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Compute the porosity for rhombohedral packing of identical spheres.
Answer is 25.96%... but how is this calculated?
a vehicle covers 600m on a compass bearing of 47 degrees,then 500m bearing 128 degrees; Determine the resultant displacement of the vehicle
q1. a 3.55-kg object is thrown vertically upward from the surface of mercury where the acceleration due to gravity is
On a workday the average decibel level of a busy street is 80 dB, with 100 cars passing a given point every minute. If the number of cars is reduced to 45 every minute on a weekend, what is the decibel level of the street.
Over a time interval of 1.92 years, the velocity of a planet orbiting a distant star reverses direction, changing from +19.7 km/s to -19.1 km/s.
A car travels due East with a speed of 33.5 km/h. Rain is falling vertically with respect to the Earth. Find the velocity of the rain with respect to the car
A thick-shelled hollow metal sphere contains in its cavity 2.0 nC of charge. What is the flux emanating from the outer surface
A tennis player receives a shot with the ball (0.060 0 kg) traveling horizontally at 50.5 m/s and returns the shot with the ball traveling horizontally, What is the impulse delivered to the ball by the tennis racquet
Two blocks attached by a string (see figure) slide down a 15° incline. Block 1 has mass m1 = 0.91 kg and block 2 has mass m2 = 0.20 kg. Find the magnitude of the acceleration of the blocks
A diving bell with interior air pressure equal to atmospheric pressure is submerged in Lake Michigan at a depth of 142.1 m. estimate the magnitude of the net force on the viewing port
Use the free electron model to estimate the gap parameter ?0 and the transition temperature Tc for (a) aluminum (1.81 x 10^29 electrons/m3 ) and (b) zinc (1.31 x 10^29 electrons/m3 ).
the motor slows from 80 rad/s to 40rad/s while the turning the drum through an angle of 120 radians. Illustrate what is the magnitude of the angular acceleration of the motor?
An aircraft with a mass of 996 kg accelerates from 0 to 87 m/s in 6.2 seconds, at which time the aircraft launches. What is the kinetic energy of the aircraft when the aircraft launches
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