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the burj khalifa in dubai is the worlds tallest building the structure is 828 m 27165 feet and has more than 160
about 100 years or so ago some critics claimed that rocket propulsion in outer space would never work because in outer
a squid keeps some amount of water in a body cavity ready to expel it in case of danger suppose the mass of the water
a single force acts on a 35 kg particle-like object in such a way that the position of the object as a function of time
a sling shot obeying hookes law is used to launch pebbles vertically into the air you observe that if you pull a pebble
an airplane with a speed ofnbsp286nbspms is climbing upward at an angle ofnbsp42degnbspwith respect to the horizontal
examine the dependence ofnbspresistivity and resistance of a wire on temperaturenbspand how it affects the potential
two long barges are moving in the same direction in still water one with a speed ofnbsp10 kmhnbspand the other with a
a projectile proton with a speed of 1300 ms collides elastically with a target proton initially at rest the two protons
in the figure a block of massnbspmnbsp 14 kg is released from rest on a frictionless incline of anglenbspthetanbsp
mickey a daredevil mouse of mass 00199 kg is attempting to become the worlds first mouse cannonball he is loaded into a
an adult dolphin weighs around 1660 n how fast must he be moving as he leaves the water vertically in order to jump to
a baseball mnbsp 148 g approaches a bat horizontally at a speed of 409 ms 915 mih and is hit straight back at a speed
two particles are moving along thenbspxnbspaxis particle 1 has a massnbspm1nbspand a velocitynbspv1nbsp 38 ms particle
a 20 kg mass and a 30 kg mass are suspended from either end of a 5 meter long bar assume the bar has no mass you want
a spring with spring constantnbspknbsp 170 nm is at the top of a frictionless incline of anglenbspthetanbsp 38deg the
an airplane is flying with a velocity ofnbsp238nbspms at an angle of 300degnbspwith the horizontal as the drawing shows
in the absence of air resistance a projectile is launched from and returns to ground level it follows a trajectory
an object of mass m is thrown vertically upward from the surface of earth where the acceleration due to gravity is ga
two small frogs simultaneously leap straight up from a lily pad frog a leaps with an initial velocity of 0551 ms while
if you throw a ball up with 10ms an a kid runs after the ball with 5 ms at what angle would the kid throw the ball to
a producer has a barn for sheep and lambs the producer wants to use evaporative cooling to cool the barn if the outside
two packing crates of massesnbspm1nbsp 100 kg and m2 670kg are connected by a light string that passes over a
1 does the shape of the balloon affect how far or fast the rocket travels2 does the length of the straw affect how far
two objects with masses of m1 360 kg and m2 580 kg are connected by a light string that passes over a frictionless