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On a spacecraft two engines fire for a time of 541 s. One gives the craft an acceleration in the x direction of ax = 5.13 m/s2, while the other produces an acceleration in the y direction of ay = 7.28 m/s2. At the end of the firing period, the craft has velocity components of vx = 3716 m/s and vy = 4869 m/s. Calculate the magnitude of the initial velocity.
A spring-loaded cannon aimed at 47 deg. above the horizontal is on the last car of a long train of flat cars. How far from the cannon on the train does the projectile land
An electromagnetic wave of wavelength 405 nm is traveling in vacuum in the -z direction. What is the magnetic-field amplitude of this wave
Two dogs pull horizontally on ropes attached to a post; the angle between the ropes is 50.0 deg. Find the angle the resultant force makes with the rope of dog A
A fun-loving 11.4 {rm kg} otter slides up a hill and then back down to the same place. If she starts up at 5.75 {rm m/s} and returns at 3.75 {rm m/s}, how much mechanical energy did she lose on the hill.
A weight of 30.0 N is suspended from a spring that has a force constant of 190 N/m. The system is undamped and is subjected to a harmonic driving force of frequency13.0 Hz, resulting in a forced-motion amplitude of 5.00 cm. Determine the maximum valu..
A contact lens is made of plastic with an index of refractionof 1.60. The lens has a focal length of +23.0 cm, What is the radius of curvature of the outer surface
A wodden raft has a density of 0,5*10^3kg/m^3 and dimension of 3,05m*6,1m*0,305m. How deep does it sink into the water when unloaded
A friend of yours is loudly singing a single note at 380Hz while racing toward you at 26.5m/s on a day when the speed of sound is 346m/s. What frequency does your friend hear if you suddenly start singing at 380Hz
suppose that 1.00 g of hydrogen is separated into electrons and protons. suppose also that the protons are placed at
Suppose 1.00kg of water at 100 degrees Celsius is mixed with 1.00kg of water at 0 degrees Celsius. What is the total charge in entropy of the mixture
A ray of light passes from air through dense flint glass and then back into air. How far is the ray displaced as a result of traveling through the glass
At one instant a bicyclist is 28 m due east of a park's flagpole, going due south with a speed of 8 m/s. after that, 11 s later, the cyclist is 65 m due north of flagpole, going due east with a speed of 10 m/s.
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