What if the glass is to appear bright
What is the minimum (non-zero) thickness for the air layer between two flat, and parallel, glass surfaces if the glass is to appear dark when 640 nm light is incident normally? What what if the glass is to appear bright?
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An electron with kinetic energy 1.20 keV circles in a plane perpendicular to a uniform magnetic field. The orbit radius is 25.0 cm. Find the following values.
A uniform disk with a mass of 150 kg and radius of 2 m rotates with an angular speed of 1100 rev/min. A tangential force is applied at a radial distance of 0.65 m. The wheel is brought to rest in 2.5 min. What torque does the force produce?
A spring (k=830 N/m) is hanging from the ceiling of an elevator, and a 5.0-kg object is attached to the lower end. By how much does the spring stretch (relative to its unstrained length) when the elevator is accelerating upward at a = 0.60 m/s2?
A tank of water sits at the edge of a table of height 1.3 m. The tank springs a very small leak at its base, and water sprays out a distance of 0.7 m from the edge of the table. What is the water level h in the tank? (Assume the tank is open to th
For a damped oscillator with a mass of 290 g, a spring constant 80 N/m and a damping coefficient of 57 g/s, what is the ratio of the amplitude of the damped oscillations to the initial amplitude at the end of 26 cycles?
A 20 g rifle bullet traveling 220 m/s buries itself in a 3.5 kg pendulum hanging on a 2.7 m long string, which makes the pendulum swing upward in an arc. Determine the vertical and horizontal components of the pendulum's displacement.
What are the Levellers criticizing when they propose that "in all laws made or to be made every person may be bound alike"?
a. If the seed pod is 1.2 m above the ground, how long does it take for the seed to land? (Neglect air resistance.) b. What horizontal distance does it cover during its flight?
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