Physics, 12.10.2020 02:01 starfox5454
An intrepid treasure-salvage group has discovered a steel box, containing gold doubloons and other valuables, resting in 80 ft of seawater. They estimate the weight of the box and treasure (in air) at 7000 lbf. Their plan is to attach the box to a sturdy balloon, inflated with air to 3 atm pressure. The empty balloon weighs 250 lbf. The box is 2 ft wide, 5 ft long, and 18 in high. What is the proper diameter of the balloon to ensure an upward lift force on the box that is 20% more than required
Answers: 1
Physics, 22.06.2019 03:50
The intensity of a polarized electromagnetic wave is 12 w/m^2. part a) what will be the intensity after passing through a polarizing filter whose axis makes the angle θ=0â with the plane of polarization? part b) what will be the intensity after passing through a polarizing filter whose axis makes the angle θ=30â with the plane of polarization? part c) what will be the intensity after passing through a polarizing filter whose axis makes the angle θ=45â with the plane of polarization? part d) what will be the intensity after passing through a polarizing filter whose axis makes the angle θ=60â with the plane of polarization? part e) what will be the intensity after passing through a polarizing filter whose axis makes the angle θ=90â with the plane of polarization?
Answers: 1
Physics, 22.06.2019 11:50
Two resistors r1 and r2 may be connected either in series or parallel across an ideal battery with emf Îľ. we desire the rate of energy dissipation of the parallel combination to be 8.75 times that of the series combination. if r1 = 105 Ď, what are the (a) smaller and (b) larger of the two values of r2 that result in that dissipation rate?
Answers: 2
Physics, 22.06.2019 17:30
The items in the following list are all units of matter. which is the smallest unit that retains the properties of the matter? a.) atom b.) compound c.) electron d.) element
Answers: 1
An intrepid treasure-salvage group has discovered a steel box, containing gold doubloons and other v...
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