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A storage tank has a diameter of 80 ft, a height of 25 feet, andcontains oil to a height of 15 ft. The suction pumps, whichcan handle 15, 000 bbl/d are started, but the safety valves areclogged and a vacuum is drawn in the tank. The roof is flatand rated to withstand 1.0 oz/sq in. before collapsing. Thebarometric pressure is 30 in Hg. How long will it take the tank to collapse? What is the total force on the roof atcollapse? How would more oil in the tank have affected thecollapse time?
A steel washer is suspended inside an empty shipping crate from a light string attached to the top of the crate, What is the coefficient of kinetic friction between the ramp and the crate
A glass rod rubbed with silk acquires a charge of +1.0×10-9 C. How many electrons have been transferred to the silk
A parallel-plate capacitor has fixed charges +Q and -Q. The separation of the plates is then doubled. (a) By what factor does the energy stored in the electric field change? (b) How much work must be done in doubling the plate separation from d to..
An inductor has an inductance of 0.069 H. The voltage across this inductor is 56 V, What is the current in the inductor
A series AC circuit contains a resistor, an inductor of 240 mH, a capacitor of 4.80 µF, and a source with ?Vmax = 240 V operating at 50.0 Hz. Calculate the capacitive reactance
a monkey pulls a box of bananas with mass 6.2 kg on a surface with a constant speed of 0.50 m/s. how much is the normal force on the box
An energetic father stands at the summit of a conical hill as he spins his 22 child around on a 5.3 cart with a 2.2m-long rope. The sides of the hill are inclined at 25 degrees. He keeps the rope parallel to the ground, and friction is negligible.
What were the initial charges on the spheres? Since one is negative and you cannot tell which is positive or negative, there are two solutions.
A ten pound car wheel has a moment of inertia of 0.38 kg m2. What is the wheel's rotational kinetic energy
In the Bohr model, the electron in H has a circular orbit. For an isolated atom, the only force on the electron is the strictly radial electrical force. Does this violates the uncertainty principle
The pilot of an airplane notes that the compass indicates a heading due west. The airplane's speed relative to the air is 200 km/h. find the velocity of the airplane relative to the ground
Object A, which has been charged to + 29.2 nC, is at the origin. Object B, which has been charged to - 28.9 nC, is at ( x,y ) = ( 0.0;{rm cm},; 1.50 cm ).What is the y-component of force (vec{F}_{rm A ; on ; B})_{rm y} on B due to A.
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