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a fire fighter is trying to shoot water straight to the window located at the second floor of a house 6 m above the
once the tiles were laid mahogany floor trim was installed around the perimeter of the floor the trim cost 1185 per
a box weighing 800n is dragged across a level floor at a constant speed under the influence of a 60n applied forcewhat
a sustained force of 44 n moves a model airplane 10 m along its runway to provide the required speed for takeofffind
a 0340 kg particle moves in an xy plane according to xt -1500 200t - 400t3 and yet 2500 700t - 900t2 with x and y
the airplane can take off when its airspeed speed of the air flowing over the wing is equal to 65 knots what is the
using graphical method find the vector sum of a force of 20 n directed 60 degrees east of north and a force of 60 n
a single stock futures contract on a nondividend-paying stock with current price 150 has a maturity of one year if the
when a 0111 kg mass is suspended at rest from a certain spring the spring stretches 390 cm find the instantaneous
a 110-microf capacitor and a 500-microf capacitor are charged by being connected across separate 550-v batteriesa
if the electric field inside a capacitor exceeds the dielectric strength of the dielectric between its plates the
a river flows with a uniform velocity v a person in a motorboat travels 121km upstream at which time she passes a log
a ball on the end of a string is whirled around in a horizontal circle of radius 0300m the plane of the circle is 119m
an aerialist on a high platform holds onto a trapeze attached to a support by an 98-m cord see the drawing just before
two hikers are climbing up a mountain and one throws a first aid kit up to another at an initial velocity of 11 ms and
a child on a sled total mass 41 kg slides down a hill inclined at an angle theta 22deg at a constant speed 35 msa how
a water balloon is launched at a speed of 23 ms and an angle of 36 degrees above the horizontalthe water balloon hits a
cohort effects are a threat to validity in which design longitudinal or
find the gravitational acceleration if a spaceship at a distance equal to double of earths radius from the centre of
find a journal article of a longitudinal study and outline the abstract how could you change this study to a
herersquos a statement of the results of an experiment ldquoas the sample got older from 50 to 70 years lung volume
propose a longitudinal study and a cross-sectional design being sure to identify the independent and dependent
give an example of an abab single-subject design what is an advantage to using abab over aba or ab
what is the difference between a nonequivalent control group design and a pretest posttest control group
rank these designs in order of level of internal validity from lowest to highestpre-experimental designtrue