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the light intensity incident on a metallic surface with a work function of 1.17eV produces photoelectrons with maximum kinetic energy of 4.17eV. if the frequency of the light is doubled, what is the maximum kinetic energy of the photoelectrons?
A lens of focal length 15.0 cm is used to create an image of the Full Moon. What is diameter of the image? The Moon's radius and average distance from Earth are 1.74× 106m and 3.85× 108 m, respectively
Two charged balls are 20.0 cm apart. They are moved, and force on each of them is tripled. How far apart are they now.
An asteroid is discovered heading straight toward Earth at 15km/s. An international team manages to attach a giant rocket engine to the asteroid. The rocket fires for 10 min, after which the asteroid is moving at 29degree to its original path at a..
The magnitude of a uniform electric field between the two plates is about 2 × 105 N/C. If the distance between these plates is 0.1 cm
At an amusement park there is a ride in which cylindrically shaped chambers spin around a central axis, What is the radius of a chamber
Concept to find certain type of electronic devices & circuits.
A radio receiver can detect signals with electric field amplitudes as small as 210?V/m. What is the intensity of the smallest detectable signal
the first-order line of 571 nm light falling on a diffraction grating is observed at a 17.9 deg angle, at what angle will the third order be observed
An air puck of mass 0.029 kg is tied to the string and allowed to revolve in a circle of radius 2.0m on a frictionless horizontal surface. The other end of the string passes through a hole in the center of surface, and a mass of 2.6 kg is tied to it...
If the ultimate shear strength of steel is taken to be 2.50x 10^9 Pa, what force is required to punch through a steel plate 2.2cm thick? Assume the superhero's fist has cross-sectional area of 8.00x 10^1 cm2 and is approximately circular.
A pendulum is 1.20 metres long. What is the speed of the bob when it passes by its equalibrium position if it is pulled aside until it makes an angle of 25 degrees to vertical.
If the accelerating plates are 1.60 apart, and have a potential difference of 2.60×10^4, what is the magnitude of the uniform electric field between them.
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