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You place a tray containing 320g of water at 14oC in your freezer.How much energy must be removed to turn the water to ice at -19oC?
A 6,400-kg truck runs into the rear of a 1,000-kg car that was stationary. What was the speed of the truck before the collision
A vacationer floats lazily in the ocean with 95% of his body below the surface. The density of the ocean water is 1025 kg/m3. What is the vacationer's average density
A 2.00-mol sample of hydrogen gas is heated at constant pressure from 302 K to 414 K. Calculate the increase in its internal energy
When she leaves the track, she follows the characteristic path of projectile motion. Ignoring friction and air resistance, find out the maximum height H to which she rises above the end of the track.
Halley's comet, which passes around the Sun every 76 years, hasan elliptical orbit. When closest to the Sun (perihelion) it is ata distance of 8.823 x 1010 m, Calculate its speed at aphelion
Four capacitors are connected to a battery as shown below. The voltage V delivered by the battery is unknown. Capacitor C1 acquires a charge of magnitude |Q1|=15 nC=15*10^-9 C on each of its plates. What is the equivalent capacitance of the circuit..
an electromagnetic wave strikes a 2.40-cm2 section of wall perpendicularly. the rms value of the waves magnetic field
A cosmic-ray proton in interstellar space has an energy of 18.0 MeV and executes a circular orbit having a radius equal to that of Jupiter revolving around the Sun (7.78 x 1011 m). Obtain the magnetic field in that region of space
A horizontal string can transmit a maximum power P0(without breaking) if a wave with amplitude A and angular frequency? is traveling along it. Determine the max power that can be transmitted
What is the potential difference across one wire of a 70 m extension cord made of 16 gauge copper wire carrying a current of 9 A at room temperature (20degrees Celsius)
Consider an RC-circuit with R = 2 kOhm's, C = 500 µF, and E = 12 V and a switch. Calculate the time constant of the circuit
A diver springs upward from a diving board. at instant she contacts the water , her speed is 8.90m/s. and her body is extended at an angle7.50degrees. with respect to the horizontal surface of the water, at this instant her vertical displacement is -..
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