Physics, 13.01.2021 15:20 sheilashair
A whistle emitting a note of 4 kHz is
whirled in a horizontal circle of radius 1 m at a constant speed. If the highest note heard
by a person a large distance away is 4200 Hz, find:
(i) the speed of the whistle
(ii) the lowest note heard by the person,
(iii) the time taken for the whistle to make on complete revolution,
(iv) the time interval between the person hearing the highest and lowest note.
Answers: 3
Physics, 21.06.2019 15:30
If you quadruple the temperature of a black body, by what factor will the total energy radiated per second per square meter increase? 1,024 64 16 4 256 submit answer
Answers: 1
Physics, 22.06.2019 05:50
Sawyer is studying diffraction. he draws a diagram of a plane wave to show how light waves travel. which best describes sawyer’s error? the wave fronts should be perpendicular to the direction in which the waves move. the arrow showing the direction of movement of the waves should be pointing to the left. the arrow showing the direction of movement of the waves should be pointing downward. the wave fronts should be both parallel and perpendicular to the direction in which the waves move.
Answers: 2
Physics, 22.06.2019 18:30
Apiece of metal 75g at 110°c is dropped in a container with 500g at 20°c. the h2o if temperature is 24°c find specific heat capacity of metal
Answers: 3
Physics, 23.06.2019 01:30
The flame produced by the burner of a gas (propane) grill is a pale blue color when enough air mixes with the propane (c3h8) to burn it completely. for every gram of propane that flows through the burner, what volume of air is needed to burn it completely? assume that the temperature of the burner is 195.0°c, the pressure is 1.05 atm, and the mole fraction of o2 in air is 0.210.
Answers: 2
A whistle emitting a note of 4 kHz is
whirled in a horizontal circle of radius 1 m at a constant sp...
English, 29.01.2020 00:46
History, 29.01.2020 00:46
Mathematics, 29.01.2020 00:46
Chemistry, 29.01.2020 00:46
Biology, 29.01.2020 00:46
Mathematics, 29.01.2020 00:46
Mathematics, 29.01.2020 00:46
Mathematics, 29.01.2020 00:46