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A rock is dropped from a sea cliff and the sound of it striking the ocean is heard 3.8 s later. If the speed of sound is 340 m/s, how high is the cliff? Give answer in meters.
Neptune has a mass of 1.02 1026 kg and a radius of 2.48 107 m. Assume it is a uniform solid sphere. What is the rotational kinetic energy of Neptune on its axis
A 775-g object undergoes an acceleration given by = (2.00 ? + 5.00 ?) m/s , find the resultant force acting on the object
Find out the maximum height reached by the rocket.
A 0.70-kg disk with a rotational inertia given by MR2/2 is free torotate on a fixed horizontal axis suspended from the ceiling. A string is wrapped around thedisk and a 2.0-kg mass hangs from the free end.
Velocity has a magnitude and a vector. consider a boat moving initally with velocity of 30 m/s directly west. What is the change in velocity
A light beam containing red and violet wavelengths is incident on a slab of quartz at an angle of incidence of 50.7°. Find the dispersion of the slab
in order to improve sharpness of pictures photographers sometimes decrease lenss aperture i.e. cover part of the lens.
Joe is moving through space at an unknown speed. His clock runs 4 minutes per hour slower than Jane's clock, How fast is Joe moving
Moon effect. Some people believe that the Moon controls their activities. If the Moon moves from being directly on the opposite side of Earth from you to being directly overhead, by what percentage does (a) the Moon's gravitational pull on you inc..
Compute the final temperature using the ideal gas law and van der Waals equations of state. Assume that Cvm = 3/2 R and the van der waals parameters for Argon are a = 1.355 dm6bar/mol2 and b = 0.0320 dm3/mol.
A 1500 {rm kg} car skids to the halt on a wet road where mu_k = 0.50. How fast was the car travelling if it leaves 66-{rm m}-long skid marks.
A 57.3-kg crate rests on a level floor at a shipping dock. The coefficients of static and kinetic friction are 0.770 and 0.405, What horizontal pushing force is required to just start the crate moving
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