The gas cloud known as the Crab Nebula can be seen with even a small telescope. It is the remnant of a supernova, a cataclysmic explosion of a star. The explosion was seen on the earth on July 4, 1054 a.d. The streamers glow with the characteristic red color of heated hydrogen gas. In a laboratory on the earth, heated hydrogen produces red light with frequency 4.568�1014Hz; the red light received from streamers in the Crab Nebula pointed toward the earth has frequency 4.586�1014Hz.
Part A:
Estimate the speed with which the outer edges of the Crab Nebula are expanding. Assume that the speed of the center of the nebula relative to the earth is negligible. The speed of light is 3.00�108m/s.
Part B:
Assuming that the expansion speed has been constant since the supernova explosion, estimate the diameter of the Crab Nebula in 2004 a.d. Give your answer in light years.
Part C:
The angular diameter of the Crab Nebula as seen from earth is about 5 arc minutes (1arcminute=160ofadegree). Estimate the distance (in light years) to the Crab Nebula in 2004 a.d

When reggie stepped up to the plate and hit a 0. 150-kg fast ball traveling at 36. 0 m/s, the impact caused the ball to leave his bat with a velocity of 45. 0 m/s in the opposite direction. If the impact lasted for 0. 002 s, the force did reggie exert on the baseball is 6075 N.

The force can be calculate as follows:

assuming that the ultimate direction of motion is positive and the starting direction of motion before to impact is negative.

m = 0.15 kg, or the mass of the ball being struck

v0 is the ball's pre-impact initial velocity and is equal to 36 m/s.

45 m/s is the ball's final speed after impact, or v.

Time of Impact: 0.0020 seconds

Reggie's force on the ball was F.

Incorporating impulse-change into the momentum equation

F t = m (v - v₀)

F (0.0020) = (0.15) (45 - (- 36))

F = 6075 N

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The voltage in the secondary transformer will be 14.26V.

Primarily wound is always on the input side. The side connected to the voltage source is always on this side. Secondary windings are always the output side. Always connected to the load is this side.

Given, Power = 508 W

current in primary coil, i = 17A

number of turns in primary coil, N1 = 88

number of turns in secondary coil, N2 = 42

by using power formula, P = Vi voltage of primary coil can be calculated,

P = V1×i

508 = V1 × 17

V1 = 508/17

V1 = 29.88 V

now voltage of secondary coil, V2 = (N2/N1) × V1

V2 = (42/88)×29.88

V2 = 1254.96/88

V2 = 14.26 V

The voltage in the secondary transformer will be 14.26V.

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The steps to achieve a work-life balance, one should manage their time well, establish limits, pay attention to their health, and enjoy their work.

The state of equilibrium where a person equally priorities the responsibilities of their career and their personal life is known as work-life balance. Because both are significant, neither should be ignored. Common causes of a bad work-life balance include the following: expanded obligations at work. putting in more hours.

An ACAS analysis on work-life balance and flexible working shown how a poor balance can cause absences, poor productivity, and stress. Strict regulations, an excessive workload, a hostile work environment, deadline pressure, and a lack of job security are some organisational variables that interfere with work-life balance.

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After the collision, the two-cart system's total momentum was 0.22 kg m/s in magnitude. The correct answer is A.

To find the magnitude of the total momentum of the two-cart system after the collision, we can use the principle of conservation of momentum. This principle says that the total momentum of a closed system, like the two carts in this case, stays the same unless an outside force changes it.

First, calculate the initial momentum of the first cart:

Then, calculate the initial momentum of the second cart:

After that, we need to calculate the total initial momentum:

Use the principle of conservation of momentum to calculate the final momentum:

So the magnitude of the total momentum of the two-cart system after the collision is 0.22 kg m/s.

This question isn't complete. Here's how it should be written and how answer choices should be given: 

A 0.500-kilogram cart traveling to the right on a horizontal, frictionless surface at 2.20 meters per second collides head on with a 0.800-kilogram cart moving to the left at 1.10 meters per second. What is the magnitude of the total momentum of the two-cart system after the collision?

The correct answer is A.

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According to the NEC, a class 1 power limited circuit must be supplied from a source having a rated output of not more than 30 volts and 1000 volt-amperes.

NEC stands for National Electrical Code. It is a part of National Fire Protection Association (NFPA) of united states. NEC provides the standard and code for the safe installation of electrical wiring and equipment.

Class 1 power limited has a device that controls or regulates the current from the power source. This device prevents the overflow of the current in the circuit and thereby also prevents the short circuiting, overload, ground fall, etc.

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Yes it is important that the temperature of the surface important to apply a clear coat for G60 Galvanized tubing.

