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Radiation with a wavelength of 308 nm shines on a metal surface and ejects electrons that have a maximum speed of 3.08e15 m/s. What type of metal is being hit by the 308 nm radiation? The values in parentheses are the candidate metal work functions: potassium (2.24 eV), calcium (2.71 eV), uranium (3.63 eV), aluminum (4.08 eV), or gold (4.82 eV). Use the photoelectric equation hf= KEmax + W0.
A solid piece of an unknown material wights 96.9 N in air and 59.6 N when submerged in water. The density of water is 1000 kg/m3, Determine the density of the material
124/55 Cs has a half-life of 30.8s. If we have 5.3µg initially, how many Cs nuclei are present and What is the activity at this time
A massive pulley in the shape of a solid disk is mounted on an axle with negligible friction. What is the mass of the pulley
An alpha particle approaches a 197 AU nucleus with a speed of1.5x10^7 m/s. In what direction does the nucleus recoil, and with what speed
a 4kg watermelon is balanced on bruces shaved. r. lee ermey who hates watermelons with every fiber of his being shoots
A driver starts his parked vehicle and within 5 sec reaches a velocity of 54 km/hr as he travels east. Find what is his acceleration
A 950-kg car traveling west at 15.0 m/s collides with a 750-kg car traveling north at 20.0 m/s. The cars stick together. Find the speed of the wreckage just after the collision
An air mattress is 2.08 m long, 0.657 m wide, and 12.6 cm deep. If the air mattress itself has a mass of 0.291 kg, what is the maximum mass it can support in fresh water
A transport plane takes off from a level landing field withtwo gliders in tow, one behind the other. what minimum length of runway is needed
question1a painter of mass 140.0 kg stands on a platform of mass 55.0 kg and pulls on two ropes that hang over pulleys
At age forty, a man requires contact lenses (f = 65.0 cm)to read a book held 25.0 cm from his eyes. At age forty-five, he finds that while wearing these contacts he should now hold a book 30.0 cm from his eyes.
What is value of Earths magnetic field
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