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a 100-kg steel support rod in a building has a length of 20 m at a temperature of 20oc the rod supports a hanging load
a a certain corner of a room is selected as the origin of a rectangular coordinate system if a fly is crawling on an
decide the electric potential energy for the array of three charges in the drawing relative to its value when the
a brick is thrown upward from the top of a building at an angle of 40deg to the horizontal and with an initial speed of
presume a rocket-propelled motorcycle is fired from rest horizontally across a canyon 110 km wide1 what minimum
a driver in a moving car applies the brakes the car slows to a final speed of 180 ms over a distance of 400 m and a
the best leaper in the animal kingdom is the puma which can jump to a height of 37 m when leaving the ground at an
calculate your average velocity in the following two cases a you walk 683 m at a speed of 174 ms and then run 683 m at
you toss a racquetball directly upward and then catch it at the same height you released it 224 s later suppose air
a parallel-plate capacitor is formed from two 10 cm times 10 cm electrodes spaced 27 mm apart the electric field
the voltage across a membrane forming a cell wall is 787 mv and the membrane is 922 nm thick what is the electric field
the dissimilarity in electric potential among a thunder cloud and the ground is 238108 v electrons move from the ground
when a block slides across a floor what is the direction of the frictional force acting on the block from the floor1-
two stereo speakers mounted 452 m apart on a wall emit identical sound waves you are standing at the opposite wall of
1 what is the instantaneous velocity of a freely falling object 14 s after it is released from a position of rest2 what
the density of air decreases with altitude consider a planet having a layer of atmosphere extending no more than 700 km
identify the action-reaction pairs of forces for the following situationsa you step off a curbb you pat your tutor on
gravity on the moon is only 16 as strong as gravity on the earth what is the weight of a 16 kg object on the moon and
what is the impact speed when a car moving at 100 kmh bumps into the rear of another car traveling in the same
a point of charge of -400 nc is at the origin and a second point of charge of 600 nc is on the x axis at x 0800 m
a magnifier has a magnification of 4x for someone by a normal near-point distance of 25 cm what is the magnification of
you are travelling on a two-lane highway 30 m behind a slow truck you and the truck are initially moving at 20 ms you
lightning occurs when there is a flow of electric charge principally electrons among the ground and a thundercloud the
martin has severe myopia with a far point on only 17 cm he wants to get glasses that hell wear while using his computer
the two vectors a over script right-arrow end scripts and b over script right-arrow end scripts in the figure have