which of the following are the 2 postulates of relativity? (the other choices are consequences of relativity) a. the laws of nature are the same for all observers in uniform motion. b. the length of a moving object is not the same as when it is at rest. c. the speed of light is constant for all observers in uniform motion. d. two events that happen at the same time in one frame, can happen at different times in another frame. e. e

Distance covered while flying in north-east direction = 20.0 km

Distance covered while traveling in the east direction = 30.0 km

Distance covered while traveling in the north direction = 10.0 km

According to the figure,

Distance traveling from B to C,

tan 60° = BC / 20

BC = 20√3

Using Pythagoras' theorem,

Distance covered from A to C,

AC² = AB² + BC²

AC² = 40² + (40√3)²

AC² = 1600 + 4800

AC = √6400

AC = 80.0 km

Similarly, the Distance covered from C to E

CE² = CD² + DE²

CE² = 30² + 10²

CE² = 900 + 100

CE = √1000

CE = 10√10 km

Total distance covered from starting point

= 80 + 10√10

= 80 + 30.16

= 110.16 km

Answer:

Sustainable energy is essential to meet uncontrolled rising demand for energy, reduce pollution and shift to resources that can be used again and again.

Explanation:

Considering the Sustainable Goals floated by United Nation, it is essential for all countries to improve their score in all the SD goals.

One of the SD goal is to shift to sustainable energy.

Sustainable energy is essential from following three points

- Reuse of energy source again and again to outcome the fear of resource depletion

- Sustainable energy source shall ensure cleaner environment

- Sustainable energy sources are also essential to meet the rising consumption of energy with time all across the globe.

Some common examples are - Solar energy, Wind Energy, Energy from nuclear fuels etc.

An iron nail is drawn to the magnet's north pole and adheres to it. The iron nail becomes a conduit for the magnetic field lines. As a result, the side that becomes attached to the North Pole serves as the South Pole.

Is an iron nail more drawn to a magnet's north or south pole?

A magnet's strength is greatest close to its poles. Therefore, the magnet's two poles will attract the greatest amount of nails.

An iron nail is more attracted to which pole of a magnet?

Iron nails are magnetically inducted to acquire the opposite polarity when they are brought close to one end of a magnet. Since opposing poles are drawn to one another,

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Answer:

See the answers below.

Explanation:

In order to solve this problem we must use the principle of conservation of momentum and the amount of movement. Where the car moves to the left with a negative speed sign while the force of the collision will be taken to the right.

\(-m_{car}*v_{car1}+(F*t)=m_{car}*v_{car2}\)

where:

Vcar1 = velocity of the car before the collision = - 15 [m/s]

F = impact force [N]

Vcar2 = velocity of the car after the collision = 2.6 [m/s]

\(-(1500*15)+(F*t)=(2.6*1500)\\F*t=22500+3900\\F*t=26400[kg*m/s]\)

Where the product of force by Time is equal to the impulse caused by the collision.

\(And the force\\F = P/t\\F=26400/0.15\\F=176000[N]\)

Answer:

E = 85170 J (/ 85.2 kJ)

Explanation:

Take the latent heat of fusion of water be 334J / g.

From the equation E = ml,

E = energy required (unknown),

mass m = 255g,

latent heat of fusion l = 334J / g,

E = 255 x 334

E = 85170 J (/ 85.2 kJ)

Answer: happy Ramadan

Explanation: thanks

Answer:

A and C are 180 deg out of phase (opposite points on a 360 deg wave)

The two points on the periodic wave  which are 180 degrees out of phase are point A and Point C.

The two points of a wave is said to be out of phase when they show up or down motion at different times.

If a point on the wave, say (X) is reached to the maximum or minimum point before the other point. Then these two points are said to be out of phase.

Also, when the points are 180 degree apart from each other. Which means if a point is in the crest of the wave and other is on the through.

The diagram below shows a periodic wave. In this diagram,

Hence, the two points on the periodic wave  which are 180 degrees out of phase are point A and Point C.

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Eddy believes that aliens make him walk 2 miles every day from his house to the store. this is an example of Hallucinations.

