- The average human lung expands by about 0.51 L during each breath. Part A If this expansion occurs against an external pressure of 0.90 bar, how much work (in J) is done during the expansion? Express your answer in joules to two significant figures. Work=square J
- 2. Susan measured her height as1.42 m using a measuring tape marked in centimetres. a) Write Susan's height an: measured value measurement uncertainty.(2)
- What happens to the gravitational potential energy of an object as it gets further away from the earth? ¿Qué sucede con la energia potencial gravitacional de un objeto a medida que se aleja de la Tierra? There is not enough information to answer this question / No hay suficiente información para responder a esta pregunta. It decreases / disminuye It increases / Incrementa It stays the same / sigue igual
- 2. Susanimassand her height as 1. 42 m using a messuring tape marked in centimetres. a) Write Susan's height as.measured value i meas rement uncertainty. (2) (b) What is the sange of possible values of her ectual height? (2)
- A sinusoidal wave is traveling on a string with speed 29.4cm/s. The displacement of the particles of the string at x=9.8cm is found to vary with time according to the equation y=(3.6cm)sin[1.1-(3.3s^-1)t] The linear density of the string is 4.4g/cm What are (a) the frequency and (b) the wavelength of the wave?If the wave equation is of the form y(x,t)=y_(m)sin(kx-omega t) what are (c) y_(m),(d)k , and (e) w, and (f) the correct choice of sign in front of omega ?(B) What is the tension in the string?
