Physics, 21.03.2020 21:24 genyjoannerubiera
An ambulance driving 50.0 m/s emits a sound wave with a wavelength of 80.0 centimeters. As it drives toward a hospital, which of the following is the only possible frequency heard by the medical staff who are standing at the entrance? Speed of sound is 343 m/s.
Answers: 1
Physics, 22.06.2019 11:50
The scalar triple product computes the magnitude m of the moment of a force vector f about a specified line. it is m = (r Γ f) Β· n, where r is the position vector from the line to the point of application of the force and n is a unit vector in the direction of the line. use matlab to compute the magnitude m for the case where f = [12, β5, 4] n, r = [β3, 5, 2] m, and n = [6, 5, β7].
Answers: 3
Physics, 22.06.2019 11:50
The mass of the sun is 1.99Γ1030kg and its distance to the earth is 1.50Γ1011m. what is the gravitational force of the sun on the earth?
Answers: 3
Physics, 22.06.2019 12:50
Air is contained in a variable-load piston-cylinder device equipped with a paddle wheel. initially, air is at 400 kpa and 17Β°c. the paddle wheel is now turned by an external electric motor until 75 kj/kg of work has been transferred to air. during this process, heat is transferred to maintain a constant air temperature while allowing the gas volume to triple. calculate the required amount of heat transfer in kj/kg.
Answers: 2
Physics, 22.06.2019 13:30
The period of a pendulum varies directly as the square root of the length of the pendulum and inversely as the square root of the acceleration due to gravity. find the period when the length is 144 cm and the acceleration due to gravity is 980 cm per second squared, if the period is 7pi seconds when the length is 289 cm and the acceleration due to gravity is 980 cm per second squared.
Answers: 2
An ambulance driving 50.0 m/s emits a sound wave with a wavelength of 80.0 centimeters. As it drives...
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