To an observer on earth, the sun appears brighter than the star rigel because the sun is.

The force exerted by a magnetic field on a moving charge is called the Lorentz force. It is directed perpendicular to both the velocity of the charge and the magnetic field.

The magnitude of the force is given by the equation:

F = qvB

Where:

F is the magnitude of the force (N)

q is the charge of the particle (C)

v is the velocity of the particle (m/s)

B is the strength of the magnetic field (T)

The force acts to deflect the charge from its path. The amount of deflection depends on the strength of the magnetic field and the velocity of the charge. If the magnetic field is strong, the charge will be deflected more. If the velocity is high, the charge will be deflected more.

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Because it spirals inward, it slowly decreases its orbital radius. So so long as a satellite acts in a round orbit, it's velocity is inversely proportionate.

A satellite or synthetic satellite tv for pc is an object deliberately positioned into orbit in outer area. besides for passive satellites, most satellites have an energy technology system for device on board, including solar panels or radioisotope thermoelectric generators.

A satellite is a moon, planet or machine that orbits a planet or star. for example, Earth is a satellite because it orbits the sun. Likewise, the moon is a satellite tv for pc as it orbits Earth. commonly, the word satellite refers to a device this is released into space and movements around Earth or another frame in area.

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The two key pieces of evidence that support the Big Bang theory are the cosmic background radiation and the observed helium content of the universe.

What is the Big Bang?

The big bang explains the way the universe began. It states that the universe began as just a single point, then expanded and stretched to grow as large as it is right now. The term “Big Bang” was coined by the British astronomer Fred Hoyle in 1949.  Around 13.7 billion years ago, everything  condensed in an infinitesimally small singularity, a point of infinite denseness and heat.  Cosmic microwave background is the  electromagnetic radiation which  fills the universe that is a residual effect of the big bang 13.8 billion years ago.

The presence of hydrogen and helium helps scientists to universal expansion rate.

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The focal length of the lens is 100 cm.

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The radius of the circle is equal to 20m if the centripetal acceleration is 5m/s².

The centripetal force is perpendicular to the velocity in a circular motion. If the particles change their speeds in a circular motion then acceleration is produced and the acceleration from directing toward the center.

The mathematical Formula for the centripetal acceleration used:

a = v²/r

Where 'r' is the radius of the circle and a is the centripetal acceleration.

Given, the velocity of the ride, v = 10 m/s

The centripetal acceleration, a = 5 m/s²

The radius of the circle in which the ride is going on is :

r = v²/a

r = (10)²/5

r = 20 m

Therefore, the radius of the circle is equal to 20m.

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Use the equation v = v0 + gt = 0 + 9.80665 * 8 to find the final free fall speed (right before impact with the ground), which is 78.45 m/s.

To determine the velocity at impact, multiply the time by the acceleration caused by gravity. If the object hits the ground after 9.9 seconds, its velocity is

=(1.01 s)*(9.8 m/s2),

=9.9 m/s.

Initial velocity plus two times the acceleration times the distance equals final velocity. V is the speed right before collision. Initial velocity, or u, is 0 mph.

Gravity's acceleration, a, is 9.81 m/s/s.

Therefore, from the moment the projectile is thrown, through its highest point, and until just before it hits the ground, its acceleration is equal to the acceleration caused by gravity, or 9.81 meters per second per second.

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When the crests of two waves overlap, constructive interference takes place. The crests of the waves combine as they pass through one another to create a wave with a larger amplitude. When two troughs come into contact, the same thing may happen.

A phenomenon known as interference occurs when two waves merge by adding their displacements at each and every point in space and time to create a new wave that may have a larger, smaller, or same amplitude. The amplitudes are progressive if one of the waves' crests coincides with another wave's crest. The resultant amplitude would double if the two waves' amplitudes were equal. Remember that the square of the amplitude determines how much light there is in an area. Constructive interference happens where the lines—which represent the peaks—cross one another. In other words, when two waves are in phase, constructive interference happens. Destructive interference results when two waves are completely out of phase (a peak is situated in the middle of two waves).

