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a football punter accelerates a football from rest to a speed of 13 ms during the time in which his toe is in contact
the density of a 30-m long rod can be described by the linear density function x 125 gm 130x gm2 one end of the rod
a skateboarder shoots off a ramp with a velocity of 57 ms directed at an angle of 52deg above the horizontal the end of
a 500-kg boy runs at a speed of 100 ms and jumps onto a cart as shown in the figure the cart is initially at rest if
in the school cafeteria a trouble-making child blows a 100 g spitball through a 300 cm straw the force of her breath
a golfer hits a shot to a green that is elevated 30 m above the point where the ball is struck the ball leaves the club
some nucleus of 74x189 atomic mass 18896191 u undergoes - decay to become 75x189 atomic mass 18895922 u what is the
the middle-a organ pipe was designed to sound at exactly 440 hz when the temperature is 20 ca what is the speed of
a simple harmonic oscillator is constructed from a spring which is connected to a mass of 06 kg the mass-spring system
two identical cars m 1350 kg are traveling at the same speed of 269 ms they are moving in the directions 60 degree
a hollow sphere of radius 030 m with rotational inertia i 0098 kg m2 about a line through its center of mass rolls
a car moves in a flat circular path of radius r on a surface with a coefficient of kinetic friction of 025 and a
a block of mass 10 kg lies to the left of a 5 kg block the 10 kg block is pushed with a force of 30 newtons at an angle
a rocket is launched from the ground with an initial speed of 30 ms at an angle of 40 degrees with respect to the
a student starting from rest slides down a water slide on the way down a kinetic frictional force a nonconservative
two archers shoot arrows in the same direction from the same place with the same initial speeds but at different angles
the walls of an ice chest are made of 200 cm thick styrofoam with a thermal conductivity 00300 wmk the total surface
a heat engine operating at maximum efficiency has an efficiency of 25 the temperature of the cold reservoir is 300 k
a weather balloon contains 120 m3 of hydrogen gas when it is released from a location at which the temperature is
a solid concrete wall 40 m by 24 m and 30 cm thick with a thermal conductivity of 13 wmk separates a basement at 18degc
the electric potential at a position located a distance of 183 mm from a positive point charge of 850times10-9c and 133
suppose an oxygen molecule traveling at a velocity of 480ms bounces back and forth between opposite sides of a cubical
a car starts from rest at a stop sign it accelerates at 40 ms2 for 9 seconds coasts for 6 s and then slows down at a
each plate of a parallel-plate air-filled capacitor has an area of 00020 m2 and the separation of the plates is an
a curve in a highway has radius of curvature 110 m and is banked at 34deg on a day when the road is icy what is the