Determine how many times greater heat loss occurs

Assignment Help Physics
Reference no: EM13103542

Determine how many times greater heat loss occurs through a glass window thats 80.0 cm high, 70 cm wide, and 0.300 cm thick (k = 0.791 W/m°C) than a electrical supply line running outside to an exterior mounted light. This 30.0 cm long supply line consisting of three copper wires, each 1.50 mm in diameter, that are well insulated and only exposed at the very ends of each wire. The thermal conductivity of copper is 395 W/m°C. Hint: Since this problem is a direct comparison, it really won't make any difference what you choose for inside and outside temperatures.

Reference no: EM13103542

Questions Cloud

Calculate the image position and height : A 3.1-cm-tall object is 47 cm in front of a converging lens that has a 11.8 cm focal length. Calculate the image position and height. position cm height cm.
What kind of sampling should do : Presume that 5,000 sales invoices are separated into four strata. Stratum 1 contains 50 invoices stratum 2 contains 500 invoices stratum 3 contains 1,000 invoices and stratum 4 contains 3,450 invoices. A example of 500 sales invoices is needed.
Summarizing the primary components of the article : topic by providing a paragraph summarizing the primary components of the article and a second paragraph presenting your analysis of the article (Do you agree/disagre
Probability of public transportation : Suppose 5.9% of certain population use public transportation to get to work. You randomly select 380 workers and ask them if they use public transportation to get to work.
Determine how many times greater heat loss occurs : Determine how many times greater heat loss occurs through a glass window thats 80.0 cm high, 70 cm wide, and 0.300 cm thick (k = 0.791 W/m°C) than a electrical supply line running outside to an exterior mounted light.
Describe what the hundleys are trying to accomplish : Each year, the Hundleys usually have itemized deductions of $9,500, including a $3,600 pledge payment to their church. Upon the advice of a friend they do the subsequent in early January 2010, they pay their pledge for 2009 during the 2010, Descri..
What is the mass of the copper block : A copper block is removed from a 300°C oven and dropped into 1.00 kg of water at 20.0°C. The water quickly reaches 26.5°C and then remains at that temperature. What is the mass of the copper block?
Compute irr-npv and payback for both projects : Compute IRR, NPV and payback for both projects. Show all calculations.
What would the image distance : what would the image distance be (pay attention to sign)? cm d. Could the new image be projected on a screen?

Reviews

Write a Review

 

Physics Questions & Answers

  What are the strength and direction of the field

Positive charges with magnitudes 3.50 mC and 6.75mC are located at the origin and at the point (10,0) metters on the x axis, respectively. What are the strength and direction of the field they generate at the point (0,10) on the y axis?

  How long after its release does the mailbag reach the ground

When a train's velocity is 12{rm{ m/s}} eastward, raindrops that are falling vertically with respect to the earth make traces that are inclined 30.0 ^circ to vertical on windows of the train.

  What is the magnitude of the resultant vector f

Consider two vectors where F_1= 84 N, F_2 = 46 N, theta_1= 5 degrees, and theta_2 = 144 degrees, measured from the positive x axis with the counter-clockwise angular direction as positive. What is the magnitude of the resultant vector F = F_1 + F_..

  Find out the focal length of the convex mirror

A high-speed photograph of a club hitting a golf ball. The club was in contact with a ball, initially at rest, for about 0.0028s. If the ball has a mass of 55 g and leaves the head of the club with a speed of 1.8 102 ft/s, find out the average forc..

  What is the wavelength of the radio waves

Announcers at a certain radio station say that they are at "95 FM on your dial," meaning that they transmit at a frequency of 95 MHz (95 megahertz, or 95 million cycles per second). What is the wavelength of the radio waves from this station?

  What is the decibel level of street

On a workday an average decibel level of the busy street is 89 dB, with 100 cars passing a given point every minute. If the number of cars is reduced to 30 every minute on a weekend, what is the decibel level of street.

  How far into the fence post did the bullet penetrate

You work for a moving company and are given the job of moving two crates (masses are 130kg and 280kg) held together by a rope attached between the two. You pull on a rope attached to the larger crate giving the system the acceleration of 0.29m/s2. Wh..

  Find speed at which the ball left the quarterbacks hand

find speed at which the ball left the quarterback's hand.

  What is the angle q and tension in the string

A 5.00 X 10-2 kg mass with a charge of +0.75 mC is hung by a thin insulated thread. A charge of -0.9 mC is held 0.15 meters directly to right so that the thread makes an angle q with the vertical. What is the angle q and the tension in the string.

  Demonstrate that gravitational energy is not extensive

Demonstrate that gravitational energy is not extensive: show that the gravitational energy of a sphere of radius 'r' and uniform density varies with volume V^n and find the exponent 'n'.

  What is the y-component of force

Object A, which has been charged to + 29.2 nC, is at the origin. Object B, which has been charged to - 28.9 nC, is at ( x,y ) = ( 0.0;{rm cm},; 1.50 cm ).What is the y-component of force (vec{F}_{rm A ; on ; B})_{rm y} on B due to A.

  Star remains spherical during the entire process

a car with a mass 1865 kg is travelling west and slows down uniformly to 8.5 m/s over a distance of 108 m. calculate the initial speed of the car if the required braking force is 7525 N

Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd