3.0 kg of nitrogen gas in a piston cylinder device initially at a temperature of 300 k and a pressure of 100 kpa is compressed to a volume equal to 90% of the initial volume and at a pressure of 140 kpa. determine the change in specific internal energy of the nitrogen during the process, assuming that the nitrogen acts as an ideal gas with constant specific heats.

The correct answer is  "c".  it is "c" because melting is an endothermic change, and endothermic get's energy from surroundings. 

Well it depends on the object or substance

Lysosomes are considered  a digestive enzyme

Question 1 answer: make sure you eat healthy foods and excercise atleast once a day.question 2 answer: sometimes bullying . bullying lowers a persons self-esteem sometimes which can make them not care for themselves to much making them feel bad about there body structer. that or they just have a bad body structer and there family/doctor said its unhealthy how they eat.