75uS is the time constant used for a high-pass filter to enhance the high frequency audio before transmission to help reduce noise upon reception. The PLL is the portion of the IC which locks your chosen transmission frequency to the crystal reference X1. The PLL portion also contains an oscillator circuit which works in conjunction with the external parts of D5 and the STUB (that weird trace on the back of the board). D5 is called a varactor diode, and is a special variety of diode that is connected backwards. As a reverse DC voltage is applied across the diode, its capacitance varies.
Answer: Take the power of the objectives then multiply them by the power of the eyepiece by 10x. (4 points) |Score | | | 2. Explain how to focus a microscope using the high power lens. Include any safety issues you need to be aware of. Answer: To focus a high power lens you need to turn the knob using the scanning lens after that you need to rotate the high power lens.
Multifocal eyeglass lenses contain two or more lens powers to help you see objects at all distances after you have the ability to naturally change the focus of your eyes due to presbyopia. Bifocals contain two lens powers while trifocals contain three. Progressive multifocal lenses change in power from the top half of the lens to the bottom, and contain many lens powers. Multifocal lenses usually are prescribed for adults over age 40 from presbyopia, in other cases bifocals are prescribed for children and young adults who have focusing problems that cause the eye to strain when reading. The bottom portion of the bifocal lens converge the amount of focusing effort to see near objects clearly.
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.
All lenses have a principal axis which is a line which passes through the middle of the lens. The focal points of all lenses are in front and behind the lens and are where the light rays initially parallel to the principal axis meet. This directly affects the focal length. Factors the affect focal length | How it affects focal length | Thickness | The thicker the lens is the more the light will be refracted creating a shorter focal length. | Medium | Light travels at different speeds in different mediums, as they can be more or less dense.
The data includes information on thirty five vehicles of many different years, colors, styles, and features. Due to the many different styles and features available on the vehicles, developing a comfortable selling price can be very difficult. This report will use statistical analysis in order to explore which of the available features effect the sales price of the vehicle. Several of the tests we will perform called Hypothesis Tests allow us to determine the likely hood that a feature has some effect on the selling price of the Mustang. Other tests will include the mean (average), maximum, and minimum, prices (Figure A3) of the sample information some of which will be used as data for additional tests.
• It increases when individuals focus on connecting with others. 4. In order to focus your presentation on people, you should: • use a lot of "I" statements • include as many photographs as possible in your slides • make individuals and groups the subject of your sentences • avoid using presentation software or other technology Final Exam Answers just a click away COM 295 Final Examination 5. _____ is the process of converting meaning into messages composed of words and nonverbal signals. • Filtering • Encoding • Decoding • Translating 6.
This is the one of the most essential ways of distance communication to connect to people around worldwide. It has the pros of having to see the person you are talking to so you can have more of an effective way of communicating. Also travel costs and time taken to travel costs is reduced significantly. However on the other hand, if the Internet bandwidth is low there may be lagging in the video. To be able to do video conferencing you will need a computer, a webcam, a microphone, speakers, and Internet access and video conferencing software.
Magnetic compasses can provide direction immediately, so the magnetic compass is simpler. Because the magnetic needle relies on the earth’s magnetic field, it always shows which way is north (Lane 128). Navigators can use a map with the direction provided by the magnetic compass to reach their destination. In contrast, the astrolabe cannot provide position directly. Navigators can use the astrolabe to measure the position of the Sun and the bright stars and combine the information from the metal plate for adjustable latitude (Figure4).
Today studios use SMPTE time codes to help synchronize tape machines. During the recording of “ A Day in the Life”, Townsend synchronized two machines to make extra tracks available for recording the orchestra. He used a 50Hz tone on the remaining track on one machine and used that tone to control the second machine’s speed (Lewisohn). In today’s use of a SMPTE controlled recorder, it provides a mechanism so that the second tape will automatically line up with the master tape and synchronize the start and stop of each recording. With the sample tone used in “ A Day in the Life”, the beginning position had to be marked with a wax pencil on both machines, the operator had to line the marks by eye, and attempt to push play and record simultaneously (Emerick & Mussey).