when is something weight less

Some rocks are pushed deeper into the earth. As these rocks experience greater heat and pressure, they will turn into metamorphic rocks if they do not melt.

Although they began as a different kind of rock, metamorphic rocks have undergone significant alteration from their igneous, sedimentary, or previous metamorphic forms. When rocks are exposed to extreme temperatures, high pressures, hot mineral-rich fluids, or, more frequently, some combination of these conditions, metamorphic rocks are created.

Metamorphic rocks, which have been exposed at the Earth's surface as a result of erosion and uplift, can be studied to learn more about the pressures and temperatures that exist at extremely deep levels of the crust. The metamorphic rocks gneiss, slate, marble, schist, and quartzite are a few examples.

The two classifications of metamorphic rocks are foliates and non-foliates. Micas and chlorites make up a sizable portion of foliates.

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The complete question is ''Some rocks are pushed deeper into the earth. as these rocks experience greater heat and pressure, what type of rock will they turn into if they do not melt?

a. molten

b. sedimentary

c. igneous

d. metamorphic

The items in the left column matched to the items in the right column:

This is the length between two different points; say point A to B. It is measured in meters ( m).

In conclusion, the length of the entire path an object travels from start to end is regarded as distance

Vectors are quantities which have both magnitude and direction.

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Free body diagrams are used in mechanics problems to illustrate forces and moments applied to a body and to compute reactions.

The relative strength and direction of all forces operating on an object in a specific circumstance can be depicted using free body diagrams (FBDs), which are helpful tools. The careful creation of a free-body diagram is a prerequisite for the analysis and description of the majority of physical processes. In a free body diagram, the size of the arrow represents the force's magnitude, while the direction of the arrow represents the way it acts.

These diagrams are widely used to compute internal forces within a structure, as well as to determine the loading of certain structural components.

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Answer:

55.5 ° C

Explanation:

A unit of K  and a degre C are the same increment

586 j / (80 g  C )  = .240

C = 30.5 degree increase from 25 c = 55.5 ° C

The correct answer is :

1) Matter exists in four different natural states: solids, liquids, gases, and plasma.

2) Whether a thing is a solid, liquid, or gas depends on two factors:

a substance's constituent atoms, molecules, or ions are made up of their individual kinetic energies. The particles are typically kept apart by kinetic energy. The intermolecular forces that tend to bind particles together with attractive force.

A substance won't condense into a liquid or solid if the average kinetic energy is higher than the attraction forces holding the particles together. A liquid or solid will develop if the kinetic energy is lower than the attraction forces.

3) A solid is distinguished by its structural rigidity and resistance to external forces. A solid substance, unlike a liquid, does not flow to conform to the shape of its container or, like a gas, expand to cover the entire space.

4) Particles that are organised in three dimensions make up crystalline solids. They have equivalent intermolecular forces between them. They have a distinct melting temperature and are anisotropic. The genuine solids are what they are known as. Diamond, benzoic acid, and other crystalline solids are among examples. The use of diamonds includes the creation of exquisite jewellery and the cutting of glass, among other things.

Amorphous means having no defined shape. Solid particles are arranged erratically in amorphous materials. They do not have equivalent intermolecular forces between them. Additionally, the separation between every two particles varies. They lack a recognisable geometric shape. Amorphous solids are isotropic materials that are also referred to as supercooled liquids. Glass and other amorphous solids are a few examples.

5) Because the intermolecular interactions permit the molecules to move, both the liquid and gas phases are fluid. The materials don't have set shapes in each of these phases; instead, the containers housing them shape them.

6) The ability of a fluid to resist relative motion between two surfaces that are moving at different speeds is known as viscosity. In simpler terms, viscosity refers to friction between fluid molecules or resistance to flow.

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The boy can throw a ball with the same initial speed at all angles then the height of the ball traveled will be 12.6m

Equations of motion in physics are equations that explain how a physical system behaves in terms of how its motion changes over time. The behavior of a physical system is described in further detail by the equations of motion as a collection of mathematical functions expressed in terms of dynamic variables.

The three equations are,

v = u + at.

v² = u² + 2as.

s = ut + ½at²

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The most important advantage of observing living things in a closed setting is to observe the causes and effects of a given variable.

The expression 'cause and effect in experimentation' refers to which are the dependent variables whose changes depend on the independent variable, which only can be tested in a closed system during experimental procedures.

