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An airplane is flying with velocity (152, 0) m/s. It is accelerated in the x direction by its propeller at 8.92 m/s2 and in the negative y direction by a strong downdraft at 1.21 m/s2. Obtain what is the airplane velocity after 3 seconds?
Electrons are ejected from a metallic surface with speeds ranging up to 4.60 × 105 m/s when light with a wavelength of 625 nm is used. What is the cutoff frequency for this surface
A particle with a charge of -8.5μC is traveling East with a speed of 45m/s in a region with a magnetic field of 0.30T. If the direction of the magnetic field is South, What is the direction of the magnetic force?
A wind turbine is initially spinning at a constant angular speed. As the wind's strength gradually increases, the turbine experiences a constant angular acceleration of0.190 rad/s2. What is the initial angular velocity of the turbine
If you had only one telescope and wanted to take both visible-light and ultraviolet pictures of stars, explain where should you locate your telescope
A flat, solid cylindrical grinding wheel with a diameter of 26.0cm is spinning at 2900rpm when its power is suddenly turned off. A workman continues to press his tool bit toward the wheel's center
Find equation for the ground state energy for a particle in a spherically symmetric potential well,V(r) = -ad(r-a), and show that the bound state appears only when a is greater than some critical value.
Why were the relative intensities of an element's spectral lines NOT all the same? The next corresponding hydrogen line in the Balmer series shouldbe due to the n=7 to n=2 transition. Calculate the wavelength of this line and offer an explanation ..
a 8.4 kg mass is attached to a light cord that passes over a massless frictionless pulley. the other end of the cord is
A laser produces a 3.10-mW beam of light, consisting of photons with a wavelength of 610.1 nm. (a) How many photons are emitted by the laser each second? photons/s (b) The laser beam strikes a black surface and is absorbed. What is the change in the ..
three point charges lie along the y axis. a charge of q1 -9.28 microc is at y 6.26 m and a charge of q2 -7.56 microc
While moving down the track at 10.0 m/s, you uniformly accelerate to 32.0 m/s in 10 s. Illustrate what is the average net force that you have applied to the car during the 10 s interval?
A Carnot engine has 40 g of Helium gas as its working substance. Calculate the work generated by this engine during one cycle
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