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1. A 0.12 m radius grinding wheel takes 5.5 sec to speed up from 2.0 rad/sec to 11.0 rad/sec. What is the wheel's average angular acceleration?
2. A solid sphere of mass 4.0 kg and radius 0.12 m is at rest at the top of a ramp inclined 15 degrees. It rolls to the bottom without slipping. The upper end of the ramp is 1.2 m higher that the lower end. Find the sphere's total kinetic energy when it reaches the bottom.
3. The standard kilogram is a platinum-iridium cylinder 39.0 mm in height and 39.0 mm in diameter. What is the density of the material?
ricardo and jane are standing under a tree in the middle of a pasture. an argument ensues and they walk away in
400 g block, attached to the end of an ideal spring (horizontal) with force constant k=10 K/m, Calculate angular frequency of the oscillations
A pendulum consists of a 4.0 kg stone swinging on a 4.4 m string of negligible mass. The stone has a speed of 7.5 m/s when it passes its lowest point. what is the total mechanical energy of the system
While running in a cross country meet, a member of women team of SJU dissipates about 0.35 Joule of mechanical energy per step per kilogram of her body mass. determine what is her mass
two charges -14 c and 3.3 c are fixed in place and separated by 3.3 m. a at what spot along a line through the charges
Suppose a 50.0kg teenager picks up a 11.0kg stereo and raises it 0.750 m from the floor to a tabletop. (A) how much work did he do on the radio?
The Earth's rate of rotation is constantly decreasing, causing the day to increase in duration. In the year 2006 the Earth took about 0.840 s longer to complete 365 revolutions than it did in the year 1906. What was the average angular acceleration o..
A force of 40.0 N is required to pull a 10.0-kg wooden block at a constant velocity across a smooth glass surface on Earth. What force would be needed to pull the same wooden block across the same glass surface on the planet Jupiter?
The nucleus of an atom consists of protons and neutrons (no electrons). A nucleus of a carbon-12 isotope contains six protons and six neutrons, while a nitrogen-14 nucleus comprises seven protons and seven neutrons.
When light of wavelength 350 nm falls on a potassium surface, electrons having a maximum kinetic energy of 1.31 eV are emitted, find the cutoff wavelength
A 2.0g sample of steam at 100C loses 1140 calories of heat. What is the resulting temperature of the sample
A long, straight wire of length 1.5 m carries current I = 7.0 A. What is the magnitude of the force on the wire
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