Acalorimeter contains 100 g of water at 39.8 ºc. a 8.23 g object at 50 ºc is placed inside the calorimeter. when equilibrium has been reached, the new temperature of the water and metal object is 40 ºc. what type of metal is the object made from?

The object in the calorimeter which is burnt is Magnesium.

In the reaction, it is assumed that no energy is lost or gained.

So, water = metal

=

100 4.814 (40 - 39.8) = 8.23 specific heat of metal (40 - 50)

specific heat of metal = -1.1692 J/.

The calculated value is for the specific heat of Magnesium.

Thus the object in the calorimeter which is burnt is Magnesium.

For more information about specific heat, refer to the link:

link

question: ray weighs 100 kilograms, his wrestling partner, bobby, weighs 50 kilograms. if ray moves at 4 m s , how fast will bobby have to run at him to apply an equal amount of kinetic energy?

answer: 8 m/s he needs to run twice as fast to keep up so he has some work to do

explanation:   if the mass has units of kilograms and the velocity of meters per second, the kinetic energy has units of kilograms-meters squared per second squared.

question answered by

(jacemorris04)