Physics, 25.12.2019 02:31 dontcareanyonemo
On a bright winter's day, a student notices an echo as she runs between a high school's playing field and the rear wall of its gym. she decides to estimate how far she stands from the reflective wall. she abruptly whistles and determines that the sound pulse returns to her as an echo 0.431 seconds later (averaging several trials for enhanced reliability). the air is a frigid -10°c. six months later, the student decides to repeat her experiment on a hot summer day, standing at the same exact spot. this time, the echo takes a slightly shorter 0.396 seconds to return to the student. (a) what is the temperature (in °c) of the air on the summer day? oc (b) how far (in m) does the student stand from the reflective walir?
Answers: 3
Physics, 21.06.2019 23:30
Acoil formed by wrapping 80 turns of wire in the shape of a square is positioned in a magnetic field so that the normal to the plane of the coil makes an angle of 28.0° with the direction of the field. when the magnetic field is increased uniformly from 200 µt to 600 µt in 0.400 as, an emf of magnitude 80.0 mv is induced in the coil. what is the total length of the wire?
Answers: 3
Physics, 22.06.2019 01:30
What is the magnitude of the resultant vector round your answer to the nearest tenth
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Physics, 22.06.2019 08:30
What is the primary force that suspension bridges use cables to hold their spans up? a. tension force b. resistance force c. normal force d. elastic force e. applied force
Answers: 3
On a bright winter's day, a student notices an echo as she runs between a high school's playing fiel...
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