Additional Exercise 4.32 A 500.0-g piece of iron is heated in a flame and dropped into 400.0 g of water at 10.0 °C. The temperature of the water rises to 90.0 °C. How hot was the iron when it was first removed from the flame?

c- cold periods in earth's history during which glaciers covered much of the surface.

explanation:

the density of gold = 19.3 g/cm3

the relation between density and mass and volume is

density = mass / volume

given :

mass of gold = 13 g

density = 13g / volume = 19.3

volume = 13 /19.3 = 0.67 cm^3

thus volume of gold nugget = 0.67 cm^3

c

explanation:

weight of any object is given by

w = m*g

where m is mass of the object and g is the acceleration due to gravity.

for earth the value of g is 9.8 m/s^2 so

w=117.6 n m=12 g=?

117.6=12g => g=9.8 m/s^2

which is the force of gravity on earth.