The static magnetic field exerts a magnetic force that can dislodge the pacemaker leads. On a brighter note the more modern up to date pacemakers are smaller and have less moving parts. They have leads that are less susceptible to the magnetic force and have a lower risk factor of being moved. (Ahmed, et al., 2013) The radiofrequency field effects the pacemaker differently than the static magnetic field. It can actually heat the lead used in the older models.
Thermal runaway reaction occurs when the heat generated by a reaction goes beyond the heat removal caused by the available cooling capacity. Heat is accumulated leading to a gradual rise in the temperature of the reaction mass; this causes an increase to the rate of reaction and increases the speed of rate of heat generation. [1] Why are thermal runaway reactions dangerous on industrial scale? Thermal runaway reactions are always said to be dangerous on an industrial scale since the reactions go faster in an industry where they tend to reach higher temperatures. As you would already know that exothermic reactions tend to release quite a large amount of heat, so when the reaction mixture gets very warm, a very hot exothermic reaction begins.
As a reverse DC voltage is applied across the diode, its capacitance varies. The higher the voltage, the less the capacitance. This is due to depletion layers of the diode junction, but we wont get into details here. This variable capacitor in conjunction with the stub, which is actually an inductor (coil) is the basis of our voltage controlled oscillator! As the voltage increases across D5, the frequency of oscillation increases.
The second one could have iron +2 and copper +2. The third one could have used iron +3 and copper +1 and the last one could have iron +3 and copper +2 There are several factors that can influence the rate of a chemical reaction. In general, a factor that increases the number of collisions between particles will increase the reaction rate and a factor that decreases the number of collisions between particles will decrease the chemical reaction rate. The factors that can influence the rate of a chemical reaction are: the concentration of reactants, the temperature, the medium and the presence of catalyst and competitors. The higher the concentration of reactants is, the higher the rate of a chemical reaction is.
Polycythemia is an increase in red blood cells, which would increase the viscosity and decrease flow. ACTIVITY 3 Studying the Effect of Blood Vessel Length on Blood Flow Rate 1. Which is more likely to occur, a change in blood vessel radius or a change in blood vessel length? Explain why. Increase in blood vessel radius is more likely to occur.
Reaction rate is affected by any catalysts present (which speed up the reaction usually with an intermediate step), temperature (increases the number of particles collisions), concentration (increases the number of collisions), and surface area (increases the space available for collisions). Reactions can only occur when collisions take place. The most generic form of the rate law is Rate = K * [A]m * [B]n where (k is a constant specific to an equation and temperature). Now, the compounds A and B might not have any effect on the rate, which would cause them to drop out of the equation completely, or they might have so much effect that they are raised an order (squaring the concentration). The rate law for this reaction is k [CV+]m[OH-]n. Since the hydroxide ion concentration at the beginning is about 1000 times larger than the concentration of crystal violet, [OH-] will not change that much during this
For first harmonic, our wavelength was 1.200 m, found by the formula λ=2L/n. In the second part we used tension and velocity to find mass density. For the first notch, with a tension of 10.3 N, the velocity was 86 m/s with a overall mass density of 0.018. Discussion In the lab we wanted to find the frequency at which resonance occurs on a stretched wire as well as look at the relationship between the frequency of vibration and tension and linear mass density of the wire. For the first procedure, we increased the frequency until we found resonance, and recorded frequencies and nodes to calculate wavelength.
I also predict that doubling the concentration of acid will require double the amount of alkali to reach an end point. This would be due to there being more hydrogen ions present in a more concentrated acid, and therefore more OH- ions needed to neutralise these. When concentration doubles, this means there is twice as many H+ ions; therefore twice as much alkali will be needed to balance them out. Apparatus list:
As the temperature increases the molecules within the beetroot are given more kinetic energy and thus the process of diffusion is speeded up. From 40°C to 62°C there is a sudden increase in the absorbency reading, which indicates that the cell the cell walls of the beetroot are being denatured. For example, at 40°C the mean absorbency was 0.197 compared to the 62°C were the mean absorbency was 1.704. as the
The first factor that must be considered is the viscosity of the magma. This can determine how powerful an eruption is and what shape the volcano eventually becomes. Viscosity can be affected by three main factors, firstly, the higher the temperature, the lower the density of the magma, causing it to flow more easily. Secondly, the greater the amount of dissolved gases in the magma, the less viscous it will be, and lastly the higher the silica content, the more viscous it will be. Thicker, more viscous magma has a greater potential for explosive eruptions and therefore represent the greatest potential hazards.