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A college student is working on her physics homework in her dorm room. Her room contains a total of 6x 10^26 gas molecules. As she works, her body is converting chemical energy into thermal energy at a rate of 125 W. If her dorm room were an isolated system (dorm rooms can certainly feel like that) and if all of this thermal energy were transferred to the air in the room, by how much would the temperature increase in 8.0 min? Express your answer using two significant figures.
A magnetic field of 3 Tesla is oriented into the page. A 10 cm long conducting bar is pulled to the right at a constant speed of 3.4 m/s. What is the magnitude of the current in the bar
A 1200-kg station wagon is moving along a straight highway at 12.0 m/s. Another car, with mass 1800 kg, Find the total momentum of the system
A gamma-ray photon produces an electron and a positron, each with a kinetic energy of 259keV, Determine the energy of the photon
Two 1000 kg cars drive east; the first moving at 25 m/s, the second at 15 m/s. What is the magnitude of the total momentum of the system
A star rotates in a circular orbit about the center of its galaxy. The radius of the orbit is 1.5 x 1020 m, and the angular speed of the star is 3.7 x 10-15 rad/s. How long (in years) does it take for the star to make one revolution around the center..
The molecular mass of helium is 4 g/mol, the Boltzmann's constant is 1.38066×10^?23J/K, the universal gas constant is 8.31451 J/K· mol, What is the average kinetic energy of each helium atom
What are the x and y acceleration components of a 5 kg particle subject to Force 1 (F1x = 4.6 N and F1y= -2.1 N) and Force 2 (F2x=-2.8 N and F2y= 5 N)
As a bowling ball of radius 14.0 cm rolls down the alley to the right, a frictional force of magnitude 1.22 N, Find the frictional torque with respect to an axis through the center of the ball
A bowling ball weighing 71.2 is attached to the ceiling by a 3.50 rope. The ball is pulled to one side and released; it then swings back and forth like a pendulum. As the rope swings through its lowest point, speed of the bowling ball is measured a..
A dentist's drill starts from rest. After 3.53 s of constant angular acceleration it turns at a rate of 2.66E+4 revolutions per minute. Determine the angle through which the drill rotates
When a hammer strikes a nail, it is compressed along its length. What is the impulse imparted to the hammer
The K series of the discrete x-ray spectrum of tungsten contains wavelengths of 0.018 5 nm, 0.020 9 nm, Determine the ionization energies of the L, M, and N shells
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