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Interstellar space has a magnetic field on the order of 0.1 nT. Matter in this space is mainly Hydrogen atoms (about 1 per cubic centimeter) moving with speeds of about 1 km/s. Compare the energy in the magnetic field to the Kinetic Energy of the atoms.
Two people stand 5.20 m apart and 4.00 m away from a large plane mirror in a dark room. At what angle of incidence should one of them shine a flashlight on the mirror so that the reflected beam straight strikes the other person.
A 3.4M? resistor is connected in series with an initially uncharged 0.29?F capacitor. This arrangement is then connected across four 1.5-Vbatteries, What is the maximum charge on the capacitor
Radius of rotation of the hanging mass in apparatus in lab M20a is set to 10.0 cm. Determine the centripetal force and suspended mass
A 4.0 capacitor is connected in series to a resistor. If an emf source is connected in series to this arrangement, what is the resistance of the circuit
Two point charges lie on the x axis. A charge of 6.2uC is at the origin, and a charge of -9.4uC is at x=10.0cm. What is the net electric field at x=+4.0cm
A vertical heat-insulated cylinder is divided into two parts by a movable piston of mass m. Find the final temperature of the gas
An x-ray beam with wavelength 0.270nm is directed at a crystal. What is the spacing d between the planes of the crystal
A typical coal-fired power plant burns 310 metric tons of coalevery hour to generate 780MW of electricity. 1metricton=1000kg. What is the power plant's thermal efficiency
A bus is traveling up a hill at a speed of 34m/s. The hill is 23 degrees relative to horizontal and the coefficient of static friction between the bus's tires and the road is 0.6
An artillery shell is fired with an initial velocity of 300 m/s at 47.5° above the horizontal. To clear an avalanche, it explodes on a mountainside 47 s after firing. What is the x and y components of the shell where it explodes, relative to its f..
Physics: Find the shear stress on the rod and vertical deflection at the end of the rod, A horizontal aluminum rod 4.2 cm in diameter projects 7.6 cm from a wall. A 1400 kg object is suspended from the end of the rod
A string length 2.0 m and linear mass density 25.0 mg/m vibrates at a fundamental frequency of 450.0 Hz. What is the speed of the transverse strin waves
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