The concept of pressure involves both

A) force and volume.
B) force and area.
C) area and volume.


Answer: B

Physics & Space Science

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Projectile Motion: A girl throws a rock horizontally with a speed of 12 m/s from a bridge. It falls 2.28 s before hitting the water below. Neglect air resistance.(a) How high is the bridge from the water below?(b) How far horizontally does the rock travel before striking the water?

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

Physics & Space Science

You observe a low-mass helium white dwarf. What can you conclude?

A) It is over 100 billion years old. B) It will soon be a planetary nebula. C) It is part of a binary star system. D) Its core is mostly carbon. E) It was once a blue supergiant.

Physics & Space Science

The plates of a parallel-plate capacitor are maintained with constant voltage by a battery as they are pulled apart. What happens to the strength of the electric field during this process?

A) It decreases. B) It increases. C) It remains constant. D) There is no way to tell from the information given.

Physics & Space Science

According to the Bohr model, an electron in an excited state of hydrogen can emit

A) at most a single photon until the atom re-excites. B) several photons in a series of transitions to a lower state. C) a continuous stream of light. D) none of the above

Physics & Space Science