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The intensity is 4400 w/m2 , strength of the microwave is 1820 V/m  and magnetic field strength is606.66× 10-8 T .

What is intensity?

The power transferred per unit area is known as the intensity or flux of radiant energy, where the area is measured on a plane perpendicular to the direction of the energy's propagation. It is measured in watts per square metre (W/m2) in the SI standard.

a.) Average intensity=I

I=P/A where, P= power

A= area of the circle

= π r2

As we are given the diameter and r= d/2 , so area= π d2/4

d= 16cm= 0.16 m

area = 3.14× (0.16)×2 /4 = 0.20

P= 880W

I= 880/0.2= 4400 w/m2

b.) I =0.5 c e0 Emax2

Where c = speed of light = 3 108 m/s

e0= 8.85×10-12

Emax= peak of electric field =√ 2I / c ×e0

= √2×4400/(3×108)×8.85 ×10 -12

⇒1820 V/m  

Bmax= peak of magnetic field strength

Bmax = Emax/ c

          ⇒1820/ 3× 108

          ⇒606.6 ×10 -8 T

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The Correct option is (c) .

NaCl , has the largest (most exothermic) lattice energy by applying Coulomb's law.

Using Columbus' law of electrostatics, we have

F = q₁× q₂ / r²

where F ---> attraction between oppositely charged particles

lattice energy: strength of bond between oppositely charged ions , depends on the distance between the centers of ions when they are packed into a crystal, and the bond strength can be determined by the lattice energy.

We need to know how the lattice energy is affected by the properties of the ions. The increase in lattice energy is two properties we usually focus on. As the ion charge increases, the lattice energy increases. Reducing the size of the ions increases the lattice energy. As the ion becomes smaller, the lattice energy increases. They are all ions. Cations have the same charge as all other cations. We can see the size of the ion. The smallest cation is the one Sodiam from other cations.

Hence, NaCl have largest lattice energy.

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Complete Question

Based on Coulomb's Law of electrostatic attraction of oppositely- charged species, which of the following chlorine-containing compounds would be predicted to have the greatest (most exothernic) lattice energy? a)KCI

b)CaCl₂

c) NaCl

d)MgCl₂

The speed of the  each of the car moving in the same direction with a relative velocity of 50 m/s is 30 m/s and 20 m/s respectively.

The relative velocity is defined as the velocity of an object with respect to another observer.

For both cars moving in the opposite direction,

Where:

From the question,

Given:

Substitute into equation 1

Also, for both cars traveling in the same direction

Given:

Substitute into equation 3

Solve equation 2 and 4 simultaneously,

Adding equation 2 and equation 4

Substituting the value of Va into equation 1

Hence, the speed of each car is 30 m/s and 20 m/s respectively.

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The density of the object will be 60 kg/m³.

Density of any object is a derived quantity as it is obtained from mass and volume. But, it is not a derived unit. So, it is not a derived unit of measure.

Density of a substance is a physical intensive property. It can not be considered as an chemical property. We can measure the density of a  substance without changing of its chemical composition or identities.

Density of a substance gives the idea whether the substance will sink or float. If the density of a substance is more as compared to the liquid, then it will sink. Otherwise it will float.

Density of an object is given by mass/volume.

Here,

mass = 30 kg

Volume = 0.5 m³

Density = 30/0.5 = 60 kg/m³

Therefore the density of an object having mass of 30 kg and volume of 0.5 m³ is given as 60 kg/m³.

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Answer:

If you wrap your right hand around the wire with your thumb in the direction of the conventional current (+ to -), your fingers will point in the direction of the magnetic field.

Note - The conventional current goes from a battery's plus terminal to its negative terminal in the external circuit. (the actual direction of the electrons travel from - to + in the external circuit)

The distance covered by Usain Bolt in meters is  1200 meter.

