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A small sphere that carries a charge of 7.25 C is whirled in a circle at the end of an insulating string. The angular speed is 308 rad/s. What average current does this rotating charge represent?
A soap film formed in a loop of wire is, because of its weight, not exactly uniform in thickness, but wedge-shaped in cross section. By how much does the film differ in thickness over the distance
Objective questions based on work, energy, power.
two equal-volume compartments of a box are joined by a thin wall as shown in the figure. the left compartment is filled
Cheetahs, fastest of the great cats, can reach 45 in 2 starting from rest. Assume that they have constant acceleration throughout that time, find their acceleration (in (a) and (b) ) and the distance (in (c) and (d) ) Q2. They travel during that t..
A 1.2 kilogram object moving with a speed of 8m/s collides perpendicularly with wall and emerges with a speed of 6m/s in the opposite direction, find the magnitude of the average force on the object by the wall
Bacteria vary somewhat in size, but a diameter of 2.0 nanometers is not unusual. What would be (a) volume (in cubic centimeters) and (b) surface area (in square millimeters) of such a bacterium, assuming that it is spherical.
A spring of spring constant k = 340 Nm-1 is used to launch a 1.5-kg block along a horizontal surface by compressing the spring by a distance of 18 cm. If the coefficient of sliding friction between the block and the surface is 0.25, how far does the ..
A person's right eye can see objects clearly only if they are between 27cm and 86cm away. What will be the near point with the lens in place
a 7.96 m times 14.42 m swimming pool slopes linearly from 1.42 m depth at one end to a 3.04 m depth at the other. what
Find the focal length of contact lenses that would allow a nearsighted person with a 145 cm far point to focus on the stars at night
a parallel-plate capacitor is connected to a 12.0-v battery. the area on each plate is 16 cm2 and the spacing between
A sled and rider with a combined weight of 59 kg are at rest on the top of a hill 10 m high. What is their total energy at the top of the hill
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