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A skier is pulled up a slope at a constant velocity by a tow bar. The slope is inclined at 23.0° with respect to the horizontal. The force applied to the skier by the tow bar is parallel to the slope. The skier's mass is 55.3 kg, and the coefficient of kinetic friction between the skis and the snow is 0.110. Calculate the magnitude of the force that the tow bar exerts on the skier.
At a constant speed of 55 km/h , an automobile travels 600m along a straight highway that is inclined 5.0 degrees to the horizontal. What is the cars vertical velocity magnitude
A hollow sphere of inner radius 7.4 cm and outer radius 8.4 cm floats half-submerged in a liquid of density 800 kg/m3. Calculate the density of the material of which the sphere is made
A 13 kg child on a playground swing moveswith a speed of 2.9 m/s when the 6.0 mlong swing is at its lowest point. What is the angle that the swingmakes with the vertical when the child is at the highest point?
The mass of Pluto was not known until 1978 when a moon of Pluto was finally discovered. How did the discovery of this moon help
A molecule of DNA (deoxyribonucleic acid) is 2.26 µm long. The ends of the molecule become singly ionized: Determine the effective spring constant of the molecule
By what method will a positively charged rod produce a negative charge on a conducting sphere that is placed on an insulating surface?
A 120cm3 box contains helium at a pressure of 1.50atm and a temperature of 80.0?C. What is the final pressure in each box
A small moon of a giant planet has an orbital period of 1.41 days and an orbital radius of 4.10 x 105 kilometer. From these data, compute the mass of the planet
q1. a hockey stick is swung with the average angular acceleration of 1.5 rads2. what is the angular velocity of the
The electric field between two identical but opposite charges, at seventh-fifteenth the distance from the negative charge to the positive charge, is 3.50 x 105 N/C, Evaluate what is the magnitude of each charge
Ships A and B leave port together. For the next two hours, ship Atravels at 20 mph in a direction20° west of north while the ship Btravels 25° east of north at25 mph.
A ship leaves the island of Guam and sails a distance 265km at an angle 37.0 north of west.In which direction must it now head therefore that its resultant displacement will be 120km directly east of Guam? (Express your answer as an angle measured so..
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