Answer the following Questions:
1. What are Home Row keys?
2. Why is it important to maintain a proper posture while working on a computer?
3. What is a pointing device? What is it used for?
What is the difference between a mechanical mouse and an optical mouse?
4.
Answers
Answer:
1)In order to maximize the range your two hands can reach on a keyboard, they should be positioned in the middle of the keyboard. Your left fingers should be resting on the letters A, S, D and F. And your right fingers should be resting on the keys J, K, L and semicolon. This set of eight keys is known as the home row.
2) If you sit at a desk and work on the computer for the majority of the day, your posture and workspace layout may be causing your neck or back pain. Correct ergonomics for your workspace, and proper postures are extremely important in preventing back pain that can lead to a non-accidental injury.
3) the mechanical builds with a ball inside the mouse and it touches a surface and rolls with the mouse. The optical mouse use laser beams and special chips to encode data for the computer. Trackball is a movable ball that mounted on top of the stationary device.
1.) The home keys are where you place your fingers when you are learning to type. The home keys include F, D, S, and A on the left of the keyboard, and J, K, L, and ; (semicolon) on the right of the keyboard.
2.) If you sit at a desk and work on the computer for the majority of the day, your posture and workspace layout may be causing your neck or back pain. Correct ergonomics for your workspace, and proper postures are extremely important in preventing back pain that can lead to a non-accidental injury
3.)
A pointing device is a type of input devices that allows a user to interact with a computer by moving a cursor on a monitor to select icons and trigger desired actions.
4.) mechanical mouse has a ball that turns rollers inside. If friction is lost between the ball and the mousing surface, or between the ball and the rollers, the mouse fails to work. In order to assure good contact with the mousing surface, the ball must be fairly heavy. When you change directions with the mouse, you must make the ball change rolling directions--an action that inertia likes to prevent.
An optical mouse makes use of an LED and some optics to detect surface texture and the changes in it as the mouse is moved. There are no moving parts. My optical mouse works on all the surfaces I've tried it on except the white plastic fold-up tables. For those, a piece of paper serves as a suitable "mouse pad".