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What mass (in grams) of steam at 100°C must be mixed with 146 g of ice at its melting point, in a thermally insulated container, to produce liquid water at 25.0°C? The specific heat of water is 4186 J/kg·K. The latent heat of fusion is 333 kJ/kg, and the latent heat of vaporization is 2256 kJ/kg.
A spaceship of mass 2.30×106kg is cruising at a speed of 4.30×106m/s when the antimatter reactor fails, blowing the ship into three pieces. What is the speed of the third piece
A long solenoid has 150 turns/cm and carries current i. An electron moves within the solenoid in a circle of radius 2.40 cm perpendicular to the solenoid axis. The speed of the electron is 0.056 c (c = speed of light). Find the current i in the solen..
On a clear day at a certain location, a 150-V/m vertical electric field exists near the Earth's surface. At the same place, the Earth's magnetic field has a magnitude of 4.800 10-5 T. Compute the energy density of the electric field.
A silicon sample is doped with phosphorus at 1.17 parts per 1.00*10^6, Calculate the number of free (conduction) electrons per unit volume of the doped silicon in conduction electrons per cm^3
in a marathon race chad is out in front running due north at a speed of 3.93 ms. john is 95 m behind him running due
A 0.450kg rock is dropped 14.0m into 3.0kg of water. If all the rock's kinetic energy is converted to thermal energy in the water, what's the water's temperature increase
A crate with mass 34.5kg initially at rest on a warehouse floor is acted on by a net horizontal force of 138N. What acceleration is produced
Calculate the rate of heat conduction through house walls that are 13.0cm thick and that have an average thermal conductivity twice that of glass wool. Assume there are no windows or doors.
Two 3.0 g spheres are suspended by 11.0 cm long light strings. A uniform electric field is applied in the x direction. determine the electric field intensity that enables the spheres to be in equilibrium at ? = 9°
A 0.29 F capacitor is desired. What area must the plates have if they are to be separated by a 3.7 mm air gap
Apollo 14 astronaut Alan B. Shepard Jr. used an improvised six-iron to strike two golf balls while on the Fra Mauro region of the moon's surface, What is the numeric value of the ratio
Tall Pacific Coast redwood trees (Sequoia sempervirens) can reach heights of about 106 . If air drag is negligibly small, how fast is a sequoia cone moving when it reaches the ground
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