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Commercial cold-packs consist of solid ammonium nitrate and water. Ammonium nitrate absorbs 330 J of heat per gram dissolved in water. In a coffee-cup calorimeter, 2.00 g of ammonium nitrate are dissolved in 75.0 g of water at 30 degrees Celsius. Assuming that all of the heat is lost from the water, what is the final temperature of the water? The specific heat of water is 4.18 J C-1 g-1
In a series circuit, a generator (1384 Hz, 14.4 V) is connected to a 17.1-? resistor, a 3.69-µF capacitor, and a 5.72-mH inductor. Find the voltage across each circuit element
A ranger in a national park is driving at 41km/h when a deer jumps onto the road 66 m ahead of the vehicle. After a reaction time of t s, ranger applies the brakes to produce an acceleration of -3.20m/s2. What is the maximum reaction time allowed ..
The isotope lithium-7 has a mass of 7.0160 atomic mass units, andthe isotope lithium-6 has a mass of 6.0151 atomic mass units. calculate the average atomic mass of lithium
Consider two antennas separated by 14.0 mthat radiate in phase at 85 MHz. Areceiver placed 150 m from both antennas measures an intensity/0. The receiver is moved so that it is2.2 m closer to one antenna than the other.
A copper rod has a length of 1.2 m and a cross-sectional area of4.0 x10-4 m2. One end of the rod is incontact with boiling water and the other with a mixture of ice andwater. What is the mass of ice per second that melts? Assume that no heat is lo..
What is the flux of the magnetic field through this tile in the vicinity of this tile, the magnetic field is approximately B=300 MN/C in a direction 37 degrees up from the horizontal? And what would be the flux if the magnetic field has a magnitud..
A satellite is in a circular orbit very close to the surface of a spherical planet. The period of the orbit is 2.50 hours. What is the density of the planet? Assume that the planet has a uniform density.
A 3kg object moving along the positive x direction with a speed of 10m/s exploeds into a 2kg and a 1kg fragments. what is the speed of the 2kg fragment?
A ball of mass m is suspended from a rope of length R. the ball is set into freely swinging circular motion in a vertical plane. Find the centripetal acceleration of the ball at the bottom of the circle
A block of mass 3.1 kilogram rests on a frictionless inclined plane, held in place by a string of mass 0.023 kilogram. Determine how long does it take a wave to travel from one end of the string to the other
When you lift a bowling ball with a force of 80.2 N, the ball accelerates upward with an acceleration a. Calculate the weight of the bowling ball
an airplane has a mass of 33500 kg and takes off under the influence of a constant net force of 37500 n. what is the
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