The minimum amount of steam at 100°C needed to melt 1 gram of 0°C ice is

A) 0.125 gram.
B) 0.148 gram.
C) 6.75 grams.
D) 8 grams.
E) none of the above


Answer: A

Physics & Space Science

You might also like to view...

Which of the following are candidates for dark matter?

A) brown dwarfs B) Jupiter-size objects C) WIMPs D) faint red stars E) all of the above

Physics & Space Science

What is the de Broglie wavelength of a ball of mass 200. g moving with a speed of 30. m/s?

A) 1.1 × 10-34 m B) 4.5 × 10-28 m C) 6.67 × 10-28 m D) 2.2 × 10-34 m E) 6.67 × 10-31 m

Physics & Space Science

When the forward and reverse reactions are proceeding at the same rate, the reaction is said to have reached ______________

Fill in the blank(s) with correct word

Physics & Space Science

In an experiment different wavelengths of light, all able to eject photoelectrons, shine on a freshly prepared (oxide-free) zinc surface. Which statement is true?

a. The number of photoelectrons emitted per second is independent of the intensity of the light for all the different wavelengths. b. The number of photoelectrons emitted per second is directly proportional to the frequency for all the different wavelengths. c. The maximum kinetic energy of the photoelectrons emitted is directly proportional to the frequency for each wavelength present. d. The maximum kinetic energy of the photoelectrons has a linear relationship with the frequency for each wavelength present. e. The maximum kinetic energy of the photoelectrons is proportional to the intensity of the light and independent of the frequency.

Physics & Space Science