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Terms in this set (178)
hardware, software, firmware
What are the 3 major parts of a computer?
hardware
The physical components of the compute system
software
The logical parts of the computer
i.e. apps
firmware
Software that is embedded on hardware
binary
What is the basis for all computer logic
base 2
What base is binary?
8 bits
How many bits are in a byte?
Speed in b/sec
bits are used to denote what?
storage capacity
Bytes ares used to denote what?
1024
1000 is the Base 10 number rounded for this Base 2 number
power fluctuations, climate, dirt and debris
What are the major hazards to a computer?
brownout, blackout, spike, surge, noise
Types of power fluctuations
brownout
Reduced voltage level of AC power
blackout
complete loss of AC power
spike
Dramatic increase in voltage that only last a few milliseconds
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Verified questions
ENGINEERING
Hot water flows through a $PVC (k= 0.092 W/m \cdot K)$ pipe whose inner diameter is 2 cm and outer diameter is 2.5 cm. The temperature of the interior surface of this pipe is $50^\circ C$ and the temperature of the exterior surface is $20^\circ C.$ The rate of heat transfer per unit of pipe length is (a) 77.7 W/m (b) 89.5 W/m (c) 98.0 W/m (d) 112 W/m (e) 168 W/m
ENGINEERING
Stadium Capital Financing Group is a Chicago company that conceived the so-called sports mortgage wherein fans agree to pay a relatively large amount of money over a 10- to 30-year period for the right to buy top seats for football games for up to the next 50 years. In return, season ticket prices stay locked in at current year prices, and the package can be sold in the secondary market, while taking a tax write-off for donating to a school. Assume a fan buys a sports mortgage at West Virginia University for $150,000 that is to be paid over a 10-year period with the right to buy two season tickets for$300 each for the next 30 years. The first payment is made now (i.e., beginning-of-year payment), and an additional nine payments are to be made at the end of each year for the next 9 years. Assume the fan also purchases the two season tickets (also beginning-of-year payments). What is the total amount of the payment each year in years 0 through 9? Use an interest rate of 10% per year.
ENGINEERING
Why are high compression ratios not used in spark-ignition engines?
ENGINEERING
Refiigerant 134a is compressed from 2 bar, saturated vapor, to 10 bar, $90^{\circ} \mathrm{C}$ in a compressor operating at steady state. The mass flow rate of refrigerant entering the compressor is 7 kg/min, and the power input is 10.85 kW. Kinetic and potential energy effects can be neglected. a. Determine the rate of heat transfer, in kW. b. If the heat transfer occurs at an average surface temperature of $50^{\circ} \mathrm{C},$ determine the rate of entropy production, in kW/K. c. Determine the rate of entropy production, in kW/K, for an enlarged control volume that includes the compressor and its immediate surroundings such that the heat transfer occurs at 300 K. Compare the results of parts (b) and (c) and discuss.