You are in a boat filled with large rocks in the middle of a small pond. You begin to drop rocks into the water. What happens to the water level of the pond?


Answer : It falls.

Physics & Space Science

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Compare the four terrestrial world atmospheres

What will be an ideal response?

Physics & Space Science

A container having a volume of 1.0 m3 holds 5.0 moles of helium gas at 50°C. If the helium behaves like an ideal gas, the average kinetic energy per molecule is

a. 6.7 × 10^?20 J. b. 1.0 × 10^?21 J. c. 1.0 × 10^?20 J. d. 6.7 × 10^?21 J. e. 1.3 × 10^?20 J.

Physics & Space Science

A superconducting magnet uses

A) iron cores. B) superconducting coils. C) both of these D) neither of these

Physics & Space Science

Electrons in an x-ray machine are accelerated from rest through a potential difference of 60 000 V. What is the kinetic energy of each of these electrons in eV?

a. 60 eV b. 96 eV c. 38 eV d. 60 keV e. 120 eV

Physics & Space Science