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Two comets, each of mass 6500 kg and traveling 87 m/s in opposite directions, collide head-on and come to rest. How much energy is produced in this collision?
A 61 kg speed skater with the velocity of 16 m/s comes into a curve of 18 m radius. How much friction should be exerted between skates and ice to negotiate the curve.
What is the maximum bandwidth of the amplifier
A 5.00 gram bullet has a velocity of 300 m/s. It strikes a block of wood and penetrates to a distance of 2.00 cm. The average force of the block of wood on the bullet is
q1. a hula hoop of radius 1.0m is in a uniform electric field with magnitude 1.4 x 102 nc. its normal is parallel to
As a person walks, the femur (upper leg bone) slides in a socket in the hip, Find the frictional force on the bone in the hip joint
The front end of an automobile has been designed so that upon impact it progressively crumples by as much as .70m. What is the magnitude of the deceleration
In a certain region, the earth's magnetic field has a magnitude of 5.4 × 10-5 T and is directed north at an angle of 49° below the horizontal. Determine the bullet's electric charge
A thin, 80.0 g disk with a diameter of 6.00 cm rotates about an axis through its center with 0.300 J of kinetic energy
Find the change in momentum of a 1140kg car that increases its speed from 4.5 m/s to 18.0 m/s in a time of 19s while travelin in the same direction
A polar bear starts at the North Pole. It travels 1.0 km south, then 1.0 km east, then 1.0 km north, What was the bear's average speed
q1. a 1000 kg car travelling at a speed of 20 ms skids to a halt on wet concrete where fk 0.50. how long is the cars
A projectile is projected from the origin with a velocity of 30.0 m/s at an angle of 45 degrees above the horizontal. What is the range of the projectile
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