When using powers-of-ten notation:
a. positive and negative exponents both indicate large numbers.
b. positive and negative exponents both indicate small numbers.
c. positive exponents indicate large numbers and negative exponents indicate small numbers.
d. positive exponents indicate small numbers and negative exponents indicate large numbers.
e. negative exponents indicate large numbers.
c
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Carnot Engine: One of the most efficient engines built so far has the following characteristics: The combustion chamber temperature is 1900°C, the exhaust temperature = 430°C, 7.0 × 109 cal of fuel produces 1.4 × 1010 J of work in one hour. (1 cal = 4.186 J)(a) What is the actual efficiency of this engine?(b) What is the power output of this engine?(c) What would be the maximum possible efficiency for an engine using the same temperature extremes?
What will be an ideal response?
Algebraic symbols in physics equations represent physical quantities, therefore
A. the symbols represent numbers only. B. the symbols represent numbers and units. C. the symbols consist of units only. D. the symbols are only abstract. E. the symbols are only imaginary.
A ball gains speed while rolling down a hill due mainly to
A) its rotational inertia. B) its angular acceleration. C) a balanced torque. D) an unbalanced torque.
The three phases of matter can exist together in equilibrium at the
A) critical point. B) triple point. C) melting point. D) boiling point. E) evaporation point.