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A source emits a sound uniformly in all directions. a radial line is drawn from this source. on this line, determine the positions of the two points, 1.00m apart, such that the intensity level at one point is 2.00 dB greater than the intensity level at the other.
a 2.1-m-long vertical pole extends from the bottom of a swimming pool to a point 50.0 cm above the water. What is the length in meters of the shadow of the pole on the level bottom of the pool
When a 5.5 cm long pencil is arranged perpendicular to a convex mirror's optical axis at a distance of 29 cm from the mirror, its image is 2.8 cm tall.
Pendulum A is a physical pendulum made from a thin, rigid, and uniform rod whose length is d.
A pipe open only at one end has a fundamental frequency of 256 Hz. A second pipe, initiallyidentical to the first pipe, is shortened by cutting off a portionof the open end.
compare and contrast the processes of fusion and fission. describe the challenges in harnessing fusion technology for
Consider the circuit shown with C1=5 microfarads C2=3 microfarads, and V0=10V. The switch S is originally closed downward so that the capacitor C2 is fully charged by the battery V0. a. find the charge C2 b. The switch is then moved to the upper posi..
A sample of ethyl alcohol (C2H5OH) has a density of 806 kg/m3 and a volume of 1.73 x 10-3 m3. find the number of molecules in the sample
A freezer is used to freeze 2.0 L of water completely into ice. The water and the freezer remain at a constant temperature of T = 0 C, Determine the change in the entropy of the freezer
Two 60 ohm resistor are connected in parallel. This parallel arrangement is connected in series with a 30 ohm resistor. what is voltage drop across the parallel portion of the circuit
A hawk flies in a horizontal arc of radius 11.7 m at a constant speed 4.70 m/s. Find its centripetal acceleration.
A "swing" ride at a carnival consists of chairs that are swung in a circle by L = 14.2 m cables attached at an angle of ? = 62.7° to a vertical rotating pole. Calculate the tension in the cable attached to the chair
A 4.98-kg pendulum bob, at a height of 0.720 m above the floor, is released and swings down to the ground, Find how high up the incline the block will slide
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