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A bob of mass m is suspended from a string of length L, forming a pendulum. The period of this pendulum is3.5 s. If the pendulum bob is replacedwith one of mass 1/3m and the length of the pendulum is increasedto 2L, what is the period of oscillation?
Chinook salmon are able to move through water especially fast by jumping out of the water periodically. This behavior is called porpoising. Suppose a salmon swimming in still water jumps out of the water with velocity 6.59 m/s at 41.7° above the h..
A jewel smith wishing to buff a finished piece of jewelry attaches a buffing disk to his drill. What is the period of rotation of the disk now
A ball rotates in a circle of radius 20.0 cm, making one complete revolution every 2.00 s. What are (a) the speed of the ball, (b) the frequency of motion in hertz, and (c) the angular speed of the ball?
A pitcher pitches the ball (m = 150 g) at 40.3 m/s. The batter makes contact with the ball for 0.001 s, Find the net average force on the ball
A hockey player hits a punk so that it comes to rest in 9s after sliding 30 m on the ice. Determine (a) the initial velocity of the punk, (b) the coefficient of friction between the punk and the ice.
A partially evacuated airtight container has a tight-fitting lid of surface area 75.4 cm2 and negligible mass. If the force required to remove the lid is 384 N and the atmospheric pressure is 1.00 × 105 Pa, what is the air pressure in the containe..
A parallel-plate air capacitor is made from two plates 0.070 square, spaced 9.3 apart. What must the potential difference between plates be to produce an energy density of.
A 0.80-kg book moves verticallyupward a distance of 17 m, andthen vertically downward 17 m,returning to its initial position. How much work is done by gravity during the upward motion of the book?
A diver springs upward from a board that is 4.50 m above the water. At the instant she contacts the water her speed is 12.5 m/s and herbody makes an angle of 84.9 ° with respect to the horizontal surface of the water. Determine her initial velocit..
A small device based on the confinement of a proton in a 1 dimensional box is found to have a ground (i.e. n = 1) level energy of 16.9 keV. Determine the width of the box
If the frequency of blue light is 6 x 10^14 cycles/second andits wavelength is 5 x 10^-7 m, find the speed of light by using dimensional analysis
a box is sliding up an incline that makes an angle of 20 degrees with respect to the horizontal. the coefficient of
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