A wave with a frequency of 500 Hz is traveling at a speed of 100 m/s.what is the wavelength?

Answer:

biology, chemistry, and physics

Answer: Biology, chemistry and physics

Explanation: The natural sciences include;

physics; this is the study of physical quantity of matter such as length, time etc.

Chemistry; this is the study of the chemical composition of matter and other living and non living things. The chemical properties may include

Biology is the study of life. It is the Study of life existence.

the forces acting on an object is the net force or resultant force. ... Force is a vector and hence has both a direction and magnitude. For example, gravitational force (on earth) acts in downward direction and has a magnitude equal to mass of the object and acceleration due to gravity.

Answer:

Explanation:

The net force or resultant force is sum of all the forces act upon an object. As force is a vector quantity it has both magnitude as well as direction. so net force is calculated by keeping direction of application in mind such as friction force is always acts in the direction opposite to the motion of object and gravitational force always acts downwards.

Answer:

f = 6.912 E14 Hz

Explanation:

The speed of the wave is defined as

speed = wavelength*frequency

the frequency of the photon  is defined as

f = speed / wavelength

f = 3 E8 m/s / 434 E-9 m

f = 6.912 E14 Hz

Answer:

Frequency,  [tex]f=6.91\times 10^{14}\ Hz[/tex]

Explanation:

It is given that,

Wavelength, [tex]\lambda=434\times 10^{-9}\ m[/tex]

Speed of light, [tex]c=3\times 10^8\ m/s[/tex]

The frequency of photon can be calculated using following relation as :

[tex]c=f\times \lambda[/tex]

[tex]f=\dfrac{c}{\lambda}[/tex]

[tex]f=\dfrac{3\times 10^8\ m/s}{434\times 10^{-9}}[/tex]

[tex]f=6.91\times 10^{14}\ Hz[/tex]

So, the frequency of the photon is [tex]f=6.91\times 10^{14}\ Hz[/tex]. Hence, this is the required solution.

Answer:

Point c

Explanation:

The diagram shows that the liquid changes to a gas a the point c hope this helped :)

The Kepler laws of planetary motion are:

1) The planets revolve around the Sun following elliptical orbits, in which the Sun occupies one of the two focii

2) A line segment connecting the Sun with the center of each planet sweeps out equal areas in equal intervals of time --> this means that the speed of the planet changes according to its distance from the Sun: the closer to the Sun, the faster the planet

3) The square of the orbital period of the planets is proportional to the cube of the semi-major axis of the orbit. In formula

[tex]\frac{T^2}{r^3} = const.[/tex]

and the constant in the equation has the same value for every planet orbiting around the Sun.

Kepler's first law of planetary motion states that every planet orbits the Sun in an elliptical shape, with the Sun at one of the focal points of the ellipse. This law helps to calculate planetary positions with increased precision within the Copernican system.

One of Kepler's laws of planetary motion is his first law, which states that each planet moves around the Sun in an orbit that is an ellipse, with the Sun located at one focus of the ellipse. This concept emerged based on the careful analysis of precise data collected, revolving around the positions in the sky of all the known planets and the Moon. The elliptical orbits described in Kepler's first law is a fundamental rule which improved the calculation of planetary positions with great precision within the framework of the Copernican system.

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Answer:

More damage is done and more life is endangered in a head-on collision of two cars, each traveling at 30 mph, than in a  car crashing into a brick wall at 30 mph because the relative velocities of the head-on collision are the sum of the two velocities.

Explanation:

Car crashing to a brick wall at 30 mph is less dangerous than two cars travelling in opposite direction at 30 mph each.

This is because, for one car, the other is at a relative speed of 30+30 = 60 mph.

Answer:

the correct answer choice woud be C.  hope this helps :)

Explanation:  Mountain ranges that form close to a subduction zone are likely to experience volcanic activity.

Answer:

C) Volcanic activity.

Explanation:

When an oceanic plate is subducted ( brought underneath) under a continental plate, the sediments of seafloor which is rich in water and carbon dioxide are also brought under the plate .These elements act as flux reducing the melting point of magma  which comes out in the form of volcanic eruption.    

Answer: The Velocity Decreased

Explanation: e2020 answer

The magnitude of the final velocity for G1 + G2 will be less than any initial velocity because ; The velocity decreased ( A )

when the mass of an object on motion is increased by the addition of additional weight on the object, the velocity of the object on motion  will start to decrease  ( i.e. deceleration )  

Therefore the magnitude of the final velocity for G1 + G2 will be less than the magnitude of their initial velocities as they experience an increase in mass, respectively.

