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A platinum sphere with radius 0.0181 m is totally immersed in mercury. Find the weight of the sphere, the buoyant force acting on the sphere, and the sphere's apparent weight. The densities of platinum and mercury are 2.14 × 104 kg/m3 and 1.36 × 104 kg/m3, respectively.
A slingshot consists of a light leather cup attached between two rubber bands. It takes a force of 35 N to stretch the bands 1.5 cm. What is the equivalent spring constant of the rubber bands
Two point charges q and 4q are at x=0 and x=L, respectively, and free to move. A third charge is placed so that the entire three-charge system is in static equilibrium. What is the magnitude of the third charge? What is the x-coordinate of the thi..
One person drops a water balloon from rest 8 m above the ground . Simultaneously a second person throws a water balloon down with an initial downward velocity of 4 m/s.
A 2.50 g lead bullet traveling at 560 m/s strikes a target, converting its kinetic energy into thermal energy. It's initial temperature is 40.0°C. Find the heat required to melt the bullet
A 55-kg hiker starts at an elevation of 1600 m and climbs to the top of a 3100-m peak. What is the hikers change in potential energy
A father clock is controlled by a swinging brass pendulum that is 1.1 meter long at a temperature of 23°C. Determine the change in the length of the pendulum rod
In a science fiction novel, a starship takes three days to travel between two distant space stations according to its own clocks. How fast did the starship travel, relative to the space station
The density of gasoline at 0 degrees celsius is 0.68E3 kg/m^3. What is the density on a hot day when the temperature is 35 degrees celsius
You attach a meter stick to an oak tree, such that the top of the meter stick is 1.27 meters above the ground. If the acorn takes 0.316 seconds to pass the length of the meter stick, how high above the ground was the acorn before it fell
A circuit consists of a 12.0-V battery connected to three resistors (41ohms , 19ohms and 110ohms ) in series. Part A:Find the current that flows through the battery. Answer in mA.
A juggler throws a ball from height of 0.950 m with a vertical velocity of +3.75 m/s and misses it on the way down. What is its velocity when it hits the ground
q1. suppose you discover a type ia supernova in a distant galaxy. at maximum brilliance the supernova reaches an
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