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Q1. Ideal gas helium flows through a well-insulated nozzle at stable state. The temperature and velocity at the inlet are 90 °C and 30 m/s, in that order. At the exit, the temperature is -18 °C and the pressure is 3.10 bar. The mass flow rate is 1.25 kg/s. using the ideal gas model, and neglecting potential energy effects, determine the exit area. Take cp, He to be 5.193 kJ/kg·K. Answer in m².
Q2. Two boxes, m1 = 1.0 kg with a coefficient of kinetic friction of 0.10, and m2 = 2.0kg with a coefficient of 0.20, are placed on a plane inclined at 0 = 30o.
(a) What acceleration does each box experience?
(b) If a taut string is connected to the boxes, with m2 at first farther down the slope, what is the acceleration of each box?
(c) If the initial configuration is reversed with m1 starting lower with a taut string, what is the acceleration of each box?
What is the greatest amount through which the wavelength of an incident photon could change when it undergoes Compton scattering from an atom or molecule with a 19 u mass.
Find tension in the back muscle and the compressional force
Suppose a ping-pong ball and a bowling ball are rolling toward you with the same momentum, and you exert the same average force in stopping each of them.
Perform the following unit conversions for parts (A) in the table below (B) through. Show your work using a step-wise approach.
What is the largest wavelength that will give constructive interference at an observation point 171 from one source and 295 from the other source.
What is magnitude of the speed of the boat
Use this technique to find formula for the intensity of a sound, in terms of sound level and the reference intensity. There will be a quantity involved in the calculations. When you enter your answer, leave off the unit.
For the circuit shown below, C = 0.113 µF and = 103 V. The switch throw is rotated to contact b after having been at contact for the long time, and 3.47s later the potential difference across the capacitor is equal to 1/2. What is the value of R.
From the shape of total energy vs. time plot, what can you conclude about the conservation of mechanical energy in your mass and spring system.
What is tension in each string
How far would trampoline stretch if the performer stands still on it while taking a bow.
Mike pulls a sled across level snow with force of 235 N along a rope that is 35.5° above the horizontal. If the sled moved the distance of 75.0 m, how much work did Mike do.
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