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a ball is thrown straight upward and returns to the throwers hand after 270 s in the air a second ballis thrown at an
the power supplied to a typical black-and-white television set is88 w when the set is connected to 120va how much
a student presses a book between his hands as the drawingindicates the forces that he exerts on the front and back
a bowling ball mass 72 kg radius 010 m and a billiard ball mass 042 kg radius 0028 m may each be treated asuniform
true or false and why1 velocity of an object is zero at the same instant the acceleration is zero2 if an object is not
what is the magnitude and direction of the force on an electrontraveling 85 x 105 ms in the x direction caused by
a proton is accelerated through 50 mv and then enters a uniformmagnetic field of 025 t if the velocity of the proton is
when a light bulb is connected across the terminals of abattery the battery delivers 200 w of power to the bulb
three point charges areplaced on the x-axis charge 1 is located at x a and has a chargeof 5q charge 2 is at x 3a and
two thin conductingconcentric cylinders have infinite length the inner cylinder has aradius a and a line charge density
a block slides down a frictionless plane having an inclination of 170degif the block starts from rest at the top and
two strong magnets on opposite sides of a small table are shownthe long-range attractive force between the magnets
a small block with mass m1 rests on a frictionless horizontal tabletop a distance r from a hole in the center of the
you are designing a centrifuge to spin at a rate of 15850 revmina calculate the maximum centripetal acceleration that a
a parallel-plate capacitor has an area of 600 cm2 and the plates are separatedby 200 mm with air between them the
one cylinder in the diesel engine of a truck has an initialvolume of 600 cm3 air is admitted to the cylinder at 30degc
the drawing shows four insulated wires overlapping one anotherforming a square with 0050-m sides all four wires are
a horizontal wire is hung from the ceiling of a room by twomassless strings the wire has a length of 014m and a mass of
a 256hz sound wave in 20degc air propagates into the water of a swimming pool what are the water-to-air ratios of the
how long must a 060-mm-diameter copper wire be to carrya 050 rm a current when connectedto the terminals of a 15 rm v
a centrifuge is a device in which a small container of material is rotated at high speed on a circular path such a
the driver of a car going at 68milesh suddenly sees a truckahead at 60 m moving slowly at 23 milesh in the
a spacecraft is on a journey to the moon at what point asmeasured from the center of the earth does the gravitational
what is the net force of a 20 n force and an 60 n forceacting on an object for each of the following conditionsa the
a person drives a car around a circular cloverleaf with aradius of 59 m at a uniform speed of 10 msa what is the