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1. A rigid tank contains air at a pressure of 90 psia and a temperature of 60 °F. By how much will the pressure increase as the temperature is increased to 110 °F?
2. The density of oxygen contained in a tank is 2.0 kg/m3 when the temperature is 25 °C. Determine the gage pressure of the gas if the atmospheric pressure is 97 kPa.
Romeo is chucking pebbles gently up to Juliet's window, and he wants the pebbles to hit the window with only a horizontal component of velocity. he is standing at the edge of a rose garden 4.5 m below her window and 5 m from the base of the wall. How..
A Nichrome wire is used as a heating element in a toaster. From the moment the toaster is first turned on to the moment the wire reaches it maximum temperature, What is the temperature change in the wire
A 4.0-m-long iron bar of uniform cross section is held perpendicular to the wall by a wire from the end of the bar to the wall as shown below. what is the magnitude of the vertical component of force produced by the wall
Explain the difference between a photon of red light and one of violet light in terms of energy, frequency, and wavelength. What scientist won the Nobel Prize for explaining the photoelectric effect? Name another theory for which that scientist is..
Consider a string with a length of 56.5 cm tied at both end (like on a stringed instrument). If the frequency of the first harmonic on the string is 267 Hz, determine the speed of the wave in the string. Post your answer in m/s and with 3 signific..
The threshold intensity for a human eye to sense the presence of light is 50 photons falling on the retina within a period of 0.1 s. Estimate how far away the star can be away
A 1.40-kg block slides with a speed of 0.950 m/s on a frictionless horizontal surface until it encounters a spring with a force constant of 734 N/m. The block comes to rest after compressing the spring 4.15 cm.
Two adjacent sources each emit a frequency of 800 Hz in air where the velocity of sound is 340 m/s. How much farther back would source 1 have to be moved thus that an observer in front of the sources hears no sound?
What is the rate of work output of a press that delivers 120 strokes per minute, each stroke providing a force of 8000 N throughout a distance of 18 mm? If the press efficiency is 90%, what average torque must be provided by a 1750-rpm driving mo..
A uniform disk of radius 0.469 m and unknown mass is constrained to rotate about a perpendicular axis through its center. Find the mass of the disk
A soccer ball is kicked with a speed of 9.55 at an angle of 55.0 above the horizontal.If the ball lands at the same level from which it was kicked, how long was it in the air
A voltage of 14 V is placed on a capacitor with C = 103 pF (picofarads). How much energy is stored in the capacitor
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