Which direction does heat flow from?

hot to cold
cold to hot
hot to hot
cold to cold

Answer:

The heating curve for glass would be different from the heating curve for water because water has a strange behavior while glass also has a strange behavior but is different because it lacks the repeating crystalline structure of solids like ice, or water. Glass becomes soft and impressionable as temperature increases.

Since glass lacks the repetitive crystalline structure present in solids like ice or water, its strange behavior differs from that of glass when heated. This is because glass has a unique, strange behavior than water. As temperature rises, glass becomes brittle and impressionable.

A difference in temperature causes energy to flow from one body to another, recognized as heat. Energy is transferred, or heat flows, when two substances of different temperatures are brought together. The hotter body goes to the cold.

Typically, though not always, this energy transfer causes the temperature of the region of lower temperature to rise and the temperature of the warmer object to fall. It is possible for a substance to absorb heat without increasing its temperature by migrating from one physical state (or phase) to another, such as melting, sublimation, boiling, or shifting from one solid form to the other.

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Answer:

[tex]\huge\boxed{\sf Option \ D.}[/tex]

Explanation:

Potential Energy:

Type of Quantity:

Unit:

Types:

[tex]\rule[225]{225}{2}[/tex]

Answer: B

Explanation:

The conventional units for Joules is defined with kilograms. We are given the mass of the bullet in grams. Using the conversion factor of 1kg = 1000g, we get that:

[tex]1g*\frac{1kg}{1000g} =1*10^-^3kg[/tex]

Kinetic energy is defined to be:

[tex]KE=\frac{1}{2} mv^2[/tex]

[tex]KE=\frac{1}{2} (10^-^3kg)(1000m/s)^2[/tex]

[tex]KE=500J=5*10^2J[/tex]

No.of primary turns/no.of secondary equal to current in primary /current in secondary therefore 200/120=3.50/C.in secondary =2.1A

Answer:

Bağışlayın, bəzi problemlərim olduğu üçün bunu edirəm.

The distance from the 2.0 kg mass at which a string should be attached to balance the rod is 0.67 m.

Distance can be defined as the horizontal length between two points.

To calculate the distance at which the string must be attached to balance the rod, we use the formula below.

Formula:

From the question,

Given

Substitute these values into equation 1

Solve for x

Collect like terms

Hence, the distance from the 2.0 kg mass at which a string should be attached to balance the rod is 0.67 m.

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Answer:

(a) parallel circuit

(b) (i) ammeter (ii) current

Hope this helps!

I think by adding more variables to the experiment.

Answer:

Always on the move

Nothing stays the same

The sun comes and goes

The night you can never escape

Nothing can last for ever

Everything we know rotates

I thought this would be more clever

But it's late and I don't know what else to say

Those were eight lines only

Counting lines makes you lonely

Sixteen is a big number

I feel like I'm going under

It's always daytime somewhere

But it will never be forever

I move in circles

This poem is over

Explanation:

Sorry I thought it would end up better than this

If you hold a heavy weight over your head, the work you do is Is converted into potential energy.

Work is said to be done when the applied force displaces an object over a given distance.

Work energy theorem states that, the work done on object is equal to change in mechanical energy of the object.

When an object is raised over a given distance the work done is equal to the potential energy of the object given as;

W = P.E = mgh

Thus, If you hold a heavy weight over your head, the work you do is Is converted into potential energy.

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Answer: The equation that relates wavelength and frequency for electromagnetic waves is: λν=c where λ is the wavelength, ν is the frequency and c is the speed of light.

10/0.5=20 meter.

Explanation:

The speed of a wave has a wavelength of 0.5 m/s and a frequency of 2 hz is   0.25 m.

Wave is is a disturbance in a medium that carries energy as well as momentum . wave is characterized by amplitude, wavelength and phase. Amplitude is the greatest distance that the particles are vibrating. especially a sound or radio wave, moves up and down. Amplitude is a measure of loudness of a sound wave. More amplitude means more loud is the sound wave.

Wavelength is the distance between two points on the wave which are in same phase. Phase is the position of a wave at a point at time t on a waveform.

There are two types of the wave longitudinal wave and transverse wave.

Longitudinal wave : in which, vibration of the medium (particle) is parallel to propagation of the wave. Sound wave is a longitudinal wave.

Transverse wave : in which, vibration of the medium (particle) is perpendicular to propagation of the wave. Light wave is a Transverse wave.

The relation between velocity, frequency  and wavelength is,

c = λν

Where λ is wavelength, ν is frequency and c is velocity.

Given,

c = 0.5 m/s

ν = 2 hz

λ = ?

Putting all the values in the equation,

0.5 = 2λ

λ = 0.5/2 = 0.25 m

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Answer: C Low energy electromagnetic waves are either reflecting by or transmitted through body tissue.

Explanation:

Question :-

Answer :-

Explanation :-

As per the provided information in the given question, we have been given that the Mass of the body is 2 kg . Speed of the body is given [tex] \bf{10 \: {ms}^{ - 1} } [/tex] . And, we have been asked to calculate the Kinetic Energy .

