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A source emits sound uniformly in all directions. There are no reflections of the sound. At a distance of 12 m from the source, the intensity of the sound is 4.5 × 10-3 W/m2. What is the total sound power P emitted by the source?
The speed of a bullet as it travels down the barrel of a rifle toward the opening is given by v = (-5.30 107) t 2 + (3.15 105) t, What is the length of the barrel
You have a ball on a wire that is twirled in a circular orbit with a radius of 3.7 m, What is the speed of the ball in orbit
What is the electric potential energy of the electron as it is at midpoint and at 14cm from 5 charge.
A car with a mass of 800 kg moves up a hill inclined at an angle 15? to the horizontal with a constant acceleration of 2.5 ms?2. Find the force of the engine
Suppose you have a near-point distance of 16 cm. The angular resolution of the eye is determined by diffraction, What is the smallest object your bare eye can resolve
An archer shoots an arrow with a velocity of 30 m/s at an angle of 20 degrees with respect to the horizontal. An assistant standing on the level ground 30 m downrange from the launch point throws an apple straight up with the minimum initial speed ne..
Three long, straight, parallel wires all lie in the yz plane and each carries a current of 20 A in the positive z direction. The two outer wires are each 4.0 cm from the center wire. What is the magnitude of the magnetic force on a 50-cm length of ei..
A violin string of length 35 cm and mass 1.1 g has a frequency of 478 Hz when it is vibrating in its fundamental mode. What is the wavelength of the standing wave on the string
Blood Speed in an Arteriole A typical arteriole has a diameter of 0.030 MM and carries blood at the rate of 5.5 x 10^-6 cm^3/s. What is the speed of the blood in an arteriole
An elementary particle called a pi meson (or pion for short) has an average lifetime of 2.6×10?8s when at rest. Find the average distance traveled by the pion as measured by the same observer
An emf source with a magnitude of = 120 , a resistor with a resistance of = 91.0 , compute the magnitude of the charge on each plate of the capacitor
A wire is formed into a circle having a diameter of 10.3 cm and is placed in a uniform magnetic field of 2.84 mT. Find the maximum torque on the wire
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