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Carbon dioxide gas is heated as it flows steadily through a 2.5-cm-diameter pipe. At the inlet, the pressure is 2 bar, the temperature is 300 K, and the velocity is 100 m /s. At the exit, the pressure and velocity are 0.9413 bar and 390 m /s, respectively. The gas can be treated as an ideal gas with constant specific heat cp = 0.94 kJ/kg · K. Neglecting potential energy effects, determine the rate of heat transfer to the carbon dioxide, in kW.
(a) What must the initial speed of the ball be if the pitch is to arrive at the batter exactly 1.00 m above the ground? (b) How long does it take the ball to reach the batter? (c) If there were no gravity, at what angle would the pitch have to be ..
A 2.30 N force pushes it to the left, and a 0.800 N force pushes it to the right. (a) Taking right to be positive, what is the net force acting on it? (b) What is its acceleration?
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.
Find the distance point P on the tip of the blade has traveled in 3 sec. Also, find the magnitude of the acceleration of point P when t = 3 sec.
Estimate the value of resistances needed to make a variable timer for intermittent windshield wipers: one wipe every 15?s, 8?s, 4?s, 2?s, 1?s, Estimate the mininum value of the resistance
Two freight cars, each with a mass of 2.9 x 10^5 kg, collide and stick together. One was initially moving at 2.80 m/s and the other was at rest. What is the final speed.
compute the force of the Earth's gravity on an electron and evaluate it with the force exerted on the electron by an electric field of magnitude 12500-V/m (a relatively small field). The mass and charge of an electron are given on the inside back ..
An initially stationary 2.0 kg object accelerates horizontally and uniformly to a speed of 20 m/s in 1.9 s. (a) In that 1.9 s interval, how much work is completed on the object by the force accelerating it.
A student has built a 20-cm-long pinhole camera for a science fair project. She wants to photograph the Washington Monument, How far should she stand from the Washington Monument
Does current through a power supply increase when parallel bulbs are added? For example, if you have a circuit with one bulb and measure the current through the bulb to be 100 mA, what is the current through the power source when you add another b..
An infinitely long line of charge has a linear charge density of 8.00×10-12 C/m. A proton is at distance 16-cm from the line and is moving directly toward the line with speed 1200 m/s.
Determine the direction of the net electrostatic force on charge q3 (angle with respect to the positive x-axis).
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