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1. Two kilograms of 40-C air is contained in a 4-m3 volume. Calculate the pressure, density, specific volume, and specific weight. 2. The temperature outside a house is -20-C and inside it is 20-C. What is the ratio of the density of the outside air to the density of the inside air? Would inflltration, which results from cracks around the windows, doors, and siding, etc., occur even with no wind causing a pressure difference?
A kid fires water horizontally from a squirt gun held 1.6 above the ground. It hits other kid 2.4 away squares in the back, at a point 0.85 above the ground. What was the initial speed of the water.
A resonant circuit in a radio receiver is tuned to a certain station when the inductor has a value of 0.311 mH and the capacitor has a value of 16.4 pF. Calculate the frequency of the radio station.?
The owner of a van installs a rear-window lens that has a focal length of -0.340 m. When the owner looks out through the lens at an object located directly behind the van, How far from the van is the object actually located
The output of a generator is given by v(t)=a sin(wt), where a=304V. Find the rms current in the circuit when this generator is connected to a 138 ohms resistor
A block of mass m is initially at rest at the top of an inclined plane with a height = 6 m which makes and angle of ? = 25 degrees with respect to the horizontal. What is the speed of the block as it leaves the ramp
A horizontal pipe contains water at a pressure of 150 kPa flowing with a speed of 2.0 m/s. The pipe narrows to one-half its original diameter. What is the pressure of the water
An electric motor operates a pump that irrigates a farmer’s crop by pumping 10 000 L of water a vertical distance of 8.0 m into a field each hour. The motor has an operating resistance of 22.0\Omega and is connected across a 110-V source.
If 7 V is applied to the above circuit and the voltage across the first lamp is 1 V, what is the voltage across the second lamp
a string is 33.5 cm long and has a mass per unit length of 5.70 10-4 kgm. what tension must be applied to the string
For the arrangement shown in the figure below, an object is placed 0.37 m in front of the converging lens, which has a focal length of 0.17 m. where is the final image formed
A neutron star is an extremely dense, rapidly spinning object that results from the collapse of a star at the end of its life. What is its rotational inertia
What is the kinetic energy of a ball of mass 16.1 kg at the apex (highest point) of its trajectory, if it is thrown with an initial speed of 45 mph and an initial angle of 42.8o with respect to the horizontal
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