Speeds greater than five times the speed of sound (Mach 5) are often referred to as hypersonic. Fast military jets have their top speed listed as a Mach number with Mach 1 being the speed of sound, and Mach 2 is twice the speed of sound.Īn aircraft that is travelling at supersonic speed is exceeding the speed of sound (Mach 1). If an aircraft is travelling at the speed of sound at sea-level then its speed will be 661 knots (760 miles per hour) or if it is travelling at the speed of sound at 30,000 feet then its speed will be 589 knots (677 miles per hour).Īircraft speed is usually measured in knots which is a unit of speed equal to one nautical mile per hour. C.The speed of sound (Mach 1) varies with altitude and temperature. It is because the ΔH of the reaction is negative. If an aircraft is travelling at the speed of sound at sea-level then its speed will be 661. It is not because the ΔH of the reaction is negative. The speed of sound (Mach 1) varies with altitude and temperature. Is this reaction spontaneous? 2ZnS + 3O2 + C → 2SO2 + 2Zn + CO2 A. The ΔH of the reaction below is -575.13 kJ. (show your work) a) What absolute value expression can be used to represent this situation? b) Use the expression to determine the temperature range the enclosure The temperature of an enclosure for a pet snake should be about 27☌, give or take 3☌. (a) How far below the top of the well is the surface of the water? The speed of sound in air (at the ambient temperature) is 336 m/s. The sound of the splash is heard 2.40 s after the rock is released from rest. If the sound of the impact is heard 101.4s after the torpedo was fired, what is the speed of sound inĪs dry air moves upward it expands and in doing so cools at a rate of 1 degrees Celsius for each 100 m rise up to about 12 km If the ground temperature is 20 degrees Celsius find an expression for the temperature T as a function of the height H the answerĪ rock is dropped from rest into a well. It depends on the temperature because the ?H of the reaction is negative and the ?S isĪ torpedo fired from a submerged submarine is propelled through the water with a speed of 20.00 m/s and explodes upon impact with a target 2000.0m away. The speed of sound depends on several variables, but the only independent variable we need to calculate the speed of sound is the temperature of the air. Mars also has an atmosphere composed of mostly carbon dioxide. Scientists and engineers have created a mathematical model of the atmosphere to help them account for the changing effects of temperature with altitude. At removal from a sea level, dependence of speed of sound on altitude becomes evident which is caused by heterogeneity of the atmosphere. Besides, we see that sound is adiabatic not only when g 0 but when g 0 but z 0. On Earth, the atmosphere is composed of mostly diatomic nitrogen and oxygen, and the temperature depends on the altitude in a rather complex way. (3.2) shows that ideal value of sound speed in atmosphere obviously depends on altitude. It is not because the ?H of the reaction is negative. The speed of sound varies from planet to planet. Is this reaction spontaneous? 2ZnS + 3O2 + C ? 2SO2 + 2Zn + CO2 A. The ?H of the reaction below is -575.13 kJ. Write an expression for the time the arrow is in the air until it returns to launch height in

Find the maximum height h reached by the arrow, in meters. This MATLAB function implements the mathematical representation of the International Standard Atmosphere values for ambient temperature, pressure, density, and speed of sound for the input geopotential altitude. 1) What is the difference between the speed of light and the speed of sound? 3.0 x 10^8 - 3.4 x 10^2 2) How many timesĪn archer fires an arrow straight up into the air with a speed vo = 14 m/s. The speed of sound is approximately 3.4 x 10^2 meters per second. c ( x R x T / M) c the speed of sound in an ideal gas R the molar gas constant (set at approximately 8.313,5 J) Adiabatic index (1.4 for air) T absolute temperature M the gas molar mass (dry air is.

The speed of light is approximately 3.0 x 10^8 meters per second. If you want to know the speed of sound in a gas such as air, use this unique formula. How deep is the hole?Īt what temperature, in degrees Celsius, is the speed of sound in air 341 m/s? The speed of sound is 343 m/s in air, and the sound of the stone striking the bottom is heard 3.24 s after the stone is dropped. How long after the jet is directly overhead. A spelunker (cave explorer) drops a stone from rest into a hole. A jet flying at an altitude of 8.50 km has a speed of Mach 2.00, where the speed of sound is v 340.00 m/s.

Speed of sound at altitude