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Physics, 23.06.2019 06:00
The frequency of a tuning fork can be found by the method shown. a long tube open at both ends is submerged in a beaker of water, and the vibrating tuning fork is placed near the top of the tube. the length l of the air column is adjusted by moving the tube vertically. the sound waves generated by the fork are reinforced when the length of the air column corresponds to one of the resonant frequencies of the tube. the smallest value for l for which a peak occurs in sound intensity is 7 cm. l what is the frequency of the tuning fork? the speed of sound in air is 345 m/s. answer in units of hz
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Physics, 23.06.2019 07:30
The electric field inside a battery generates an electric potential difference of 12v. the plates are seperated by a distance of 0.25m. what strength of the electric field?
Answers: 3
Physics, 23.06.2019 11:00
Olympic skier tina maze skis down a steep slope that descends at an angle of 30β below the horizontal. the coefficient of sliding friction between her skis and the snow is 0.10. i found maze's acceleration which is 4.1 m/s^2. but how do you determine maze's speed 4.0 s after starting?
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Physics, 23.06.2019 11:00
Abox that has self-contained cable clamps holds two light switches. a two-wire no. 12 cable with ground feeds the box, and a pair of two-wire no. 12 cables (four conductors) with ground wires leaves the box to feed the light fixtures. the second switch is fed by a no. 12 jumper wire from the first switch. which one of the following box combinations would furnish the minimum allowable volume? a. two 3-inch Γ 2-inch Γ 21β2-inch gangable device boxes b. two 3-inch Γ 2-inch Γ 11β2-inch gangable device boxes c. two 3-inch Γ 2-inch Γ 23β4-inch gangable device boxes d. two 3-inch Γ 2-inch Γ 21β4-inch gangable device boxes
Answers: 2
Define Force
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