Author Question: A 400-g block of iron at 400C is dropped into a calorimeter (of negligible heat capacity) containing ... (Read 241 times)

Marty · **on:** Jul 29, 2018

A 400-g block of iron at 400C is dropped into a calorimeter (of negligible heat capacity) containing 60 g of water at 30C.

How much steam is produced? The latent heat of vaporization of water is 22.6 105 J/kg and its specific heat capacity is 4186 J/kg K. The average specific heat of iron over this temperature range is 560 J/kg K.
A) 22 g
B) 33 g
C) 42 g
D) 54 g
E) 59 g

Question 2

When you double the number of windings in an ideal solenoid while keeping all other parameters (radius, length and current) fixed, the magnetic field at the center of the solenoid will

A) quadruple.
B) double.
C) triple.
D) be reduced by a factor of one-fourth.
E) be reduced by a factor of one-half.