Speed is defined as the distance travelled or covered in a particular time period. Speed is a scalar quantity as it does not specify the direction of motion, whereas velocity is the vector counterpart of speed as velocity specifies the direction of motion of the object or body or anything concerned with the motion.

Speed is given by the equation,

speed= distance traveled/time taken --- equation(1)

so we can calculate distance from equation(1) as ,

distance traveled= speed × time taken --- equation(2)

here,

speed is given as 12 m/s and time taken is given as 100 seconds

Therefore from equation(2)

distance traveled = 12m/s×100s=1200m

that is , the distance covered by Usain Bolt is 1200 meters.

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Since the net force acts towards the right, the object would move towards the right and the acceleration would also be towards the right.

The term net force has to do with the actual force that acts on a body. We know that a force is a vector quantity and that a system of forces could act on an object.

When more than one force is acting on an object, it then follows that the object would remain at rest or in a state of uniform motion if the forces are balanced.

If the forces are not balanced, the object would move in the direction of the net force that acts on the body.

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The three types of energy transfer occurs in the oven as the soup is cooked is mentioned above.

There are three types of thermal energy transfer. They are:

Conduction is the heat transfer through physical touch. Convection is the heat transfer between fluid objects. Radiation is the transfer of heat energy by means of waves.

When the soup is cooked in the oven,

Therefore, the three types of energy transfer occurs in the oven as the soup is cooked is mentioned above.

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33 m, due west, is the worker's displacement from his truck.

The state of being displaced: the action or process of displacing. a storm that forced thousands of people to evacuate. Physics: the volume and weight of a fluid, such as water, that is moved by a floating object, such as a ship, of equivalent weight (see move sense 2a).

Replace, supersede, & supplant are some typical synonyms for the word "displace." Displace indicates an ousting and dislodging even if all of these terms imply "to put out of a customary or proper place and into the position of another." Thousands had been displaced by war.

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The lower the ph value the larger the concentration of hydrogen ions.

In chemistry, pH, historically denoting "potential of hydrogen", is a scale used to specify the acidity or basicity of an aqueous solution. Acidic solutions are measured to have lower pH values than basic or alkaline solutions.

A pH of 7 is neutral. A decrease in pH below 7 shows an increase in acidity (hydrogen ions), while an increase in pH above 7 shows an increase in alkalinity (hydroxyl ions). Each pH unit represents a 10-fold change in concentration.

The lower the ph value the larger the concentration of hydrogen ions.

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The acceleration of the car at 3.5 seconds is determined as 10 m/s².

option (D) is the correct answer.

The acceleration of the car is the change in velocity of the car with time.

Mathematically, acceleration is given as;

a = Δv/Δt

where;

a = (v - u) / (t₂ - t₁)

where;

a = (15 - 5) / (1.5 - 0.5)

a = 10 m/s²

The acceleration of the car at 3.5 seconds can be calculated by applying extrapolation method as shown below;

a = (v - u) / (t₂ - t₁)

where;

a = (35 - 15) / (3.5 - 1.5)

a = (20) / (2)

a = 10 m/s²

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The zeroth law of thermodynamic states that if two systems are in thermal equilibrium in equilibrium. with a third system, they are. with each other".

One of the four fundamental laws of thermodynamics is the zeroth law. It offers a stand-alone definition of temperature that excludes the second law's concept of entropy. Ralph H. Fowler created the law in the 1930s, many years after the first, second, and third laws had gained widespread acceptance.

According to the zeroth law, if two thermodynamic systems are in thermal equilibrium with one another and with a third system separately, then all three systems are in thermal equilibrium with one another.

The mathematical representation of thermodynamics depends on the zeroth law. It mathematically transforms the relationship between systems' thermal equilibrium into an equivalence relation, which can symbolize the equality of a particular quantity related to each system.

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The speed and direction of motion of particle B is 2v₀/3 m/s towards left.

