The nutritional information on a cereal box shows that one serving of a dry cereal has 200kilocalories. If one were to burn one serving of the cereal, the amount of heat given off would besufficient to raise the temperature of 20 kg of water how many degrees Celsius?

The increase in temperature is 10°C

Explanation:

To calculate the change in temperature, we use the equation:

where,

q = heat absorbed = 200 kCal = 200,000 Cal   (Conversion factor: 1 kCal = 1000 Cal)

m = mass of water = 20 kg = 20000 g    (Conversion factor: 1 kg = 1000 g)

c = specific heat capacity of water = 1 Cal/g.°C

= change in temperature = ?

Putting values in above equation, we get:

Hence, the increase in temperature is 10°C

relative dating involves things like higher layers are most recent than rocks lower in the sequence. this can be extended to the known sequence of fossils. rocks containing rabbit fossils are later than those containing dinosaur fossils.  

absolute dating methods mainly use radioactive elements that have known rates of decay and produce recognizable products. for example potassium 40 decays to produce argon. once a rock has solidified the argon is trapped. by measuring the argon and potassium0 you can get an accurate number for the age.  

some other methods are good for archaeological ages. dendrochronology involves recognizing the sequence of tree rings. the orientation of magnetized particles in baked clay can be used to date a fire.

hope this .. .

when you breathe in, or inhale, your diaphragm contracts (tightens) and moves downward. this increases the space in your chest cavity, into which your lungs expand. the intercostal muscles between your ribs also enlarge the chest cavity. they contract to pull your rib cage both upward and outward when you inhale.