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After 6.00 kg of water at 77.5 oC is mixed in a perfect thermos with 3.00 kg of ice at 0.0 oC, the mixture is allowed to reach equilibrium. When heat is added to or removed from a solid or liquid of mass m and specific heat capacity c, the change in entropy can be shown to be ?S = mc ln(Tf/Ti), where Ti and Tf are the initial and final Kelvin temperatures. Using this expression and the change in entropy for melting, find the change in entropy that occurs.
A solenoid is designed to produce a 2.74*10^-2T magnetic field near its center. what total length of wire is required to make this solenoid
q1. an airplane flies 200 km due west from city a to city b and then 315 km in the direction of 33.0deg north of west
While john is travelling along an interstate highway, he notices a 160 mile marker as he passes through town. Later John passes another mile marker, 119.
If the index of refractions of the red light is 1.4925, what is the index of refraction of the blue light?
A 160(ohm) resistor is in series with a 8.00×10^-2 H inductor and a 0.400uF capacitor. compute the phase angle of the source voltage with respect to the current
A uniform magnetic field is at right angles to the plane of a wire loop. The field decreases by 0.15 in 3.0×10-3 and the magnitude of the average emf induced in the loop is 85 V. What is the area of the loop
A string is attached to the center of a solid cylinder. The cylinder sits on a horizontal surface made of concrete and rolls without slipping. find the magnitude of the static friction acting on the cylinder
A horizontal circular platform rotates counterclockwise about its axis at the rate of 0.877 rad/s. You, with a mass of 70.5 kg, compute the total angular momentum of the system
A student of mass 33.5 kg wants to measure the mass of a playground merry-go-round, which consists of a solid metal disk of radius R = 1.50 m that is mounted in a horizontal position on a low-friction axle.
Find the magnetic energy stored in the air gap between two very large magnetic pole pieces, one North, one South, each with an area of 100 cm2. Assume the 0.05 T magnetic field is uniform within the 2-cm gap.
Assume that a spacecraft lands on an asteroid and bores a hole perpendicular to its surface, what is the circumference and radius of that asteroid
What must the separation be between a 6.7 kg particle and a 2.9 kg particle for their gravitational attraction to have a magnitude of 4.1 × 10-12 N
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