1.
A riverside warehouse has two open doors, as in the figure below. Its
interior is lined with a sound-absorbing material. To person A, the
sound is loud and clear. To person B, the sound is barely a
1.
The work function for platinum is 6.35 eV. 27.11
a.
Convert the value of the work function from electron volts to joules.
1eV = 1.6*10^-19
Workfunction = 6.35 eV = (6.35)1.6 * 10-19 )
ANS = 1.016*
1.
Three point charges are located at the corners of an equilateral triangle as in the figure below. Find the
magnitude and direction of the net electric force on the 1.30 C charge. (A = 1.30 C, B = 6
1. The three charges in the figure below are at the vertices of an isosceles triangle.
Let q = 7.00 nC and calculate the electric potential at the midpoint of the base.
A=orange ball
B=lower left C=lo
1. An iron wire has a cross-sectional area of 7.10 10-6 m2. Carry out steps (a)
through (e) to compute the drift speed of the conduction electrons in the wire.
(a) How many kilograms are there in 1 mo
15. The half-life of an isotope of phosphorus is 14 days. If a sample
contains 3.0 1016 such nuclei, determine its activity. Express your
answer in curies.
ln 2
The decay constant is l = T1 2 , so the
1. Suppose the ionization energy of an atom is 4.100 eV. In this same atom, we
observe emission lines of wavelengths 310.0 nm, 400.0 nm, and 1378 nm.
Construct the energy level diagram with the least
1. The light beam shown in the figure below makes an angle of = 19.0 with
the normal line NN' in the linseed oil. Determine the angles and '. (The
refractive index for linseed oil is 1.48.)
At
(sin()
1. Consider the circuit shown in the figure below. Use the following
as necessary: R1 = 12.00 , R2 = 2.20 , and V = 12.00 V.
(a)
Calculate the equivalent resistance of the R1 and
5.00 resistors connec
1. A long, straight wire lies in the plane of a circular coil with a radius of 0.050 m. The
wire carries a current of 5.0 A and is placed along a diameter of the coil.
(a) What is the net flux through
1. What must be the capacitance of a capacitor inserted in a 55 Hz circuit in series with
a generator of 200 V maximum output voltage to produce an rms current output of
0.75 A?
Use Xc=1/2fV
;
C=[(sqr
1.
A laboratory electromagnet produces a magnetic field of
magnitude 2.10 T. A proton moves through this field with a
speed of 7.00 106m/s.
(a)
Find the magnitude of the maximum magnetic force that
co