A steam engine is operating at its theoretical maximum efficiency of 60%. If the waste heat has a temperature of 100°F (38°C), what is the temperature of the boiler?

a. 350°C
b. 94°C
c. 225°C
d. 504°C
e. 775°C


d

Physics & Space Science

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When two elements form a eutectic phase diagram, in the eutectic reaction the atoms of the solid elements _____________.

Fill in the blank(s) with the appropriate word(s).

Physics & Space Science

The observable ________ is a thin layer of the Sun in which the solar material becomes suddenly much more opaque as we look deeper into the Sun

Fill in the blank(s) with correct word

Physics & Space Science

Why does ion propulsion, which expels material much faster than ordinary chemical rockets, hold such promise for future space travel?

What will be an ideal response?

Physics & Space Science

The electric field at a point 2.8 cm from a small object points toward the object with a strength of 180,000 N/C. What is the object's charge q? (k = 1/4??0 = 8.99 × 109 N ? m2/C2 )

A) -16 nC B) +16 nC C) -17 nC D) +17 nC

Physics & Space Science