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The acceleration due to gravity on the Moon's surface is known tobeabout one-sixth the acceleration due to gravity on theEarth.

An astronaut on the Moon fires a projectile from a launcher on a level surface so as to get the maximum range. If the launcher gives the projectile a muzzle velocity of 25m/s, what is the range of the projectile? [Hint: The acceleration due to gravity on the Moon is only one sixth of that on the Earth.]

What percentage is the maximum range of a projectile if the initial velocity is increased by 10%?

A 5.1 g marble is fired vertically upwardusing a spring gun. Thespring must be compressed 8.0 cm if themarble is to just reach atarget 13 mabove the marble's position on the compressed spring.

What is the spring constant of a spring that is compressed 0.2 m and has 1.50 J of elastic potential energy stored in it?

6.1 A wastewater is treated in an aerobic CSTR with cell recycle. Determine mi, 6m and S if the following parameters hold: K = 50 mg/1, = 5 g/g VSS-d,

     b= 0.06 d,Y = 0.06 g VSSa/g, and 9= 220 mg/1.