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A 55.1 kg ice skater is moving at4.10 m/s when she grabs the loose end of a rope, the opposite end of which is tied to a pole. She thenmoves in a circle of radius 0.800 maround the pole.
a) Determine the force exerted by the horizontal rope on her arms.b) What is the ratio of this force to her weight?
The coefficient of linear expansion os steel is 0.000012/C. A section of a railroad track consists of 5.0 km in length. By what length would this rail change
a soldering iron uses an electric current in a wire to heat the tip. a transformer with 100 turns on the secondary coil
you are designing a process to store pressurized argon gas a monatomic gas. you start with 3 moles of argon at a
A gun shoots bullets that leave the muzzle with a speed of 205m/s. If a bullet is to hit a target 151m away at the level of the muzzle, the gun must be aimed at a point above target.
A certain LCD projector contains a single thin lens. An object 29.5 mm high is to be projected so that its upright image fills a screen 2.52 m high. Find the focal length of the projection lens
to take off from the ground an airplane must reach a sufficiently high speed. the velocity required for the takeoff the
The density of a 3.61 m long rod can be described by the linear density function lambda(x) = 103 g/m + 10.3x g/m^2. determine the center-of-mass coordinate
Transverse waves travel with a speed of 18 m/s in a string under tension of 5 N. What tension is required for a wave speed of 27 m/s in the same string.
what is the center of gravity? how can you find it in various objects? how dooes it effect the equilibrium of an
The four heating elements on an electric stove are wired inparallel so that any combination of them can be on at the sametime. When an element is on, it behaves as a6.80 Ω resistor. When all of the heatingelements are on, what is the equivalent re..
A 4.40-g lead bullet at 32.0°C is fired at a speed of 230 m/s into a large block of ice at 0°C, What quantity of ice melts
If John Glenn weighed 640 N on the Earth's surface, i) how much would be having weighed if his Mercury spacecraft had (hypothetically) remained at twice the distance from the center of the earth? ii) Why is it said that an astronaut is never truly..
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