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A 121-kg horizontal platform is a uniform disk of radius 1.63 m and can rotate about the vertical axis through its center. A 65.9-kg person stands on the platform at a distance of 1.01 m from the center and a 26.7-kg dog sits on the platform near the person, 1.37 m from the center. Find the moment of inertia of this system, consisting of the platform and its population, with respect to the axis.
Suppose you wish to fabricate a uniform wire from 1.30 g of copper. The wire is to have a resistance of R = 0.420 ?and all the copper is to be used. What must be the length of this wire
A jetliner is moving at a speed of 187 m/s. The vertical component of the plane's velocity is 44.5 m/s. find out the magnitude of the horizontal component of the plane's velocity.
A diver makes 2.5 revolutions on the way from a 9.0-m-high platform to the water. find the diver's average angular velocity during a dive
The tip of a tuning fork goes through 480 complete vibrations in a time of 0.570s. Find the angular frequency. Find the period of the motion.
A power plant that uses the temperature gradient of the ocean has been proposed. The system is to operate between 21°C (surface temperature) and 6°C (water temperature at a depth of about 1 km).
An equilateral triangle 10.0 m on a side has a 1.00 kg-mass at one corner, a 2.00- kg mass at another corner, and a 3.00- kg mass at the third corner. Find the magnitude of the net force acting on the 1.00-kg mass
The rms speed of a sample gas is increased by 2 %, What is the percent change in the temperature of the gas
A 250 kg weather rocket is loaded with 100kg of fuel and fired straight up. It accelerates upward at 32m/s2 for 34 s, then runs out of fuel. overlook any air resistance effects.
An apartment has a living room whose dimensions are 2.8 m x 5.1 m x 5.6 m. what is the mass (in grams) of the air
question1a 1.35 kg block is attached to a spring with spring constant 15.0 nm. though the block is sitting at rest a
Interpreting attenuation as a reflection loss calculate the lower limit to the effective reflectivity at the core cladding boundary
High speed stroboscopic photographs show that the head of a 246 g golf club is traveling at 56.2 m/s just before it strikes a 47.0 g golf ball at rest on a tee. Find the speed of the golf ball just after impact
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