Cap
tulo 1
Eletrosttica
a
1.1
Pelas condies de equil
co
brio T = P + FE , ou seja:
T sin
T cos
= FE
= P
Se l o comprimento de cada linha, ento a distncia d entre as duas
e
a
a
q2
1
part
culas dada por d = 2 l sin , de modo que FE = q E = 4 0 d2
e
A part
FORM 0 [1] The work function of copper is 4.7 eV. Electrons are emitted in the photoelectric eect if the wavelength of the incident light is [A] more than the threshold wavelength of 1.14 1015 nm. [B] less than the threshold wavelength of 1.14 1015 nm. [C
FORM 0 [1] An ambulance at rest has a siren that emits a frequency of 400 Hz. The ambulance is moving toward a pedestrian with a speed 34 m/s on a day when the speed of sound in air is 340 m/s.The pedestrian receives a frequency of [A] 360 Hz [B] 400 Hz [
Competition in Physics (Sample Questions)
Multiple Choice Part 1) Given the vectors A=2i+3j, B = i -j (i and j are unit vectors in the x and y directions respectively) and C=A+B, the magnitude of C is (A) 5 (B) 13 (C) 10 (D) none of the above 2) For the s
FORM 0 UM Physics Competition 13 Apr 2002
When you need a numerical value for g , use 10 m/s2 . [1] Which of the following electromagnetic waves is not emitted as a result of changes in the energy level of an electron in an atom? [A] gamma radiation. [B]
[1] A 240-Volt appliance draws 15 A of current for a period of 2 hours. How much energy in kilowatt-hours does it consume? [A] 7.2 [B] 2.6 107 [C] 7200 [D] 3600 [E] 0.8 [2] A 100 kg person stands on a scale in an elevator. What does the scale read when th
The ratio of (1 kilogram/1 milligram) is .1 a) 10^2 b) 10^3 c) 10^6 d) 10^-3 e) 10^-6 The length of each side of a square is 4.0 m. What is the length of the diagonal .2 of the square (shown as a dashed line in the figure)? 4.0 x 4.0 a) 2.8m b) 3.5m c) 5.
AP Physics C: Mechanics 2009 Free-Response Questions
The College Board
The College Board is a not-for-profit membership association whose mission is to connect students to college success and opportunity. Founded in 1900, the association is composed of mo
AP Physics C: Mechanics 2010 Free-Response Questions
The College Board
The College Board is a not-for-profit membership association whose mission is to connect students to college success and opportunity. Founded in 1900, the College Board is composed of
PHYSICS
PHYSICS B
PHYSICS C: MECHANICS
PHYSICS C: ELECTRICITY AND
MAGNETISM
Course Description
M AY 2 010, M AY 2 011
The College Board
The College Board is a not-for-proﬁt membership association whose mission is to connect students
to college success an
SAT Subject Physics Facts & Formulas
This document is a concise but comprehensive guide to the facts and formulas typically used in the material covered by the SAT Subject physics test. The test is designed to determine how well you have mastered the phys
Capacitors & Capacitance
Key contents
Capacitors
Calculating capacitance
Energy stored in a capacitor
Capacitors with dielectric materials
25.2: Capacitance:
To store charge
To store energy
To control variation time
scales in a circuit
25.2: Capacitance: