IB Physics HL Lab Report on Projectiles Essay Example

IB Physics HL Lab Report on Projectiles Essay Even if the actual measured results differ sensibly from the hypothetical values, we can clearly see that an inclination of 45 degrees generates a much longer distance travelled horizontally. During our experiment, water pressure was not constant and there could have been some fluctuations due to wind variation. Those uncertainties must be taken into consideration. Conclusion and Evaluation Our mathematical proof and hypothesis were right that in parabolic motion, 45 degrees offers the greatest horizontal distance travelled. The values recorded with an actual projectile and the values from the mathematical demonstration are not similar. But the general tendency of results is about the same. An angle of 45 degrees generates the longest distance travelled horizontally by a projectile and can be considered as the optimum angle. The variations of measurements made at 30 and 60 degrees are about the same as those calculated. The reason why the actual projectile registers greater horizontal values than in the mathematical proof is that the water pressure (Velocity of water) is larger than that what we assumed (10m/s) at first. In this experiment, honestly speaking, we would better try to find another method to get the data than from a hose directly connected to the water mains. We will write a custom essay sample on IB Physics HL Lab Report on Projectiles specifically for you for only $16.38 $13.9/page Order now We will write a custom essay sample on IB Physics HL Lab Report on Projectiles specifically for you FOR ONLY $16.38 $13.9/page Hire Writer We will write a custom essay sample on IB Physics HL Lab Report on Projectiles specifically for you FOR ONLY $16.38 $13.9/page Hire Writer The water pressure of Vietnam is not so stable. Even if it seems constant, there are sensible variations. For instance, when keeping the same position and angle, the hose spurted water with very different results. Sometimes the difference observed was more than one meter. Unstable water pressure may have lead to different velocities and different values. For the purpose of this experiment, we recorded the area where that water was mostly dropped. Additionally, we think that the wind factor should be considered, as the experiment was taking place outdoors. It may have affected the values in a considerable way. Some suggestions to improve the investigation may include carrying the experiment indoors as the results would not be affected by frontal and lateral wind interferences. It may also be sensible to find a source of water spray with a constant velocity. A canister of pressured water, or a projectile powered by a compressed gas would have a more constant velocity. The values registered might also be more accurate if we used a CCD camera to capture the trajectory of a small ball such as a bead.

The Good Times are Killing Me

The Good Times are Killing Me If you are looking for a compelling play for a young mixed-race cast, you may want to take a look at The Good Times are Killing Me by Lynda Barry. This play, published in 1993, offers two strong female roles in which teenagers can play teenagers  and a multiplicity of issues to discuss with cast and crew during rehearsals and with audiences in talkbacks. Format This is a two-act play, but it is unusual in that it is comprised of 36 short scenes or vignettes- 26 in Act One and 10 in Act 2. The story is adolescent Edna Arkins’s story. She is the main character and she appears in every scene; she breaks the fourth wall and speaks to the audience before, during, and after interacting with the other characters. Each vignette has a title like RECORD PLAYER NIGHT CLUB or BEST FRIENDS that communicates the essence of the scene. The scenes- some only a half page long, some three pages long- reveal the story of friendship between two adolescent girls- one white and one black- in mid-1960s America. One vignette flows into the next creating a collection of scenes that reveal the difficulties of coming of age in the midst of family heartaches, personal growing pains, and racial prejudices. Cast Size There are roles for 16 females and 8 males. Broken down by race, the play calls for 10 white females and 6 black females, and 3 white males and 5 black males. Doubling in roles is possible, resulting in an overall minimal cast size of 16. Roles Edna Arkins: A white 12-13 year-old girl who lives with her family in a house on a city street that has slowly become integrated Lucy Arkins: Edna’s younger sister Edna’s Parents and Extended Family: Mom, Dad, Uncle Don, Aunt Margaret, Cousin Steve, and Cousin Ellen Bonna Willis: A black 12-13 year-old girl who recently moved into Edna’s neighborhood Bonna’s Parents and Extended Family: Mom, Dad, younger brother Elvin, and Aunt Martha Recurring Minor Roles: Two black teenagers named Earl and Bonita, and Cousin Ellen’s friend Sharon Ensemble: There are multiple scenes that would be enhanced by friends, neighbors, classmates, and other people. There are also several small roles- a teacher, a mother, a pastor, a Girl Scout leader and her daughter. Set and Costumes Most action occurs on the porches, street, yards, and kitchens of Edna’s and Bonita’s houses. Other settings are Edna’s basement, a campsite, a meeting room, a tough neighborhood, a church, and a school hallway. These can easily be suggested with lighting or a few moveable small set pieces. The time period of this play is critical to the story, so the costumes need to be early 1960s American clothing- mostly casual and inexpensive-looking. Music Songs and singing occur throughout this production, providing mood, underscoring emotions and actions, and contextualizing the story in 1960s urban America. Much of the singing occurs with the records that the characters play; some singing is a capella. The script identifies the precise songs and provides lyrics within the text or in an appendix. Content Issues Much of the content and language of this play seems so innocent given the 20-plus years since its opening night and its setting of 50-plus years ago. Even so, it’s worth noting that the play deals with marital infidelity, racial discrimination (One of Edna’s lines mentions the â€Å"No Negro Kids Can Come in Our House Rule.), and the accidental drowning of Bonna’s brother. The language is relatively tame, but the dialogue does include the words   Ã¢â‚¬Å"ass,† â€Å"boodie,† â€Å"pimp,† â€Å"butt,† and the like. There is, however, no profanity. Lynda Barry also published this story as a 144-page novel with Edna as the narrator. If you would like to hear Lynda Barry talk about her life work, please visit Accessing the Imaginary. Here is a video trailer of a high school production of the play.

