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When you irradiate a metal with light of wavelength 435 nm in an investigation of the photoelectric effect, you discover that a potential difference of 1.27 V is needed to reduce the current to zero. What is the energy of a photon of this light in electron volts? Find the work function of the irradiated metal in electron volts.
define the magnitude of the initial velocity. use 9.81 m/s^2 for the acceleration due to gravity on earth.
A milliammeter reads 15mA full scale. It consists of a 0.20 Ohm resistor in parallel with a 36 Ohm galvanometer
Airplane A , starting from rest with constant acceleration, requires a runway 600{\rm m} long to become airborne.
You are piloting a small plane that can maintain an air speed of 136.5 kt (knots, or nautical miles per hour), At that heading, what will be your ground speed
Calculate the energy in of a photon of radiation. A projectile is fired straight upward at 141 m/s. How fast is it moving at the the top of its trajectory? assume it is launched upward at 45 degrees about the horizontal plane. How fast is it moving..
The punter on a football team tries to kick a football so that it stays in the air for a long "hang time". If the ball is kicked with an initial velocity of 25.0 m/s at an angle of 60.0 degrees above the ground, illustrate what is the "hang time"?
A small body of mass 0.28 kg is undergoing simple harmonic motion of amplitude 4.0 cm and period 0.10 s. What is the maximum value of the force acting on it? If the oscillations are produced by a spring, what is the spring constant?
A very early, simple satellite consisted of an inflated spherical aluminum balloon 30 m in diameter and of mass 20 kg. What is the gravitational force on the meteor from the satellite at the closest approach
How much time elapses between first splash and second splash
Two balls of putty, each mass m, move in opposite directions toward each other with speeds of 0.95. What is the mass of this ball of putty
A 0.6410-kg ice cube at -12.40°C is placed inside a chamber of steam at 365.0°C. Later, you notice that the ice cube has completely melted into a puddle of water.
For many years Colonel John P. Stapp, USAF, held the world's land speed record. He participated in studying whether a jet pilot could survive emergency ejection.
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