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Two NIST sites have given the wavelengths of red light from a He-Ne laser to be 632.99139822 nanometer in vacuum and 632.81646 nanometer in air. Obtain the index of refraction of the air in this case?
Two 10-cm-diameter charged rings face each other, 24.0 cm apart. Both rings are charged to + 20.0 nC. What is the electric field strength at the midpoint between the two rings and at the center of the left ring?
Some European trucks run on energy stored in a rotating flywheel, with an electric motor getting the flywheel up to its top speed of 110 π rad/s. What is the kinetic energy of the flywheel after charging
A 2.50 kg block hangs from a spring. A 420 g body hung below the block stretches the spring 2.90 cm farther. (a) What is the spring constant? (b) If the 420 g body is removed and the block is set into oscillation, find the period of the motion.
A collision occurs between a 4.44 kg particle traveling with velocity 1 = (6.40 m/s) +(-1.18 m/s) and a 1.49 kg particle traveling with velocity 1 = (-4.64 m/s) + (-4.46 m/s). The collision connects the two particles. What then is the (a) x component..
A freely falling object requires 1.90 s to travel the last 22.0 m before it hits the ground. From what height above the ground did it fall? An attacker at the base of a castle wall 3.97 m high throws a rock straight up with speed 6.00 m/s at a height..
What is the speed of an electron that has a total energy of zero in a hydrogen atom
A rock has a narrow crack (width 1.9 mm) into which water can penetrate. When this water freezes, it expands. Calculate the pressure on the rock when the water freezes
As the sun rises over a still pond, an angle will be reached where its image seen on the water's surface (n(subw)=1.333) will be completely polarized in a plane parallel to the surface. What is the angle between the reflected and refracted beams
A 2.50 ml syringe with an inner diameter of 5.00 mm, a needle innerdiameter of 0.210 mm, What's the minimum force required to press down on the pad
A satellite circles the earth in an orbit whose radius is 1.83 times the earth's radius. What is the period of the satellite
An air molecule is moving at a speed of 455 m/s. How many meters would the molecule move throughout 7ms (milliseconds) if it didn't collide with any other molecules.
A wire made of aluminum is 882 m long and has a cross-sectional area of 36.6 10-7 m2. It is observed that 6.6 C pass through the wire in 79.2 s. Determine the power loss of the wire
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