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1. A reflecting, spherical Christmas tree ornament has a diameter of 20cm. A child looks at the ornament from a distance of 30cm._______cm
2. Assume you were told that a couple where the girl's mass was two thirds that of the boy. The boy has a velocity of v = +0.54 m/s. What would be the girls velocity in this case? _______m/s
a student exchanges the stock headphones b1 89 db for her mp3 player for a new set that is louder b2 94.5db. if the
What is the efficiency of a cyclical heat engine in which 65.0 kJ of heat transfer occurs to the environment for every 95.0 kJ of heat transfer into the engine
a 25.0 kg propeller may be considered a 4.5m long rod spun about its center. What final angular velocity does the propeller have if a torque of 1100 Nm is applied for 1.2 sec
A 50 kg motionless student stands adorably on a frozen friction surface. What is the velocity (vector) of the adorable student after catching the shot
A typical scuba tank has a volume V of 10 liters. When fully charged, it contains compressed air at a pressure of 200 bars, or 2.0 x 10^7 Pa. What is the uncompressed volume of the air
on a distant planet golf is just as popular as it is on earth. a golfer tees off and drives the ball 4.80 times as far
An ac generator has 80 rectangular loops on its armature. Each loop is 12 cm long and 8 cm wide. find the maximum output voltage of this generator
a skateboarder shoots off a ramp with a velocity of 6.8 ms directed at an angle of 59deg above the horizontal. the end
A balance scale has unequal arms. The scale is balanced with a m = 1.50-kg block on the left pan and a M = 1.79 kg block on the right pan, what mass on the left pan will balance the scale
At what speed do a bicycle and its rider, with a combined mass of 98 kg, have the same momentum as a 1350 kg car traveling at 4 m/s?
An internal explosion breaks an object, initially at rest,into two pieces, one of which has 1.5 times the mass of the other. how much kinetic energydid each piece acquire
It is believed that the universe began with a big bang about 17 billion years ago. If the speed of light is 2.99792 × 10^8, what is the maximum possible radius of the observable universe
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