Hallucinations are sensory impressions that come from the mind yet seem realistic. Every one of the five senses may be affected by hallucination. One could, for instance, hear a voice that nobody else in the area can hear or see of a fake image. When someone is hallucinating, they will perceive things in their brains that they believe to be real but are actually not. Only the mind can produce these ideas. These symptoms could be brought on by medical conditions like seizures or alcoholic use problems, drug side effects, or mental diseases. The perception of hearing, smell, touch, vision, or physiological sensations may all be affected by hallucinations. A person may have hallucinations with or without knowledge that they are hallucinations. It is regarded as a psychotic sign when someone believes their delusion to be genuine.

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Ideally in no air resistance, the ball will return to the thrower's hand with a speed of 10 m/s. Thus, the correct option is B.

Speed is the distance covered by an object with respect to time taken. It can also be defined as the change in the position of an object with respect to time. It is a scalar quantity as it has only magnitude and no direction.

The ball which is thrown straight upward in the sky with a speed of 10 m/s will return back to the thrower's hands with a speed of 10m/s in the ideal case of no air resistance because during this situation, no acceleration takes place. At the highest point, the velocity of the ball is zero however the ball is still under the influence of gravity, here the acceleration due to gravity is acting downwards on the ball.

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Answer:

in physics it means Milliampere

Here are a few. There are more. I always try to mean the one that is most appropriate in the moment:

MA Massachusetts (US postal abbreviation)

MA Mature Audiences (TV program rating)

MA Milliampere

MA Mildly Amused

MA Market America (independent entrepenurial corporation founded by James H Ridinger)

MA Master

MA Materials

MA Moving Average

MA Medical Assistance

MA Maintenance

MA Medical Assistant

MA Meta Analysis

MA Military Academy (West Point, NY)

MA Management Accounting

MA Microsoft Access

MA Move Along

MA Mannheim, Germany (license plate)

MA Manual (welding)

MA Mathematics

MA Mid-Atlantic (region; various organizations)

MA Metropolitan Area

MA Monoclonal Antibody

MA Manitoba

MA Morocco (ISO country code, top level domain)

MA Multiple Access

MA Madagascar (Malagasy)

MA Management Agent (metadirectory services)

MA Martial Artist (gaming, Anarchy Online)

MA Medicare Advantage

MA Mexican American (classification)

MA Management Analyst

MA Military Applications

MA Massive Attack (band)

MA Maranhao (Brazil)

MA Map Analysis

MA Million Years (geology)

MA Mission Accomplished

MA Marin Academy (California)

MA Mittelalter (German: Middle Ages)

MA Methamphetamine

MA Maranhão (Brazilian state)

MA Medical Advisor

MA Michael Alexander (jewelry)

MA Military Attaché (US Navy)

MA Mission Assurance (Homeland Defense)

MA Marijuana Anonymous

MA Maintenance Agreement

MA Multiple Award

MA Martha Argerich (pianist)

MA Mechanical Advantage (machines)

MA Management Activity

MA Measurement and Analysis (process area; Capability Maturity Model Integration)

MA Maanantai (Finnish: Monday)

MA Morbid Angel (band)

MA Master-at-Arms (military rating)

MA Martial Artist (gaming)

MA Maritime Administration

MA Member Association (various organizations)

MA Memetic Algorithm (evolutionary computing)

MA Maleic Anhydride

MA Management Accounts

MA Modified Atmosphere

MA Mental Age

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MA Mean Average (mathematics)

MA Metropolitan Area Network

MA Multi-Access

MA Magister Artium (Master of Arts)

MA Missed Abortion

MA Multimedia Authoring

MA Mission Area

MA Mandelic Acid

MA Modern Apprenticeship

MA Mobile Armor (Gundam series)

MA Mobile Assistant

MA Monitoring Agency

MA Major Arcana (Lineage 2 game armor set)

MA Medical Attendant

MA Mechanical Animals (Marilyn Manson album)

MA Mission Analysis

MA Microaneurysm (ophthalmology)

