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A 75kg astronaut is holding a 5kg ball while in deepspace. He wants to use the ball to travel backwards towards his ship by throwing the ball foward. He estimates that he can throw the ball with velocity 20m/s. What velocity will he acquire? and how long will it take him if his ship is 20m away?
instructions for ?nding a buried treasure include the following go 304.2 paces at 209? turn to 183? and walk 275 paces
A 1.20 kg ball and a 4.00 kg ball are connected by a 74.0 cm long massless, rigid rod. What is the rotational kinetic energy of the structure
A 9.4-V battery, a 5.08-? resistor, and a 9.9-H inductor are connected in series. After the current in the circuit has reached its maximum value, evaluate the power being supplied by the battery
on turning a corner ,a motorist rushing at 44m/s find a child on road 100m away. he applies the brakes so as to stop the motorcar within 1m of child. calculate the time required to stop.
The electric field in a region of space is oriented along the positive y axis. A circle of radius R is placed in xz-plane. The flux of the electric field by this circle is Φ. The same electric field passing through a second circle of radius 2R parall..
a thin lens of focal length 30.0 cm and is used to form an image that is twice the size of the object. Find the object position
A uniform sphere and a uniform cylinder with the same mass and radius roll at the same velocity side by side on a level surface without slipping. What will be the percentage difference of the heights
A block of mass m1 = 1.75 kg and a block of mass m2 = 5.90 kg are connected by a massless string over a pulley in the shape of a solid disk having radius R = 0.250 m and mass M = 10.0 kg. These blocks are allowed to move on a fixed block-wedge of ..
A certain kind of glass has an index of refraction of1.650for blue light of wavelength430nm and an index of1.615for red light of wavelength690nm. compute the angle between the two beams inside the glass
Consider 10 air molecules in an otherwise empty room. Find the probability that exactly four molecules are in the front third and exactly six in the top half, exactly three molecules are both in the front third and the top half (that is, the same mol..
calculate the work done by a person pulling a 50kg sled, at constant velocity, along the snow at an angle of 50 degrees from vertical for 5m
A large 50-turn circular loop of radius 10cm carries a current 4A. At the center of the loop is a small 20-turn coil of radius 0.5cm carrying current 1A. Find the torque exerted by the large coil on the small coil
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