Explain the conditions in which a person can or can’t hear an echo. Which of the following materials would be the least efficient in soundproofing a room: clay tile, plaster, or perforated acoustic ceiling material? Be sure to use your knowledge of the coefficient of absorption in your explanation. Compare and contrast infrasonic and ultrasonic vibrations. Describe the responses of the human ear to sound waves coming from the right side, left side, or in phase.
Answers: 3
Physics, 22.06.2019 09:00
Sobre transformações cíclicas, são feitas algumas afirmações, determine quais estão corretas. i – a variação de energia interna em uma transformação cíclica é nula; ii – o trabalho, em uma transformação cíclica, é sempre positivo; iii – ao completar um ciclo, o gás tem a mesma temperatura com a qual começou a transformação; iv – uma transformação cíclica é, obrigatoriamente, composta de transformações conhecidas, como adiabática, isocórica, etc: a) i e iii b) i e ii c) ii e iii d) i e iv e) iii e iv
Answers: 1
Physics, 22.06.2019 22:00
Agirl throws a ball. if the ball's acceleration is 12 m/sec/sec and its mass is 0.5 kg, how much force did the girl apply to the ball?
Answers: 1
Physics, 22.06.2019 23:00
As seen in a us weather map, the h (or high) and l (or low) symbols indicate regions where surface air pressures are high or low, respectively, compared to surrounding areas. an h is plotted where the air pressure is highest and an l is plotted where the air pressure is lowest. proceeding outward and away from the center of a high pressure system, the air pressure "
Answers: 1
Explain the conditions in which a person can or can’t hear an echo. Which of the following materials...
History, 15.05.2021 01:00
English, 15.05.2021 01:00
English, 15.05.2021 01:00
Mathematics, 15.05.2021 01:00
Mathematics, 15.05.2021 01:00
History, 15.05.2021 01:00
Mathematics, 15.05.2021 01:00
Mathematics, 15.05.2021 01:00
Social Studies, 15.05.2021 01:00
Mathematics, 15.05.2021 01:00