MA Metabolic Analyzer (US NASA)

MA Mass Analyzer

MA Molecular Absorption

MA Materials Analyst

MA Missed Approach

MA Military Assistant

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MA Maintenance Action

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MA Maître Auxiliaire (French: Adjunct Professor)

MA Missed Appointment

MA Medical Administrator

MA Minnehaha Academy (Minneapolis)

MA Motorcycling Australia

MA Mission Assignment

MA Masurium (element)

MA Mobility Agent

MA Multiple Answer

MA Managed Availability (computing)

MA Minor Arterial (State highway Information)

MA Minor Actinide

MA Maximum Allowance

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MA Main Assist (Everquest)

MA Middle Assyrian

MA Marshalling Area

MA Makarska, Croatia (license plate)

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MA Music Ant (online guide for music software)

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MA Mobilization Assistant

MA Merchandise Analyst (retail)

MA Maintainability Analysis

MA Maintenance and Adaptation (ATMF)

MA Mobile Allocation (PCS - GSM)

MA Manufacturing Approval

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MA Multi-Alert (system sensor brand name)

MA MediArchive (website)

MA Magical Alliance (gaming group)

MA MJU Alert (Hekimian)

MA Willys-Overland 1/4 Ton 4 X 4 Truck (1st Model of WWII Jeep)

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MA Makeshift Apathy (Michigan band))

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MA (USN Rating) Master-At-Arms

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We should position the metre scale along the item such that the zero mark of the metre scale aligns with one end of the object if we want to measure an object's length using metres. The length of the object will then be revealed by the reading on the scale's opposite end.

A foot or so distant or close enough to read a ruler, stand in front of a mirror. The 0 on a plastic ruler should be positioned in the centre of your pupil when you hold it vertically against the frame. The bottom edge of the lens, not the frame's edge, should be measured from the middle of your pupil. Keep track of each eye's height.

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If the orbital distance of earth was greater than its actual value, the parallax angle to nearby stars would be Higher.

Because of the inverse relationship between parallax angle and distance, the parallax angle decreases as the distance to the star rises.

The Earth's orbit around the sun. There are no two eyes that can accurately determine the distances to other stars. Instead, the starting point for these calculations is the Earth's orbit around the sun.

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The potential of the cube is 4.7 x 10^10 / a.

the formula for the potential is V = kQ / a

Q = 150,

a = side of the cube

Therefore, we get;V = (9 x 10^9) x 150 / aV

                                 = (9 x 10^9) x 150 / a

to 30% accuracy is given as V = 4.7 x 10^10 /a

The potential of the cube is 4.7 x 10^10 / a.

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27. The energy , in electronvolts, of an emitted photon when an electron transition from n=3 to n = 2 is  -1.89 eV.

28. The energy of this emitted photon in joules is -3.0278 x 10⁻¹⁹ Joules.

29. The frequency of the emitted photon is 4.572 x 10¹⁴ Hz.

30. The color of light associated with this photon is Red.

It is the number of oscillations per second of the sinusoidal wave.

Given is the Great Nebula in the constellation Orion consists primarily of excited hydrogen gas.

The electrons in the atoms of excited hydrogen have been raised to higher energy levels. When these atoms release energy, a frequent electron transition is from the excited n = 3 energy level to the n = 2 energy level, which gives the nebula one of its characteristic colors.

27. The energy of transition between n = 3 to n = 2 is

E = R h e (1/n₁² - 1/n₂²)    

where R = Rydberg constant and h = Planck's constant.

Substitute the values, we get

E = 1.0974 x 10⁻⁷ x 6.626 x 10⁻³⁴ x 1.6 x 10⁻¹⁹ (1/3² - 1 /2²)

E = -1.89 eV

28. Energy in joules can be obtained by multiplying  1.6 x 10⁻¹⁹ . So we have

E =  -1.89 eV x   1.6 x 10⁻¹⁹ J/eV

E =  -3.0278 x 10⁻¹⁹ Joules

29. Wavelength associated with the photon emitted is

1/λ = R (1/n₂² - 1/n₁² )

Substitute the values, we get

1/ λ  = 1.524 x 10⁶ /m

The frequency is related to the wavelength as

f = c/λ   where c = speed of light

f = 3 x 10⁸ x  1.524 x 10⁶

f = 4.572 x 10¹⁴ Hz

30. The color of light associated with the photon of calculated frequency is Red.

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According to Newton's third law of motion, the reaction force exerted by the air on the balloon is equal in magnitude but opposite in direction to the action force exerted by the balloon on the air.

