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(a) What is the entropy change of a 15.2 g ice cube that melts completely in a bucket of water whose temperature is just above the freezing point of water? (b) What is the entropy change of a 4.27 g spoonful of water that evaporates completely on a hot plate whose temperature is slightly above the boiling point of water?
an object falls freely from height h. it is released at time zero and strikes the ground at time t.a when the object is
A flat circle of radius 20 cm is placed in a uniform electric field of magnitude 6.6×102N/C, What is the electric flux through the circle when its face is at 30 to the field lines
A nuclear power reactor generates 4.2 × 109 W of power. In one year (365.25 days), what is the change in the mass of the nuclear fuel
A 70 turn, 10.0 cm diameter coil rotates at an angular velocity of 8.00 rad/s in a 1.15 T field, At what time is the peak emf first reached
In daily life we see many cases of people who are caught misrepresenting things who soon thereafter are excused and accepted by their contemporaries. How is This different in science.
The angular position of a point on the rim of a rotating wheel is given by %u03B8 = 4.01t - 6.34t2 + 2.63t3, What are the angular velocities at t = 3.19 s and t = 6.06 s
An intense light source radiates uniformly in all directions. What is the total average power output of the source
AM radio signals have frequencies between 550 kHz and 1600 kHz (kilohertz) and travel with a speed of 3.0×108m/s. What are the wavelengths of these signals
Find the mechanical energy of a block-spring system having a spring constant of 0.67 N/cm and an oscillation amplitude of 1.5 cm
two conducting spheres, one of radius 6.0 cm, and the other of radius 120 cm, each have a charge of 20 nC, calculate the surface charge density of each sphere
A covex lens of focal length 10 cm placed 40 cm in front of aconcave lens of focal length 25 cm.A small object is placed 20 cmin front of the convex lens calculate the location of the finalimage relative to the second lens. Include a ray diagram
A 20.0 kg crate sits at rest at the bottom of a 12.9 m long ramp that is inclined at 33 degrees above the horizontal. What is the total work done on the crate during its motion from the bottom to the top of the ramp
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