In conclusion, the most important advantage of observing living things in a closed setting is to observe the causes and effects of a given variable.

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Answer:

It is false

Explanation:

I am not sure behind the science on this, but if I had to guess I would chose false. This is because preventing certain things from happening in the long run can at least do a good job of reducing the chance of something happening, correct? Don’t take my answer as correct right away, do a quick search up on the internet and you should be able to find what your looking for with the science behind it! You got it!

The speed of sound through air is linearly related to the temperature of the air is 1m/ sec per degree Celcius.

The speed of sound through air is linearly related to the temperature of the air. If sound travels at 324 m/sec at 0 degrees Celcius and at 344 m/ sec at 20 degrees Celcius.

1. Construct a literal model relating the speed of sound (s) and the air temperature (t). Interpret the slope of this model.

From the word, the problem pulls out the two points (0,324) and (20,344). Use these to find the slope of the linear model.

[tex]\frac{(344-324)}{(20-0)}[/tex] so the slope is 1m/sec/deg or change of speed of sound per degree change in temperature

plugging this into the point-slope equation for a line where y=s and x=t

s-324 = 1(t-0)

the linear model is s =t + 324

2. Interpret the slope of this model

a) The rate of change of speed of sound with respect to temperature is 1m/ sec per degree Celcius.

In terms of physics, sound may be a  vibration that travels through a transmission medium like a gas, liquid, or solid as a sound wave. Sound is the reception of these waves and the brain's perception of them in terms of human physiology and psychology.  Only acoustic waves with frequencies between roughly 20 Hz and 20 kHz, or the audio range, can cause people to have an auditory sensation. These are sound waves with wavelengths starting from  17 meters (56 ft) to 1.7 millimeters in the air at air pressure  (0.67 in). Ultrasounds are sound waves with a frequency above  20 kHz that are inaudible to humans. Infrasound refers to sound frequencies below 20 Hz. Animals of various species have different hearing ranges.

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The correct answer is The minuscule hills and valleys of two contacting surfaces grow, which causes friction. Describe how friction is impacted by the pressure pressing two surfaces together. The amount of friction between two surfaces increases as the force pulling the surfaces together increases.

Frictional force is the force produced when two surfaces slide against and touch each other. The surface texture and amount of force needing them together have the biggest an impact on these forces.

The forces of adhesion between the sites of contact areas of the surfaces, which are always minutely uneven, are the primary cause of friction between objects. The action of the imperfections of the harder surface tilling across the softer surface shears these "fused" connections, causing friction.

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The health risks include Health Effects of Sleep Loss, Poor glucose tolerance and diabetes.

Both adults and kids who are obese.

Vascular disease and high blood pressure.

Anxiety signs.

Depressed attitude

Using alcohol.

Sleep deprivation can leave you cranky and confused. Many people might not be aware of the potential effects on your capacity to lose weight, memory, health, and even your sexual life.

You run the risk of developing heart disease if you have sleep disorders or persistent sleep deprivation.

Chest pains.

A heart attack.

Abnormal heartbeat

Elevated blood pressure

Stroke.

Chronic sleep deprivation has been linked to high blood pressure, heart attacks, strokes, obesity, diabetes, depression, anxiety, impaired brain function, memory loss, weakened immune system, and lower levels of energy.

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According to the resistance, the resistivity of wire material is 1.37 x 10¯⁷ Ωm.

We need to know about the resistance of conductive material to solve this problem. Resistance can be defined as the ratio of the voltage applied to current flow It can be written as

R = V / I

where R is resistance, V is voltage and I is current.

The resistance of the material depends on its resistivity and follows this equation

R = ρ . L / A

where ρ is resistivity, L is the length of the material and A is the surface.

From the question above, we know that

V = 4.5 V

L = 2.5 m

r = 0.654 mm = 6.54 x 10¯⁴ m

I = 17.6 A

Find the surface area

A = π . r²

A = π . ( 6.54 x 10¯⁴ )²

A = 1.34 x 10¯⁶ m²

Find the resistivity of the wire

R = V / I

ρ . 2.5 / (1.34 x 10¯⁶)= 4.5 / 17.6

ρ = 1.37 x 10¯⁷ Ωm

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The acceleration of the wishbone is 13.08 m/s².

Acceleration is the rate of change of velocity. The S.I unit of acceleration is m/s².