Hence we can conclude that The magnitude of the final velocity for G1 + G2 will be less than any initial velocity because ; The velocity decreased.  

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Answer:

The molecules in the gas would be completely stationary

Explanation:

The temperature of a gas is proportional to the average kinetic energy of its molecules, according to the equation (valid for an ideal monoatomic gas):

[tex]E_k = \frac{3}{2}kT[/tex]

where

[tex]E_k[/tex] is the average kinetic energy of the molecules

k is the Boltzmann constant

T is the absolute temperature of the gas

For a gas at 0 Kelvin, T = 0: this means that the average kinetic energy of the molecules is also zero. But this means that the motion of the molecules has completely stopped, so the molecules are completely still.

Answer:

B

250 watts.

Explanation:

The formula for wattage is

P = E * I

E = 10 volts.

I = 25 amps

P = 10 * 25

P = 250 Watts.

Answer:250

Explanation:

Electric power=IV

=25*10

=250Watts

Answer:

Synthesis reaction

Explanation:

Synthesis reaction: two or more compounds combine to form one.

A + B → C

Decomposition reaction: one compound forms two or more.

C → A + B

Single replacement reaction: an element in one compound is replaced with another element.

AB + C → AC + B

Double replacement reaction: elements in two compounds replace each other.

AB + CD → AC + BD

Answer:

B. Gravitational force

Explanation:

The gravitational force of an object (also called weight) is given by

[tex]F=mg[/tex]

where m is the mass of the object and g is the acceleration of gravity, and it always points in the downward direction.

In this problem, the arrow labelled with 4 is the only force pointing downward: therefore, it must be the gravitational force.

The other arrows represent:

1 --> component of the gravitational force parallel to the plane

2 --> force of friction

3 --> component of the gravitational force perpendicular to the plane

Answer:

8.7 x 10^3 is the correct answer.

Answer:

8.7 x 10^3  

I have no explanation, I just know that it is written as this

Answer:

-The object moves

-A force acts

Explanation:

(apex)

Projectile motion contains both horizontal and vertical motion.

Answer:Contains both Horizontal and Vertical Motions

Explanation:

Answer:

[tex]6.33\cdot 10^{-7} m[/tex]

Explanation:

The condition for the first minimum (= first dark fringe) in the interference pattern produced by diffraction from a double slit is

[tex]d sin \theta = \frac{\lambda}{2}[/tex]

where

[tex]d=0.33 mm = 0.33\cdot 10^{-3}m[/tex] is the separation between the slits

[tex]\theta=0.055^{\circ}[/tex] is the angle of the first minimum

[tex]\lambda[/tex] is the wavelength

Solving the equation for the wavelength, we find

[tex]\lambda = 2 d sin \theta = 2(0.33\cdot 10^{-3} m)sin 0.055^{\circ}=6.33\cdot 10^{-7} m[/tex]

Answer:

635.36J

Explanation:

The formulae to apply in this question is;

q=m*c*ΔФ  where q is the heat needed, m is mass,c is specific heat capacity and ΔФ is change in temperatures

Given that;

m=8 g

ΔФ= 19°C - 0°C= 19°C

c=4.18J/g.°C

Substitute values

q= 8×4.18×19 = 635.36J

Answer:

Answers are, A, B, C, and D

Answer:

its actually a,c & d  :) on edg

Answer:

20

Explanation:

Answer:

20 % of energy is wasted

Explanation:

If 100 joules of energy are used when 80 joules was needed, then 100 - 80 = 20 joules were wasted. Given that 100 joules are proportional to 100 % of energy used, then 20 joules is proportional to x %, therefore:

20 J/100 J = x%/100%

x = 20%

A person becomes a member of the power elite through influential positions in military, corporate, and political institutions, often facilitated by their education from prestigious universities and their wealth. These individuals exert control over critical decisions that affect the economy and policy-making. Their interwoven interests form a tight-knit group that maintains power and has the potential to challenge democratic values and create inequalities.

One becomes a member of the power elite by occupying dominant positions within the most powerful institutions of society, namely the military, corporate, and political sectors. Sociologist C. Wright Mills outlines this concept in his book The Power Elite, describing a small, interconnected group that wields significant influence and resources. These individuals tend to be highly educated, having often graduated from prestigious universities, and use their wealth and connections to control the nation's economy and secure key political positions that allow them to make decisions which benefit themselves or their interests.

