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The surface of the Sun is approximately at 5700 K, and the temperature of the Earth’s surface is approximately 280 K. What entropy change occurs when 860 J of thermal energy is transferred by heat from the Sun to Earth?
You digitize a 10-kHz signal by sampling it at twice the highest frequency (i.e 20,000 times a second) and encoding the the intensity in 8-bits. What is the resulting data rate
the transmutation reaction 194Po -> 33Al + ___ + 31n, What is the full name of the daughter atom
A hole is drilled straight through the center of the planet Foosbane. The planet is remarkable in that its density is constant, independent of depth, what is the period of oscillation of the pebble
A device found at some amusement parks asks you to "test your personal force" by grasping two conducting bars, What voltage does the machine have to apply to the conducting bars to drive a current of 30.0 mA through your body
Two sound speakers separated by a distance of 3-meters, are driven in phase by same audio amplifier. A listener sits directly in front of one speaker at a distance of 4 meters from it so that listener and speakers form a right triangle.
What is the electric field strength between the disks? A proton is shot from the negative disk toward the positive disk. What launch speed must the proton have to just barely reach the positive disk?
The plane of a single circular loop with radius 0.1 m is held so the area vector of the loop is facing the North direction. what is the induced EMF in the loop
When light with a wavelength of 228 nm is incident on a certain metal surface, Determine the wavelength of light that should be used to double the maximum kinetic energy of the electrons ejected from this surface
A projectile is fired at an angle of 45° with initial kinetic energy E0. At the top of its trajectory, What is the speed of the first fragment
A professional boxer hits his opponent with a 1000 N (225 lb) horizontal blow that lasts for 0.15 s. Calculate the impulse imparted by his blow
A 39.00 g ball is fired horizontally with initial speed v_0 toward a 110g ball that is hanging motionless from a 1.00 m-long string. The balls undergo a head-on, perfectly elastic impact, after which the 110 g ball swings out to a highest angle th..
A bottle of saline solution (with a specific gravity of 1.02) is attached to a 1.2 m long piece of tubing with a 1.0 cm inner diameter. If the tubing is held vertically, filled with saline, and clamped at the bottom, (a) what is the gauge pressure at..
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