PHY 1053 Practice Exam II
Fall 2014
Professor Lrscher
1.) A flatbed truck is carrying an 800kg load of timber that is not tied down. The maximum
friction force between the truck bed and the load is 2400 N. What is the greatest
acceleration that the truck
Homework 8
1.
2

Calculate the energy of each wave.
3 The maximum strength of the magnetic field in an electromagnetic wave is
. What is the maximum
strength of the wave's electric field?
4
b
5 In a traveling electromagnetic wave, the electric fiel
Homework 9
1
2
( = 1.31, = 1.54, = 2.36)
3
4 You can determine the index of refraction of a substance by determining its critical angle.
a What is the index of refraction of a substance that has a critical angle of 68.4 when submerged in
water?
b Wh
Homework 3
1 Suppose that the resistance between the walls of a biological cell is
.
a What is the current when the potential difference between the walls is 75 mV?
b If the current is composed of
?
ions
, how many such ions flow in
2
3
The resistivi
Homework 7
1 A 0.80m aluminum bar is held with its length parallel to the eastwest direction and dropped from a
bridge. Just before the bar hits the river below, its speed is
, and the emf induced across its
length is
. Assuming the horizontal component
Homework 4
1a
b
2 The drawing shows three different resistors in two different circuits. The battery has a voltage of
, and the resistors have values of
,
, and
.
a Calculate the total resistance of the circuit.
b Calculate the total current of the c
Homework 2
1
2 In Figure the point B make an equilateral triangle of side equal to 0.4 m with both charges, point C
make a right isosceles triangle with the two side equal to 0.3 m. Calculate the magnitude of the net
electric field for A, B and C situat
Homework 4
1. How are the two batteries in the figure connected? State whether they are in parallel or in
series and give the polarity of each battery at its connection to the other.
A) in series, positive to positive
B) in series, negative to negative
C)
Homework 5
1a What is the capacitance of a capacitor that stores
of charge on its plates when a
voltage of 1.5 V is applied between them?
b The electric potential energy stored in the capacitor of a defibrillator is 73 J, and the
capacitance is
. What i
Exploration 5
Changing Directions and Modeling
Tori Douthat
Brielle Schiff
Dan Lombardi
Introduction
When throwing a ball up into the air it is always questionable how fast the ball is
going to hit the ground. While the ball is up in the air, making its w