Which metal is used in thermometers?​

Answer:

convection thermal energy causes ocean currents?

Answer:

yes absolutely

Explanation:

why not

As the velocity of a stream carrying a mixture of particles decreases, the heaviest particles will most likely be deposited first. This phenomenon is known as sedimentation.

The process of sedimentation separates particles of different sizes and densities from a mixture by allowing them to settle at different rates due to gravity. The heavier particles settle faster than lighter ones. Therefore, they are the first to be deposited.Sedimentation can occur naturally or artificially. For example, in a river, sedimentation can occur naturally due to changes in water flow and velocity. Artificial sedimentation can be used in water treatment plants to remove impurities from water

The heaviest particles will most likely be deposited first as the velocity of a stream carrying a mixture of particles decreases.Explanation: This is due to the process of sedimentation, which separates particles of different sizes and densities from a mixture by allowing them to settle at different rates due to gravity. The heavier particles settle faster than lighter ones, and hence they are the first to be deposited.

To know more about particles visit:

https://brainly.com/question/30259778

#SPJ11

The resistance of the copper wire is 0.161 Ω. The resistance of a material depends on various factors, including its length, cross-sectional area, and temperature.

What is Resistance?

Resistance is a measure of how much a material opposes the flow of electric current. It is defined as the ratio of the voltage applied to a conductor to the current flowing through it, and is measured in ohms (Ω). Materials with high resistance are poor conductors of electricity, while materials with low resistance are good conductors.

We can use the formula for resistance of a wire:

R = (ρ * L) / A

where R is resistance, ρ is resistivity, L is length of the wire, and A is its cross-sectional area.

We know that the wires are identical, so they have the same length and cross-sectional area. Therefore, their resistances are proportional to their resistivities:

R_aluminum / R_copper = ρ_aluminum / ρ_copper

We can rearrange this to solve for the resistance of the copper wire:

R_copper = R_aluminum * ρ_copper / ρ_aluminum

Plugging in the given values, we get:

R_copper = 0.263 Ω * (1.72 x 10^-8 Ω·m) / (2.82 x 10^-8 Ω·m) = 0.161 Ω

Therefore, the resistance of the copper wire is 0.161 Ω.

Learn more about Resistance from given link

https://brainly.com/question/17563681

#SPJ1

Answer:

The answer is 0km

Explanation:

Given :

A 1200 kg truck traveling at 20 m/s towards the east.

To Find :

The magnitude and direction of the momentum.

Solution :

We know, momentum is given by :

Momentum, P = mv

P = 1200 × 20 kg m/s

P = 24000 kg m/s

Now, we know, direction of momentum is same as the direction of velocity.

Therefore, momentum of truck is 24000 kg m/s and direction is towards the east.

Answer:

Explanation:

While traveling through space, asteroids sometimes collide with each other and break up into smaller fragments. Comets shed dust as they roam the solar system. These 'break ups' result in numerous small particles and fragments, called meteoroids, which orbit the sun. ... Thus a meteor, or shooting star, is formed.

Answer:

While traveling through space, asteroids sometimes collide with each other and break up into smaller fragments. Comets shed dust as they roam the solar system. These 'break ups' result in numerous small particles and fragments, called meteoroids, which orbit the sun. Thus a meteor, or shooting star, is formed.

Explanation:

The car's acceleration is -1.3 meters per the second square

To solve this, use the first equation of motion v=u+at

where, v = final velocity(meters per second )

           u = initial velocity(meters per second )

           a = acceleration(meters per second square)

           t = time (seconds)

According to the question,

Initial velocity(u) of the car = 28 meters per second

Final velocity(v) of the car  = 15 meters per second

Time  (t) = 10 seconds

Acceleration of the car(a) =?

Substituting the values in equation v =u+at

v= u+at

15 = 28 + ax10

15-28 = 10a

-13 = 10a

a = -13/10

a = -1.3 meters per second square

The car's acceleration is =  -1.3 meters per second square

To learn more about Newton's laws of motion, refer

https://brainly.com/question/29775827

The acceleration of this car is equal to -1.3 meters per seconds square (m/s²).

Mathematically, the acceleration of this car can be calculated by using this mathematical expression:

a = (V - U)/t

Where:  

Substituting the given parameters into the acceleration formula, we have;

Acceleration, a = (15 - 28)/10

Acceleration, a = -13/10

Acceleration, a = -1.3 m/s².

