A student performs a lab using an ultrasonic probe to measure the distance to a wall located some distance away. If the air temperature is 25°C and the sound signal
returns 3.0 s after it was sent, how far away is the wall? Show all work using GRASS
and round your answer to the correct number of significant digits.

Which transition by an electron will release the greatest amount of energy? oa ob oc od

The bar of prob. 5/82 is repeated here. the ends of the 0.4-m bar remain in contact with their re- spective support surfaces. end b has a velocity of 0.5 m/s and an acceleration of 0.3 m/s2 in the di- rections shown. determine the angular accelera- tion of the bar and the acceleration of end a.

Two students, each riding bicycles, start from the same apartment building and ride to the same building on campus, but each takes a different route. the first student rides 1100 m due east and then turns due north and travels another 1430 m before arriving at the destination. the second student heads due north for 1930 m and then turns and heads directly toward the destination.at the turning point, how far is the second student from the destination?