Examlex
One of the most efficient engines built so far has the following characteristics:
combustion chamber temperature = 1900°C
exhaust temperature = 430°C
7.0 × 109 cal of fuel produces 1.4 × 1010 J of work in one hour,where 1 cal = 4.19 J
(a)What is the actual efficiency of this engine?
(b)What is the Carnot efficiency of the engine?
(c)What is the power output of this engine?
Public Policy
The principles and guidelines by which governments operate, including laws, regulations, decisions, and actions to address public issues.
Eating Disorders
Mental disorders characterized by abnormal eating habits that negatively affect a person's physical or mental health.
Obesity
A medical condition characterized by excessive body fat accumulation, which poses a risk to health.
Hypothesis
A proposed explanation made on the basis of limited evidence as a starting point for further investigation.
Q2: What length of a certain metal wire
Q4: Suppose that a steel bridge,1000 m long,was
Q8: A mass M is attached to an
Q13: A conducting bar slides without friction on
Q16: In the figure,a C-shaped conductor is in
Q21: Water flows through a pipe having a
Q31: A conducting sphere 45 cm in diameter
Q49: A thin taut string is fixed at
Q63: A 45-mH ideal inductor is connected in
Q83: An ideal monatomic gas cools from 455.0