Read more on acceleration here: brainly.com/question/24728358

#SPJ1

Answer:

9 m/s

Explanation:

speed = distance ÷ time

27÷3

=9

Answer:

Electromagnetic waves are the only ones that do not need a medium to travel through.

Explanation:

Answer: The answer to this question is D

Answer:

Chemical change.

Explanation:

The saliva or salivary amylase is a bio-catalyst...it causes chemical change during the dissolving process. Also, once the food is dissolved it can't be brought back to it's original state.

Answer:

The molecules of the soup in the pot move faster than those in the freezer.

Explanation:

The soup in the freezer is closer to being a solid than that in the pot. Therefore, it has more energy which will make the molecules move faster.

Answer:

The earth is exposed much more during the summer the hours of daylight is increased slightly

Explanation:

Hi there!

We can use the following:

U (Gravitational Potential Energy) = mgh

m = mass of object (kg)

g = acceleration due to gravity OR gravitational field strength

h = height, or displacement (m)

ΔU = Uf - Ui, so:

Uf = 3 × 1.5 × 10 = 45 J

Ui = 3 × 0 × 10 = 0

ΔU = Uf - Ui = 45 - 0 = 45 J

With the below stated fact  I think that  the pros of using synthetic materials outweighs the cons.

Before we answer the question

If the pros of using synthetic materials outweigh the cons or otherwise, let us first establish the what a synthetic material is and its pros and cons

Synthetic material

Synthetic material is a material in which a substances are changed chemically to produce a material with different characteristics.

Types of Synthetic material

Pros of Synthetic materials

Cons of Synthetic materials

In conclusion

Although Synthetic materials has so very pressing disadvantages to human kind it is unrefusable the importance of Synthetic materials to the day to day live of all humans

Therefore, I think that  the pros of using synthetic materials outweighs the cons

For more information on this visit

https://brainly.com/question/21056290

The rotational kinetic energy of the bowling ball is 506.25 J.

The formula for rotational kinetic energy is:

Rotational kinetic energy = \(\frac{1}{2} I w^2\)

where I is the moment of inertia and w is the angular velocity.

To calculate the moment of inertia for a solid sphere, we use the formula:

\(I = (2/5) m r^2\)

where m is the mass and r is the radius of the sphere.

Plugging in the given values, we get:

\(I = (2/5) * 10 kg * (0.09 m)^2 = 0.081 kg m^2\)

Next, we need to calculate the angular velocity. Since the ball is not rolling, we can assume that the angular velocity is equal to the tangential velocity divided by the radius of the ball. So, the angular velocity is:

w = v / r = 15 m/s / 0.09 m = 166.67 rad/s

Finally, we can plug in the values for I and w into the formula for rotational kinetic energy:

Rotational kinetic energy =\(1/2 * I * w^2 = 1/2 * 0.081 kg m^2 * (166.67 rad/s)^2 = 506.25 J\)

To know more about rotational kinetic energy, refer here:

https://brainly.com/question/30107920#

#SPJ11

Answer:

60 - 45 = A. 15

Explanation:

Subtracted because the plane mirror at an angle is incidence of 60°, so then in order to find the value it would be 60-45 and not adding it or dividing and multiplying to find the value thus the answer is 15.

60 - 45 = A. 15. Subtracted because the plane mirror at an angle is incidence of 60°, so then in order to find the value it would be 60-45 and not adding it or dividing and multiplying to find the value thus the answer is 15.

A flat or highly polished surface called a plane mirror reflects light or waves to create an image. It is a polished, smooth surface that creates a virtual representation of the actual object.

A plane mirror is a surface on which an image can only be produced by at least two light beams. The intersection of these two beams can occur inside the mirror or appear to occur somewhere behind the mirror.

The image that follows illustrates how an object appears when viewed via a plane mirror.

Therefore, 60 - 45 = A. 15. Subtracted because the plane mirror at an angle is incidence of 60°, so then in order to find the value it would be 60-45 and not adding it or dividing and multiplying to find the value thus the answer is 15.

To learn more about Plane mirror, refer to the link:

https://brainly.com/question/13101215

#SPJ2

Answer:

True

Explanation:

Its true

The statement "Galaxies are made of millions of stars, interstellar gas, and dust that stay relatively close together due to magnetic attraction." is false.

Gravitation, also known as gravity, is a fundamental force of nature that attracts objects with mass or energy toward each other. It is the force that keeps planets in orbit around stars, stars in orbit around the centers of their galaxies, and all objects on the surface of the Earth.

