Physics, 29.04.2021 18:40 cowboo5000pcl655
Home professionals like realtors use ultrasonic measuring tools to quickly measure the size of rooms. (Ultrasound waves are pressure waves like regular sound, but they have an oscillation frequency that is too high for our ears to detect.) These instruments work by sending out a pulse of ultrasonic sound, then measuring the time it takes for this pulse to reflect off a wall and return to the device. If you used such a device on a particularly hot day, would you expect to measure the length of a given room as longer or shorter than on a cool day
Answers: 2
Physics, 21.06.2019 21:50
Adiver in midair has an angular velocity of 6.0 rad/s and a moment of inertia of 1.2 kg¡m2. he then pulls is arms and legs into a tuck position and his angular velocity increases to 12 rad/s. the net external torque acting on the diver is zero. what is his moment of inertia in the tuck position?
Answers: 1
Physics, 22.06.2019 05:40
An ideal polarizer with its transmission axis rotated 30 degrees to the vertical is placed in a beam of unpolarized light of intensity 10w/m^2. after passing through the polarizer, what is the intensity of the beam? a. 8.7 w/m^2 b. 7.5 w/m^2 c. 5.0 w/m^2 d. 10 w/m^2 e. 2.5 w/m^2
Answers: 1
Physics, 22.06.2019 07:00
We put a force of 50n on an object and the acceleration is 100 m/s². what is the mass of the object?
Answers: 1
Physics, 22.06.2019 09:00
In the first law of thermodynamics, triangle e=q-w, what does q stand for
Answers: 1
Home professionals like realtors use ultrasonic measuring tools to quickly measure the size of rooms...
English, 04.12.2020 19:00
Mathematics, 04.12.2020 19:00
Mathematics, 04.12.2020 19:00
Health, 04.12.2020 19:00
Mathematics, 04.12.2020 19:00
History, 04.12.2020 19:00
Biology, 04.12.2020 19:00
Spanish, 04.12.2020 19:00