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(a) What is the minimum cross-sectional area required of a vertical steel cable from which is suspended a 270 kg chandelier? Assume a safety factor of 7.0. Utensile strenth of steel is 5.0 x 10^8.
(b) If the cable is 7.5 m long how much does it elongate?
A 1055-kg van, stopped at a traffic light, is hit directly in the rear by a 790-kg car traveling with a velocity of +2.40 m/s. What is the final velocity of each vehicle
If a dielectric material with ? = 3.80 is inserted so that it fills the volume between the plates (with the capacitor still connected to the battery), how much additional charge will flow from the battery onto the positive plate
The ball is free from rest with the line taut and horizontal (θ = 90.0°). At what angle θ (measured from the vertical) would the fishline break.
Like all stars, our sun converts mass into energy which radiates (spherically) in all directions. Calculate the rate at which the sun is losing mass
An elevator moves downward in a tall building at a constant speed of 3.80 m/s. Estimate the highest floor from which the bolt can fall
A bullet is fired through a board 10.0 cm thick in such a way that the bullet's line of motion is perpendicular to the face of the board. The initial speed of the bullet is 400 m/s and it emerges from the other side of the board with a speed of 30..
A uniformly charged, thin ring has radius 10.0 cm and total charge + 15.0 nC. An electron is placed on the ring's axis a distance 30.0 cm from the center of the ring and is constraned to stay on the axis of the ring. The electron is then released ..
When a high-power laser is used in the Earth's atmosphere, At this maximum intensity, what power can be delivered in a cylindrical beam of diameter 6.56 mm
A baseball pitcher can throw a ball with a speed of 40m/s . He is in the back of a pickup truck that is driving away from you. What is the speed of the truck
A 1500 {rm kg} car skids to the halt on a wet road where mu_k = 0.50. How fast was the car travelling if it leaves 66-{rm m}-long skid marks.
A converging lens with a focal length of 5.00 cm is placed 20.00 cm in front of a concave mirror whose focal length is also 5.00cm. Calculate the position of the final image formed by the system
A person is pushing a uniformly-loaded 24.15 kg wheelbarrow along a plank that makes an angle ? = 38.0° with the horizontal. What is the total force the person must apply
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