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A pendulum is constructed by attaching a small metal ball to one end of a 1.25 m long string that hangs from the ceiling. the ball is released when it is raised high enough for the string to make an angle of 30.0 degrees with the vertical. how fast is it moving at the bottom of its swing?
a man stands on the roof of a building of height 16.1m and throws a rock with a velocity of magnitude 26.8 m/s, Calculate the maximum height above the roof reached by the rock
Starting from rest, a boulder rolls down a hill with constant acceleration and travels 4.00 during the first second. How fast is it moving at the end of the first second
Suppose an ideal monatomic gas at an initial temperature of 475 K is compressed from 3.20 L to 2.15 L while its pressure remains constant at 1.01 105 Pa. Find the work done on the gas.
A potter's wheel is a uniform solid disk of diameter 0.72m and a mass of 60kg. what minimum total friction force must the potter supply to the disk if her hands are acting at the edge of the disk
Charge B exerts a repulsive force (directly away from B) on charge A of 4.5N. Find the magnitude of the net force on charge A
A series circuit consists of a 15-%uF057 resistor, a 35-mH inductor, and a 25-%uF06DF capacitor. If the frequency is 100 Hz the power factor is
The frequency of an electromagnetic wave is f = 3.75 x 1014 Hz, What is the index of refraction n of the material
A basketball player grabbing a rebound jumps 70.80 cm perpendicularly. How much total time (ascent and descent) does the player spend (a) in the top 11.2 cm of this jump and (b) in the bottom 11.20 cm? Do your results describe why such players see..
after completing the calculations below sketch the ph curve for the titration of 25.0 ml of 0.200m solution of a weak
A 30 g dart is shot straight up at 9.7m/s . At the same instant, a 24g ball of cork is dropped from 2.0m above the dart. What is the direction of the cork ball immediately after it is hit by the dart
A radar unit sends out 0.05 microsecond pulses of microwaves whose wavelength is 25 mm. What is the frequency of these microwaves
question1a golf ball with an initial angle of 30deg lands exactly 214 m down range on a level course.a neglect air
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