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An aluminum bar of mass 2.00kg at 300 C is thrown into a lake. The temperature of the water in the lake is 15.0 C; what is the change in total entropy Delta
A woman on a bridge 81.0 m high sees a raft floating at a constant speed on the river below. Find the speed of the raft
Tarzan, who weighs 900N, swings from a cliff at the end of a 40.0 m vine that hangs from a high tree limb, What is the magnitude of Tarzan's acceleration
The school bus picks up Brian in front of his house and takes him on a straight-line 3.4 km bus ride to school in the positive direction. what is the position of the school
Suppose a car is traveling at +23.7 m/s, and the driver sees a traffic light turn red. After 0.360 s has elapse, What is the stopping distance of the car
rocket, initially at rest on the ground, accelerates straight upward from rest with constant acceleration 44.1m/s^2. Find the maximum height ymax reached by the rocket
A physics book slides off a horizontal tabletop with a speed of 2.70m/s . It strikes the floor in 0.350s. Find the direction of book's velocity, just before the book reaches the floor
Anita and Nick are playing tug-of-war near a mud puddle. They are each holding on to an end of a taut rope that has a knot exactly in the middle. What is the location of the knot relative to the cen
A wire that has a resistance of 5 is passed through an extruder so as to make it into a new,What is the resistance of the new wire
Estimate the phase difference between the sounds received by your ears when you are facing 90° away from the direction of the source
You perform a double-slit experiment in order to measure the wavelength of the new laser that you received for your birthday. What is your laser's wavelength expressed in nanometers
A silver coin has the mass of 17.75g. If the atomic mass of silver is 107.868u, how many silver atoms are in the coin
A small ball is thrown horizontally out of a window 7.50 m above the ground. With what speed was it thrown
A VW Beetle goes from 0 to 60 mi/hr with an acceleration of +2.35 m/s2. Find the acceleration (in m/s2) of the dragster
An electron starts from rest 2.88 cm from the center of a uniformly charged sphere of radius 1.99 cm. how fast will the electron be moving when it reaches the surface of the sphere
Here is the data found: This is OHM'S LAW experiment Trial Voltage Current Resistance, What is the uncertainty of this measurement
A woman at an airport is towing her 14.0-kg suitcase at constant speed by pulling on a strap at an angle, What is the magnitude of the normal force that the ground exerts on the suitcase
In a bizarre experiment devised by a physics teacher and an industrial arts teacher at a local high school, Find the mass of ethylene glycol m_c in kilograms to three significant digits
An insulating rod of length 8.0-cm and charge 30 nC is in a plane with a long straight uniform line charge. What is the electric force on the rod
A metal rod is 40.127cm long at 20.3 oC and 40.149cm long at 45.0 oC. Calculate the average coefficient of linear expansion of the rod's
Steel train rails are laid in 12.2m -long segments placed end to end. The rails are laid on a winter day when their temperature is -2.00 oC. what is the stress in them on a summer day when their temp
A steel bridge is built in the summer when its temperature is 35.5oC. What is the length of the bridge on a cold winter day when its temperature is -11.5 oC
The supersonic aircraft Concorde has a length of 62.2m when sitting on the ground on a typical day when the temperature is 12.0 oC. What is the temperature of the Concorde's skin in flight
an arrangement in which four disks are suspended by cords. The longer, top cord loops over a frictionless pulley, What are the masses of each disk
Two cylinders, made from the same material and having the same length, have radii r1 and r2 with r1 > r2. Find the final angular velocity of the smaller cylinder