The end of a steel sheet (either hot- or cold-rolled) is sheared and welded to the preceding coil to form one continuous coil.A high-performance tension leveler is used to straighten the strip, resulting in excellent flatness.

The strip is dipped in an alkali bath and brushed for preliminary degreasing, and then undergoes alkaline electrolytic degreasing. This removes impurities on the material surface that could harm the zinc coating. The strip is then dipped in a acidic bath to activate the surface.

The zinc-coated strip is given various chemical treatments according to intended use, including phosphate treatment for excellent paintability, and chromate free special treatment for good corrosion resistance.

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The force of the car would be = 5000m/s²

Force is defined as the external push or pull that makes an object to move from one position to another.

Mathematically, force is defined as the product of mass and acceleration of a moving object.

That is, F = mass × acceleration

But acceleration= velocity/time

F = mass × velocity/time

mass = 1000kg

velocity = 30 m/s

time = 6 second

Force = 1000× 30/6

= 30000/6

= 5000 m/s²

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The phrase describes an activation of complex is (a) It is the potential energy required for a reaction to occur.

Activated complex is a process when reactant is interacted each other to form the product. Activated complex produce the highest energy in the chemical reaction because of its unstable atom activity and molecule reaction. To activated the activated complex, we need to a kinetic energy that is higher or equal to potential energy required for a reaction to occur. In short, activated complex is a process to change potential energy into kinetic energy in the reaction to create a product.

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Force and weight are related in that weight is a type of force. Specifically, weight is the force exerted on an object due to gravity. It is measured in units of force, such as newtons (N) or pounds (lb).

Weight is a scalar quantity, which means it has magnitude but no direction. It is determined by the mass of an object and the acceleration due to gravity.

The formula for weight is:

Weight = mass x gravity (W=mg)

On the other hand, Force is a vector quantity, which means it has both magnitude and direction. Force can be described as the push or pull on an object. It can be due to a variety of causes, such as friction, tension, or pressure. It is also measured in units of force, such as newtons (N) or pounds (lb).

So, to relate force and weight, weight is a force that acts on an object due to gravity, whereas force can be any kind of push or pull on an object, and weight is one of them.

To conclude, weight is a force that is exerted on an object due to gravity, while force is a more general term that can refer to any type of push or pull on an object. The key difference between the two is that weight is a scalar quantity while force is a vector quantity.

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When the object reaches the terminal velocity the object stops accelerating. Option B

The greater the objects surface area, the more air resistance it encounters. Option A

Terminal velocity is the maximum velocity an object reaches when falling through a fluid, such as air, due to the balance of gravitational force and fluid drag.

Surface area affects terminal velocity because a larger surface area results in greater fluid drag force, which slows the object's descent. A smaller surface area results in less fluid drag and a higher terminal velocity.

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According to the question, the answer of the given convert will be: 1.5 days = 36 hours, 5.2 ft = 1.58 m, 3600 s = 1 hr,10.2 m = 33.46 ft, 305 g = 0.305 kg, 180 pm = 0.18 m, 73 kg = 73000 g, 1,366 s = 22.77 min, 86,000 m = 86 km.

What is convert?

Convert is a term used to describe the process of changing one type of data into another. This could include changing a file format, changing a text document into a spreadsheet, or converting a physical document into a digital file. It is a useful tool in many industries and is often used to make sure that data is stored in a standard format, making it easy to access and use. Convert is used in a variety of settings, including media, accounting, and business. It is also used to help ensure data security and accuracy.

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Determine how much it would cost to heat a home's water for an hour every day for 60 days using a 2kW immersed rod at a rate of Rs. 1.50 per unit.

Why do you use the word "immersion"?

The act of totally coating something with a substance by dipping it into is called immersion. It could be literal—like diving headfirst into water—or metaphorical—like entirely giving yourself over to a task.

Why do we use immersion?

Answer and justification The resolution of a microscope is improved with immersion oil. It lessens the loss in light brought on by the specimen's refraction (light bending). When light passes through a different material, like a piece of glass

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After 5 days, the expected frequency of the wrinkly-spreader morphotype in the static (not shaken) microcosm will depend on the initial frequency of the morphotype in the microcosm.

The frequency of a repeated event is its number of instances per unit of time. Another name for it is temporal frequency, emphasizing how it differs from spatial frequency & angular frequency. The period is indeed the reciprocal of a frequency since it is the length of time for one cycle inside a repeating occurrence. For example: if a newborn baby's heart beats at a frequency of 120 times a minute, its period —the time interval between beats— is half a second. Frequency is an important parameter used in science and engineering to specify the rate of oscillatory and vibra tory phenomenon.

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The relationship between current and voltage across a circuit is directly proportional. It is given as per the Ohm's law. Thus, the correct option is D.