Potential energy is stored electricity that relies upon the relative function of various elements of a device. Spring has more capacity energy when it's miles compressed or stretched. A metallic ball has greater potential energy raised above the ground than it has after falling to Earth.

Potential energy is the electricity held by using an object due to its function relative to other objects, stresses within itself, its electric-powered charge, or different factors.

K.E₁ + P.E₁ = K.E₂ + P.E₂

1/2Mv² + G/r² = 1/2Mv² + G/r²

1/2Mv² = 1/2mv²

v² = v²

Va = Vb

V = 2v₀/3 m/s towards left.

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Disclaimer:- your question is incomplete, please see below for the complete question.

Particle A and particle B, each of mass M, move along the x-axis exerting a force on each other. The potential energy of the system of two particles associated with the force is given by the equation U=G/r 2, where r is the distance between the two particles and G is a positive constant. The speed and direction of motion of particle B is?

Answer:

Explanation:

The answer to the question related to the time for two balls to reach the ground is option C, the two balls will reach the ground at the same time because the horizontal and vertical planes of motion are independent of each other, and they are also released from the same height.  

When a ball is dropped, knowing the height we could find the time with the following equation:

(1)

Where:

: is the final height

: is the initial height

: is the initial speed of the ball in the vertical direction = 0 (it is dropped)

g: is the acceleration due to gravity

When the ball is launched horizontally from the same height, we could find the time with equation (1) since the acceleration in the horizontal direction is zero and the initial velocity in the vertical direction is also zero.

The horizontal motion is related to the equation:

  (2)

We can notice in both cases that the ball is accelerated only by gravity.

Let's evaluate each statement

A) This statement is incorrect because the path is the same for both cases. The ball is dropped and launched from the same height.

B) This statement is also incorrect. The velocity of the dropped ball is the same as the velocity of the launched ball because the ball is accelerated only by gravity.

C) This statement is correct. We can see that we would get the same time in equation (1) since , , and  is the same for the dropped ball and the launched ball.  

D) This statement is incorrect. The nature of motion is related to a freefall motion in both cases.  

Therefore, the answer is option C.

To generate a larger emf with the bar magnet one should move the magnet faster through the coil and add more turns to the coil.

An energy transfer to an electric circuit per unit of electric charge, expressed in volts, is known as electromotive force in electromagnetism and electronics. Electrical transducers are devices that create an emf by transforming non-electrical energy into electrical energy.

A rectangular section of an object with permanent magnetic qualities that is formed of ferromagnetic material is known as a bar magnet.

A shift in magnetic flux is an induced EMF's most fundamental cause. Placing a coil that is constantly moving and conducting current in a magnetic field that is static and stable. EMF will be produced as a result of the area vector changing as a result of this.

You should have observed that the voltage peaked in one direction for moving the magnet in hand peaked in the other direction for moving the magnet out this is because according to Faraday's Law, a voltage is produced in a coil of wire when a magnet is moved inside of it, altering the magnetic field and magnetic flux through the coil. The galvanometer deflects to the left in the example below as the magnet is moved inside the coil in response to the growing field.

Hence, To generate a larger emf with the bar magnet one should move the magnet faster through the coil and add more turns to the coil.

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The astronomer on duty going to have a bit of a problem satisfying your astronomy reading friend's request because it becomes too cold and dark to emit visible light.

Long after a star turns into a white dwarf, it will become too cold due to no fusion of atoms happening in its core to provide any energy. The light emitted initially is due to the hotness before the fusion has stopped to take place.

The hotness eventually cools off due to surrounding temperature. As the temperature reduces the light emitted will also decrease. After it fully becomes cold it will stop emitting light and so it cannot be seen.

Therefore, the astronomer on duty going to have a bit of a problem satisfying your astronomy reading friend's request because it becomes too cold and dark to emit visible light.

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The combined mass of the cessna plane and the passangers, with a potential energy of 800 J is 0.041 kg.

