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Q1. A man makes three consecutive displacements :(1) from O to A, (2)from A to B and (3) back to O. The magnitude of OA is 29.70 meters and of AB 47.24 m. If theta= 38.2°, find out the magnitude of the third displacement. Reply in units of m.
Q2. A whale comes to the surface to breathe and then dives at an angle of 20 degree below the horizontal.If the whale continues in a directly line for 196 m, how deep is it?
How far has it travelled horizontally?
What is wave number
A gasoline engine absorbs 2,600 J of heat and performs 1,000 J of mechanical work in each cycle. Find the total of heat expelled in each cycle.
How much time takes to release net radiant energy from body
A cube of ice is taken from the freezer at -8.0°C and placed in a 97 g aluminium calorimeter filled with 286 g of water at room temperature of 20°C. The final situation is observed to be all water at 19°C. What was the mass of the ice cube.
A skier, weighing 453 n, is skiing down a slope that has an incline of 29 degrees above the horizontal. Compute the acceleration of the skier (coefficient of kinetic friction between the skis and snow is 0.21)
A uniform plank of length 4.50 m and weight 275 N rests horizontally on two supports, with 1.1 m of the plank hanging over the right support. To what distance x can a person who weighs 456 N walk on the overhanging part of the plank before it just be..
What magnetic field strength produced by Helmholtz coils
What is a vertical velocity of the ball
A 0.390 kg iron horseshoe that is initially at 745 °C is dropped into a bucket containing 24 kg of water at 46 °C. What is the final equilibrium temperature? Overlook any heat transfer to or from the surroundings.
A 270 m wide river flows due east at a uniform speed of 2.30 m/s. A boat with the speed of 8.4 m/s relative to water leaves the south bank pointed in a direction 38o west of north. What is (a) magnitude and (b) direction of the boat's velocity rel..
If the contact time with the sidewalk is 1800s, what is the magnitude of an average force exerted on the superball by the sidewalk.
Calculate P necessary to just start opening the 2 m wide gate.
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