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A proton (m = 1.7 × 10–27 kg, q = +1.6 ×10–19 C) starts from rest at point A and has a speed of 40km/s at point B. Only electric forces act on it through this motion. Decide the electric potential difference.
An electron is located on a pinpoint having a diameter of 2.5 um. What is the minimum uncertainty in the speed of the electron
A student throws a set of keys vertically upward to his fraternity brother, who is in a window 3.60 m above. The brother's outstretched hand catches the keys 1.20 s later.
A 110 ball and a 250 ball are related by a 38--long, massless, rigid rod. The balls rotate about their center of mass at 150 what is the speed of the 110 ball.
A 650-kg car stopped at an intersection is rear-ended by a 1720-kg truck moving with a speed of 22 m/s. find the final speed of both vehicles after the collision
How did Marie and PierreCurie measure the radio activity of her pitchblende samples? How did she deduce that there must be unknown elements in the pitchblende – the ones she later found (Po and Ra)?
Helium gas with a volume of 2.55L , under a pressure of 1.26atm and at a temperature of 44.0?C, How many grams of helium are there? The molar mass of helium is 4.00g/mol
A cube of aluminum has an edge length of 20 cm. Aluminum has a density 2.7 times that of water (1 gram/cm$) and a specific heat 0.217 times that of water (1 cal/g °C). When the internal energy of the cube increases by 47000 cal its temperature increa..
biologically usefull technetium nucleuii at wt 99 have half life of 6 hours. a solution containing 10-12 gram of this
An electromagnetic wave has an electric field amplitude of 318 V/m. What is the root mean square of the electric field of the wave
A 3.34 bullet moving at 280 enters and stops in an initially stationary 3.40 wooden block on a horizontal frictionless surface. How much work was done in stopping the bullet
A record turntable rotates through 5.0 rad in 2.8 s as it is accelerated uniformly from rest. What is the angular velocity at the end of that time
the flywheel of an old steam engine is a solid homogeneous metal disk of mass m 117 kgand radius r 80 cm.the engine
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