To calculate the initial acceleration of the wishbone, we use the formula below.

Formula:

Where:

From the question,

Given:

Substitute these values into equation 1

Hence, the acceleration of the wishbone is 13.08 m/s².

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Ashley will have 86.909 pounds to spend on the trip in London.

1 British pound = 1.43 American dollars

This shows the conversion of British pound into American dollars.

1 American dollar = [tex]\frac{1}{1.43}[/tex] British pound

1 American dollar = 0.6993 British pound

Ashley has  $130.00

The amount of money she will have in British Pound can be calculated as:

=  $130.00 * 0.6993

= 90.909 British Pound

Fee charged by the bank to convert the currency from American dollars to British pounds = 4 British pounds

Remaining amount after paying bank's fee = 90.909 - 4

= 86.909 British pounds

Therefore Ashley will have 86.909 British pounds after she changes all of her dollars to pounds.

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Answer:

Yes

Explanation:Yes it has light pollution

Answer:

b one is correct........I wish u give me mark as brainlliest

The tension in the string for waves of frequency of 39 Hz to have a wavelength of 0.740 m is 1166 N.

The velocity(v) of a wave in a string is given by the following formula

V = 1/2L x √(T/μ) .........(i)

Here, L is the length of rope

T is the tension

μ is the mass per unit length i.e, M/L

We know that v = f x λ

Where f is the frequency and λ is the wavelength

So, the equation becomes

f x λ =  1/2L x √(T/μ)

Putting f = 39 Hz, lambda = 0.740 m, L= 2.80 m and m = 0.125 kg

39 x 0.740 = 1/2(2.80) root T/(0.125/2.80)

On solving the above equation

T = 1166 N.

Hence, the tension in the string for waves of frequency of 39 Hz to have a wavelength of 0.740 m is 1166 N.

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The equation of motion in terms of v and x is    [tex]\frac{dv}{dx} = -\mu v[/tex]

Velocity is the directional speed of a moving item as an indication of its rate of change in position as seen from a specific frame of reference and measured by a specific time standard (e.g., 60 km/h northbound). The idea of velocity is crucial in kinematics, the part of classical mechanics that explains the motion of bodies.

A physical vector quantity called velocity requires both magnitude and direction to be defined. Speed is a coherent derived unit that expresses the scalar absolute value (magnitude) of velocity. Its quantity is expressed in SI units (metric system) of metres per second (m/s or ms1). For example, "5 meters per second" is a scalar while "5 meters per second east" is a vector.

Let [tex]v(t) = \frac{ds}{dt}[/tex] be the velocity of a time t . Now its time rate of change, [tex]\acute{v}[/tex] = [tex]\frac{dv}{dt}[/tex]

is the acceleration, Therefore,

⇒   [tex]a(t)=v^{\prime}(t)=\frac{d}{d t}\left(\frac{d s}{d t}\right)[/tex]

On the other hand, the acceleration will be given by

⇒ [tex]a = - \mu v^2[/tex]

Where [tex]\mu[/tex] is constant, thus

⇒    [tex]\frac{dv}{dt} = -\mu v^2[/tex]

Where is the motion equation expressed in terms of v and t We must now write it in terms of v and x. To accomplish this, we make use of the fact that

⇒      [tex]\frac{d v}{d t}=\frac{d v}{d x} \cdot \frac{d x}{d t}=v \frac{d v}{d x}[/tex]

We now substitute the acquired result into the supplied equation.

⇒      [tex]v \frac{d v}{d x}=\frac{d v}{d t}=-\mu v^2[/tex]

Divide the equation by v ≠ 0

⇒       [tex]\frac{dv}{dx} = -\mu v[/tex]

We have changed the provided equation of motion in terms of v and x in this manner.

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Full question

A rocket sled having an initial speed of 160 mi/h is slowed by a channel of water. Assume that, during the braking process, the acceleration a is given by

                                        [tex]av = -\mu v^2[/tex]

where v is the velocity and \mu is a constant. (a) As in Example 4 in the text, use the relation

                                         [tex]\frac{dv}{dt} = v\frac{dv}{dx}[/tex]

to write the equation of motion in terms of v and x.

The mixture of solids that can be separated by using both shape and size is oval beads, marbles, and dice (option B).

A mixture in chemistry is any substance that is made up of two or more constituents that can easily be separated using physical means.

