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Give three examples each of mechanical weathering and chemical weathering. What is frost wedging? How do plants and animals contribute to weathering? What is permafrost? What causes sinkholes?
A block of mass m = 15.5 kg rests on an inclined plane with a coefficient of static friction of ?s = 0.13 between the block and the plane. What is the force of gravity along the plane
A fisherman is reeling in afish. In 9.0 s he winds 3.5 m of fishing line onto a reel whoseradius is 2.3 cm (assumed to be constant as an approximation). Determine the angular speed of the reel
A hockey stick delivers an impulse of 4.0{\rm kg \cdot m/s} causing the puck to move off in the opposite direction with the same speed. what is the mass of the puck
Two tugboats pull a disabled supertanker. Each tug exerts aconstant force of 1.7×106 N, one at an angle 18.0^\circ west of north, What is the total work done by the twotugboats on the supertanker
Two ice skaters are gliding together along the ice, both moving at a constant velocity (sliding without exerting a force). The first skater (the one in the back), with mass M1 = 59 kg, pushes the second skater (the one in front), with mass M2 = 70..
an empty rubber balloon has a mass of 0.0115 kg. the balloon is filled with helium at a density of 0.181 kgm3. at this
a blow-dryer and a vacuum cleaner each operate with a voltage of 120 v. the current rating of the blow-dryer is 10 a
A 27.5 Amp current flows in a long straight wire. Obtain the strength of the resulting magnetic field at a distance of 51.3 centimeter from the wire
When responding to sound, the human eardrum vibates about its equilibrium position. Supposed an eardrum is vibrating with an amplitude of the 6.3*10^7 m and a maximum speed of 2.0*10^-3 m/s.
Given an oildroplet with a mass of 7.59e-7 kg and a density of 952 kg/m^3 that spreads out to form a circle with a radius of 42.2 cm on the water surface, what is the approximate diameter of an oil molecule
A platform with a total weight of 2900lbf is raised by a power screw at a rate of 20 in/s. How much power is exerted on the platform? Do the power screws require precisely, more, or less than that amount?
A ray of light is incident from the air onto the surface of a diamond (n=2.42) at a 30 degree angle to the normal, calculate the speed of light in the diamond
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