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Question:
A man in search of his dog drives first 10 mi northeast, then 20 mi straight south, and finally 3 mi in a direction 30° north of west. What are the magnitude and direction of his resultant displacement?
A molecule of DNA (deoxyribonucleic acid) is 2.28 µm long. The ends of the molecule become singly ionized: negative on one end, positive on the other. Determine the effective spring constant of the molecule
The negative pion is an unstable particle with an average lifetime of 2.1 x 10-8 s, Find what distance, as measured in the laboratory, does the pion travel during its average lifetime
A fire truck connects their hose (radius r1 = 5 cm) to a fire hydrant. The underground water lines have a radius of r2 = 15 cm, How high above the end of the hose will the water reach
The Sun is approximately a sphere of radius 6.963 105 km, at a mean distance a = 1.496 108 km from the Earth. calculate its surface temperature
Two skaters each of mass 50 kg approach each other along prallel paths separated by 3 m. describe quantitativley the motion of the skaters after they have become connected by the pole
A system consists of 4.0 kg of water at 85 degrees Celsius 35 J of work is done on the system by stirring with a paddle wheel, What is the change in internal energy of the system
A ship is traveling east at 36.0 km/hr. A small boat is also traveling east at 4.05 m/s. What is the whale's velocity relative to the ship's inertial frame
A car is traveling at a speed of 38.0 m/s on an interstate highway where the speed limit is 75.0 mi/hr. Is the driver exceeding the speed limit
A certain storm cloud has a potential difference of 2.00*108 V relative to a tree. If, during alightning storm, 55.0 C of charge istransferred through this potential difference and 1.00% of the energy is absorbed by the tree, how much water (sap i..
The light bulb used in a slide projector draws a power of 480 watts when operating on 120 volts. What is the bulb’s resistance? What is the current which is passing through the bulb?
You want to support a sheet of fireproof paper horizontally, using only a vertical upward beam of light spread uniformly over the sheet. If the paper is black and hence absorbs all the light that hits it, find what must be the intensity of the light..
light shines through a single slit whose width is 5.5 times 10-4 m. a diffraction pattern is formed on a flat screen
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