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Sodium atoms in a Bose-Einstein condensate can slow the speed of light's energy propagation to 70 km/hr. Find the index of refraction for this material, and critical angle for total internal refraction if the atoms are otherwise in vacuum.
Two carts with masses of 4.80 kg and 2.78 kg move toward each other on a frictionless track with speeds of 4.94m/s and 3.17m/s respectively. The carts stick together after colliding head-on. Find out the final speed.
As a protest against the umpire's calls, a baseball pitcherthrows a ball straight up into the air at a speed of 200.0 m/s. find the force he exerts on the ball to give it this upward speed
The temperature inside a house is 25°C while the temperature outside is 10°C. Approximately how much energy is radiated per second
Two 10-cm-diameter charged disks face each other, 20 cm apart. The left disk is charged to +55 nC and the right disk is charged to -55 nC. What is the electric field both magnitude and direction, at the midpoint between the two disks
A 2.0 kg rock that is originally at rest loses 407j of potential energy while falling to the ground. Compute the kinetic energy that the rock gains while falling. What is the rock speed now before it strikes the ground?
The magnetic field in the interstellar space of out galaxy is through to be about 10^-10 T in magnitude.how much energy is stored in this field ina cube 10 light-years on edge? (for scale ,note that the nearest star is 4.2 light-years distant and the..
1. A child sits on the edge of a spinning merry-go-round that has a radius of 1.7 m. The child's speed is 5 m/s. What is the child's acceleration?2.During a NASCAR race a car goes 48 m/s around a curved section of track that has a radius of 240 m. Wh..
A vertical wall (7.2 m 2.8 m) in a house faces due east. A uniform electric field has a magnitude of 150 N/C. What is the electric flux through the wall
Gold, which has a mass of 19.32 g for each cubic centimeter of volume, is the most ductile metal, what is the area of the leaf in square meters
As two trains move along a track, their conductors suddenlynotice that they are headed toward each other. The figure givestheir velocities v as a function oftime t as the conductors slow the trains.
The current through a 908 ohm resistor is 189 mA; to the nearest volt, what is the potential difference across the resistor
The concrete encloses one steel reinforcing rod with cross-sectional area 1.00cm2. The rod joins two strong end plates. The cross-sectional area of the concrete perpendicular to the rod is 47.5 cm2. Young's modulus for the concrete is 3.00 x 10^10 N/..
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