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Was the energy a scalar or a vector? Teacher said it was a scalar ~ but why is everyone still talking about positive energy and negative energy? Since it is a scalar, there is no direction. According to everyone, energy is a vector ~ Is energy scalar or vector? The teacher said it was a scalar ~ but why are you still talking about positive energy and negative energy ~ Since it is a scalar, what direction is there?~ According to everyone, energy is a vector ~ or the teacher is wrong ~ Is energy scalar or vector? The teacher said it was a scalar ~ but why is everyone still talking about positive energy and negative energy ~ since it is a scalar, what direction is there?~ According to everyone, energy is a vector ~ or the teacher is wrong ~
Physical energy is a physical quantity that measures the motion of matter. It is a scalar quantity. Corresponding to different forms of motion, energy is divided into mechanical energy, intramolecular energy, electric energy, chemical energy, atomic energy, etc. It is only a measurement, regardless of direction.
We usually see the media say, positive energy, negative energy.
For example, sanitation workers fainted on the road due to heat stroke, people holding umbrellas and alarming others.
Negative energy is the embodiment of civilization, social retrogression phenomenon.
The media say that energy is positive and negative is an image.
Vector, scalar, vector Each quantity is described in as few words as possible
Vector: A quantity that has both magnitude and direction, such as velocity, acceleration, force, and displacement. Generally, it is called vector in physics and vector in mathematics. Scalars are also called "vectorless ". Some physical quantities have only numerical magnitude but no direction. The operation between these quantities follows the general algebraic law, called...
Which are scalar and which are vector In the high school, besides displacement is vector, length, temperature, energy, mass is scalar, what else? Which are scalar and which are vector In high school, besides displacement is vector, length, temperature, energy, mass is scalar, what else?
Vector: force (including "force" in mechanics and "force" in electricity), linear velocity, angular velocity, displacement, acceleration, momentum, impulse, angular momentum, field strength, etc.
Scalar: mass, density, temperature, work, power, kinetic energy, potential energy, gravitational potential energy, potential energy, path, velocity, volume, time, heat, resistance, torque, path, etc.
Vector: force (including "force" in mechanics and "force" in electricity), linear velocity, angular velocity, displacement, acceleration, momentum, impulse, angular momentum, field strength, etc.
Scalar: mass, density, temperature, work, power, kinetic energy, potential energy, gravitational potential energy, potential energy, distance, speed, volume, time, heat, resistance, torque, distance, etc.
Is the vector multiplied by the vector result a vector or a scalar, and is the vector multiplied by the scalar result a vector or a scalar?
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What is vector, scalar
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Is time scalar or vector
[Vector] is also called "vector ". Some physical quantities are completely determined by the magnitude and direction of the value. The operation between these quantities does not follow the general algebraic rule, and they follow the geometric operation rule when adding and subtracting. Such quantities are called" physical vectors ", such as velocity, acceleration, displacement, force, impulse, momentum, electric field strength, magnetic field strength... E.g. are vectors. They can be represented by bold type (e.g. F) or letters with arrows
Scalars are also known as "vectorless ". Some physical quantities have only numerical values, but no direction. The operation between these quantities follows the general algebraic law. Such quantities are called" scalar ". Such physical quantities as mass, density, temperature, work, energy, distance, rate, volume, time, heat, resistance, etc. No matter which coordinate system is selected, the scalar value remains unchanged. The product of vector and scalar is still vector. The product of vector and vector can form a new scalar or a new vector. The product of vector and scalar is called scalar product. The product of vector is called vector product. The calculation of work and power is the scalar product of two vectors.
So time is scalar!
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- 2. What is a vector? Scalar? Number of generations? For example: displacement is vector, distance is generation, What is a vector? Scalar? Number of generations? For example, displacement is vector, distance is generation,
- 3. Acceleration is vector or scalar, Such as title
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- 6. Coordinate representation of vectors Two straight lines are respectively x and y, intersect with point O in the same plane,∠xOy=60°, and any point P in the plane is defined as follows with respect to this coordinate system: The two lines are respectively x and y, intersect with point O in the same plane,∠xOy=60°, and any point P in the plane is defined in this coordinate system as follows: if the vector of OP=xe1+ye2(where e1 is the unit vector in the same direction as the x axis and y axis respectively), then the oblique coordinate of point P is (x, y) (1) If the oblique coordinate of point P is (1,-2), find the distance from P to O. (2) If a circle with O as its center and 1 as its radius is an equation in the oblique coordinate system xOy
- 7. Given the plane vector OP=λOA OB, R, then the necessary and sufficient conditions for the colline if and only if If the plane vector OP=λOA OB, R, then P, A, B are collinear if and only if
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- 10. The formula for calculating the area of a parallelogram is ______.
- 11. The absolute value of vector a is known to be equal to root number 2, the absolute value of vector b is known to be equal to root number 3, and the angle between vector a and vector b is 45 degrees Find the value range of λ whose angle between a vector b vector and λa vector +b vector is an acute angle. The absolute value of vector a is known to be equal to root number 2, the absolute value of vector b is known to be equal to root number 3, and the angle between vector a and vector b is 45 degrees The the value range of λ whose angle between a vector b vector and λa vector +b vector is an acute angle.
- 12. Set vector groups a1, a2... An is linearly related and a1 is not equal to zero proves that there is a vector ak (2 Don't paste the problem in Baidu, that is not very detailed, anyway I do n' t understand... Let the vector group a1, a2... An is linearly related and a1 is not equal to zero proves that there is a vector ak (2 Don't paste the problem in Baidu, that is not very detailed, anyway I do n' t understand... Let the vector group a1, a2... An is linearly related, and a1 is not equal to zero proves that there is a vector ak (2 Don't paste the problem in Baidu, that is not very detailed, anyway I do n' t understand...
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- 15. Point A (-3.2), point B (3.6), point C satisfies vector AC = vector CB, then vector AB is multiplied by vector AC =?
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- 17. Two with size and direction are called vectors. Two with size and no direction are called scalars. What is the length? What is the force? The blank line is short Two vectors with magnitude and direction are called vectors with magnitude and no direction are called scalars. What is the length? What is the force? Empty question line is very short
- 18. 0
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