According to Mills, the power elite influence or even directly control the decision-making processes of the government in such a way that they can shape policies to favor their positions. This is evident as the power elite often have overlapping roles in different sectors, such as corporate executives becoming political leaders or vice versa, creating a circulating elite that sustains its dominance. The dynamics among the power elite thus have profound implications not only for the United States but also for the global population, as their decisions can benevolently or adversely affect millions.

The influence of the power elite is also bolstered by their control over mass media, which serves as a means of propaganda to maintain their status and agenda. It's important to note, however, that members of this elite are also individuals driven by self-interest, which is a natural human trait. The concern arises when their concentrated political and economic power challenges the principles of democracy and leads to significant socioeconomic inequalities.

The Power Elite theory, as described by sociologist C. Wright Mills, refers to a small group of wealthy and influential individuals who hold dominant positions in society, consisting of government, big business, and the military.

This elite group makes decisions that benefit their own interests rather than those of the general population, often controlling economic and political aspects to maintain their power and influence.

Members of the power elite are typically highly educated, have political connections, and use their positions to influence policies and resource allocation to uphold their dominance within society.

Answer:

Anna is correct.

Explanation:

Anna is right as a satellite is in free fall because it keeps falling toward Earth, meaning that gravity is the only force acting on it. Tom is incorrect because an object does not have to accelerate at a certain speed to be considered to be in free fall. As long as gravity is the only force acting upon the object, it is considered to be in free fall.

From the conversation anna had with tom about the satellite in orbit, we can say that;

Anna is right because falling to the earth means being subject to only gravity which means a freefall.

       In physics, freefall is defined as a scenario whereby when an object is in motion, the only force acting on it is that due to gravity. This means that it is basically weightless and has no normal force acting on it

        Now, a satellite in orbit means that the satellite is accelerating towards the earth and as a result it would have an orbiting rate equal to the acceleration due to gravity. Thus, only force of gravity is acting on it.

         Now, Anna said that a satellite in orbit  is in free fall because it keeps falling toward Earth. From our earlier definition, she is correct because falling to the earth means being subject to only gravity which means a freefall.

Whereas, Tom is incorrect because he claims the object is not in freefall.

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The astronomer Edwin Powell Hubble observed several celestial bodies, and when obtaining the spectra of distant galaxies he observed the spectral lines were displaced towards the red (red shift), whereas the nearby galaxies showed a spectrum displaced to the blue.  

From there, Hubble deduced that the farther the galaxy is, the more redshifted it is in its spectrum. The same happens with the stars and this phenomenom is known as the Doppler effect.

This phenomenon refers to the change in a wave perceived frequency (or wavelength=color) when the emitter of the waves, and the receiver (or observer in the case of light) move relative to each other.  For example, as a star moves away from the Earth, its espectrum turns towards the red.

Answer:

they shift towards red

Explanation:

A P E X

A heat engine is a device that uses the transfer of heat energy to perform useful work, and it can be found in car engines and steam turbines.

A heat engine is a device that uses the transfer of heat energy to perform useful work. It extracts heat from a source and converts it into mechanical work that can be used for various applications. For example, a steam engine in an old-style train converts the heat energy from burning coal into the work needed to drive the train forward.

One of the important principles that govern the operation of heat engines is the second law of thermodynamics. This law sets a limit on the maximum percentage of the extracted heat energy that can be efficiently converted into work.

In summary, a heat engine is a device that utilizes heat transfer to produce useful work, such as car engines and steam turbines.

Final answer:

A heat engine is a device that converts heat into mechanical work, adhering to the principles of thermodynamics with limitations imposed by its thermal efficiency and the second law of thermodynamics.

Explanation:

A heat engine is a device designed to convert heat energy into mechanical work. This conversion is one of the fundamental processes in thermodynamics and is utilized in various applications. For instance, car engines, which are types of heat engines, use the heat generated from burning fuel to propel a vehicle. In another example, steam turbines that generate electricity use steam produced by heat to rotate blades and generate electricity. Such engines operate on cycles, where they repeatedly return to their original state by the end of each cycle. The thermal efficiency of a heat engine is determined by comparing the work output to the heat energy input; higher efficiency means more work is done with less wasted energy.

