Answer:
The ratio of initial to final speed of sound is given as 1.28.
Explanation:
As per the thermodynamic relation of isentropic expansion
Here
- is the pressure at point 1 which is given as 2.2 MPa
- is the temperature at point 1 which is given as 77 °C or 273+77=350K
- is the pressure at point 1 which is given as 0.4 MPa
- is the temperature at point 2 which is to be calculated
- k is the ratio of specific heats given as 1.4
Substituting values in the equation
As speed of sound c is given as
for initial to final values it is given as
As values of k and R is constant so the ratio is given as
Substituting values give
So the ratio of initial to final speed of sound is 1.28.
Answer:
Vy = 26 m/s sin 30 = 13 m/s vertical speed
t = Vy / a = 13 m/s / 9.80 m/s^2 = 1.33 sec time to reach Vy = 0
H = Vy t + 1/2 g t^2
H = 13 m/s * 1.33 sec - 1.33^2 * 9.8 / 2 m = 8.62 m
Answer:
diverging light rays of the bulb are collected by the reflector.
Explanation: