Meteorologists can distinguish a cold from a warm front because a cold front occurs when a cold air masses --- whereas a warm front exists where a -----

Answer:

A hypothesis is an idea or explanation that you then test through study and experimentation.

Answer:an educated guess

The component form of the velocity of the airplane is approximately (-102.9 km/hr, 280.7 km/hr). This means the airplane is moving at approximately 102.9 km/hr to the west and 280.7 km/hr to the north.

To find the component form of the velocity of the airplane, we need to break down the given velocity into its horizontal and vertical components based on the given coordinate system.

Given that the positive x-axis represents due east and the positive y-axis represents due north, we can analyze the direction of the airplane's velocity, which is 20° west of north.

To determine the horizontal component, we consider the east-west direction. Since the velocity is west of north, it will have a negative horizontal component. Using trigonometry, we can calculate:

Horizontal component = 300 km/hr * sin(20°) ≈ -102.9 km/hr

For the vertical component, representing the north-south direction, we use the positive y-axis. Since the velocity is in the north direction, the vertical component will be positive. Using trigonometry, we can calculate:

Vertical component = 300 km/hr * cos(20°) ≈ 280.7 km/hr

Therefore, the component form of the velocity of the airplane is approximately (-102.9 km/hr, 280.7 km/hr). This means the airplane is moving at approximately 102.9 km/hr to the west and 280.7 km/hr to the north.

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1) neuron stars

2) centrifugal force

This question involves the concepts of charge and potential difference.

The net charge on the balloon is "2.6 x 10⁻⁸ C".

The balloon has a shape of a sphere. Therefore, the formula for the charge on the surface of a sphere can be used here, as follows:

\(V=\frac{Q}{4\pi \epsilon_o r}\\\\Q=4\pi \epsilon_orV\)

where,

Therefore,

Q = (4π)(8.85 x 10⁻¹² C²/N.m²)(0.15 m)(1560 V)

Q = 2.6 x 10⁻⁸ C = 26 nC

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Answer:

Explanation:

Answer:

mass of liquid = total mass - mass of container

m = 52000kg - 200kg

m = 519800

D = m/v

D = 519800/160

D = 3,248.75 kgm-³

One reason that electromagnetic waves are used in long-distance communication is, that they do not lose energy over long distances. So Option C   is correct

Electromagnetic waves are a type of wave that consists of oscillating electric and magnetic fields. They are propagated through space or through a material medium, and they have the ability to travel through a vacuum, which is the absence of matter. Electromagnetic waves have a wide range of frequencies, which determines the type of electromagnetic wave. The most familiar types of electromagnetic waves include radio waves, microwaves, infrared radiation, visible light, ultraviolet radiation, X-rays, and gamma rays.

One of the property of the electromagnetic waves is that they do not lose energy over long distances.

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Answer:

Explanation:

In this problem, we are going to solve for the average speed and average velocity for the entrire trip made by the dolphin.

Given data

speed v= 2 m/s

time t= 24s

the distance travelled by the dolphin is

speed= distance/time

distance= speed*time

distance= 2*24

distance= 48m

now the dolpine made a reverse and covered this 48m in 8s to return to it initial position

the speed it took is

speed= distance/time

speed= 48/8

speed= 6m/s

It average speed is the total distance divided by the total time taken

average speed= (48+48)/(24+8)= 96/32= 3m/s

average speed= 3 m/s

it average velocity is the sum of the initial and final velocity is divided by 2 to find the average

(2+6)/2= 8/2= 4m/s

average velocity is 4m/s

Answer:

First you take a hula hoop and hold it around your waist then you start moving your hips in a circle and let the hula  hoop go off your hands and you keep moving your hips. You keep moving your hips until you want to stop but it might fall. Just keep trying and you should get the hang of it in a few minutes.

Explanation:

The efficiency of a heat engine is the ratio of the work done by the engine to the heat input. So, if the efficiency of the heat engine is 60.0%, then 60.0% of the heat input is converted into work, and the remaining 40.0% is released into the environment.

Let's say that the heat engine takes in 100 J of heat. Then, 60.0 J of this heat is converted into work, and 40.0 J is released into the environment.

