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300 g of water at 45°C are poured into an 800-g aluminum container with an initial temperature of 10°C. The specific heat of aluminum is 900 J/(kg·K). What is the final temperature of the system, assuming no heat is exchanged with the surroundings? The specific heat of water is 4186 J/(kg·K).
Draw a cube and Cartesian axes. All points of the cube lie in the (+,+,+) octant of the coordiante system. Determine the angle (in degrees) between the vectors OA and OC
Besides the traditional colorimetric acid/base indicators, there is another class that doesn't use color, the olfactory acid-base indicators! These compounds smell or don't smell based on their pH and a lot of them are plant-derived compounds
Tension is maintained in a string. The observed wave speed is 25 m/s when the suspended mass is 3.0 kg. (a) What is the mass per unit length of the string? (b) What is the wave speed when the suspended mass is 1.7 kg?
A hunter who is a bit of a braggart claims that from a distance of 1.7 km he can selectively shoot either of two squirrels who are sitting 8.0 centimeters apart on the same branch of a tree. Determine the diameter of the pupils of his eyes
What must be the area of a suction cup that is completely evacuated and a ceiling if the cup is to support a child who weighs 30 kg
The engine of a model rocket accelerates the rocket vertically upward for 2.0 s as follows: At t = 0, the rocket's speed is zero; at t = 1.0 s, determine the instantaneous acceleration of the rocket at t = 1.5 s
a skater spins with an angular speed of 12 rad/s with her arms outstretched. determine the percentage change in her kinetic energy
A special electronic sensor is embedded in the seat of a car that takes riders around a circular loop-the-loop ride at an amusement park. What is the speed of the rider at the top of the loop
A basketball player jumps straigh up to launch a long jump shot at an angle of 45 degrees with the horizontal and a speed of 15 m/s. How far from his original position does he land
Smoke particles in the air typically have masses of the order of 10^-16 kg. Find the root-mean-square speed of Brownian motion for a particle with a mass of 3.00 x 10^-16kg in air at 300K
find the radius of curvature of the vertical profile of the road at A. Using value of the curvature found, determine the force exerted on a 160-lb driver by the seat of his 3100-lb car as the car, traveling at a constant speed of 50 mi/h, passes t..
On October 9, 1992, a 27-pound meteorite struck a car in Peekskill, NY, leaving a dent 22 deep in the trunk. what was the magnitude of its deceleration
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