Electric charge, which can be positive or negative, occurs in discrete natural units and is neither created nor destroyed. Electric force – Is the attraction or repulsion of particles or objects because of their electric charge it is one of the basic physical forces. Magnetic force – Is the attraction or repulsion that arises between electrically charged particles because of their motion; the basic force responsible for the action of electric motors and the attraction of magnets for iron. (Britannica, 2014) Britannica. 2014.
Continuous spectrum: a spectrum that exhibits all the wavelengths of visible light 13. Line Spectrum: a spectrum showing only certain discrete wavelengths 14. Quantum model: The quantum mechanical model is based on quantum theory, which says matter also has properties associated with waves. According to quantum theory, it’s impossible to know the exact position and momentum of an electron at the same time 15. Ground state: the lowest possible energy state of an atom of molecule 16.
86. ANS: The wavelength decreases; the amplitude and speed are not affected. 87. ANS: Light undergoes refraction, diffraction, and interference like all waves. Its energy depends on frequency, which is how a particle behaves.
5. Describe the law of conservation of energy! For any energy transformation, energy can be neither created nor destroyed, it can only be transformed. This law means that the total amount of energy in the universe is constant. When we use energy, it doesn’t disappear.
−570 B. −790 C. −860 D. −1080 (1) 4. A sample of a metal is heated. Which of the following are needed to calculate the heat absorbed by the sample? I.
638. The e/m value of cathode rays(rays of electrons) in a discharge tube is: A. 1. 6022x 1019 Coulombs Kg-1 B. 1.
By contrast, an electron in Bohr's model emits no energy, as long as its energy has one of the above-mentioned values. However, an electron which is not in the lowest energy level (n = 1), can make a spontaneous change to a lower state and thereby emit the energy difference in the form of a photon (particle of light). By calculating the wavelengths of the corresponding electromagnetic waves, one will get the same results as by measuring the lines of the hydrogen spectrum. Data |Quantum number |Radius (10-11) |Total Energy eV | |1 |5.29 |-13.60
This is the force resisting motion between the elements making up a solid material while it undergoes deformation. One very important element when it comes to friction is kinetic energy, which is the energy that an object possesses dude to its motion. Kinetic energy is converted into heat whenever two surfaces in contact move relative to each other. Heat is the energy transferred from one system to another via thermal interaction. Friction is not a fundamental force and it occurs because of the electromagnetic forces between charged particles, which constitute the surfaces in contact.
| | | Classical Physics laws were developed in the 20th century. | | | None of the above. | 1 points Question 2 1. The energy of the photoelectrons depends on the Frequency of the EMW. Answer | | yes | | | no | | | some times on frequncy | | | Some times on wavelength | 1 points Question 3 1.
1. INTRODUCTION Sir Isaac Newton produced three laws of motion. Newton’s second law of motion states that, “the acceleration (a) of an object is directly proportional to the net force acting on it and inversely proportional to its mass” (VUILLE, 86). This second law can be written into mathematical terms and written as: a = Fnet /m However, the equation above is more commonly seen as: Fnet = ma In these equations a represents the acceleration of the object, m is the objects mass Fnet represents the vector sum of all the forces acting on the object. The Atwood machine is an apparatus that explores the idea states above.