Therefore, the heat engine takes in 100 J of heat to produce 60.0 J of work.

Here is the formula for calculating the efficiency of a heat engine:

efficiency = work / heat input

In this case, the efficiency is 60.0%, the work is 60.0 J, and the heat input is 100 J. So, we can plug these values into the formula to get:

efficiency = 60.0 J / 100 J = 0.60

This means that the heat engine is 60.0% efficient.

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The Atwood machine lab is a simple machine used to demonstrate Newton's laws of motion. The machine consists of two masses connected by a string that passes over a pulley.

The pulley is an essential part of the Atwood machine because it changes the direction of the force acting on the masses. To ensure accurate results, the pulley should be as light as possible and nearly frictionless.

If the pulley is too heavy, it will contribute to the overall mass of the system and affect the acceleration of the masses. The weight of the pulley will also increase the tension in the string, which can lead to errors in the measurements.

A nearly frictionless pulley will reduce the effects of friction, which can cause inaccuracies in the measurements. Friction between the pulley and the string can cause the string to slip, which will affect the acceleration of the masses. A frictionless pulley will minimize these effects, making the Atwood machine more accurate and reliable.

In summary, a light and frictionless pulley is essential in an Atwood machine lab to minimize errors in the measurements and ensure accurate results.

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0.88m/s is the the acceleration when the girl is pulling the wagon at an angle of 36.9 degrees. She is pulling with a force of 50N and the boy is pushing with a force of 30N. The mass of the wagon and books together is 90kg.

A force is an influence that has the power to alter an object's motion. An object with mass can change its velocity, or accelerate, as a result of a force. An obvious way to describe force is as a push or a pull. A force is a vector quantity since it has both magnitude and direction.

The given data :

Pushing force by boy =30N

pulling force by Girl=50N

Mass of wagon and books together= 90kg

angle of pulling =36.9 degree

so the acceleration will be=F/m

hence net force =30+50N=80N

a=80/90

a=0.88m/s

Hence, 0.88m/s is the the acceleration when the girl is pulling the wagon at an angle of 36.9 degrees. She is pulling with a force of 50N and the boy is pushing with a force of 30N. The mass of the wagon and books together is 90kg.

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The diameter of Venus can be calculated using the angular size at inferior conjunction and its orbital parameters. With an angular size of 55" and a distance of 0.3 AU from Earth, the physical size of Venus can be determined.

The angular size of an object is the angle it subtends at the observer's location. In this case, the maximum angular size of Venus is given as 55" (arcseconds) during inferior conjunction. Inferior conjunction occurs when Venus is positioned between Earth and the Sun, and its distance from Earth is 0.3 AU (astronomical units). Venus is also stated to be 0.7 AU from the Sun.

To calculate the physical size of Venus, we can use the small-angle formula, which relates the angular size, distance, and physical size of an object. The formula is given by:

Angular size (in radians) = Physical size / Distance

Since the angular size is usually measured in arcseconds, it needs to be converted to radians. One radian is equal to 206,265 arcseconds.

Converting the given angular size of 55" to radians:

Angular size (in radians) = 55" / 206,265 ≈ 0.000266 radians

Using the small-angle formula, we can rearrange it to solve for the physical size:

Physical size = Distance × Angular size

Substituting the values, where the distance is 0.3 AU:

Physical size = 0.3 AU × 0.000266 radians ≈ 0.00008 AU

Finally, to convert the physical size from astronomical units to kilometers, we can use the conversion factor of 1 AU = 149.6 million kilometers:

Physical size = 0.00008 AU × 149.6 million kilometers/AU ≈ 12,000 kilometers

Therefore, the diameter (physical size) of Venus is estimated to be approximately 12,000 kilometers.

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Answer:

60kg

Explanation:

Ek =1/2 mv^2

Ek/0.5v^2 = m

270/0.5 x 3^3

=60kg

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The angle between the two vectors of the same magnitude would be 120 degrees to have the resultants the same.

answer: 120 degrees

Your answer:

150 kilometer's per hour.

