A 40.0-g block of ice at -15.00°C is dropped into a calorimeter (of negligible heat capacity) containing water at 15.00°C. When equilibrium is reached, the final temperature is 8.00°C

How much water did the calorimeter contain initially? The specific heat of ice is 2090 J/kg ? K, that of water is 4186 J/kg ? K, and the latent heat of fusion of water is 33.5 × 104 J/kg. A) 302 g
B) 345 g
C) 405 g
D) 546 g
E) 634 g


D

Physics & Space Science

You might also like to view...

A Trombe wall is a masonry wall often used in passive solar homes to store solar energy. Suppose that such a wall, fabricated from 20-cm-thick solid concrete blocks (k = 0.13 W/(mK), ? = 0.05 × 10–5 m2/s) is initially at 15°C in equilibrium with the room in which it is located. It is suddenly exposed to sunlight and absorbs 500 W/m2 on the exposed face. The exposed face loses heat by radiation and convection to the outside ambient temperature of –15°C through a combined heat transfer coefficient of 10 W/(m2 K). The other face of the wall is exposed to the room air through a heat transfer coefficient of 10 W/(m2 K). Assuming that the room air temperature does not change, determine the maximum temperature in the wall after 4 hours of exposure and the net heat transferred to the room.

GIVEN • Trombe wall suddenly exposed to sunlight FIND (a) Maximum temperature in the wall after 4 hours (b) Heat input to the room

Physics & Space Science

What is the Physics Primer?

A. A set of mathematics topics that are relevant to introductory physics courses. B. A list of the most important formulas used in introductory physics courses. C. A detailed explanation of all of the mathematics you will use in your introductory physics course. D.A tutorial of the most important physics concepts covered in introductory physics courses

Physics & Space Science

Identical point charges (+20 ?C) are placed at the corners of an equilateral triangle with sides of 2.0-m length. How much external energy is required to bring a charge of 45 ?C from infinity to the midpoint of one side of the triangle?

a. 26 J b. 16 J c. 23 J d. 21 J e. 12 J

Physics & Space Science

If the density of the universe is less than the critical density, then the total energy of the universe is

A) zero. B) negative. C) positive.

Physics & Space Science