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A casette player is said to have a signal-to-noise ratio of 58 dB, whereas for a CD player it is 95 dB. What is the ratio of intensities of the signal and the background noise for each device?
A 1.00-kg glider attached to a spring with a force constant 16.0 N/m oscillates on a frictionless, horizontal air track. Find the period of the glider's motion
A long, straight wire runs along the y-axis. The wire carries a current in the positive y-direction that is changing as a function of time according to i = 8 A + (0.2 A/s)t. A loop of wire is placed in the xy-plane near the y-axis. The loop has di..
A 0.800mm -diameter ball bearing has 2.50×109 excess electrons, What is the ball bearing's potential
A copper-constantan thermocouple generates a voltage of 5.03 10-3 volts when the temperature of the hot junction is 121.0° C, what is the temperature of the hot junction
A baseball (m = 148 g) approaches a bat horizontally at a speed of 41.5 m/s (93 mi/h) and is hit straight back at a speed of 45.9 m/s (103 mi/h).
sample of an ideal gas is taken through the cyclic process abca at point a, T = 385 K. How many moles of gas are in the sample, What is the net energy added to the gas during the cycle
A rectangular block of copper has sides of length 10 cm, 20 cm and 40 cm. what is the maximum current the block can carry
The outside mirror on the passenger side of a car is convex and has a focal length of -6.9 m. find the magnification of the mirror
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 distant galaxy is simultaneously rotating and receding from the earth. As drawing shows, the galactic center is receding from the earth at a relative speed of uG = 1.8 x 10^6 m/s.
On a spacecraft, two engines fire for a time of 598 s. One gives the craft an acceleration in the x direction of ax = 4.92 m/s^2, while the other produces an acceleration in the y direction of ay = 7.60 m/s2. At the end of the firing period, the c..
q1. a certain metal with atomic mass 2.6 times 10-25kg has an interatomic bond with length 1.7 times 10-10 m and
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