Mixtures, unlike compounds, contain substances that retain their chemical composition since there is no chemical bonding.

This makes the components of a mixture separable by physical techniques such as heating, magnetism etc.

Therefore, the mixture of solids that can be separated by using both shape and size is oval beads, marbles, and dice because they are all of different and unique shapes and sizes.

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The average speed of the family is 2.5 mph.

At the same speed used to walk to school, the distance traveled in one hour is 4.5 miles.

The average speed of an object is the total distance traveled by the object to the total time of motion of the object.

v = total distance / total time motion

total distance = 2.5 miles

total time = 6 pm - 5 pm = 1 hour

v = (2.5 miles) / (1 hour)

v = 2.5 mph

When it takes 20 minutes to walk 1.5 miles, the speed of the motion is calculated as follows;

time = 20 mins / 60 mins/hr =  0.333 hr

v = 1.5 miles / 0.333 hr = 4.5 mph

At this speed, the distance traveled in one hour is calculated as follows;

d = 4.5 mph x 1 hr

d = 4.5 miles

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The time when both the balls meet is found to be 8.4seconds.

By Newton’s third equation of motion

h = ut -1/2 gt²

-(210-h) = ½ ×gt²

h= 210 -1/2 gt²      (eq.1)

Now, we apply same equation for the ball thrown upward with initial speed of 25m/s

h = ut -1/2 gt²

h = 25t -1/2gt²      (eq.2)

On comparing eq. 1 and eq. 2 we get,

210 -1/2gt² = 25t -1/2gt²

210 = 25t

t = 8.4 sec.

Thus, the time when both the balls meet is found to be 8.4sec.

There are three laws of motion, which are stated by Sir, Isaac Newton. He describes the relation between the motion of the object and the forces which are acting on it during a projectile or simple motion. On the basis of three laws of motion, equations are dervied which are used to find the speed, height, velocity or acceleration of the object.

The three equations of motions are as follows:-

1. V= u + at

2. S= ut +1/2 at²

3. v²=u² + 2as.

Where, v is the final velocity, u is initial velocity, a is acceleration, s is distance covered and t is time taken.

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The time required to travel the distance from earth to the moon, which is 380,000 km is 34545.45sec.

The formula of speed is speed = distance/time. To check out what the checks are for speed, you must to understand the units for distance and time.

As we know that

Speed = distance/ time

first, convert km into m of distance

then 380,000 km distance will be 380000000m.

putting the given values in the formula

12800 = 380000000 / time

The time required would be

34545.45 seconds.

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Hello! Lets begin!

1. Which answer best describes displacement?

2. Kelley is playing pool and hits the cue into the nine ball, which is directly in the center of the pool table. The nine ball travels a total of 7 meters before stopping, 1 meter to the left of the initial starting point of the nine ball. Which sentence reflects the correct statement regarding distance and displacement when considering the motion of the nine ball?

3. What is velocity?

4. Imagine a time-position graph where the velocity of an object is constant. What will be observed on the graph concerning the slope of the line segment as well as the velocity of the object?

5. Select the option that best summarizes the reason for the use of position-time graphs when studying physical science.

_______________________________________________________

Good luck my peeps! ;D

The position-time graphs show the relationship between the position of an object (shown on the y-axis) and the time (shown on the x-axis) to show velocity.

Velocity is a vector quantity that tells the distance an object has traveled over a period of time.

Displacement is a vector quality showing total length of an area traveled by a particular object.

Imagine a time-position graph where the velocity of an object is constant. What will be observed on the graph concerning the slope of the line segment as well as the velocity of the object?

The slope of the line is equal to zero and the object will be stationary.

The position-time graphs show the relationship between the position of an object (shown on the y-axis) and the time (shown on the x-axis) to show velocity.

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The distance between first airplane and second airplane after 3.3 hours of their departure is 4210.67 meters

The cosine formula for vector addition is -

|R|² = |A|² + |B|² + 2AB cosφ

Where - φ is the angle between vectors A and B.

Given is two airplanes that leave the airport at same time. The velocity of the first airplane is 710 m/h at a heading of 27.5°. The velocity of the second airplane is 650 m/h at a heading of 167°.

The length of the position vector of first airplane →

|OA| = velocity x time = 710 x 3.3 = 2343 miles.