Answer:

P.E.=600Nm

Explanation:

m=30kg

g=10m/s²

h=2m

P.E.=?

as we know that

P.E.=mgh

P.E.=30kg×10m/s²×2m

P.E.=600Nm

The magnitude of the constant horizontal force is 1830.4 N.

To find the magnitude of the force, we can use the equation:

                                               F = ma

Where,

F is the force,

m is the mass of the box and

a is its acceleration.

                           d = (1/2)at^2

where,

d is the distance,

a is the acceleration, and

t is the time.

Rearranging the equation gives:

                                      a = (2d) / t^2

Substituting the given values gives:

a = (2 * 96 m) / (2.1 s)^2

a = 20.8 m/s^2

Now we can use the equation for force to find its magnitude:

F = ma

F = 88 kg * 20.8 m/s^2

F = 1830.4 N

Therefore, the magnitude of the constant horizontal force is 1830.4 N.

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The distance from the axis of the force applied is 2.05 m.

The distance from the axis of the force applied is calculated as follows;

The formula for torque;

τ = Fr

where;

Another formula for torque is given as;

τ = Iα

where;

τ = (mr²)α

τ = (25 kg x (0.925 m)²) x (1.84 rad/s²)

τ = 39.36 Nm

The distance is calculated as;

r = τ/F

r = ( 39.36 Nm ) / (19.2 N)

r = 2.05 m

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Answer:

Explanation:

Energy is defined as the ability to cause changes in matter. The energy of moving matter is called kinetic energy.

Answer:

It applies to diverse phenomena

Explanation:

not sure if u need one, just ask if you do :D

Answer:

Being strictly geometric in its origin, the inverse square law applies to diverse phenomena. Point sources of gravitational force, electric field, light, sound, and radiation obey the inverse square law.

Explanation:

The long hand that is on the clock is minute hand and it Changes by seconds hand

During a warm summer day, a car became extremely hot. when a student went to open the car door, he burned his fingers. Radiation and conduction are the two forms of energy were responsible for the student burning his fingers.

As a mutagen, radiation has the potential to cause cancer in the long run. Radiation has the potential to kill cells or harm their DNA, which will impair their capacity to proliferate and may ultimately result in cancer. In the presence of radiation, your body is exposed to high-energy particles.

Particle vibrations are what trigger this kind of heat transfer in solid materials. A solid's particles start to jiggle, rotate, and vibrate when they are subjected to an energy flow, producing kinetic energy. Heating a skillet on a stove is a typical instance of conduction.

To cure a burn, apply cold, moist compresses or immediately immerse it in cool tap water. Once the discomfort has subsided, repeat this for another ten minutes. Every day, twice to three times, use petroleum jelly. Applying  toothpaste and ointments to a burn could result in an infection.

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Answer:

I think is the The truck because it has more mass

When the magnification of a compound microscope is increased from 10x to 100x, the field of view will decrease.

The field of view refers to the area or extent of the specimen that can be observed through the microscope. It is determined by the combination of the magnification and the size of the objective lens.

When the magnification of a compound microscope is increased, it means that the specimen is being enlarged more. As a result, the field of view becomes smaller because the microscope is focusing on a smaller area of the specimen.

Magnification is achieved by adjusting the objective lens of the microscope. By increasing the magnification from 10x to 100x, the objective lens is adjusted to provide a higher level of magnification, leading to a narrower field of view.

It is important to note that as the magnification increases, the level of detail and resolution also improve, allowing for a closer and more detailed examination of the specimen. However, the trade-off is a reduced field of view, which limits the area that can be observed at once.

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Using 3rd equation of kinematics

\(\\ \rm\longmapsto v^2-u^2=2as\)

\(\\ \rm\longmapsto s=\dfrac{v^2-u^2}{2a}\)

\(\\ \rm\longmapsto s=\dfrac{30^2-15^2}{2(5)}\)

\(\\ \rm\longmapsto s=\dfrac{900-225}{10}\)

\(\\ \rm\longmapsto s=\dfrac{675}{10}\)

\(\\ \rm\longmapsto s=67.5m\)

The statement is TRUE! The precise or specific location of an electron cannot always be known or determined, regardless of what we do.