Ohm's law states that the current in an electric circuit through a conductor between the two points is directly proportional to the voltage across the two points of the conductor. Introducing the constant of proportionality, the resistance (R), where one arrives at the usual mathematical equation which describes this relationship:

I = V/ R

V = IR

where, I is the electric current flowing through the circuit,

V is the voltage of the electric circuit,

R is the resistance across the electric circuit

More specifically, the Ohm's law states that the R in this relation is a constant, which is independent of the electric current in the circuit.

Therefore, the correct option is D.

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Answer:

a: True centrifuge works on centripetal force.

b: False separating funnel can't be used to separate blood cells from samples.

e: False separating funnel cannot separate milk and water.

f: Condenser receives high pressure gas from the compressor and convert this gas to a liquid.

Conclusion statement defines the answer of a scientific problem based on the result of the experiment.

A scientific problem is solved by the scientific methods. A scientific method is the step-by-step approach to a conclusion of the problem. It may include the following steps.

Observation: It is the first step of the method. It is based on that how do you see the problem.

Hypothesis: It is the result you think that you will get.

Prediction: It is based on your scientific knowledge. If our hypothesis is correct than our prediction will also be true.

Experiment: It is the system or mechanism designed by you to test your hypothesis.

Conclusion: It is the final result based on the experiment of the method. This statement tells you whether your hypothesis is true or not.

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Answer:

Below

Explanation:

50 * 9.81 = 490.5 N     since there is no acceleration, climber must only overcome the accel of gravity

They are attractive forces between two permanent dipoles, or two induced dipoles.

A dipole is a type of electrical charge consisting of two equal and oppositely charged poles, or points of charge. The two poles are usually represented by a positive and negative sign. Dipoles are commonly found in molecules, atoms, and other types of particles, and are responsible for many of the physical and chemical interactions we observe in nature. Dipoles can also be created artificially with electrical equipment, such as in the case of an electric dipole antenna, which is used to transmit or receive radio signals. In a dipole, the two charges attract each other, which creates a field of force between them. The strength of this field depends on the distance between the two charges. Dipoles also exist in a magnetic form, in which the two poles have opposite magnetic poles and create a magnetic field.

This type of intermolecular force is a type of Van der Waals force and is much stronger than the London dispersion forces. They are responsible for most of the physical properties of polar substances, such as boiling points, melting points, and solubility.

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Answer:

Bbbbbbbbbbbbbb. bbbbbbbbbbbbbbb

The properties of water that makes it possible for life to continue to exist in lakes covered by a thick layer of ice for many months of the year are:

The correct option is C.

The water in frozen lakes supports life because of the following properties f water;

As soon as the water turns to ice, the ice loses a lot of its water-like density and continues to float on the lake's surface. Water loses density when it grows colder below 4° Celsius, forcing water that is about to freeze to float to the top.

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Answer:

The ratio of the mass of planet Zeb to the mass of Earth must be 8.

Explanation:

The gravitational acceleration on the surface of a planet is determined by the mass of the planet and its radius. The equation is g = GM/r^2, where G is the gravitational constant, M is the mass of the planet, and r is the radius of the planet.

If we assume that the gravitational acceleration on the surface of both planets is the same, we can set the equation for Earth equal to the equation for planet Zeb and solve for the ratio of the mass of planet Zeb to the mass of Earth.

g(earth) = GM(earth)/r(earth)^2 = GM(zeb)/r(zeb)^2

We know that r(zeb) = 2 * r(earth)

so,

GM(earth)/r(earth)^2 = GM(zeb)/(2*r(earth))^2

GM(zeb)/GM(earth) = (2*r(earth))^2 /r(earth)^2

GM(zeb)/GM(earth) = 4*4

GM(zeb)/GM(earth) = 16

So the ratio of the mass of planet Zeb to the mass of Earth is 16/1 = 8

Answer:

250 Newtons

Explanation:

To find the net force acting on the car, we can use the equation:

F = ma

Where F is the net force, m is the mass of the car and a is the acceleration.

We know that the mass of the car is 100 kg and the acceleration is (10m/s - 5m/s) / 2 seconds = 2.5 m/s²

So, the net force acting on the car is:

F = (100 kg) x (2.5 m/s²) = 250 N

Therefore, the net force acting on the car is 250 N

Translation is one of geometry transformation which is used to move a figure in any direction without rotation.

Transformation means changing a structure to increase, decrease or rearrange its elements. Meanwhile, geometry means a branch of mathematics that explains the nature of lines, angles, planes, and space.

Based on these two definitions, geometric transformations can be concluded as changes in the shape of a line, angle, space, and plane.

In everyday life, this geometric transformation is usually used to create works of art and architectural designs.

