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The velocity of a boat with respect to the water is 4.0 m/s at an angle of 30.0 degrees NORTH of EAST. The velocity of the water with respect to the ground is 3.0 m/s at an angle of 90.0 degrees NORTH of EAST. What is the velocity of the boat with respect to the ground?
Two people carry a heavy electric motor by placing it on a light board 2.50m long. One person lifts at one end with a force of 440 N , Where along the board is its center of gravity located
A mass of 9.20 kilogram is pulled along a horizontal surface by a constant force of F=84.0 Newton directed 30.0o above the horizontal. find what is the work done only by force
find the electric field at the center of a square produced by four equal 2 muc charges located at its corners. also for
a moving 4.10 kg block collides with a horizontal spring whose spring constant is 260 nm. the block compresses the
A bullet with mass m=9.5 gram and initial velocity v=630 m/s is fired into a block (mass M = 5.4 kilogram) that is hung by two strings. Consider the conservation of linear momentum, determine the velocity of the bullet+ block system right after the ..
Two objects attract each other with a gravitational force of magnitude 9.8 x 10-9 Newton when separated by 19.3 centimeter. determine what is the mass of each
a 0.525 kg ball starts from rest and rolls down a hill with uniform acceleration traveling 200m during the second 10.0
Blood from an animal is located in a bottle 1.79 meter above a 3.20 centimeter long needle of inside diameter 0.360 millimeter from which it flows at a rate of 4.23 cm3/min. Estimate what is the viscosity of this blood
A 3.9 A current is set up in a circuit for 5.9 min by a rechargeable battery with a 9.0 V emf. By how much is the chemical energy of the battery reduced?
an unstable particle called the pion has a mean lifetime of 25 ns in its own rest frame. a beam of pions travels
A 1kg ball is fastened to a string of length 1.5m. It can rotate at an average angular velocity of 10 rad/s. What is its moment inertia about the axis of rotation
Alan the astronomer is earth-bound and observes two quasars moving away from each other along a line that passes through the earth. Find at what speed are the quasars moving apart relative to each other
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