The operation of heat engines is governed by the laws of thermodynamics. The first law, also known as the conservation of energy, is applied to heat engines to ensure that energy is conserved throughout the process of converting heat to work. The second law of thermodynamics defines the limits of efficiency for these conversions by stating that not all absorbed heat can be transformed into mechanical work, as some energy is always lost, often as waste heat.

Answer: It doesn't because it's not that big.

Explanation:

Answer:

One characteristic of the moon of Earth is that it basically has no atmosphere. The Earth has an atmosphere rich in Nitrogen and Oxygen but on the moon the surface is directly exposed to outer space. There are three reasons why the moon has no atmosphere. The primary reason is because the moon is too small. Compared to the Earth, the moon is about 1/4th the size. This reduces the amount of gravity on the moon. Strong gravity is needed to hold an atmosphere into place. With weak gravity, gases that are emitted from the surface quickly are lost to outer space. Another reason is because the moon does not currently experience plate tectonics and geologic upwelling. Plate tectonics allows for a recycling of crust and convergence and divergence of plates occurs and this leads to volcanoes and gases escaping at the boundaries. The moon is said to be geologically dead. There are currently no significant processes that allow for abundant gases to supply an atmosphere. The early moon may have had an atmosphere when it was geologically active but the crust of the moon is currently “frozen” into place and thus there are very little gases being emitted as compared to Earth. Another reason is because the moon is relatively close to the sun. This reason is tied closely to the moon having weak gravity. The solar wind from the sun helps strip away a weak atmosphere. Earth and Venus do not suffer the same fate since the gravity is high enough to hold the atmosphere in place. There are other moons in the outer solar system that are better able to hold an atmosphere due to being further away from the sun among other reasons.  

Explanation:

Answer:

The bowling ball

Explanation:

The kinetic energy of an object is given by:

[tex]K=\frac{1}{2}mv^2[/tex]

where

m is the mass of the object

v is its speed

In the problem, all the balls have same speed v: so their difference in kinetic energy will depend on their mass only.

We don't know the exact masses of the balls, however we can assume that the bowling ball has the largest mass among them: therefore, the bowling ball will also have the greatest kinetic energy.

Answer:

The Second Law of Thermodynamics states that "in all energy exchanges, if no energy enters or leaves the system, the potential energy of the state will always be less than that of the initial state." This is also commonly referred to as entropy.

-- Take a straight ruler.

-- Lay it down with the 'zero' mark at the start point.

-- Rotate it around the start point until the end point is also touching the edge of the ruler.

-- From the marks on the ruler, read the straight-line distance from the start point to the end point.

-- Without moving the ruler, observe and write down the DIRECTION from the start point to the end point.

-- The Displacement is the straight-line distance and direction from the start point to the end point.

Displacement is the change in an object's position. It can be calculated simply as the difference between final and initial position. If using a velocity-time graph, calculate the area under the graph.

Displacement, in the context of physics, refers to an object's overall change in position. It is a vector quantity, meaning it has both magnitude (distance) and direction. The simple way to calculate displacement is by using the formula Ax = x₁ - x₀, where x₁ is the final position and x₀ is the initial position.

If you are dealing with a velocity-time graph, displacement can be found by calculating the area under the graph. For example, if your graph shows a rectangle and a triangle under the line, you will calculate the area of both and add them up to get the displacement.

In more complex situations that involve multiple displacements in different directions, you can draw displacement vectors on a scale (like 1 cm of vector length equals 1 m in the problem) and add them up to find the total displacement. Remember, direction is important in displacement calculation.

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Answer:

c

Explanation:

this equestion is about the safety

Answer: To minimize the chance the bracelet pulling over a test tube, causing a spill.

Explanation:

A chemistry lab is a laboratory where the potential hazards related to the chemicals may result if safety precautions are neglected. The chances of the cause of chemical splash, burns from chemicals or fire hazards can possibly  happen in a chemistry lab. The use of ornaments should be avoided in the chemical lab. Proper safety measures are to be taken to protect the body from chemical hazards by wearing close toed shoes, lab coat and gloves.

A dangling bracelet worn during the heating process is likely to spill off the acid solutions by pulling over a test tube. The test tube neck may get caught in the dangling bracelet. The test tube may collapse and break. Thus the dangling bracelet should be avoided during the process of heating.

Answer:

200 N

Explanation:

The crowbar is 2 meter, or 200 cm.  The effort arm is 160 cm, so the moment arm of the object is 40 cm.

(800 N) (40 cm) = F (160 cm)

F = 200 N