Multiple Choice
An inventor develops a stationary cycling device by which an individual,while pedaling,can convert all of the energy expended into heat for warming water.How much mechanical energy is required to increase the temperature of 200 g of water (enough for 1 cup of coffee) from 18°C to 94°C? (1 cal = 4.186 J,the specific heat of water is 4 186 J/kg⋅°C)
A) 6.4E+4 J
B) 3.2E+4 J
C) 1.6E+4 J
D) 1.0E+3 J
E) 1.5E+1 J
Correct Answer:

Verified
Correct Answer:
Verified
Q1: A person has a thermal conductivity of
Q2: The filament temperature of a light bulb
Q3: A swimming pool heater has to be
Q5: Which of the following has the highest
Q6: How many calories are equal to four
Q7: Dmitri places one end of a copper
Q8: A 4.00-g lead bullet is traveling at
Q9: A 3.00-kg copper rod is 45.0 cm
Q10: Iced tea is made by adding ice
Q11: A 10.0-kg piece of aluminum (which has