Reference no: EM13230976
Consider the problem of using a low-voltage system to power a small cabin. Suppose a 12-V system powers a pair of 100-W lightbulbs (wired in parallel).
a. What would be the (filament) resistance of a bulb designed to use 100 W when it receives 12 V?
b. What would be the current drawn by two such bulbs if each receives a full 12 V?
c. What gage wire should be used if it is the minimum size that will carry the current.
d. Suppose a 12-V battery located 80-ft away supplies current to the pair of bulbs through the wire you picked in (c). Find:
1. The equivalent resistance of the two bulbs plus the wire resistance to and from the battery.
2. Current delivered by the battery
3. The actual voltage across the bulbs
4. The power lost in the wires
5. The power delivered to the bulbs
6. The fraction of the power delivered by the battery that is lost in the wires.
|
Develop an expression for the time to drain the tank
: The stepped cylindrical tank is initially filled with liquid water at STP to a height H1. Subsequently, a plug at the bottom of the tank is removed to allow water to flow from the small hole of diameter d. The velocity v of the flowing water
|
|
Plan for the denver international airport project
: Installation of a baggage handling system (BHS) was an important part of the plan for the Denver International Airport (DIA) project.
|
|
Evaluate the final partial pressures of a and b
: The vapor pressure of pure liquid A at 300K is 575torr and that of liquid B at 300K is 390torr. The molar volume of A is 0.0262L/mol and that of liquid B is 0.0306L/mol. Calculate the final partial pressures of A and B in the gas phase.
|
|
Explain the o2-binding to hemoglobin
: Highly active muscle generates lactic acid by respiration, Under these conditions, what happens to O2-binding to hemoglobin
|
|
What would be the current drawn by two bulbs
: Consider the problem of using a low-voltage system to power a small cabin. Suppose a 12-V system powers a pair of 100-W lightbulbs (wired in parallel). a. What would be the (filament) resistance of a bulb designed to use 100 W when it receives 12 V
|
|
Compute the work done if a gas is compressed
: Calculate the work done if a gas is compressed from 7.7 L to 1.3 L at constant temperature by a constant pressure of 2.6 atm, and give your answer in units of joules. (1 L · atm = 101.3 J) J In the above example, work is being done by what?
|
|
Compute the heat evolved when white phosphorus burn in air
: Calculate the heat evolved when 231 g of white phosphorus (P4) burns in air according to the equation below.
|
|
New product development process
: What project portfolio management elements are currently in place in Scott Paper's new product development process and how does Scott Paper's new product development approach reflect its overall business strategy?
|
|
Explain the energy in milk is converted to mechanical work
: a 51 kg person drinks 490. g of milk, which has a "caloric" value of approximately 3.0 kJ/g. If only 17% of the energy in milk is converted to mechanical work, how high (in meters) can the person climb based on this energy intake?
|