This topic contains a solution. Click here to go to the answer
« previous next »

Author Question: A metal wire has a resistance of 25.00 W under room temperature conditions of 25C. When the wire is ... (Read 182 times)

bb

  • Hero Member
  • *****
  • Posts: 544
on: Jul 28, 2018
A metal wire has a resistance of 25.00 W under room temperature conditions of 25C. When the wire is heated to 85C the resistance increases by 1.95 W. What is the temperature coefficient of resistivity of this metal?
 a. 1.3  10-3 (C)-1
  c. 5.0  10-4 (C)-1
  b. 1.5  10-3 (C)-1
  d. 2.5  10-3 (C)-1

Question 2

If the column of mercury in a barometer stands at 69.4 cm, what is the atmospheric pressure? (The density of mercury is 13.6  103 kg/m3 and g = 9.80 m/s2.)
 a. 0.968  105 N/m2
  c. 0.925  105 N/m2
  b. 1.03  105 N/m2
  d. 1.07  105 N/m2


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

cuttiesgirl16

  • Sr. Member
  • ****
  • Posts: 345
Reply #1 on: Jul 28, 2018
Answer to Question 1

A

Answer to Question 2

C


bb

  • Member
  • Posts: 544
Reply 2 on: Jul 28, 2018
Gracias!

laurnthompson

  • Member
  • Posts: 334
Reply 3 on: Yesterday
Thanks for the timely response, appreciate it

« previous next »
 

Did you know?

The average human gut is home to perhaps 500 to 1,000 different species of bacteria.

Did you know?

Lower drug doses for elderly patients should be used first, with titrations of the dose as tolerated to prevent unwanted drug-related pharmacodynamic effects.

Did you know?

If you use artificial sweeteners, such as cyclamates, your eyes may be more sensitive to light. Other factors that will make your eyes more sensitive to light include use of antibiotics, oral contraceptives, hypertension medications, diuretics, and antidiabetic medications.

Did you know?

An identified risk factor for osteoporosis is the intake of excessive amounts of vitamin A. Dietary intake of approximately double the recommended daily amount of vitamin A, by women, has been shown to reduce bone mineral density and increase the chances for hip fractures compared with women who consumed the recommended daily amount (or less) of vitamin A.

Did you know?

In the United States, an estimated 50 million unnecessary antibiotics are prescribed for viral respiratory infections.

Bill Viola, Room for St. John of the Cross. Bill Viola, Room for St. John of the Cross.
Measuring Temperature Using a Tympanic Membrane (Aural) Thermometer Measuring Temperature Using a Tympanic Membrane (Aural) Thermometer
Typical engine analyzer hookup that includes a scope display. (1) Coil wire on top of the ... Typical engine analyzer hookup that includes a scope display. (1) Coil wire on top of the ...
A downward-sloping spark line usually indicates high secondary ignition system resistance or an ... A downward-sloping spark line usually indicates high secondary ignition system resistance or an ...
Severe hash is almost always caused by cylinder misfire conditions. Severe hash is almost always caused by cylinder misfire conditions.
The relationship between RH and temperature. The relationship between RH and temperature.
Video: Coronary Heart Disease Animation

For a complete list of videos, visit our video library