A radio broadcast antenna is 36.00 km from your house Suppose an airplane is flying 2.230 km above me line connecting the broadcast antenna and your radio and that waves reflected from the airplane travel 88.00 wavelengths farther than waves that travel directly from the antenna to your house, (a) Do you observe constructive or destructive interference between the direct and reflected waves? ( Hint Does a phase change occur when the waves are reflected?) (b) The situation just described occurs when the plane is above a point on the ground that is two thirds of the way from the antenna to your house. What is the wavelength of the radio waves?
A radio broadcast antenna is 36.00 km from your house Suppose an airplane is flying 2.230 km above me line connecting the broadcast antenna and your radio and that waves reflected from the airplane travel 88.00 wavelengths farther than waves that travel directly from the antenna to your house, (a) Do you observe constructive or destructive interference between the direct and reflected waves? ( Hint Does a phase change occur when the waves are reflected?) (b) The situation just described occurs when the plane is above a point on the ground that is two thirds of the way from the antenna to your house. What is the wavelength of the radio waves?
A radio broadcast antenna is 36.00 km from your house Suppose an airplane is flying 2.230 km above me line connecting the broadcast antenna and your radio and that waves reflected from the airplane travel 88.00 wavelengths farther than waves that travel directly from the antenna to your house, (a) Do you observe constructive or destructive interference between the direct and reflected waves? (Hint Does a phase change occur when the waves are reflected?) (b) The situation just described occurs when the plane is above a point on the ground that is two thirds of the way from the antenna to your house. What is the wavelength of the radio waves?
"looks" like a particle.)
...32 GO
In Fig. 22-55, positive
charge q = 7.81 pC is spread uni-
formly along a thin nonconducting
rod of length L = 14.5 cm. What are
the (a) magnitude and (b) direction
(relative to the positive direction
of the x axis) of the electric field
produced at point P, at distance
R = 6.00 cm from the rod along its
perpendicular bisector?
R
y
Р
+ + + + + + + + +-×
L
Figure 22-55 Problem 32.
1) A horizontal wire carrying current I in +x direction on the x-axis from x=0 to x=2
2) A vertical wire carrying current I upward at along the x=2 line from y=0 to y=8
3) A diagonal straight wire started at the origin and it ends at y=8 x=2 carrying a current in SE direction ( diagonally downward); y=4x
In a regional magnetic field that is given in vector notation by
B = ( y i - x j )/(x^2+y^2+25)
As components
Bx = (y+1)/x^2+y^2+25)
By = (1- x )/(x^2+y^2+25)
Find the integral expression for the net force for each branch carrying 5 ampere current.
An electric power station that operates at 30 KV and uses
a 15:1 set step-up ideal transformer is producing 400MW
(Mega-Watt) of power that is to be sent to a big city
with only 2.0% loss. What
which is located 270 km
away
is the resistance of the Two wires that are
being used?
52
Chapter 28 Solutions
Modified Mastering Physics with Pearson eText -- Access Card -- for Physics (18-Weeks)
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