Homework Statement
Single-slit diffraction can be observed with any type of electromagnetic wave (not just light). Suppose you want to make a diffraction slit whose width is seven times larger than the wavelength for the following cases. How wide would the slit be?
(a) A radio wave for...
Homework Statement
What is the equivalent capacitance of the four capacitors in the figure below? Take C1 = 2.6 µF, C2 = 4.1 µF, C3 = 3.9 µF, and C4 = 1.1 µF.
Homework Equations
Cequiv of capacitor in series = (1/C1)+(1/C2)+(1/C3)+(1/C4)
Then take the reciprocal of the answer.
The...
Homework Statement
Two particles with electric charges Q and −3Q are separated by a distance of 2.5 m.
If Q = 4.9 C, what is the electric force between the two particles?
Homework Equations
Coloumb's equation: F=k*q1*q2/r^2
k=9.0*10^9
The Attempt at a Solution
I just tried to...
Homework Statement
An aluminum beam 79 m long and with a cross-sectional area of 0.095 m2 is used as part of a bridge. The beam is clamped rigidly at both ends.
(a) If the temperature of the beam is increased by 29°C, what is magnitude of the extra force exerted by the beam on one of its...
Homework Statement
An ice cube of volume 12.1 cm3 is initially at a temperature of -18.1°C. How much heat is required to convert this ice cube into steam?
(the final answer must be in Joules)
Homework Equations
Q = m*c*deltaT
Q = m*Lf (latent heat of fusion)
Q = m*Lv (latent heat of...
Homework Statement
The distance between a node and the nearest antinode of a standing sound wave in air is 7.55 m. What is the frequency of this wave? (Use 343 m/s as the speed of sound in air.)
Homework Equations
velocity = wavelength * frequency
The Attempt at a Solution
I...
Homework Statement
An airplane has a velocity relative to the air of 189 m/s in a westerly direction. If the wind has a speed relative to the ground of 50 m/s directed to the north, what is the speed of the plane relative to the ground?
Homework Equations
I'm not entirely sure..
The...