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In the illustration above, two glass plates have a very slight angle between them because a speck of dust props up one edge of the top plate. When illuminated from above with light of wavelength 546 nm, eleven dark interference fringes are observed (counting from zero at the left edge).
a. Find the height of the dust speck.
b. Find the angle (in degrees) between the plates if their diameters are 2.00 cm.
A 69-kg sky diver jumped out of an airplane at an altitude of 0.70 km. How much energy was dissipated by air resistance during the jump
A DC motor connected to a 120 V power supply develops a back emf of 70 V when running at full speed. If the armature coils have a total resistance of 2.5μ, calculate the power (P = I2R) lost as heat in the coils.
A series LR circuit contains an emf source of having no internal resistance, a resistor, a inductor having no appreciable resistance, and a switch. what is the resistance of the resistor
A 1590 kg car starts from rest on a horizontal road and gains a speed of 61 km/h in 30 s (a) what is its kinetic energy at the end of the 30 s.
A hollow aluminum sphere with outer diameter 10.9cm has a mass of 826g. What is the sphere's inner diameter
The E-field between the parallel capacitor plates is 4.1·105 N/C. What B-field is required so that the protons are not deflected? (Ignore relativistic effects for highvelocities.)
When the Sun evolves to the red giant stage its radius may increase to as high as 100 solar radii. Using the expression density = Mass/volume, and assuming the mass doesn’t change, by what factor does the Sun’s density change when it expands to the r..
A Wm = 890-N man sits on top of a stepladder of negligible mass that rests on a frictionless floor as shown in the figure below. Calculate the tension in the cross brace
An experimental bicycle wheeel isplaced on a test stand so that it is free to turn on itsaxle. If a constand net torque of 5.00Nm is applied to thetire for 2.00s, calculate the friction torque
A charge Q1 = 1.10 x 10-9 C is a distance r = 4.00 cm away from a charge Q2 = -8.25 x 10-9 C. Calculate the magnitude of the force on Q1 due to Q2
A charge of 5q is fixed on a plane at the origin(0,0) of an xy-coordinate system, and a charge9q is fixed at (5 cm,-5 cm). Where must a charge of-3q be placed at rest for it to be in equilibrium (that is, so that it remains at rest)?
Unpolarized light with an intensity of585W / m2 is incident on a polarizer with an unknown axis. The light then passes through a second polarizer with has an axis which makes an angle of67.0° with the vertical.
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