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Four identical charges (+2uC each) are brought from infinity and fixed to a straight line. The charges are located .4 m apart. Determine the electric potential energy of this group.
A dentist uses a mirror to examine a tooth that is 0.75 cm in front of the mirror. The image of the tooth is formed 11.0 cm behind the mirror. Determine the mirror's radius of curvature
a car sits in an entrance ramp to a freeway waiting for a break in the traffic. the driver sees a small gap between a
A series RL circuit with L = 3.00 H and a series RC circuit with C = 3.00 μF have equal time constants. If the two circuits contain the similar resistance R.
A football punter accelerates a football from rest to a speed of 8 m/s during the time in which his toe is in contact with the ball (about 0.26 s). what average force does the punter exert on the ball
A ball is thrown directly downward with an initial speed of 7.55 m/s, from a height of 30.2 m. After what time interval does it strike the ground
When a guitar string is sounded along with a 441-Hz tuning fork, a beat frequency of 4.00 Hz is heard. When the same string is sounded along with a 437-Hz tuning fork, beat frequency is 8.00 Hz. What is the frequency of the string.
Suppose a hockey puck slides down a frictionless ramp with an acceleration of 4.00 m/s2. If the ramp has a length of 5.90 m, how long does it take the puck to reach the bottom
A particle of mass 0.350 kg is attached to the 100-cm mark of a meterstick of mass 0.125 kg. Calculate the angular momentum of the system when the stick is pivoted about an axis perpendicular to the table through the 50.0-cm mark
the inner and outer surfaces of a cell membrane carry a negative and positive charge respectively. because of these
the ball leaves the students hand with a speed of 12.0 when the hand is 2.20 above the ground. how long is the ball in
An amusement park roller coaster starts out on a level track 50.0 m long and then goes down a 50.0-meter incline at an angle of 30° to the vertical. It then goes up a 20.0-meter ramp with an incline of 20° to the horizontal.
The chemical atomic mass of hydrogen, with the two stable isotopes 1H and 2H (deuterium), is 1.00798. Use m(H1) = 1.007825 u, determine the natural abundance of 2H isotope
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