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During a storm, a tree limb breaks off and comes to rest across a barbed wire fence at a point that is not in the middle between two fence posts. The limb exerts a downward force of 151 N on the wire. The left section of the wire makes an angle of 14 degrees relative to the horizontal and sustains a tension of 447 N. Find the magnitude and direction of the tension that the right section of the wire sustains.
A quarter-pound hamburger with all the fixings has a mass 210g . The food energy of the hamburger is 2.4MJ. What is the energy equivalent of the mass of the hamburger
Estimate the phase difference between the sounds received by your ears when you are facing 90° away from the direction of the source
A string is wrapped around a disk of mass 2.1 kg (its density is not necessarily uniform). what is the speed of the center of mass of the disk
Ultraviolet light is shone on a particular metal and the stopping potential is measured at the same time. What is the work function of the metal
Uranium 238 has a half life of 1.41 x 10^17 sec if the earth is 5.5 billion years old what fraction of the original uranium 238 that was on earth when it formed is left. hydrogen emits red light at a wavelength of 656 nm if M = 2 what value of n do..
Speedboat A negotiates a curve whose radius is 198 m. Speedboat B negotiates a curve whose radius is 290 m. Each boat experiences the same centripetal acceleration. What is the ratio vA/vB of the speeds of boats.
120 g ball moving to the right at 4.1m/sec catches up and collides with a 450 g ball that is moving to the right at 1.2 m/sec what is the speed of both balls after the collision?
Illustrate what is the magnitude of the change in momentum of the ball while in contact with the bat if the ball leaves with a velocity of (a) 18 m/s, vertically downward, and (b) 18 m/s, horizontally back toward the pitcher?
A 68-{\rm kg} person rides in a 35-{\rm kg} cart moving at 11{\rm m/s} at the top of a hill that is in the shape of an arc of a circle with a radius of 45{\rm m}. What is the apparent weight of the person as the cart passes over the top of the hill
Squaw Valley ski area in California claims that its lifts can move 48300 people per hour. estimate the maximum total power needed
A 78.05kg fisherman is sitting in his 33.25kg fishing boat along with his 13.49kg tackle box. What is the recoil speed of the fisherman and his boat
what average power was developed. A curve of radius 70 m is banked for a design speed of 110 km/h. If the coefficient of static friction is 0.30 (wet pavement), at what range of speeds can a car safely make the curve.
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