Psychological disorders and how they affect every day life Essay

Psychological disorders and how they affect every day life - Essay Example Bipolar disorder mainly affects those in the adult stage of life and it lasts a lifetime and very few cases of Bipolar disorder have been reported in childhood. Bipolar disorders are characterized by extreme mood changes that cause patients to exhibit inconsistent moods and feelings. The condition, if not well managed, can be a cause for stress and agony for both the victim and the family members who are affected indirectly or directly by the sharp mood fluctuations of their loved ones as a result of the Bipolar disorder. While the manic state leads to dangerous behavior, the depressive state for Bipolar disorder can result into suicide. This paper further looks at incidences of misdiagnosis, as well as the available treatments for the Bipolar disorder. Bipolar disorders are manifested in various forms such as suffering from mania state as well as depressions state which interrupts the patient's normal way of life such as sleeping, eating, studies for students, as well as many other parts of life such as relationship in marriage given that such mood swings affects how couples, partners and spouses communicate with one another (Soares, & Mann, 1997.26-76). The seriousness of the Bipolar disorder is such that it can result into a sense of hyperactivity in an individual whereby a patient, full of energy gets easily excited and energized to such high levels that they may get involved in uncontrollable behavior (American Psychiatric Association, 1994). The fact that Bipolar disorder is hard to predict, control due to sudden mood changes makes its diagnosis a hard task, something that has resulted into misdiagnosis in the past (American Psychiatric Association, 1994.43-59). Bipolar disorder is known to be caused by a wide range of factors all tied to genetics or environment and are linked to the brain (Soares, & Mann, 1997.54-74). Soares, and Mann, (1997.61-74) further notes that, biological factors such as imbalance of neurotransmitters, triggers such as; unexpected or major life events are possible causes of Bipolar disorder although research in this area is ongoing and new evidence can come up in the next few years. The Bipolar disorder consists of the following episodes according to (Hyman, & Rudorfer, 2000.78-125) - depression, mania, hypomania as well as mixed moods. Depression mood episode refers to a situation whereby the Bipolar disorder patient experiences long durations of sadness, laziness that makes the bipolar patient to experience unusually difficulties in waking up and/or taking meals. Mania mood episode results into hyperactivity characterized by risky behavior which can cause harm to those around the patient. Hypomania mood episode exhibits symptoms similar to those of mania, although Hypomania symptoms are less severe. Hypomania is characterized by false 'good' feeling although this can sometimes degenerate into other mood episodes such as depression and mania, which can lead the patient into engaging in the risky behavior characteristic to mania episodes. Mixed mood episode is the condition whereby, the patient experiences symptoms of mania and depression in a single day, something which means that the bipolar patient can be overwhelmed by the mood changes. In addition, Bipolar disorder is a condition that lasts a whole life time and therefore the better it is managed, the more the quality of life a patient is exposed to. Also proper medication are preferred and recommended