What is the equivalent resistance of the circuit

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: 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:

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:

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

Answer:

The magnets are repealing from each other is because the poles are the same on the magnets so they are pushing away from each other.

Explanation:

Magnets can either attract or repel each other. A permanent magnet is an object that produces a magnetic field around itself. It is this field that enables them to stick to each other and to some types of metal. Specifically, they stick to ferromagnetic materials like iron and things that contain iron, such as steel

Explanation:

A magnet is defined as a bar magnet that produces a magnetic field which attracts or repel other objects.

A magnet has both a north pole and a south pole.  

As like charges repel each other and opposite charges attract each other. Similarly, like poles repel each other and opposite poles attract each other.

So, when south pole of a magnet comes in contact with north pole of another magnet then they will attract each other.

As the given image shows that magnets are away from each other this means that they are repelling each other.

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:

Unbalanced force is expected to cause a body to accelerate.

Explanation:

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.    

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.

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:

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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Answer:

-The object moves

-A force acts

Explanation:

(apex)

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

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:

B and D

Explanation:

The higher the voltage, the more current flowing and the better the magnetic field. Using a longer wire will result in more electric force around the nail, making it stronger.

The stronger electromagnet can be achieved using a high voltage than the actual.

Answer: Option B

Explanation:

The strength of the electromagnet depends upon the factors such as the current or voltage, then the number of coils present or the iron core. These all are directly influencing factors in respect to proportionality.

Out of the options given, using fewer coils will weaken the electromagnet. Using shorter nail will again weaken. Shorter wire would increase the strength. Therefore, the best suitable change is the use of higher voltage.

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:

Point c

Explanation:

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

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%

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:

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:

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.

-- 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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Projectile motion contains both horizontal and vertical motion.

Answer:Contains both Horizontal and Vertical Motions

Explanation:

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:

b) Rs.901  is the selling price

Explanation:

selling price = cost price+profit percentage/100 x cost price

cost price = 850

profit percentage = 6%

selling price = 850+6/100 x 850 = 901

soln 2

                              if 100 % = 850

therefore what about 106% = ?

106 x 805/100 = 901

ans = 901

if you need any clarification or more explanation pls do mention on the comment section.i would like to help more

Hope this helps and if it does mark as branliest answer thx

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.

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

22N to the right and 13N to the left

Forces are in opposite directions so you subtract the bigger force from the smaller force

Magnitude of force= 22N -13N

= 9N

net force direction is to the right