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An astronaut on the moon fires a projectile from a launcher on a level surface therefore as to get the maximum range. If the launcher gives the projectile a muzzle velocity of 25 m/s determine what is the range of the projectile?
An object is released from rest and falls in free fall motion. The speed v of the object after it has fallen a distance y is given by v2 = 2gy, what is the percent uncertainty in the calculated value of g
a 9.5-kg monkey is hanging by one arm from a branch and is swinging on a vertical circle. as an approximation assume a
A plastic block of dimensions 2.5 cm x 3.8 cm x 4.0 cm has a mass of 28.0 g. What is the density of the block? If placed into a cup of water, will the block float or sink
A hydrogen atom emits a photon having an energy of 12.1 eV. What's the frequency of the photon
A boy of mass mboy stands at the edge of a merry-go-round of radius R = 3.9 m and mass mmgr, and both are initially at rest. Find the ratio of mboy to mmgr
a 6.60 capacitor that is initially uncharged is connected in series with a 4700 resistor and a 505 emf source with
A spring whose stiffness is 1000 N/m has a relaxed length of 0.49 m. what is the change in the potential energy of the spring
The femur is a bone in the leg whose minimum cross-sectional area is about 4.3 x 10-4 m2. Find the maximum stress that this bone can withstand
An aerosol can of whipped cream is pressurized at 440kPa when it's refrigerated at 3 C. The can warns against temperature in excess of 50 C. What is the safest pressure for the can .
what is the frequency of vibration of the string. If the shot was launched from 6.00 f above the ground at an initial angle of 42.0 degrees , what was its initial speed.
Sound is passing perpendicularly through an open window whose dimensions are 1.1 m x 0.75 m. How much sound energy comes through the window
A diathermy machine, used in physiotherapy, generates electromagnetic radiation that gives the effect of "deep heat" when absorbed in tissue
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