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a tennis ball is thrown out a window 28m above the ground at an initial velocity of 150 ms and 20 degrees below the
a 10-c charge is 15 m from a second charge and the force betweenthem is 10 nwhat is the magnitude of the second
two point charges initially 20 cm apart experience a 10-nforce if they are moved to a new separation of 80 cm what is
a steel cable with total length 20m and mass 100kg is connected to two polesnbsp the tension in the cable is 2000n and
assume that while pecking on a tree the woodpeckers head comes to a stop from an initial velocity of 07 ms over a
a seagull flies at a speed of 10ms directly into the wind knowing that it takes the bird 25 min to travel 8km relative
a 1000 kg car is pushed up a 175 degree incline for a distance of300 m at a constant speed assume the applied force is
a covex lens of focal length 10 cm placed 40 cm in front of aconcave lens of focal length 25 cma small object is placed
a block of mass m is attached to a spring ofspring constant k and is moving with constant speed in a horizontalcircle
the tires on a mew car have a diameter of 2ft and are warranted for60 000 miles determine the angle in radians through
a descent vehicle landing on mars has a vertical velocity towardthe surface of mars of 55ms at the same time it has a
a system undergoes a two-step process in the first step the internal energy of the system increases by 228 j when 166 j
a spring has a spring stiffness constant k of 440 nm how much must the spring be stretched to store 25 j of potential
earths gravitational field is 783nkg at the altitude of the space shuttle what is the size of the force of attraction
water is pumped into a storage tank from a welldelivering 230 gallons of waterin 350 seconds through a pipeof 100 in2
an astronaut is being tested in a centrifuge the centrifuge has a radius of 876 m and in starting rotates according to
a carnot engine has a power output of 200 kw the engine operates between two reservoirs at 20degc and 450degca how much
a fisherman notices that his boat is moving up and down periodically owing to waves on the surface of the water it
class 2 lasers including many laser pointers produce visible light with no greater than 1 mw total power theyre
a person stands on a bathroom scale in a motionless elevator when the elevator begins to move the scale briefly reads
a 140 bucket is lowered vertically by a rope in which there is 193 of tension at a given instant what is the
a 0140- baseball traveling 330 strikes the catchers mitt which in bringing the ball to rest recoils backward 150 what
a projectile is fired with an initial speed of 609 at an angle of 374 above the horizontal on a long flat firing range
a tiger leaps horizontally from a 54 -high rock with a speed of 40 how far from the base of the rock will she
a solid block is suspended from a spring scale if the reading on the scale when the block is completely immersed in