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A thermos contains 130 cm3 of coffee at 85° C. To cool the coffee, you drop two 13-g ice cubes into the thermos. The ice cubes are initially at 0° C and melt completely. What is the final temperature of the coffee? Treat the coffee as if it were water. (See Table 12.2 and Table 12.3 for appropriate constants.)
It is proposed that future space stations create an artificial gravity by rotating, What rotation period will provide "normal" gravity
One particle has a mass of 4.41 x 10-3 kg and a charge of +6.92 ?C. A second particle has a mass of 6.52 x 10-3 kg and the same charge. The two particles are initially held in place and then released.
A 12- V battery causes a current of 0.40A through a resistor. A) what is its resistance B) how may joules of energy does the battery lose in minutes.
A block of mass m = 2.00 kg is dropped from height h = 90 cm onto the spring of spring constant k = 1960 N/m. Find out the maximum distance the spring is compressed.
Determine the direction of the net electrostatic force on charge q3 (angle with respect to the positive x-axis).
In a chase scene, a movie stuntman is supposed to run right off flat roof of one city building and land on another roof 1.7m lower. If the gap between the buildings is 4.4m wide, how fast must he run.
Two particles with charges +6e and -2e are initially very far apart (effectively an infinite distance apart). They are then fixed at positions that are 4.92 x 10-10 m apart. What is EPEfinal - EPEinitial, which is the change in the electric potent..
Given that the goal is to allow all vehicles to come safely to a stop before reaching the intersection, calculate the maximum desired speed limit
A charge +q is at the origin. A charge -2q is at x = 8.50 m on the +x axis, For what finite value of x is the electric field zero
four charges, q1=1.5 nC, q2=4nC, q3=20nC and q4=-1nC are placed so that q4=(0,0) q1 is north of q4 and .5m away q2 is east of q4 and 1.0m away q3 is SW of q4 at angle of 36.9 degrees
If the slope is not frictionless so that the skier has a final velocity of 6 m/s, compute the force of friction (assuming it is constant), and the coefficient of kinetic friction.
To fight a fire on the fourth floor of a building, firefighters want to use a hose of diameter 6.31cm to shoot 925 liters/minute of water to a height of 11m, What pressure must the water have inside the hose
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