t and x are about physical velocity, what do they read respectively?

The amount of change in time, the amount of change in displacement.

Physics reads mju:

Refers to the coefficient of friction, which is the ratio of the frictional force between two surfaces and the perpendicular force acting on one of their surfaces. It is and the roughness of the surface.

It has nothing to do with the size of the area of contact dismantling. According to the nature of the motion, it can be divided into dynamic friction coefficients.

and the coefficient of static friction. Sliding friction.

It is caused by two objects touching each other and sliding relative to each other.

If the two surfaces are stationary with each other, the contact between the two surfaces will form a strong combined static friction.

The ratio of the force before the movement of the force to the surface of one surface is called the coefficient of static friction s.

For example, after some time after the car starts, it will slowly slow down and finally come to a standstill. This means that when an object is in motion, there is still friction between its surface and the other surface. Experiments have found that this force is less than the friction force of the trouser size at rest, and we define this friction force and the force perpendicular to the ground as the dynamic friction coefficient k.

, the fifth letter of the Greek alphabet, uppercase , lowercase , the e of the Latin alphabet is derived from . It can also refer to a phonetic alphabet used in American English. It is also the minimum energy value in the German physicist Planck's hypothesis of the quantization of the god (called the stool energy particle).

The dielectric constant of a conductor.

It is also the minimum energy value (called energy particles) in the German physicist Planck's energy quantization hypothesis.

Linear strain is represented in statics.

The set symbol is evolved by .

The cardinal number of logarithms.

Order function.

Magnetic flux field stool.

Definition: In a uniform magnetic field with a magnetic induction intensity of b, there is a plane with an area of s perpendicular to the direction of the magnetic field, and the product of the magnetic induction intensity b and the area s is called the magnetic flux passing through this plane, referred to as magnetic flux.

Formula: =bs, the applicable condition is that b is perpendicular to the s plane. As shown in the figure below left, when there is an angle between the vertical plane of s and b, =b*s*cosRead phi four tones.

Unit: In the International System of Units, the unit of magnetic flux is Weber, and the symbol is wb, 1wb=1t*m2; =1v*s, which is a scalar quantity, but has a positive or negative, and the positive or negative only represents the direction of penetration.

Significance: The meaning of magnetic flux can be illustrated by magnetic inductance lines We know that in the diagram of the same magnetic field, the denser the magnetic inductance lines, that is, the more magnetic inductance lines passing through the unit area, the greater the magnetic inductance intensity b. Therefore, the larger the b and the larger the s, the greater the number of magnetic lines passing through this surface, and the greater the magnetic flux.

Q=it is a variant of the current intensity definition, where q is the amount of electricity flowing through a certain section of the conductor, i is the intensity of the current flowing through the conductor, and t is the energizing time.

Q indicates the electric power, indicates the current, and T indicates the time!

LC** circuits, that is, circuits in which a coil and a capacitor are connected in series. It is the basic circuit for the emission and reception of electromagnetic waves today.

In physics, PZ appears when talking about electrical power, such as PZ220V, 40W, which is an ordinary lighting bulb.

Uppercase means power, and lowercase means pressure or momentum.

It should mean impluse.

This is because the electronic energy meter converts electrical power into electrical pulses and counts them.

Indicates per kilowatt. The number of pulses per hour (i.e., one kilowatt-hour of electricity).

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This generally refers to the difference between the same physical quantity. For example, the difference in voltage is expressed in u.

The temperature difference is denoted by t.

The pressure difference is denoted by p. Wait a minute.

I hope it will be helpful to you, and I wish you progress in your studies! Wish!

p generally refers to pressure.

P(rou) refers to the density of an object.

There is also resistivity which is also denoted by p.

In physics, qu denotes the work done by the electric field force.

The electric field force does work that means that the charge is affected by the electric field force in the electric field, and to move, then under the action of the force, the displacement occurs, and there will be work, because it is the electric field force, so it is called the electric field force to do work. Calculation formula w=qu q charged body, uThe voltage (potential difference) between two points

, phonetic alphabet fa. In physics means:

1. Magnetic flux = bs in Weber (wb).

2. Fluctuating phase.

3. The phase of current and voltage.

4. The symbol of the electric potential.

5. Focus. =1 f (f is the focal length in m, then the unit is m (-1)), the eye power d = 100 (the power of the myopia lens is negative, the power of the farsighted lens is positive).

6. Indicates the size of the diameter.

1. "In physics, it is pronounced fai (uppercase, lowercase), which is the twenty-first Greek letter.

2. " In physics means:

1. Magnetic flux = bs in Weber (wb).

2. Fluctuating phase.

3. The phase of current and voltage.

4. The symbol of the electric potential.

5. Focus. =1 f (f is the focal length in m, then the unit is m (-1)), the eye power d = 100 (the power of the myopia lens is negative, the power of the farsighted lens is positive).

3. The Bulgarian alphabet of " " pronunciation: f (uppercase, lowercase), is the twenty-first Bulgarian alphabet.

4. " In mathematics it is described:

1) In the function y=asin(x+), it is indicated that the size of the translation is shifted left to the right.

2) In stereo coordinates, the angle between the straight line and the z-axis.

3) Volume fraction, the symbol is , when referring to the volume fraction of substance B, the symbol b or (b) is used, which is defined as: B = VB V0.

5. "In engineering: indicates the diameter of a cylindrical material device. For example, 10 is 10 unit diameters. According to the new version.

In 2011, the flat method was determined, and the upper right marked F is the new grade of steel bar produced by the latest steel bar standard, such as HRBF500 and so on.

Marked F on the top right.

6. "In heat transfer, it is expressed: it represents the heat flux, the symbol is , and the unit is w. Indicates the passage of a certain given per unit of time.

Heat for a fixed area.

Pronounced as epsilon, English epsilon (uppercase, lowercase), is the fifth Greek letter, R is the lower corner, you can read it directly.

The relative permittivity r can be measured by the electrostatic field in the following way: First, the capacitance c0 of the capacitor is measured when there is a vacuum between the two plates. Then, the capacitance cx is measured with the same distance between the plates but with a dielectric between the plates.

Then the relative permittivity can be calculated using the following formula: r=cx c0

The relative permittivity of dry air without carbon dioxide r= at standard atmospheric pressure. Therefore, the relative permittivity R is measured with a capacitance Ca in air instead of C0 with this electrode configuration. (Refer to GB T 1409-2006) For time-varying electromagnetic fields, the dielectric constant of a substance is frequency dependent, often referred to as the dielectric coefficient.

Velocity is equal to the distance traveled by a moving object per unit of time, and in physics, the ratio of distance to time and time is called velocity

So the answer is: distance; Time Changxiao

In the International System of Units, the unit of speed cruise ship is: m liquid grinding s; Reads as meters per second;

If the crawling speed of the turtle is, the physical meaning of the representation is: the distance that the turtle passes in 1 minute is.

So the answer is: m s; meters per second; The distance that the turtle passes in 1min is.

The distance is divided by the time, so the speed can also be said to be the ratio of the distance to the time.

The ratio of red balloons to yellow balloons is (3:4).

The opposite is (4:3).