This leaves a positive charge on one material and a negative one on the other, the charge depends on the material. Electrically charged objects attract small objects placed near them. Positive and negative electrostatic charges are only ever produced by the movement of the negative electrons, positive charges do not move. A positive static charge is created when electrons move away, and cause negative charges to move away as well. The key point that allows photocopiers, powder paint and precipitators work, is the face that objects with the same charge repel each other, whereas objects with opposite charges are attracted to each other.
The second part of the procedure holds F constant and investigates the relationship of a to m by altering the total mass of the system. Again, based on the equation a = F/m, acceleration and mass should be inversely related to each other. m = k/a and a = k/m. 2. PROCEDURE 2.1 Equipment & Materials The key piece of equipment used in this investigation is the Atwood machine.
Increase B. Decreases C. Remains the same D. Becomes zero Answer: A Explanation: Increase in the ionic character is accompanied by an increase in the rate of reaction. 637. Charged bodies when brought close exert force on each other. This force is dependent upon the distance between the charged particles and the value of charge on the particles. If the distance between the 2 charged bodies is halved, the force between them becomes: A.
In this process, the original atom will lose two neutrons and two protons, changing the element’s atomic number and mass, and subsequently making it into a different element. My model clearly and simply demonstrates this process due to the fact that it does not over complicate the process. I did not label the parent atom intentionally, to imply that this process can generally happen to almost any charged particle. Also, empty spaces are left in the atom to show that the particles that form the helium nucleus were released. On top of this, the helium nucleus is clearly labeled and is shown containing two neutrons and two protons (which are also labeled using an “N” and a “+”).
The electrons experience a magnetic force due to the field that is perpendicular to the velocity vector, so the electrons follow a circular path. By measuring the radius of the circular electron beam, the acceleration voltage and the current supplied, we can determine the charge to mass ratio. The value obtained was 1.00E11C/kg, which has a 30.65% percent deviation from the theoretical value. Introduction Velocity Vector Velocity Vector r r Electron Gun Voltage Controller Electron Gun Voltage Controller B B ΔV ΔV -Explanation: An electron is being shot by an electron gun/cathode gun. The electron is accelerating by being repelled by a negative plate and attracted by a positive plate.
The consequence is that only special values of radius and energy are allowed. The mathematical appendix explains how to calculate these values. According to classical electrodynamics, a charge, which is subject to centripetal acceleration on a circular orbit, should continuously radiate electromagnetic waves. Thus, because of the loss of energy, the electron should spiral into the nucleus very soon. By contrast, an electron in Bohr's model emits no energy, as long as its energy has one of the above-mentioned values.
Newton’s second law is: Force equals mass times acceleration F = m x a (1) On earth all mass accelerates downward toward the center of earth at 9.8 meters per second. Force is a vector and the direction must also be known. If two equal forces pull on a rope in opposite directions the rope will not move as the forces balance each other out, similar to what would happen in a “tug of war” game with equal forces on both sides. The main purpose of this experiment was to see if we could obtain a zero sum, equilibrium for a series of forces using measured direction by angle and measured weight so that forces equalized each other and added to zero. To determine vertical direction we used this equation for vertical distance.
Student designed practical investigation Title: Atwood’s Machine (Newtons 2nd law of motion). Partner: Qurban Aim: To explore how two different masses act with each other on a pulley and therefore calculate acceleration a (theoretical and experimental) and the Tension T. Hypothesis: When both masses are the same, there should be no acceleration. The larger the ratio between one mass and the other, the higher the acceleration should be. Materials: Pulley, string, mass 1 + 2, ruler, stopwatch, scissors Apparatus: Theory: Since we are trying to find a, the equations we need are: For experimental a: Transposed to: Theoretical a: For tension: where x = displacement u = initial velocity t = time taken = mass 1 = mass 2 Let Method: 1. Set up the apparatus in the diagram above.
Nuclear fusion however is the reaction in which two or more nuclei combine together to form a new element with higher atomic number. The fusion of two nuclei with lower masses than iron generally releases energy, while the fusion of nuclei heavier than iron absorbs energy. This means that fusion generally occurs for lighter elements only, and likewise, that fission normally occurs only for heavier elements. For a nuclear fusion reaction to occur it is necessary to bring two nuclei so close that nuclear forces become active and glue the nuclei together. Nuclear forces are small-distance forces and have to act against the electrostatic forces where positively charged nuclei repel each other.
On Earth the force of gravity causes all objects to accelerate at 9.8m/s^2. For example, say you have a mass of 1kg on the surface of the earth. The force of gravity between the two objects is given by: Fg= (6.673x10^-11)(5.9736x10^24)(1) (6.3781x10^6)^2 Fg = 9.8 m/s^2 6.672x10^-11 is the value of the universal gravitational constant (G), 5.9736x10^24 is the mass of the Earth (M1) in kg, 1 is the mass of our object on the earth's surface (M2) in kg, and 6.3781x10^6 is the distance between the center of the Earth and the Earth's surface (R) in meters. 9.8 m/s^2 is the acceleration force between objects and the earth On the moon