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an eagle is flying horizontally at 62 mswith a fish in its claws it accidentally drops the fisha how much time does it
a plank of mass m and length l is attached to a wall at one end as as shown the plank rests on a support a distance d
a slingshot sends a projectile straight up it reaches maximum height 175 seconds latera what was the projectiles
a speedboat starts from rest at 201ms2 for 700s at the end of this time the boat continues for an additional600 s with
an object hangs from a spring balance the balance registers 30 n in air 20 n when the object is immersed in water and
a human cannon ball is launched at 250 ms at an angle of 300 degrees from horizontal if the muzzle of the cannon is 600
two trains on separate tracks move toward each other train 1 has a speed of 127 kmh train 2 a speed of 800 kmh train 2
an engine operates between temperatures of 280 k and 700 k at 620 of its maximum efficiencya what is the efficiency of
a 91-kg manrsquos thighbone has a relaxed length of 050 m across-sectional area of 70 x 10ndash4 m2 and a youngrsquos
an aluminum container which has a mass of 0350 kg holds 070 kg of water the water and container are both at 450degc ice
a heat engine working between 1700oc and 4000oc takes in 1639times107 j of heat and delivers 4200times106 j of work per
which one of the following statements is correct concerning the purpose of the surfactant secreted by the alveoli in
in a specific heat experiment 2120 grams of aluminum c9130 jkgk at 1000degc is mixed with 640 g water at 200degca
a copper block with a mass of 400 grams is cooled to 77k by being immersed in liquid nitrogen the block is then placed
a sphere of radius 10 cm is dropped into a glass cylinder filledwith a viscous liquid the mass of the sphere is 120 g
a glass jar submerged half-way is foating in a bathtub suppose that you start putting nickel coins in the jar
two identical cylinders except for their volumes at the same temperature each contain the same kind of gas and the same
a diver of mass 68 kg stands at the end of a uniform diving board of mass 16 kg and length 45 m the board is attached
a rope is pulling a 255 kg mass along a horizontal surface the kinetic coefficient of friction between the mass and the
the drawing shows four point charges the value of q is31 muc and the distance d is 089 m find the total potential at
a a carnot engine operates between a hot reservoir at 3550 k and a cold reservoir at 2650 k if it absorbs 5100 j of
a man stands at one end of a 200 kg uniform board what is the mass of the man if the center of the mass of the
a 2000-kg car moving with a speed of 20 ms collides with andsticks to a 1500kg car at rest at a stop sign show that
a 2000 kg car starts at rest at the bottom of a hill the road is flat at an angle of 522 with the horizontal
a wire carrying 8 a of current is bent into a right angle the j lenght 04m and i 3m the wire is completely sourrounded