Translation or shift is a type of geometric transformation where there is a displacement or shift from a point to a certain direction in a straight line plane. As a result, every plane in the straight line will also be shifted in a certain direction and distance.

Translation basically only changes the position, not the shape and size of the field.

A simple example of translation is an event that occurs on a slide. Where the same person with a field changes positions from the starting point (start of the slide) and the ending point (end of the slide). Another example is a vehicle traveling on a straight road, from this incident it can be seen that the vehicle which is an object does not change size but only changes places.

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The given statement “A mechanical wave transmits energy through a vacuum” is false, because mechanical waves cannot move through areas of space where there are no particles because their energy transmission depends on particle contact.

Waves that are classified as mechanical waves require the presence of a medium in order for their energy to be transmitted from one place to another. This makes mechanical waves incapable of transmitting their energy through a vacuum. There are three distinct categories of mechanical waves: transverse waves, longitudinal waves, and surface waves. Mechanical waves have many interesting characteristics, but one of the most noteworthy is their measurement, which is given by displacement divided by wavelength.

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A balloon absorbs electrons from a wool fabric when it is rubbed against it, leaving the balloon with a negative charge and the wool with a positive charge.

Electrons from the atoms and molecules in your hair migrate to the balloon when you brush it against your head. The balloon acquires a negative charge thanks to the negative charge of electrons, but your hair retains a positive charge.

Electrons migrate from the hair or wool to the balloon when the balloon is rubbed against it. The balloon picks up a net negative charge because electrons have a negative charge. The can rolls because the positive charges in the can are drawn to the negative charges in the balloon.

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If something being dropped has a mass of 0.4 kg, and the height from the floor to the top is 15 m then 20J would be the change in PE.

The force acting on the two objects affects the potential energy formula. The formula for gravitational force is P.E. = mgh, where g is the acceleration caused by gravity (9.8 m/s2 at the earth's surface) and h is the height in meters.

Potential energy is a form of stored energy that is dependent on the relationship between different system components. When a spring is compressed or stretched, its potential energy increases. If a steel ball is raised above the ground as opposed to falling to the ground, it has more potential energy.

Given :        

Mass of the object  M=0.4 kg

Height up to which it is raised  h=5 m

Potential energy P.E=Mgh

g = 10 m/s^2

P.E= 0.4×10×5=20J

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20J would be the change in PE for a drop with a mass of 0.4 kg and a height of 15 m from the ground to the top.

The potential energy formula is impacted by the force operating on the two objects.

P.E. = mgh, where g is the acceleration brought on by gravity, h is the height in metres, is the formula for gravitational force.

Potential energy is a type of stored energy that depends on how various system elements interact with one another. A spring's potential energy rises when it is crushed or stretched. A steel ball has higher potential energy if it is lifted above the ground as opposed to falling to the ground.

Given:

M=0.4 kg, the object's mass

It is raised to a height of h=5 m.

Powerful potential P.E=Mgh

g = 10 m/s^2

P.E= 0.4×10×5=20J.

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Endothermic chemical reactions occur when the reactants take in heat energy from their environment to create products. A cooling effect is produced by these reactions because they cause their surroundings to become cooler.

The term "endothermic" refers to chemical reactions that either completely absorb or use energy. When bonds inside the reactants are broken, more energy is taken in than is released when fresh bonds form in the product lines. This is known as an endothermic reaction.

                                                                                                                                                                                                                                                                                                                              Examples of endothermic processes include photosynthesis, the evaporation of liquids, the melting of ice and dry ice, the cracking of alkanes, thermal decomposition, the oxidation of ammonium chloride in water, and many others.

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When going up a hill, the type of energy which a bicycle has is potential energy.

A potential energy is a stored energy which depends upon the relative position of various parts of a system. When it is compressed or stretched, a spring has more potential energy. Any object which is lifted from its resting position has stored energy because it has a potential to do work when released.

When going up a hill, a bicycle has potential energy. As we climb to get up the hill, we gain potential energy.

Potential energy is the stored energy in any object by virtue of its position or arrangement of parts. However, it is not affected by the environment outside of the object, such as air or height. On the other side, kinetic energy is the energy of an object's particles in motion.

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The force of gravity between the two objects is 1.33 x 10⁻¹⁰ N.

The force of gravity between the two objects is calculated by applying Newton's law of universal gravitation.

Fg = Gm₁m₂ / r²

where;

Fg = ( 6.67 x 10⁻¹¹ x 1 kg x 2 kg ) / ( 1 m )²

Fg = 1.33 x 10⁻¹⁰ N

Thus, the force of gravity is proportional to the product of the masses and inversely proportional to the square of the distance between them.

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