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An 850g- iron block is heated to 370C and placed in an insulated container (of negligible heat capacity) containing 41.0g of water at 23.0C a).What is the equilibrium temperature of this system? The average specific heat of iron over this temperature range is 560 J/(kg)(K).
14 electrons are placed on a metal sphere. if the potential of the sphere is -38 V, what is the radius?
What is the magnitude of the auto average acceleration.
A 246 kg wooden raft floats on a lake. as a 85 kg man stands on the raft, it sinks 5.0 cm deeper into the water. When he steps off, the raft vibrates for a while.
Far in space, where gravity is negligible, a 485kg rocket traveling at 95.0m/s fires its engines. It shows the thrust force as a function of time. The mass lost by the rocket during these 30 s is negligible.
An aerosol can of whipped cream is pressurized at 440kPa when it's refrigerated at 3 C. The can warns against temperature in excess of 50 C. What is the safest pressure for the can .
The 2.0 kg, 20 cm diameter disk is spinning at 320 rpm. How much friction force must the brake apply to the rim to bring the disk to a halt in 2.0 s.
A cat, also of weight 47.8 {rm N}, falls asleep on top of block A. If block B is now set into downward motion, what is its acceleration magnitude.
An 80 g, 35 cm long rod hangs vertically on a frictionless, horizontal axle passing through its center. A 13 g ball of clay travelling horizontally at 2.50 m/s hits and sticks to the very bottom tip of the rod.
Vector A has a magnitude of 7m and makes an angle of 58o with the positive x axis. Vector B also has a magnitude of 7 m and is directed along negative x axis. Enter your answers in distance then angle (in degrees).
What minimumdistance are they from each other? The angle may be too large to use small angle approximation. suppose in units of m.
Two small metallic spheres, each of mass m = 0.212 g, are suspended as pendulums by light strings of length L as shown in the figure below. The spheres are given the same electric charge of 7.9 nC, and they come to equilibrium when each string is ..
We know that a spherical charged particle of will have an external electric field of E = k q/r2, where k = 8.988×109N·m2·C-2 is the Coulomb constant, q is the charge, and r is the distance from the center of the spherical particle.
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