Given that the magnitude of the action force (F_balloon) is -3 N, the magnitude of the reaction force (F_air) will also be 3 N. The negative sign indicates that the forces are in opposite directions, but when considering magnitudes, we ignore the negative sign.

Therefore, the magnitude of the reaction force of the air pushing on the balloon is 3 N.

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two blocks are fastened to the ceiling of an elevator. The elevator accelerates upward at 2.00 m/s^2.  The tension in each rope is equal to the sum of the weight of each block.

When the elevator accelerates upward, it exerts a force on the blocks equal to their combined weight plus the tension in the ropes. Since the blocks are fastened to the ceiling, they remain stationary relative to the elevator. Therefore, the net force on each block must be zero.

Let's consider two blocks with masses m1 and m2, fastened to the ceiling of the elevator. The tension in each rope can be determined by analyzing the forces acting on each block.

For the first block (m1), the forces acting on it are its weight (m1 * g) and the tension in the rope (T1). The net force on the block is given by the equation:

T1 - m1 * g = m1 * a

where g is the acceleration due to gravity and a is the acceleration of the elevator.

For the second block (m2), the forces acting on it are its weight (m2 * g) and the tension in the rope (T2). The net force on the block is given by the equation:

T2 - m2 * g = m2 * a

Since the blocks are connected to the same elevator, they experience the same acceleration (a). Therefore, we can set the two equations equal to each other:

T1 - m1 * g = T2 - m2 * g

Simplifying the equation, we find:

T1 - T2 = (m1 - m2) * g

Since the tension in each rope is equal, we can rewrite the equation as:

T = (m1 - m2) * g / 2

The tension in each rope is equal to the difference in the masses of the blocks multiplied by the acceleration due to gravity, divided by 2.

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The tension in each rope is 19.6 N.

To find the tension in each rope, we need to consider the forces acting on each block. Let's assume the masses of the blocks are m1 and m2, and the tension in each rope is T1 and T2, respectively.

For the first block (m1):

The net force acting on it is given by:

F_net = T1 - m1 * g,

where g is the acceleration due to gravity (approximately 9.8 m/s^2).

Since the elevator is accelerating upward, the net force on the first block is:

F_net = m1 * a,

where a is the acceleration of the elevator (2.00 m/s^2).

Setting these two equations equal to each other, we have:

T1 - m1 * g = m1 * a.

Similarly, for the second block (m2):

The net force acting on it is given by:

F_net = T2 - m2 * g.

Since the elevator is accelerating upward, the net force on the second block is:

F_net = m2 * a.

Setting these two equations equal to each other, we have:

T2 - m2 * g = m2 * a.

Now we have two equations with two unknowns (T1 and T2). We can solve them simultaneously.

From the first equation, we can isolate T1:

T1 = m1 * a + m1 * g.

From the second equation, we can isolate T2:

T2 = m2 * a + m2 * g.

Plugging in the values:

m1 = mass of the first block,

m2 = mass of the second block,

g = 9.8 m/s^2,

a = 2.00 m/s^2.

Assuming both blocks have the same mass (m1 = m2), we can simplify the equations to:

T1 = T2 = m * (a + g),

where m is the mass of each block.

The tension in each rope is 19.6 N when the elevator accelerates upward at 2.00 m/s^2, assuming both blocks have the same mass.