Mass can be defined as the quantity of matter a body contains.

To calculate the combined mass of the cessna plane and passangers, we use the formula below

Formula:

Where:

Make M the subject of the equation

From the question,

Given:

Substitute these values into equation 2

Hence, the combined mass of the cessna plane and the passangers is 0.041 kg.

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It will take the 1.0 kg mass to fall 1.0 m is about 3.83seconds.

The push or pull on a massed object alters its velocity, which is the definition of force. An agent with the ability to change a body's resting or moving state is known as an external force. It has a magnitude and a direction.

Finding the force the rope in this situation applied to the 3 kg weight should be our first step.

Weight of 4kg mass = 4×9.8 = 39.2

Weight of 1kg mass = 1×9.8 = 9.8

The force acting upward on the 4kg mass will equal the weight of the 1kg mass. Thus the resultant force acting on the 4kg mass is:

Total force = 39.2 - 9.8 = 29.4 N (upwards)

Now find the acceleration:

F = m×a

29.4= 1×a

a = 29.4m/s²

We now apply the motion equation shown below to determine how long it takes to move one meter:

s = u × t + 1/2(a × t²)

1 = 0 × t +1/2(29.4 × t²)

t = 3.83seconds.

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Suppose each of the following objects could collapse into a black hole. Each black hole would have a sphere around it that is the limit for escape -- once you are inside this region, you cannot get away. An entire galaxy of stars would be this region that will be largest in diameter.

Strong magnetic field surrounding a black hole. A black hole is a very dense object whose gravity is so powerful that nothing can escape from it, not even light. The smallest speed at which anything needs move in order to escape the gravitational field of an object is known as the "escape velocity" for every object in space.

Most black holes are created from the remains of massive stars that explode in supernovae. Smaller stars eventually develop into dense neutron stars, which lack the mass necessary to confine light.

The discovery, which is slightly under 1,600 light-years away, raises the possibility that binary systems contain a substantial number of dormant black holes. The closest black hole to Earth so far has been identified as Gaia BH1, which may be seen in this artist's conception close to its Sun-like partner star.

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Activity 1 and Activity 3 both needed extra work than Activity 2, while Activity 3 did not.

When an object is displaced over a distance by such an external force, at least a portion of that force must be supplied in the directions of a displacement. This is known as work in physics. The quantity of force required to move a thing a specific distance is referred to as the work done.

Three categories can be used to classify the type of labor performed. Positive work, negative work, and zero work are the three types. The angle among force and displacement determines the kind of work that is done. Positive work occurs when a force is applied and an object is moved in that direction.

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The maximum braking force that can be applied to the car having a mass of 500kg is 8820 N

F= μN ( μ= Coefficient of static friction and N= max normal reaction of the car)

= 1.8 X 500g= 1.8 X 500 X 9.8= 8820 N

Alternatively known as brake power, the braking force describes the total amount of force applied to a moving body that causes it to slow down or come to a stop. Breaking force is the minimum force, expressed in pounds, at which a chain, wire cable, webbing strap, or end device breaks when a continuously increasing force is applied to it. For this force to be calculated correctly, the vehicle's body must be moving at a known, constant speed. If the car's wheels are still turning while it is braking, static friction is at work; however, if the wheels are locked and sliding over the road, kinetic friction is at work. The breaking stress or ultimate tensile stress is the highest amount of stress a material can withstand before breaking.

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The generation, consumption, conversion, and exchange of thermal energy across physical systems is the focus of the thermal engineering field of study known as heat transfer.

Despite mercury having a far higher heat conductivity than water, this doesn't really matter in this situation. Here, H represents the heat transmission. Then, a key factor in this situation is the particular temperatures of these compounds. Compared to mercury, water has a substantially higher specific heat. So, unlike how the temperature of mercury has changed, the temperature of water won't fluctuate as much. Since the mass of both substances is the same, the system's end temperature will be considerably closer to the water's initial temperature.

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