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1. A semiconductor has a bandgap of 1.5 eV. What is the bandgap in Joules?
2. A semiconductor has a bandgap of 5 X 10-19J. What is the bandgap in eV?
A long stick has a mass of 0.5 kilogram and a radius of gyration of 4.1 meter. Find which is harder to swing in a circle, the long stick or the barbell
A pair of narrow, parallel slits separated by 0.240 mm are illuminated with the green component from a mercury vapor lamp (λ = 546.1 nm). The interference pattern is observed on a screen 1.27 m from the plane of the parallel slits.
A 51.1 kg bungee jumper jumps off a bridge and undergoes simple harmonic motion. what is the spring constant of the bungee cord
An initially stationary 2.7 kg object accelerates horizontally and uniformly to a speed of 16 m/s in 3.1 s. What is the instantaneous power due to that force at the end of the interval
Apollo 11 astronauts left an array of "corner mirrors" on the Moon, each one consisting of three mirrors arranged at mutual right angles like the corner of a box. How far away was the array of mirrors at that time?
in a long solenoid the density of the wire is 180 turnscm. if the current in the wire is 0.680a what is the strength of
a 10-turn square coil 0.50 m on a side lies in the xy-plane. a uniform magnetic field with magnitude 1.0 t in the
A long cylindrical copper wire of radius 0.20 cm is surrounded by a cylindrical sheath of rubber of inner radius 0.20 cm and outer radius 0.30 cm. What will be the electric field just outside the rubber sheath
the normal human eye has maximum visual acuity with a pupil size of about 3 mm. for larger pupils acuity decreases due
Two railroad cars, each of mass 7300 kg and traveling at 73 km/h, collide head on and come to rest. How much mechanical energy is lost in this collision
A square, 0.80 m on a side, is mounted so that it can rotate about an axis that passes through the center of the square. The axis is perpendicular to the plane of the square. A force of 15.6 N lies in this plane and is applied to the square. What ..
An object has an initial velocity of 10 m/s angle of 70* and a constant acceleration of 2.5 m/s at 20 as it passes through the point x=0,y=0. Find the magnitude and direction of the velocity at that time
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