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In a photoelectric-effect experiment it is observed that no current flows unless the wavelength is less than 530nm
What is the work function of this material?
What stopping voltage is required if light of wavelength 430nm is used?
A circular loop in the plane of a paper lies in a 0.65T magnetic field pointing into the paper. What is the average induced current if the coil resistance is 2.3
Suppose that the mass of the dishwater is large as much as necessary so that its temperature does not change appreciably.
A baseball pitcher can throw a ball with a speed of 40m/s . He is in the back of a pickup truck that is driving away from you. What is the speed of the truck
The two stick together and move off with a speed of 4.0 m/s. Evaluate what is the mass of the second car?
A radio galaxy has an angular extent of 2°, and the associated optical galaxy has its spectral lines redshifted by 15% of their rest wavelength
Two people stand 3 m in front of large plane mirror and space 5m a part in dark room at what angle of incidence should one of them shine a flashlight on the mirror so that reflected beam directly strickes the other person.
An artillery shell is red with an initial velocity of 328 m/s at 51.1 degrees above the horizontal. To clear an avalanche, it explodes on a mountainside 42.1 s after fi ring. What are the (a) x and (b) y coordinates of the shell where it explod..
A second baseman tosses the ball to the first baseman, who catches it at the same level from which it was thrown, What is the y component of the ball's velocity
A hotel elevator ascends 170 {rm m} with a maximum speed of 5.90 {rm m/s}. Its acceleration and deceleration both have the magnitude of 1.3 {rm m/s^2}.
A 3.11kg stone is tied to a thin, light wire wrapped around the outer edge of the uniform8.23kg cylindrical pulley, What is the rotational inertia of the pulley
Explain how much mechanical energy is lost due to friction acting on the runner? How far does he slide?
The intersection is 15 m wide. Her car's maximum deceleration is -6.8m/s2, whereas it can accelerate from 43km/h to 70km/h in 8.1 s. Overlook length of her car and her reaction time.
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