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Question1
A rocket with mass M is fired vertically upward. At an instant it reaches an altitude of 800m and a speed of v=350 m/s, it explodes into 3 fragments. One fragment with mass 1/2M moves upward with the speed of v1=400m/s following the explosion. The second fragment with mass 1/4M has the speed of v2= 260 m/s moving east after explosion. What's the third fragment right after the explosion?
Question2
Two window washers, Bob and Joe, are on a 3.00 m long, 325 N scaffold supported by two cables attached to its ends. Bob weighs 810 N and stands 1.00 m from the left end. Two meters from the left end is 500 N washing equipment? Joe is 0.500 m from the right end and weighs 870 N. known that the scaffold is in rotational and translational equilibrium, what are the forces on each cable?
At what temperature is the diameter of the hole equal.
A projectile is fired at an angle of 55 degrees above the horizontal with an inital speed of 35.0 m/s. What is the magnitude of the horizontal component of the bullet's
A possible means for making an airplane invisible to radar is to coat the plane with an antireflective polymer. how thick would you make the coating
Use the blackbody radiation law to estimate the wavelength of maximum intensity for the light from the sun's photoshere
A 0.40-kg iron horseshoe is dropped into 1.15L of water in a 0.34-kg iron pot initially at 20.0?C. Determine the initial temperature of the hot horseshoe.
In a vacuum a proton (charge =1.60 E-19 C, mass = 1.67×10-27 kg) is moving parallel to a uniform electric field that is directed along the +x axis, Determine the acceleration of the proton
A horizontal block-spring system with the block on a frictionless surface has total mechanical energy E = 39.1 J, What is the kinetic energy of the system at the equilibrium point
A rock is dropped from a high tower and falls freely under the influence of gravity. Which one of the following statements concerning the rock as it falls is true? Neglect the effects of air resistance.
Two long parallel wires carry currents of 2.71 A and 5.93 A. Find the separation distance of the wires
A car travels at a constant speed around the circular track or a radius of 2.6 km. it goes around the track once in 360 seconds.
Illustrate the security threats that An industry will face when it implements a wireless network. Suppose that the industry occupies the six middle floors
Determine the maximum and minimum of the absolute value of the magnetic flux through a large triangular wire loop that has three equal sides of 1.85 m
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