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The speed of light in a certain substance is 89% of its valuein water. What is the index of refraction of this substance?
A 0.340 kg block is attached to ahorizontal, ideal spring with spring constant k = 30.0 N/m. There is no friction. At t = 0, the block has a velocity of - 5.00 m/s and adisplacement of 0.280 m.
A 1800 kg truck traveling north at 33 km/h turns east and accelerates to 50 km/h. What is the change in the truck's kinetic energy
Imagine that the temperature of a 225 g block of aluminum sitting in the sun increases from 275 K to 300 K
A moving particle encounters an external electric field that decreases its kinetic energy from 8650 eV to 6910 eV as the particle moves from position A to position B. The electric potential at A is -56.5 V, and the electric potential at B is +28.1..
Three springs each hang from a ceiling with a stationary block attached to the lower end. The blocks (with m1> m2 > m3) stretch the springs by equal distances. Each block-spring system is then set into vertical SHM. Rank the masses according to the p..
question1if argentinosaurus a long-necked gigantic sauropod had a head height of 19 m and a heart height of 7.9 m what
Two ants race across a table 62 cm long. One travels at 4.77 cm/s and the other at 2 cm/s. When the first one crosses the finish line, how far behind is second one. What am I trying to solve for distance, speed, or time.
A 35.0-kg child swings in a swing supported by two chains, each 2.94 m long. The tension in each chain at the lowest point is 418 N. Find the child's speed at the lowest point
a rigid structure consisting of a circular hoop of radius R and mass m, and a square made of four thin bars, each of length R and mass m. What is its angular momentum about that axis
An athlete swims the length L of a pool in a time t1 and makes the return trip to the starting poisition in a time t2. (a) If she is swimming initially in the positive x-direction, determine her average velocities symbolically in (a) the first hal..
An engine with reservoir temperatures of 387 K and 725 K operates at half the efficiency of a Carnot engine. If the hot reservoir supplies the engine 4670 J of heat energy during each cycle, how much net work does the engine do in a cycle?
A 12.6 g CD with a radius of 6.16 cm rotates with an angular speed of 31.3 rad/s. What is its kinetic energy, What angular speed must the CD have
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