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A positron and an electron each of mass 9.1 x 10-31kg are in the same general vicinity and have very small initialspeeds. They then annihilate each other producting two photons
a) What is the approximate energy of each emerging photon?b) What is the angle between the paths of the emerging photons?
A thin rod consists of two parts joined together. One-third of it is silver and two-thirds is gold. The temperature decreases by 31.3 C°. Determine the fractional decrease ?L/(LSilver + LGold) in the rod's length, where LSilver and LGold are the init..
A radio tower is broadcasting an isotropic radio wave with a power of 1000 watts. What is the radiation pressure on a reflecting surface 250 meters away from the tower?
If 3.43×10^8 electrons flow through the ground wire to Earth and the ground wire is then removed, what is the net charge on the electroscope.
A block with mass m = 2.00 kg is placed against a spring on a frictionless incline with angle ? = 34°. (The block is not attached to the spring). What is the change in the gravitational potential energy of the block-Earth system
A physics book (mass=3.0 kg) is given a horizontal velocity of 4.0 m/s out the window. Determine the work down by gravity while the book is in between the two windows
A standing wave in a pipe with both ends open has a frequency of 206. Hz. The next higher harmonic has a frequency of 309. Hz. How long is the pipe
A 0.410-kg blue bead slides on a frictionless, curved wire, Find the maximum height the green bead rises
A 2.0-kg projectile is fired with initial velocity componentsV0x=30 m/s andV0y=40m/s from a pointon the earth's surface. How much work was done in firing the projectile
Two trains approach each other on parallel tracks. how long (in seconds) will it be before they pass each other
A 3000kg rocket and its 500 kg payload are traveling at a speed of 2000m/s. what is the velocity of the payload after separation
A bug is splattered on a car windshield. Evaluate the magnitude of the windshield's force on the bug to the magnitude of the bug's force on the windshield.
Two billiards of equal mass undergo a perfectly elastic head on collision. if the mass of ball 1 was initially was initially 5.00 m/s, and that of ball 2 was 6.00 m/s in the opposite direction, what will be their speeds after the collision? ball 1 m/..
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