Ap Physics Lab

Kinetic Energy is the energy of movement, whether it is horizontal or vertical, it’s kinetic. There is many different types of kinetic energy. There is; vibrational, rotational and translational (the movement from one location to another. IN our experiment we also have kinetic energy. The particles that move around need kinetic energy to bond because if the particles wouldn’t have kinetic energy, they wouldn’t move, then they wouldn’t be able to collide and at last there would be no chemical reaction taking place. But for a reaction to take place there has to be enough kinetic energy to overcome the bonding forces of the reactants. The minimum amount of kinetic energy need to cause a chemical reaction is called activation energy (symbol: Ea

I have always excelled at math and science. Sophomore year, I had to decide whether I would take regents or honors physics in my junior year. I was already going to take AP biology, and I had planned on signing up for regents physics so that I wouldn't get too overwhelmed by science courses. Everyone warned me that honors physics was a tough class. However, I ended up taking the honors because my friend didn't want to be alone in that course. This is one of the best choices I've made in my life. I loved my honors physics class. Physics allows me to apply my math knowledge into real world situations that I can visualize and even test experimentally. Additionally, it requires me to problem solve and think problems through meticulously, which I love.

1. Find the westward component of a resultant vector 85.42 unit, 23º W of N.

The purpose of this lab was to test the relationship between velocity, position and time. As well as identify how accelerations affects an object's velocity and time. In this experiment, we will collect data on velocity, speed, and time. We used the equation Y=mx+b, in order to compare the velocity of each trial by comparing the slope and the y-intercept. If the slope was steeper on the graph, this meant that the cart had an increase in velocity. If the cart maintains at a constant speed, then the cart will have an increase in acceleration. In class we learned about the principles of acceleration, time, and velocity. Acceleration is an object’s increase in velocity. Velocity is how

In this experiment, the signal generator was set so that the frequency meter showed a reading of 1,803 Hz. The microphone was moved to a distance from the speaker so that the oscilloscope displayed a straight diagonal line. This position was of the microphone was recorded as the initial position, or beginning of a wavelength. The microphone was then moved farther in the same direction until the oscilloscope displays the same horizontal line. This position was recorded as final position, or the end of the wavelength. The distance between the two positions represents one wavelength for this frequency. This was repeated for frequencies of 2,402 Hz, 3,002, Hz, 3,602 Hz, and 4,201 Hz.

Batteries store energy in chemical form. They release energy by pumping electrons’ through wires from the minus pole to the plus pole. Devices inbetween convert this energy to another form, Efficieny- e.motor=85%, combustion= 20%

20. Because the magnetic force which deflects the electrons is defined by F = q * v x B

A car in a roller coaster moves along a track that consists of a sequence of ups and downs. Let the x

1. Infer whether the size of an object’s displacement (amount of units between start and stop) could be greater than the distance the object travels.

( Engaging statement. Why is this investigation of Crumple Zone Physics relevant? General topic information)

Measurements of diffusivity include fractional anisotropy and radial diffusivity. Fractional anisotropy (FA) and radial diffusivity (RD) are measurements of directionality of diffusion. A FA value of 0 represents unrestricted diffusion in all directions (isotropic) while a value of 1 represents diffusion along only one axis (anisotropic). Increased radial diffusivity is thought to represent a loss of myelin. Abnormalities on DTI are thought to reflect loss of white matter microstructural integrity, as seen in traumatic axonal injury. DTI is more sensitive for DAI than conventional MRI. DTI has shown that mTBI can be associated with widespread structural changes in cortical white matter tracts and the integrity of those have been shown to correlate with behavioral and cognitive measures. Changes in diffusivity indexes may indicate different types of white matter abnormality and different stages post injury after mTBI. Kou et al. reported that DTI fractional anisotropy (FA) can either decrease or increase in the acute setting. DTI FA values normally increase, and/or radial diffusivity (RD) decrease and/or apparent diffusion coefficient (ADC) decrease in the first week post-injury. Octavian et al. showed reduced FA on diffusion tensor imaging in the right superior longitudinal fasciculus in participants with mTBI31(Figure) More than 2 weeks post injury, either a

Traumatic Brain Injury (TBI) has emerged as a significant health issues during current the course of current conflicts in Afghanistan and Iraq, which affects military service members and veterans during the times of both peace and war. Other than the blast related TBI, which is mostly experienced by service members in war zone, a large no of civilian populations approximately 1.5 million per year suffer from non-blast traumatic brain injuries caused by car accidents, fall, sports-related accidents or assaults. Axonal damage is known to be the primary pathophysiological feature of blast related TBI. However, understanding the effect of axonal injury in brain connectivity is difficult to diagnose in living patients. Advancement of more sophisticated imaging technology like Diffusion tensor imaging (DTI) and Resting state fMRI correlation analysis (fcMRI) may help us not only to learn more about these injuries but also will facilitate the diagnosis or treatment plan for individuals suffering

2) Correctly position the impact tip in the center of the head and establish the zero point before impacting. Unlike open head injury, the impact tip positioning is relatively difficult. First, the size of the impact tip and the impact center affect the injury degree and lesions. An optimized 9mm tip is used in this protocol. Based on mouse brain anatomy, the impact center is designed to correspond to the central sagittal suture midway between coronal and lambdoid sutures. To positioning a correct injury site, the impact tip must be adjusted to the target coordinates above the sagittal suture midway and one edge of the impact tip must be vertical parallel to an imaginary horizontal line drawn between the two ears. Due to the 9mm diameter

Task Description:The world communicates by making extensive use of the electromagnetic spectrum. For the average person this is commonly accessed using radio waves. These radio waves may be over the AM or FM radio wave bands or the radio waves that transmit our television signals. Not only are people always within a ‘phone call of each other anywhere in the world they are also able to find out exactly where in the world they are by use of

TBI was performed in accordance with the protocol described elsewhere.[17,18] Rats weighing (250-300 g) were anesthetized using a mixture of ketamine (75 mg/kg i.p.) and xylazine (5 mg/kg i.p.). A 1 cm midline scalp incision was made and the muscles were retracted to expose the skull. A stainless steel disc (10 mm in dia. and 3 mm in depth) was placed centrally between the lambda and bregma sutures. Injury was then induced using impact acceleration model of TBI. A 400 g metal weight was dropped from a height of 1 m guided through straight pipe (Length: 1 m; Diameter: 35 mm), onto the metal disc placed over the rat’s skull. A 10 cm foam bed underneath the animal helped to absorb the impact.[19] After the impact, the metal disc was removed and