Exam2-sample

# Exam2-sample - Problems 1-2 A water molecule contains one...

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Problems 1-2 A water molecule contains one oxygen (O) and two hydrogen (H) atoms. There is a positive charge of +0.335e on each H and negative charge of -0.670e on the O atom. Problem 1 : Which statement is correct? A. The force on the O atom by H atoms is larger than the force on H atoms by the O atom B. The force on H atoms by the O atom is larger than the force on the O atom by H atoms C. The forces are equal in magnitude D. The forces are equal E. not enough information is given Problem 2: Calculate the electrostatic potential energy stored in the H 2 O molecule. A) -9.3 10 -19 J B) 9.3 10 19 J C) 7.2 10 19 N D) -7.2 10 -19 N E) zero Problem 3. During alpha decay Uranium 238 decays into Thorium-234 and an alpha particle (Helium-4). Which of the following statements is correct: A) momentum and total energy are conserved during the decay B) total energy, momentum and mass are conserved during the decay C) kinetic energy and momentum are conserved during the decay D) potential energy is conserved during the decay E) kinetic energy is conserved during the decay

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Problem 4. In a cathode ray tube (CRT) used in oscilloscopes and television sets, a beam of electrons is steered to different places by electrostatic produced by a plane capacitor. Assume that a force F is applied only while electrons are between the plates and that initial speed v 0 <<c. Neglecting gravitational force, calculate the height y
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## This note was uploaded on 04/23/2011 for the course PHYS 172 taught by Professor ? during the Spring '08 term at Purdue University-West Lafayette.

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Exam2-sample - Problems 1-2 A water molecule contains one...

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