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A drinking straw 20 cm long and 3.0 mm in diameter stands vertically in a cup of juice 8.0 cm in diameter. A section of straw 7.0 cm long extends above the juice. A child sucks on the straw, and the level of juice in the glass begins dropping at 0.23 cm/s.
a) By how much does the pressure in the child's mouth differ from atmospheric pressure?
b) What is the greatest height from which the child could drink, assuming this same mouth pressure?
(a) Three point charges, A = 2.2 µC, B = 7.5 µC, and C = -3.9 µC, are located at the corners of an equilateral triangle. Find the magnitude and direction of the electric field at the position of the 2.2 µC charge.
A 3.60 {rm m}-long, 430 {rm kg} steel beam extends horizontally from the point where it has been bolted to the framework of a new building under construction. A 66 {rm kg} construction worker stands at the far end of the beam.
Earth is farthest from the Sun in July and closest to Sun in January. During which Northern Hemisphere season is Earth moving fastest in its orbit.
Pat builds a track for his model car out of wood. The track is 14.00 cm wide, 3.00 m long, Locate the horizontal coordinate of the center of gravity of this track
A uniform ladder 10.0 m long is leaning against a frictionless wall at an angle of 60.0° above the horizontal. find the magnitude of the frictional force exerted on the ladder
Two metal spheres, each weighing 24-kg are placed 0.05 m apart. Compute the magnitude of the gravitational force the two spheres exert on each other.
Two charged, parallel, flat conducting surfaces are spacedd=2.00cm apart, What is the initial speed of the electron if it stops just at the second surface
A playground carousel is free to rotate about its center on frictionless bearings, and air resistance is negligible. What is the person's mass
A penny of mass 3.10 g rests on a small 22.40 g block supported by a spinning disk of radius 11 cm. The coefficients of friction between block and disk are 0.715 (static) and 0.64 (kinetic) while those for the penny and block are 0.564 (static) an..
A car of mass M = 1100 kg traveling at 45 km/hour enters a banked turn covered with ice. The road is banked at an angle theta, and there is no friction between the road and the car's tires.
A 50.0 ball of clay traveling east at 8.00 collides and sticks together with a 40.0 ball of clay traveling north at 8.00. Illustrate what is the speed of the resulting ball of clay?
A battery charger is connected to a dead battery and delivers a current of 3.7 A for 2.1 hours, How much energy is delivered to the battery
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