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, 22.06.2019 11:50, brendaesme
Question 1 (5 pts): what is the maximum distance for which you can you resolve the two individual headlights of an on-coming truck as two separate lights rather than one if the headlights are separated by 2.00 m and your eye has a diameter of 1.00 centimeter? assume a wavelength of 500 nm.
Answers: 2
Physics, 22.06.2019 16:00, chamyaparker
What is the freezing point of radiator fluid that is 50% antifreeze by mass? kf for water is 1.86 ∘c/m.
Answers: 3
Physics, 22.06.2019 17:00, griffinkiley22
Two manned satellites approaching one another at a relative speed of 0.550 m/s intend to dock. the first has a mass of 2.50 ✕ 103 kg, and the second a mass of 7.50 ✕ 103 kg. assume that the positive direction is directed from the second satellite towards the first satellite. (a) calculate the final velocity after docking, in the frame of reference in which the first satellite was originally at rest.(b) what is the loss of kinetic energy in this inelastic collision? (c) repeat both parts, in the frame of reference in which the second satellite was originally at rest. final velocity(d) loss of kinetic energy = ?
Answers: 2
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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