Physics, 24.06.2020 17:01 uchapman6286
An automobile being reads 8.0 seconds and is 550 feet from the starting point when the stopwatch reads 10.0 seconds A. What was the average velocity of the automobile during the interval from t - 8.0 seconds to t 10.0 seconds? B. What was the average velocity of the automobile during the interval from t-0s to t- 10.0 s? (Assume that the stopwatch read t = 0 and started at the same time as the auto.) C. If the automobile averages 100 ft/s from t = 10.0 s to t = 20.0 s, what distance does it travel during this interval? D. The automobile has a special speedometer calibrated in feet/s instead of in miles/hour. At t -8s the speedometer reads 65 ft/s; and at t - 10 s it reads 80 ft/s. What is the average acceleration during this interval?
Answers: 2
Physics, 22.06.2019 12:30, lmolder1329
Consider a 1000 w iron whose base plate is made of 0.5 cm thick aluminum alloy 2024-t6 (ρ = 2770 kg/m3 and cp = 875 j/kg°c). the base plate has a surface area of 0.03 m2. initially, the iron is in thermal equilibrium with the ambient air at 22°c. assuming 90% of the heat generated in the resistance wires is transferred to the plate, determine the minimum time needed for the plate temperature to reach 200°c.
Answers: 1
Physics, 22.06.2019 22:30, quan1541
Use the drop-down menus to answer each question. which line represents the movement of a cart with a constant acceleration? a which line represents the movement of a cart with a constant velocity? c which lines represents a cart with no velocity or acceleration? b
Answers: 1
Physics, 23.06.2019 02:30, Braxtonw875
Atrain is traveling at 30.0 m/s relative to the ground in still air. the frequency of the note emitted by the train whistle is 262 hz. the speed of sound in air should be taken as 344 m/s. what frequency (f approach) is heard by a passenger on a train moving at a speed of 18.0 m/s relative to the ground in a direction opposite to the first train and approaching it? what frequency (f recede) is heard by a passenger on a train moving at a speed of 18.0 m/s relative to the ground in a direction opposite to the first train and receding from it?
Answers: 1
An automobile being reads 8.0 seconds and is 550 feet from the starting point when the stopwatch rea...
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