Physics, 19.05.2021 03:30 noahslambeenie359
The time it will take for an echo to reach your ears if you yell toward a mountain 82 m away on a day when the air temperature is 0 deg C is
(Speed of sound in air is 331 m/s )
Question 13 options:
0.248 s
0.496 s
4.04 s
8.08 s
Answers: 1
Physics, 21.06.2019 22:30
The of a machine determines its "usefulness." a. input force b. output force c. mechanical advantage
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Physics, 22.06.2019 11:00
A0.580-kg rock is tied to the end of a string and is swung in a circle with a radius of 0.500 meters. the velocity of the rock is 4.50 m/s. what is the centripetal force acting on the rock? 15.5 n 5.22 n 69.8 n 23.5 n
Answers: 3
Physics, 22.06.2019 15:30
At 20โc, the hole in an aluminum ring is 2.800 cm in diameter. you need to slip this ring over a steel shaft that has a room-temperature diameter of 2.804 cm . 1. to what common temperature should the ring and the shaft be heated so that the ring will just fit onto the shaft? coefficients of linear thermal expansion of steel and aluminum are 12ร10โ6 kโ1 and23ร10โ6 kโ1 respectively.
Answers: 1
Physics, 22.06.2019 17:30
Four objects each with charge +2.0ร10โ7c are located at the corners of a square whose sides are 2.0 m long. part a what quantities can be determined using this information? check all that apply. the electric force on a charged object placed at the center of the square. the mass of each object. the total electric potential energy of the system consisting of the four charged objects. part b find the electric force on a charged object placed at the center of the square.
Answers: 1
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