For calculating the Kinetic Energy , we will use the Formula :-

[tex] \bigstar \: \: \boxed{ \sf{ \: Kinetic \: Energy \: = \: \dfrac{1}{2} \: \times \: {mv}^{2} \: }} \\ [/tex]

Where ,

Therefore , by Substituting the given values in the above Formula :-

[tex] \longmapsto \: \: \sf{ Kinetic \: Energy \: = \: \dfrac{1}{2} \: \times \: {m \: \times \: v}^{2} } \\ [/tex]

[tex] \longmapsto \: \: \sf{Kinetic \: Energy \: = \: \dfrac{1}{2} \: \times \: 2 \: \times \: {10}^{2} } \\ [/tex]

[tex] \longmapsto \: \: \sf{Kinetic \: Energy \: = \: \dfrac{1}{2} \: \times \: 2 \: \times \: 100 } \\ [/tex]

[tex] \longmapsto \: \: \sf{Kinetic \: Energy \: = \: \dfrac{1 \: \times \: 2 \: \times \: 100}{2}} \\ [/tex]

[tex] \longmapsto \: \: {\textbf {\textsf {Kinetic \: Energy \: = \: 100 \: Joule }}} [/tex]

[tex] \underline {\rule {180pt} {4pt}} [/tex]

The kinetic energy of the body with the given value of mass travelling at the given speed is 100 Joules.

Kinetic energy is simply a form of energy a particle or object possesses due to its motion.

It is expressed as;

K = (1/2)mv²

Where m is mass of the object and v is its velocity.

Given the data in the question;

We substitute our given values into the above expression to determine the kinetic energy of the body.

K = (1/2)mv²

K = (1/2) × 2kg × (10ms⁻¹)²

K = 0.5 × 2kg × 100m²s⁻¹
K = 100kgm²s⁻¹

K = 100J

Therefore, the kinetic energy of the body with the given value of mass travelling at the given speed is 100 Joules.

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Answer:

it would be the same because they are equal

Answer:

to reduce the pace of accident

Considering the definition of speed and propagation of sound, sound is a sequence of waves of pressure which propagates through compressible media and depends on the characteristics of the medium in which the propagation occurs.

Sound is a vibration that propagates as an acoustic wave, through a transmission medium such as a gas, liquid or solid.

That is, sound is a longitudinal wave, mechanical (does not travel in a vacuum) and propagates in all directions, so that the wave front is spherical.

Propagation of sound involves energy transport without matter transport, in the form of mechanical waves.

The speed of propagation of a sound wave depends on the characteristics of the medium in which the propagation occurs and not on the characteristics of the wave or the force that generates it. The speed of propagation of sound waves is also known as the speed of sound.

In summary, sound is a sequence of waves of pressure which propagates through compressible media and depends on the characteristics of the medium in which the propagation occurs.

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Answer:

Because nail is made of metal

Answer: The answers are Biomass, Solar, and Hydroelectric! :)

Explanation:

Answer:

There would be a huge sound like an applause. At 200 decibels (the loudest possible sound ever created on Earth), it could shatter ear drums.

Explanation:

Hope this helps

If everyone on the planet screamed at the same moment, it would be a tremendously loud and chaotic event.

The particular impacts and repercussions, however, would be dependent on a variety of parameters such as the strength of the screams, the length, and the location of persons.

The cumulative cries of billions of individuals would produce a deafening loudness, perhaps reaching levels far beyond what the human ear can handle.

Thus, those in close proximity to people yelling may experience discomfort, confusion, and even bodily pain as a result of the loudness.

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Answer:

93m/s

Explanation:

Solution,

Here,

Length(l)=0.72m

Mass(m)=5x 10⁻³

T=60N

As we have

v=√T/μ

And

μ=m/l

μ=5 x 10⁻³ /0.72

Now

v=√60×0.72/5 x 10⁻³

v=√8640

v=92.95m/s=93m/s

Answer:  the  most affected object by friction is the Y

Explanation:

The fluid friction consists of 2 parts.

viscous resistance and friction with air.

assuming that the objects are in contact with the air, the situation is described by the following equation.

with: C= numerical drag coefficient

p= density

A= Area of the object

v= velocity

so assuming the other variables are constants the area of the object is directly proportional to the fluid friction

Answer:

X: convex Y: Concave

Explanation:

Just got it right

Insulators are often defined as materials that do not allow electricity to flow through them. Option A is correct. Electrons in an insulator do not move readily.

Insulators are commonly employed in physics. Insulators are often defined as materials that do not allow electricity to flow through them.

Insulators are also referred to as poor electrical conductors. We may discover various instances of these insulators in our daily lives. Insulators include materials such as paper, glass, rubber, and plastic.

Insulators are often defined as materials that do not allow electricity to flow through them. Electrons in an insulator do not move readily

Hence option A is correct. Electrons in an insulator do not move readily

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The distance between the two objects is 1.5 cm.

To calculate the distance between the two objects, we use the formula obtained from Columb's law

Columb's law states that the force of attraction or repulsion between two charges is directly proportional to the product of the charges and inversely proportional to the square of the distance between them.

Formula:

Where:

Make r the subject of the equation

From the question,

Given:

Substitute these values into equation 2

Hence, The distance between the two objects is 1.5 cm.

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Answer:

it would be loud

Explanation:

it would be loud