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Answer:

C. It redirects the force

Answer:

a)it increasing accelerates, constant acceleration, decreasing acceleration

b)6.66m/sec

Explanation:

b)speed=distance/time

Answer:

Explanation:

The time taken can be found by using the formula

\( t = \frac{d}{v} \\ \)

d is the distance

v is the velocity

From the question we have

\(t = \frac{3.5}{4.8} \\ = 0.72916...\)

We have the final answer as

Hope this helps you

Answer:

When an atom has an equal number of electrons and protons, it has an equal number of negative electric charges (the electrons) and positive electric charges (the protons). The total electric charge of the atom is therefore zero and the atom is said to be neutral.

Explanation:

An atom has an equal quantity of positive and negative electric charges (the protons and electrons) when its electron and proton counts are equal (the protons). Since the atom has a total electric charge of zero, it is referred regarded as being neutral.

The atom is the smallest unit of matter that may be divided without resulting in electrically charged particles. Additionally, it is the tiniest substance with features like chemical elements. The atom is therefore the basic building block of chemistry.

Examine different electron arrangements in the electron shells that surround an atom's nucleus.

Examine different electron arrangements in the electron shells that surround an atom's nucleus. The rest is made up of a cloud of negatively charged electrons surrounding a positively charged nucleus made up of protons and neutrons. Compared to electrons, which are the lightest charged particles in nature, the nucleus is small and dense.

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This means that the average magnitude of the force that sunlight exerts on a 0.2 m2 surface of a perfect mirror is 3.67 x 10^-6 N.

To find the average magnitude of the force that sunlight exerts on a 0.2 m2 surface of a perfect mirror, we need to use the formula for radiation pressure.

Radiation pressure is the force exerted by the electromagnetic radiation of a light wave on a surface. The formula for radiation pressure is P = I/c, where P is the pressure, I is the intensity of the radiation, and c is the speed of light.

In this case, the average intensity of the sunlight in Maricopa County is given as 1100 W/m2. We can use this value to calculate the pressure exerted by the sunlight on a 0.2 m2 surface of a perfect mirror.

First, we need to convert the intensity of the sunlight from W/m2 to N/m2, which is the unit of pressure. We know that 1 W/m2 = 1 N/m2, so the intensity of the sunlight is also 1100 N/m2.

Next, we need to divide the intensity by the speed of light, which is approximately 3 x 10^8 m/s.

P = I/c = 1100 N/m2 ÷ 3 x 10^8 m/s = 3.67 x 10^-6 N/m2
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Answer:

Convection

Explanation:

The method of heat transfer that occurs when particles move through a fluid is called convection.

Conduction is where heat is transferred from one substance to another through direct contact.

Thermal energy is the amount of heat that a substance has.

I hope this helps!

Answer:

Since kinetic energy is one of the forms of internal energy, the release of heat from an object causes a decrease in the average kinetic energy of its particles. This means that the particles move more sluggishly and the temperature of the object decreases.

Explanation:

Answer:

Heat vs temperature - Energy Education The core difference is that heat deals with thermal energy, whereas temperature is more concerned with molecular kinetic energy. Heat is the transfer of thermal energy, whereas temperature is a property the object exhibits.

We can see here that when a high operating kilovoltage is used, a. Low subject contrast; many shades of gray.

A dental image refers to a visual representation or picture of the teeth, gums, and surrounding structures in the oral cavity.

Dental images are typically captured using various imaging techniques and equipment to assist in the diagnosis, treatment planning, and monitoring of dental conditions.

A high kilovoltage setting produces an image with decreased or low contrast; the radiograph exhibits many shades of gray. This is because the higher energy x-rays are better able to penetrate tissue, resulting in less variation in the absorption of x-rays by different tissues.

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The outcome was a slope that was upwards. Heat is received at a rate that is inversely proportional to the quantity of heat lost.

Simply said, temperature is an object's heat or cold, and heat is the energy that moves from a hotter to a cooler thing. If you stick your thumb around a cup of coffee, it might feel warm to the touch, for instance. It is warm because the coffee's heat has been transmitted to the cup.

The transfer of energy at a high pace from an energy source to a medium or an object, or the opposite, is known as heat. These three techniques for transferring energy include radiation, conduction, and convection.

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