We can only assume it exists somewhere. It is also known as the "electron cloud model." It demonstrates that we can find electrons by considering "the probability of being in a certain location."

One of the theories that I believe explains this strange physics is the Principle of Heisenberg's Uncertainty. This equation describes electron wave-particle duality.

The peculiarities of the quantum realm have been repeatedly demonstrated. Knowing more means admitting that we know less.

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Answer:

0.16 Hz

Explanation:

frequency = speed/wavelength

= 20/125 = 0.16 Hz

The conversion of gas into liquid happens due to condensation.

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The cross-price elasticity between crossing the Golden Gate Bridge and riding the ferry is negative, indicating that the two goods are substitutes.

Cross-price elasticity measures the responsiveness of the quantity demanded of one good to a change in the price of another good. In this case, when the toll to cross the Golden Gate Bridge increases by 20%, the demand for ferry rides across San Francisco Bay is expected to increase. This indicates that the two goods, bridge crossing and ferry rides, are substitutes for each other.

A positive percentage change in price for the Golden Gate Bridge toll leads to a greater percentage change in demand for ferry rides, suggesting that consumers are willing to switch from using the bridge to taking the ferry when the price of crossing the bridge becomes relatively more expensive.

The specific magnitude of the cross-price elasticity can only be determined with precise numerical values for the percentage changes in price and quantity demanded.

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The toll to cross the Golden Gate Bridge increased by 20%, and rides on the ferry to cross San Francisco Bay increased by 60%. The cross-price elasticity between crossing the Golden Gate Bridge and riding the ferry is 3 and the bridge and the ferry are substitute.

The toll to cross the Golden Gate Bridge increased by 20 percent.

Rides on the ferry to cross San Francisco Bay increased by 60 percent.

Cross-price elasticity is calculated as:

Cross-price elasticity = (Percentage change in quantity demanded of one good) / (Percentage change in price of the other good)

Let's figure out the percentage changes in both amount demanded and price for each scenario:

The Golden Gate Bridge should be crossed by:

Percentage change in quantity demanded of crossing the bridge = 0% (since the information about the change in quantity demanded is not given)

Percentage change in price of crossing the bridge = 20%

For riding the ferry:

Percentage change in quantity demanded of riding the ferry = 60%

Percentage change in price of riding the ferry = 0% (since the information about the change in price is not given)

Using the formula for cross-price elasticity:

Cross-price elasticity = (Percentage change in quantity demanded of one good) / (Percentage change in price of the other good)

Cross-price elasticity = (60%)/(20%)

Cross-price elasticity = 3

Consequently, there is a 3 percent cross-price elasticity between using the ferry and crossing the Golden Gate Bridge. The fact that a 1% increase in the price of one product results in a 3% increase in the quantity required of the other good suggests that the two goods are substitutes. So the correct answer is B.

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The complete question is:

The toll to cross the Golden Gate Bridge increased by 20 percent and rides on the ferry to cross San Francisco Bay increased by 60 percent. The cross-price elasticity between crossing the Golden Gate Bridge and riding the ferry is _____ and the bridge and the ferry are _____..

A. 40 percent; substitutes

B. 3; substitutes

C. 0.33; complements

D. -3; complements

The peak value of an alternating current passing through a 1460 W device is 3.8 A. The rms voltage across the 1460 W device is 1460 V.

The task is to find the rms voltage across it. The formula to find the rms voltage is V = IR, where V is the voltage, I is the current, and R is the resistance. Since we know the current and the resistance, we can solve for the voltage.

First, we need to convert the peak value of the current to rms current. The peak value of the current is 3.8 A.

The formula to convert the peak value to rms value is Irms = Ipeak / √2.Irms = 3.8 / √2 = 2.68 A

Now that we know the rms current, we can use the formula V = IR to find the voltage.

V = IR = 2.68 A × 1460 W = 3912.8 W

We have the voltage in watts, but we need to find it in volts.

We know that P = IV, where P is power, I is current, and V is voltage.

Solving for V, we get

V = P / I

V = 3912.8 W / 2.68 A

V  = 1460 V.

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