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30-34
Solutions to Physics: Principles with Applications, 5/E, Giancoli
Chapter 7
CHAPTER 7
0.18 kg m/s.
1.
p = mv = (0.022 kg)(8.1 m/s) =
2.
During the throwing we use momentum conservation for the one-dimensional motion:
0 = (mboat + mchild)vboat + mpackagevp
ANSWERS - AP Physics Multiple Choice Practice Circuits
Solution
Answer
3.
Adding resistors in parallel decreases the total circuit resistance, this increasing the total current
in the circuit.
A
4.
R = L/A. Greatest resistance is the longest, narrowest re
ELECTRIC CIRCUITS
Conventional current is the flow of positive charges though a closed circuit. The current
through a resistance and the voltage which produces it are related by Ohms law. Power
is the rate at which energy is consumed in a circuit through
ELECTRIC FORCES AND ELECTRIC FIELDS
Electric charge is the fundamental quantity that underlies all electrical phenomena. There
are two types of charges, positive and negative, and like charges repel each other, and
unlike charges attract each other. A con
ANSWERS - AP Physics Multiple Choice Practice Fluids
Solution
Answer
B
13.
Same as question #5, but moving to more area less speed more pressure
14.
Flow continuity.
17.
P=F/A
1x105 = F / (22*5)
18.
P=F/A
= ma / A
19.
Three forces act on the block, Ft dow
ANSWERS - AP Physics Multiple Choice Practice Gravitation
Solution
Answer
4.
so the acceleration due to gravity (and the weight of an object) is proportional to the mass of the
planet and inversely proportional to the distance from the center of the plane
THE REFLECTION OF LIGHT: MIRRORS
PREVIEW
The ray model of light states that light may be represented by a straight line along the
direction of motion, and ray optics is the study of light using the ray model. Light can be
reflected from a surface such as
AP Physics Multiple Choice Practice Magnetism and Electromagnetism ANSWERS
SECTION A Magnetostatics
Solution
Answer
For the purposes of this solution guide. The following hand rules will be referred to.
RHR means right hand rule (for + current). LHR will
AP Physics Multiple Choice Practice Modern Physics ANSWERS
SECTION A Quantum Physics and Atom Models
Solution
Answer
B
1.
Standard photoelectric effect question. If the frequency does not cause emission, it is below the
threshold and will not be able to c
ANSWERS - AP Physics Multiple Choice Practice Momentum and Impulse
Answer
Solution
2.
Two step problem.
I) find velocity after collision with arrow.
mavai = (ma+mb) vf vf = mv / (m+M)
E
II) now use energy conservation. Ki = Usp(f)
(m+M)vf2 = k x2, sub in
Momentum and Impulse
IMPULSE AND MOMENTUM
PREVIEW
The momentum of an object is the product of its mass and velocity. If you want to change
the momentum of an object, you must apply an impulse, which is the product of force and
the time during which the fo
ANSWERS - AP Physics Multiple Choice Practice Electrostatics
Solution
Answer
1.
By definition
B
3.
When the battery is disconnected, Q remains constant. Since C decreases when d increases and
Q = CV, V will increase
E
4.
E = kQ/r2
D
5.
V = kQ/r
C
6.
W = q
ROTATIONAL DYNAMICS
PREVIEW
A force acting at a perpendicular distance from a rotation point, such as pushing a
doorknob and causing the door to rotate on its hinges, produces a torque. If the sum of
the torques acting on an object is zero, we say that th
SIMPLE HARMONIC MOTION
PREVIEW
An object such as a pendulum or a mass on a spring is oscillating or vibrating if it is
moving in a repeated path at regular time intervals. We call this type of motion harmonic
motion. For an object to continue oscillating
TEMPERATURE, HEAT AND GASES PART 1
PREVIEW
The total internal energy of the molecules of a substance is called thermal energy. The
temperature of a substance is a measure of the average kinetic energy of the molecules in
the substance, and gives an indica
ANSWERS - AP Physics Multiple Choice Practice Thermodynamics
Solution
6.
James Joule did experiments on changing the temperature of water through various means,
including by doing work on it.
10.
Answer
C
B
14.
For the entire cycle, U = 0 and W = 8 J so Q