According to Newton's law of gravitation, every mass in the universe attracts every other mass with a force that is directly proportional to the product of their masses and inversely proportional to the square of the distance between them. This means that the larger the masses of the objects and the closer they are to each other, the greater the gravitational force between them.

In this question,

Galaxies are made up of millions, or even billions, of stars along with interstellar gas and dust. However, the gravitational force, not magnetic attraction, is what holds the stars and other components of a galaxy together. The gravitational attraction between the stars and other matter in the galaxy is what allows them to orbit around the center of mass of the galaxy. In fact, the vast majority of matter in a galaxy is dark matter, which is an invisible and unknown form of matter that interacts gravitationally with other matter in the galaxy.

While magnetic fields do exist in galaxies, they are generally much weaker than gravitational forces and play a secondary role in the structure and dynamics of galaxies.

To learn more about Newton's law of universal gravitation click:

https://brainly.com/question/858421

#SPJ3

Answer: 29.48 s

Explanation:

Given

The initial height of the ball is \(h=2.6\ m\)

The ball leaves with an initial velocity of \(u=-20\ m/s\)

Using the equation of motion

\(h=ut+\dfrac{1}{2}at^2\\\text{Insert the values}\\\\2.6=20\cdot t+\dfrac{1}{2}\times 9.8\times t^2\\\\\Rightarrow 9.8t^2+20t-5.2\\\\\Rightarrow t=\dfrac{-20\pm \sqrt{20^2-4\times 9.8\times (-5.2)}}{2\times 9.8}\\\\\Rightarrow t=\dfrac{-20\pm 603.84}{19.8}\\\\\Rightarrow t=29.48\ s\quad [\text{Neglecting negative t}]\)

Therefore, it take 29.48 s for ball to reach the ground.

When the area of each plate is doubled while keeping the charge and separation constant, the electric field decreases, the potential difference remains the same, and the stored energy in the capacitor increases four times.

When the area of each plate of a capacitor is doubled while keeping the total charge on each plate and the separation between the plates constant, the following changes occur:

1. Electric Field: The electric field between the plates decreases. The electric field (E) between the plates of a capacitor is inversely proportional to the area (A) of the plates. As the area is doubled, the electric field is halved, assuming the other factors remain constant.

2. Potential Difference: The potential difference (V) across the plates remains the same. The potential difference across the plates of a capacitor depends on the charge (Q) and the capacitance (C), which is determined by the geometric and material properties of the capacitor. Since the total charge and separation between the plates are held constant, the potential difference remains unchanged.

3. Stored Energy: The stored energy in the capacitor increases four times. The energy stored in a capacitor (U) is directly proportional to the area of the plates (A). When the area is doubled, the stored energy is quadrupled (increases by a factor of four).

Therefore, when the area of each plate is doubled while keeping the charge and separation constant, the electric field decreases, the potential difference remains the same, and the stored energy in the capacitor increases four times.

Learn more about capacitors and their properties here:

brainly.com/question/30547869

#SPJ11

Answer:

m₁ = 5.507 x 10⁻³ kg = 5.507 g

Explanation:

The heat released by the steam must be absorbed by the melting wax, according to the law of conservation of energy:

Heat Released by Steam = Heat Absorbed by Wax

Latent Heat of Fusion of Steam = Heat Absorbed by Wax + Latent Heat of Fusion of Wax

m₁H₁ = m₂CΔT₂ + m₂H₂

where,

m₁ = mass of water = ?

H₁ = Latent Heat of Fusion of Water = 2260 KJ/kg = 2.26 x 10⁶ J/kg

m₂ = mass of wax = 50 g = 0.05 kg

C = specific heat capacity of wax = (0.7 cal/g°C)(1000 g/1 kg)(4.184 J/1 Cal)

C = 2928.8 J/kg.°C

ΔT₂ = Change in Temperature of Wax = 55°C - 20°C = 35°C

H₂ = Latent Heat of Fusion of Wax = (35 cal/g)(1000 g/1 kg)(4.184 J/1 Cal)

H₂ = 146440 J/kg

Therefore,

m₁(2.26 x 10⁶ J/kg) = (0.05 kg)(2928.8 J/kg.°C)(35°C) + (0.05 kg)(146440 J/kg)

m₁ = (5125.4 J + 7322 J)/2.26 x 10⁶ J/kg

m₁ = 5.507 x 10⁻³ kg = 5.507 g

If the frequency of a radio station is 105.9 MHz, the frequency in hertz is 1.059 × 10⁸ Hertz.

Frequency in physics is the quotient of the number of times or a periodic phenomenon that occurs over the time (t) in which it occur.

Hertz and Megahertz are both units of measurement of frequency, which means inverse of the seconds i.e. 1/s.

However, the conversion factor of Hertz and Megahertz are as follows:

1 megahertz = 1000000 hertz

According to this question, the frequency of a radio station is 105.9 MHz, this frequency can be converted as follows:

105.9 × 1000000 = 1.059 × 10⁸ Hertz

Therefore, If the frequency of a radio station is 105.9 MHz, the frequency in hertz is 1.059 × 10⁸ Hertz.

Learn more about frequency at: https://brainly.com/question/14316711

#SPJ1

The wavelength (in feet) of the sound wave with a velocity of 1125 ft/s and a frequency of 600 Hz is 1.88 ft

The velocity of a wave is related to its frequency and wavelength according to the following equation:

Velocity (v) = wavelength (λ) × frequency (f)

v = λf

From the question given, the following data were obtained:

The wavelength of the wave can be obtained as follow:

v = λf

Divide both sides by f

λ = v / f

λ = 1125 / 600

λ = 1.88 ft

Thus, the wavelegth of the wave is 1.88 ft

Learn more about wave:

https://brainly.com/question/14630790

#SPJ1

\(\huge{\underline{\underline{\mathrm{\color{red}{AnswEr}}}}}\)

As a sample of water turns to ice, A new molecules are formed.

When a step-up transformer is used to increase voltage, the current in the secondary coil will be less than the current in the primary coil. This is due to the conservation of energy, which dictates that the power input must equal the power output.

Since power is equal to voltage times current, increasing the voltage will cause a corresponding decrease in the current to maintain a constant power output.

In this specific example, the voltage is increased from 25 V to 120 V. Assuming the transformer is 100% efficient (meaning no energy is lost to heat or other factors), the current in the secondary coil will be 1/5 (or 20%) of the current in the primary coil. This is because the power output must equal the power input, and the power is proportional to the product of voltage and current.

Therefore, if the primary coil has a current of 2 amps, the secondary coil will have a current of 0.4 amps. This is a common tradeoff in electrical systems, as increasing voltage can allow for more efficient transmission of power over long distances, but requires careful consideration of the resulting current and power requirements.

to know more about current click this link

brainly.com/question/15141911

#SPJ11

ΔU = mgh is the expression to Gravitational Potential Energy for Height (h).

A book on even a high shelf, for instance, has more energy potential than a book here on bottom shelf since it requires a longer distance to fall. Items having gravitational potential energy can also include the following: a heavier burden. water retentive to a dam.

The energy held within an item as a result of its height above the ground is known as gravitational potential energy. The object's height, gravitational acceleration caused by the Earth, and mass all play a role in this. The energy an item possesses as a result of its motion is known as kinetic energy.

To know more about Gravitational Potential Energy visit:

https://brainly.com/question/2965531

#SPJ1

Answer:

the magnet is not moving relative to the wire so B

Explanation:

The magnet is not moving relative to the wire if, A permanent magnet is placed in a coil of wire, If there is no electric current in the wire so, option B is correct.

Electric current is a term used to describe how much electricity flows across a circuit and how it flows in an electronic circuit. Amperes are used to measure it (A). The more electricity flowing across the circuit, the higher the ampere value.

When current flows through a coil of wire, it transforms into an electromagnet. The coil spins as a result of the electromagnet's interaction with a permanent magnet.

An electromagnet is created when current passes through a coil of wire. Because of the electromagnet's interaction with a permanent magnet, the coil spins.

Thus, The magnet is not moving relative to the wire.

To know more about current:

https://brainly.com/question/4289257

#SPJ2

An acid-base indicator is a compound with a physical property that changes abruptly near the equivalence point.

An acid-base indicator is a chemical compound that is used to determine the endpoint of a chemical reaction. The endpoint of a chemical reaction is the point at which the reaction is complete or the point at which a chemical reaction is in equilibrium. The physical property of an indicator that changes abruptly near the endpoint is usually its color. In the case of an acid-base indicator, the color changes from one color to another as the pH of the solution changes.

This change in color occurs because the acidic or basic properties of the indicator change. The indicator can be used to determine the pH of a solution or to determine the concentration of an acid or base. The most commonly used acid-base indicator is litmus paper, which changes from blue to red in the presence of an acid. So therefore an acid-base indicator is a compound with a physical property that changes abruptly near the equivalence point.

Learn more about acid-base indicator at:

https://brainly.com/question/31783897

#SPJ11