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Determine the design angle f ∅(0° ? ∅ ?90°) between struts AB and AC so that the 400-lb horizontal force has a component of 600 lb which acts up to the left, in the same direction as from B towards A. Take ∅30°
When you insert a sheet of wood (κ = 2.00) between the plates of a capacitor, the capacitance becomes24.0 nF. What capacitance will it have if youinsert a block of glass (κ = 6.00) instead?
The concrete sections of a certain superhighway are designed to have a length of 27 meter. The sections are poured and cured at 10.0°C. Find what minimum spacing should the engineer leave
A package of supplies is to be dropped from an airplane so that it hits the ground at a designated spot near some campers, What should the angle be between the horizontal and the pilot's line of sight to the drop point
A river flows from south to north at 5.30 km/h. On this river, a boat is heading east to west perpendicular to the current at 7.90 km/h, determine how fast is this boat traveling
An object is located 13.5 cm in front of a convex mirror, the image being 7.45 cm behind the mirror. A second object, twice as tall as the first one, is placed in front of the mirror, but at a different location.
Two diffraction gratings, A and B, are located at the similar distance from the observation screens. Light with the same wavelength λ is utilized for each. The separation among adjacent principal maxima for grating A is 2.7cm, and for grating B it is..
A 100 object is taken to a height of 250 above the Earth's surface. What is the object's mass at this height? What is the object's weight at this height
an a.c. generator which produces an rms voltage of 120 v at 60 hz is connected to a 57 microf capacitor. there are no
In a serious accident, a nuclear power plant%u2019s reactor vessel cracks, and all of the cooling water drains out. How long will the melting take
Charged particles pass through a velocity selector with electric and magnetic fields at right angles to each other, as shown in the figure. If the electric field has a magnitude of 490 N/C and the magnetic field has a magnitude of 0.14 T, what speed ..
Mercury is approximately a sphere of radius 2.43 x 106 m. What is its circumference in kilometers and What is its surface area in square kilometers
A ladder base is 6m away from a house, and the fully extended ladder is 10m long when it leans against the house
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