Log in
Physics
1
answer
0
watching
4
views
28 Nov 2019

An aluminum bolt has a mass of 114 g, and its temperature is 30.0 oC. The bolt is dropped into a large tank of liquid nitrogen, whose temperature is -195.8 oC. Assuming no heat exchange with the surrounding, how much nitrogen boils away as the bolt reaches thermal equilibrium with the liquid nitrogen?

Watch
1
answer
0
watching
4
views

For unlimited access to Homework Help, a Homework+ subscription is required.

Unlock all answers

Get 1 free homework help answer.
Get unlimited access
Already have an account? Log in
Share

Related textbook solutions

Physics: Principles with Applications
7th Edition, 2013
Giancoli
ISBN: 9780321625922

Related questions

1 ) In a physics lab, a student accidentally drops a 27.0-g brasswasher into an open Dewar of liquid nitrogen at 77.2 K. How muchliquid nitrogen boils away as the washer cools from 297 K to 77.2K? The latent heat of vaporization for nitrogen is 199.1kJ/kg.

2 ) What mass of water at 28.0° C added to a Styrofoam cupcontaining two 60.0-g ice cubes from a freezer at -20.0° C willresult in a final temperature of 5.0° C for the drink?

3 ) Ice at 0.0° C is mixed with 4.00 102 mL of water at 21.0° C.How much ice must melt to lower the water temperature to 0.0° C?

The spirit-in-glass thermometer, invented in Florence, Italy, around 1654 consists of a tube of liquid (the spirit) containing a number of submerged glass spheres with slightly different masses (Fig. Pl4.73). At sufficiently low temperatures all the spheres float, but as the temperature rises, the spheres sink one after another. The device is a crude but interesting tool for measuring temperature. Suppose that the tube is filled with ethyl alcohol, whose density is at 20.0°C and decreases to at 30.0°C.

(a) Assuming that one of the spheres has a radius of 1.000 cm and is in equilibrium halfway up the tube at 20.0°C, determine its mass.

(b) When the temperature increases to 30.0°C, what mass must be a second sphere of the same radius have to be in equilibrium at the halfway point?

(c) At 30.0°C, the first sphere has fallen to the bottom of the tube. What upward force for the bottom of the tube exerts on this sphere?

A 20.0 g copper ring at 0.000°C has an inner diameter of D =2.54000 cm. An aluminum sphere at 93.0°C has a diameter of d =2.54508 cm. The sphere is placed on top of the ring, and the twoare allowed to come to thermal equilibrium, with no heat lost tothe surroundings. The sphere just passes through the ring at theequilibrium temperature, and the coefficients of linear expansionof aluminum and copper are αAl = 23 10-6/C° and αCu = 17 10-6/C°,respectively. . What is the mass of the sphere?
1 kg


MY ANS WAS : 0.001302821 kgand was wrong

NOTE:

Did you use the equation for linear expansion for the ball and alsofor the ring so that the ball ends up with a radius equaling theinner radius of the ring? You then know the final temperature andthus also the temperature for each object. How much energy isgained by the ring? How much is lost by the ball? Can you then usethe expression relating energy loss to mass, specific heat, andtemperature change?

Weekly leaderboard

Home
Homework Help 3,900,000
Physics 110,000
Start filling in the gaps now
Log in