temperature and flexibility of your muscles, and helps you be more efficient and safer during your workout. A warm-up before moderate- or vigorous-intensity aerobic activity allows a gradual increase in heart rate and breathing at the start of the activity.
Tips:
*Warm up for 5 to 10 minutes. The more intense the activity, the longer the warm-up.
*Do whatever activity you plan on doing (running, walking, cycling, etc.) at a slower pace (jog, walk slowly).
*Use your entire body. For many people, walking on a treadmill and doing some modified bent-knee push-ups will suffice.
A beam of light of wavelength lambda = 541nm is normally incident on a diffraction grating which has 600 lines m * m ^ - 1 Determine the angle theta 2 at which the second order diffracted beam is seen.
Answer:
Angle of diffraction for second order maxima is θ = 18.941°
Explanation:
From the question it is given that
wavelength of incident light = λ = 541 nm = 541 x [tex]10^-^9 m[/tex]
order of maxima = n =2
diffraction grating has 600 lines per mm
⇒ distance between two slit is [tex]\frac{1mm}{600}[/tex] = 1.66 x [tex]10^-^6[/tex] m
using the relation of Braggs diffraction formula i.e.,
2dsinθ = nλ ..................................(1)
where, d = distance between two lines of grating
θ is the angle of diffraction
n= order of maxima
λ is the intensity of incident photon
on substituting the respected values in relation (1) we get,
2 x 1.66 x [tex]10^-^6[/tex]m sinθ = 2 x 541 x [tex]10^-^9 m[/tex]
⇒ sinθ = 0.3246
⇒ θ = [tex]sin^-^1(0.3246)[/tex] = 18.941 °
why is it possible for iron ships to float o water,but needles sink when dropped in water
Explanation:
Needles sinks in water due to the more density of needles than the density of water. But ship is made hollow and contains air. So it's average density Is less than that of water. It displaces the liquid of it's own weight causing the ship to float on water.
So, it it possible for iron ships to float on water,but needles sink when dropped in water.
Hope it will help :)❤
Twins Jody and Taylor are rearranging the furniture in their bedroom and want to move a dresser across the room. The dresser has a sliding force of 90N. Jody can push with a force of 55N and Taylor can push with a force of 38N. What is the Net Force? Can the twins move the dresser across the room? Explain why in complete sentences and show all math work to support your answer.
Plz help this is due in 5 days ;-;
Answer:
yes, They will be able to move the dresser.
Explanation:
sliding force 90N
55N + 38N = 93N
therefore, yes the twins can move the dresser
A 55.0 kg person, having a density of
1010 kg/m3, is underwater. What is the
buoyant force acting on the person?
[?]N
Pwater = 1,000 kg/m3
Answer:
534.7
Explanation:
55/1010 = 0.0545m^3
1000(0.0545)(9.81) = 534.7 N (kept at 4 sig figs)
Help please this is worth 30% of my grade in total
Answer:
D. Both are held together by gravitational forces
Explanation:
The common features in galaxies are;
Gravity holds the stars togetherThe dense region in a galaxy is the centerThey all have a faint outer region and mysterious dark matter haloThey all have stars, planets, asteroids, galactic cloudWhat would the products of a double-replacement reaction between Na2S
and MgF2 be?
A. NaF and MgS
B. MgF and Nas
C. F2S and MgNa2
D. MgF2 and Nas
Answer:
A. NaF and MgS
Explanation:
The reaction equation is given as:
Na₂S + MgF₂ → 2NaF + MgS
The product of this reaction is NaF and MgS.
In a double displacement reaction there is an actual exchange of partners to form new compounds. This reaction takes place between ionic compounds.
The driving force for the reaction is:
formation of an insoluble precipitateformation of water or any other non-ionizing compound liberation of a gaseous product.A planet's rotation determines the length of its day and its revolution determines the length of its year. A day on Earth is 24 hours and a year on Earth is 365 days. In contrast to Earth, a day on Venus is longer than a year on Venus. Which is the best reason for why this is so?
Explanation:
The speed of rotation of Venus is slower than that of Earth that is why a day on Venus is longerthan Earth's day. Whereas, Venus is closer to sun than Earth, this means Venus trajectory of revolution is smaller than that of Earth.Therefore, a year on Venus is shorter than Earth's year.
Dave runs a 400 m race with a speed of 4 m/s. What time will it take him to finish the
race?
Answer:
The answer should be 100 if not try 200
Explanation:
d=v x t
400m=4m/s x t
/4 /4
100=t
What is championship game of baseball called? The World Series The Super Bowl The World Cup
Answer:
The World Series
Explanation:
The Super Bowl is the championship American Football game, and the World Cup is the Soccer/Football game.
American Football and Football are different things. The first is what Americans call football, while the other is what Americans call soccer. It is confusing.
What kind of physical quantity is force?
a. Force is a scalar quantity.
b. Force is a vector quantity.
c. Force is both a vector quantity and a scalar quantity.
d. Force is neither a vector nor a scalar quantity.
Dentist description
If you want to make a flashlight and have two batteries and a light bulb how would you hook them up to make it bright and why?
Answer:
The positive end of battery 1 touching the negative end of battery 2 and wires connecting the negative of battery 1 to the light light bulb and the positive of battery 2 to the light bulb.
Explanation:
1 Newton = 1 ___?
A) kg*m/s
B)kg/m
C)m/s^2
D)kg*m/s^2
Answer:
D) kg*m/s^2
Explanation:
One newton is the force needed to accelerate one kilogram of mass at the rate of one metre per second squared in the direction of the applied force.
