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An unknown material has a normal melting/freezing point of -20.6 °C, and the liquid phase has a specific heat capacity of 143 J/(kg C°). One-tenth of a kilogram of the solid at -20.6 °C is put into a 0.113-kg aluminum calorimeter cup that contains 0.171 kg of glycerin. The temperature of the cup and the glycerin is initially 26.3 °C. All the unknown material melts, and the final temperature at equilibrium is 18.0 °C. The calorimeter neither loses energy to nor gains energy from the external environment. What is the latent heat of fusion of the unknown material?
A 1800 kg pile driver is used to drive a steel I-beam into the ground. The pile driver falls 6 m before coming into contact with the top of the beam, and it drives the beam 14.0 cm farther into the ground before coming to rest.
An aluminum wire having a cross-sectional area equal to 2.70 10-6 m2 carries a current of 6.50 A. The density of aluminum is 2.70 g/cm3. calculate the drift speed of the electrons in the wire
A capacitor consists of square conducting plates 28cm on a side and 5.5mm apart, carrying charges ± 1.8?C, Find the stored energy
A wooden raft has a mass of 59 kg. When empty it floats in water (density 1000 kg/m3) with 59 percent of its volume submerged. What mass of sand can be put on raft without it sinking.
A 5 kg mass attached to a horizontal spring is pulled from its equilibrium position by 3 m and let go. what is the maximum velocity of the mass
A point charge with charge q1 = 2.80?C is held stationary at the origin, How much work W is done by the electrostatic force on the moving point charge
An automobile club plans to race a 710 kg car at the local racetrack. The car needs to be able to travel around several 160 m radius curves at 93 km/h. What must the banking angle of the curves be so that the force of the pavement on the tires of ..
A man walks at 3 m/s on a still day along the line between two fire stations. Find the apparent frequency of each whistle
Consider an infinite arrangement of capacitors shown in the figure. C1= nF and C2 = nF. What is the equivalent capacitance Ceq
Find out ratio of the detector
A solid block of wood is a cube whose volume is 1x10^-3m^3. When dropped into a swimming pool, How much does the block of wood weigh
What is the density of Kripton gas at standard temperature and pressure? The atomic mass of Kripton is 83.80 atomic mass unit
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