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A man pulls a toboggan for a distance of 40.0 meter along the snow with a rope directed 20.0 degree above the snow. The tension in the rope is 90.0 Newton.
(a) Find how much work is done on the toboggan by the tension force?
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(b) Find how much work is done if the same tension is directed parallel to the snow?
A highway is to be built between two towns, one of which lies 37.0 km south and 49.0 km west of the other. What is the shortest length of highway that can be built between the two towns
The technique known as potassium-argon dating is used to date old lava flows and thus any fossilized skeletons found in them, What is the age of a piece of solidified lava with a 40Ar/40K ratio of 0.34
q1. the wire is made up of atoms with valence 2 and molecular mass 80 gmole where u 1.5605 times 10-27 kg is the mass
An infinitely long wire is formed as in the diagram on your assignment. It is formed so that it has a circular portion of R = 50cm and the straight portion is located at a distance r from the center of the circular portion. Determine r (in cm) suc..
A force given by F(x) = 5x3 (in N/m3) acts on a 1-kg mass moving on a frictionless surface. The mass moves from x = 3.87 m to x = 6.09 m. How much work is done by the force
What is the weight of the staging. A highway curve with radius 800 is to be banked so that a car traveling 56.0 will not skid sideways even in the absence of friction. At what angle must the curve be banked.
question a group of swimmers is resting in the sun on an off-shore raft. they estimate that 3.44 m separate a trough
The nucleus 11-4 Be undergoes B- decay with a half-life of 13.8 sec. The atomic mass of 11-4 Be is 11.021660 u. What is the total kinetic energy of the decay products
A particular engine has a power output of 4.27 kW and an efficiency of 22.2%. The engine expels 7236 J of energy as heat in each cycle. Find the energy absorbed in each cycle
A 85-kg person sits on a 3.7-kg chair. Each leg of the chair makes contact with the floor in a circle that is 1.4 cm in diameter
An insulated piston-cylinder device contains 3 liters of saturated liquid water at a pressure of 150 kPa. A current of 10 Amps flows for 45 minutes through an electrical resistor that is placed in the water, while the water is stirred by a paddle-..
A hydrogen atom, initially at rest, emits an ultraviolet photon with a wavelength of \lambda = 122nm. What is the recoil speed of the atom after emitting the photon
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