Johanna is studying what happens to the energy as a ball rolls down a ramp. What is one form of energy that she is studying? gravitational potential energy electrical energy chemical energy elastic potential energy
Answer: gravitational potential energy
Explanation:
Gravitational potential energy is refered to as the potential energy that an object has due to its gravitational field, which in turn is being turned into a kinetic energy when there is a fall of such objects.
Since Johanna is studying what happens to the energy as a ball rolls down a ramp, the form of energy here is the gravitational potential energy.
Answer:
the answer is A
Explanation:
gravitational potential energy
A sailboat started its journey at 6:30am and reached the destination at 6:30pm. If the distance of the journey was 144 miles, what was the sailboats average speed?___mph
Answer:
The sailboats average speed was 13 mph.
Explanation:
To calculate the speed of the boat first calculate the total ammountof hours it took the boat to get to its destination. Then divide 144 by that number which comes out to 13.
The average speed of the sailboat is determined as 12 miles per hours.
What is average speed?
The average speed of an object in motion is obtained by dividing the total distance traveled by the object with the time spent in the entire journey.
v = total distance/total time
where;
total distance = 144 milestotal time = from 6:30am to 6:30pm = 12 hoursv = 144/12
v = 12 mph
Thus, the average speed of the sailboat is determined as 12 miles per hours.
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HELP!!
8. The speed that the car is going at an instant of time is called the (5 points)
average speed
final speed
initial speed
instantaneous speed
Answer:
the speed that the car is going at an instant of time is called the instantaneous speed.
High- and low-pressure areas leading to air movement happen when there are differences in which factor?
clouds
density
atmosphere
precipitation
whoever gets the answer will get brainliest!! :D
Answer:
The answer is density
Explanation:
They density of the air is what makes a difference.
What do scientists hope to find? Why would that sort of thing be found inside Earth?
Answer:
Scientists will hope to find a lot of things. Such as lava, fossils, and landmarks.
Explanation:
i farted
I NEED HELP ASAP IM ON TIMER !!!!!!!!
Average speed and average velocity are always the same.
Please select the best answer from the choices provided
T
F
Average speed and average velocity are always the same.
Please select the best answer from the choices provided
T
F
Answer:
F
Explanation:
The average velocity is the ratio of total displacement and time.The average speed is the ratio of total distance and time.Therefore the average speed and average velocity are equal if the total displacement is equal to the total distance that is if the body travels along a straight line without changing the direction.
What’s the meaning of Density
Answer:
d= m/v
density is mass per unit volume.
Density describes how tightly packed particles are so if something is more dense the particles are going to be packed closely together and if something is less dense they will be looser and not as tightly packed.
How would the gravitational force between the earth and the moon change if the moon had half the mass?
The moon's gravity, combined with the waltz of Earth and the moon around their center of mass, forces the oceans into an oval shape, with two simultaneous high tides. ... If the moon were half its mass, then the ocean tides would have been correspondingly smaller and imparted less energy to it.
a boy pulls his toy on a smooth horizontal surface with a rope inclined at 60° to the horizontal if the effective Force pulling the toy along the horizontal surface is 5-newton calculate the tension in the rope
Answer:
The tension in the rope is 10 N
Explanation:
The Force Vector
Like all vectors, the force has a magnitude and direction. Vectors can be decomposed into two perpendicular components on both axes.
The tension in the rope (F) can be calculated by using vector decomposition as follows.
The figure included below shows a force F which horizontal component is known to have a value of Fx= 5 Nw. The angle formed by the force and its horizontal component is 60°.
We can use the trigonometric ratio called the cosine to find the magnitude of F as follows:
[tex]\displaystyle \cos 60^\circ = \frac{5}{F}[/tex]
Solving for F:
[tex]\displaystyle F = \frac{5}{\cos 60^\circ}[/tex]
[tex]\displaystyle F = \frac{5}{\frac{1}{2}}[/tex]
Thus, F = 10 N
The tension in the rope is 10 N
Which two types of potential energies would be types of mechanical energies? electrical and kinetic nuclear and chemical radiant and thermal elastic and gravitational
The two types of potential energies that would be types of mechanical energies are:
thermal elastic energy and gravitational energy.What is potential energy?The term potential energy is the energy possessed by a body by virtue of its position. It is different from kinetic energy which is due to the state of motion of a body.
The two types of potential energies that would be types of mechanical energies are;
thermal elastic and gravitational energy.Learn more about mechanical energy: https://brainly.com/question/1932868
Answer: D - elastic and gravitational
Explanation: Edge 2023
715 J of heat are transferred from
a 1.30 kg aluminum block to a
0.800 kg iron block. Find the
temperature change for the
aluminum
Aluminum
Iron or steel
c = 900 J/(kg*c)
c = 452 J/(kg"C)
(Unit = degrees C)
Answer:0.61
Explanation:
the answer is 0.61 because i just typed it into acellus abs it was right
3. Electrons are the only part of an atom that can be transferred between materials. True or
False?
Answer:
True
Explanation:
Electrons can be transferred between materials as in chemical reactions solid substances lose electrons while other elements gain electrons to balance the electrons in reaction.It occurs by conduction,polarization and friction.
velocity is vector quantity but speed is scalor quantity . why ?
speed speed scalar quantity is the rate of at which an object covers distance on the other hand velocity is a vector quantity it is direction aware.velocity is the rate at which the position changes.the average velocity is the displacement or position change Per time ratio.so velocity is a vector quantity but speed is a scalar quantity