The length of the position vector of second airplane →

|OB| = velocity x time = 650 x 3.3 = 2145 miles

Angle between vectors OA and OB →

φ = 167° - 27.5° = 139.5°

In the triangle ΔOAB, using the triangle law of vector addition, we get →

OA + AB = OB

AB = OB - OA

AB = OB + (- OA)

Now, using the formula for resultant of addition of two vectors →

AB² = (OB)² + (- OA)² + 2(OA)(- OB) cosφ

AB² = OB² + OA² + - 2(OA)(OB)cosφ

AB² = 54,89,649 + 46,01,025 - 2 x 2343 x 2145 x cos(139.5°)

AB² = 54,89,649 + 46,01,025 - 2 x 2343 x 2145 x - 0.76

AB² = 1,00,90,674 + 76,39,117.2  = 1,77,29,791.2

AB = √1,77,29,791.2

AB = 4210.67 meters

Hence, the distance between first airplane and second airplane after 3.3 hours of their departure is 4210.67 meters

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Distance between them is decrease by an element of 0.21

Evaluating :

Two point charges are brought closer together, increasing the force by an element of 22

Let the first force be

F = [tex]\frac{kq_{1} q_{2} }{r^{2} } ...........1[/tex]

where q₁ q₂ are charges and r is that the distance between  new force                             F' = [tex]\frac{Kq_{1} q_{2} }{r^{2} } ................2[/tex]

                       divide  equation 1 & 2

[tex]\frac{F}{F'}[/tex] = [tex]\frac{r^{2} }{r'^{2} }[/tex]

[tex]22= \frac{r^{2} }{r'^{2} }[/tex]

r' = [tex]\frac{r}{\sqrt{22} }[/tex] ≈0.213r

F₁ represents the first electric force between the two point charges.

F₂ represents the new electric force between the 2 point charges.

r₁ represents the first separation distance between the two point charge.

r₂ represents the new separation distance between the 2 point charge.

Distance between them is decrease by an element of 0.21

Electric Force:

The term 'electric force' exists when two or more electric charges are situated at a specific distance. The variation of electrical force with point charge magnitude is a linear one, whereas the variation of electrical force with the separation distance between the charges is an inversely square one.

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The pH of the 1×10⁻⁴ M hydrochloric acid, HCl solution is 4

We'll begin by obtaining the concentration of the hydrogen ion, H⁺ in th solution. This is illustrated below:

Dissociation equation

HCl(aq) —> H⁺(aq) + Cl¯(aq)

From the balanced equation above,

1 mole of HCl contains 1 mole of H⁺

Therefore,

1×10⁻⁴ M HCl will also contain 1×10⁻⁴ M H⁺

The pH of the solution can be obtained as follow:

pH = –Log H⁺

pH = –Log 1×10⁻⁴ M

pH = 4

Thus, we can conclude that the pH of the solution is 4

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The total distance covered is 21 km while their displacement is 14.87 km SouthWest.

The distance covered by a moving body is the product of the speed of movement and the total time taken.

Displacement, on the other hand, is the property of a body or an object to be moved from one place to another.

While distance is a scalar quantity, displacement is a vector quantity.

In this case, the total distance covered by Justing can be calculated as:

15 km + 5 km + 1 km = 21 km

The displacement can be calculated from the attached image:

[tex]hyp^2 = opp^2 + adj^2[/tex]

         = [tex]14^2 + 5^2[/tex]

               = 221

                 = 14.87 km

Thus, they have been displaced by 14.87 km from the starting point in the SouthWestern direction.

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Answer:

100 meters, I believe.

Explanation:

The correct answer for the value of height of the cliff is [tex]22.5[/tex] meter.

Given:

initial velocity: [tex]20[/tex] m/s

Final velocity: [tex]0[/tex] m/s

Time taken: [tex]5[/tex] seconds

To calculate height of the cliff, Use equation of motion:

[tex]s= ut + \dfrac{1}{2}gt^2[/tex]

[tex]g[/tex] will be negative as rock is thrown below the initial point.

[tex]s=[/tex] Height of the cliff

[tex]= 20*5 + \dfrac{1}{2} *(-9.8) * 25[/tex]

[tex]= 100 - 122.5[/tex]

[tex]= -22.5[/tex] meter

negative sign indicates downward direction

Height of the cliff is [tex]22.5[/tex] meter.

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