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A 2Kg wood block is attached to a .3 g bucket by a massless string rests on the durface of and inclined plan of 20 degrees. the coefficient of friction between the block and the inclined plane are static friction is equal to .4 and kinetic friction of .2 A 2kg wood block attached to a .3 kg bucket by a massless string rests on a surface of an inclined plane of 20 degrees. The coefficients of friction between the block and the inclined plane is a static friction of .3 and a kinetic friction of .5. How much water can be poured in the bucket before the block slides up? At this point the blovk is given a gentle push. what is the acceleration at which the bucket drops?
A 130 lb subject did 33 lifts/min up a 30 cm step for 5 minutes, what was the work rate, power output and what was the total work done
A beam of light is incident from air on the surface of a liquid. find the critical angle for the liquid when surrounded by air
Cliff and Will are carrying a uniform 2.0m board of mass 74kg. Will is supporting the board at the end while cliff is 0.6m from the other end, Find the normal forces exerted by Cliff and Will
The size of an atom is approximately 10-8cm. to locate an electron within the atom, one should use electromagnetic radiation of wavelength not longer than, say, 10-9cm, what is the energy of a photon with such a wavelength
An air-traffic controller observes two aircraft on his radar screen. The first is at altitude 800 m, horizontal distance 19.4 km, and 22.5° south of west. What is the distance between the two aircraft
A proton, which is the nucleus of a hydrogen atom, can be modeled as a sphere with a diameter of 2.4 fm, what is the density of the proton
Under some circumstances, a star can collapse into an extremely dense object made mostly of neutrons and called a neutron star. find the angular speed of the neutron star
A system consists of three particles with these masses and velocities: mass 3.2 kg, moving north at 3.0 m/s; mass 3.8 kg, moving south at 4.9 m/s, What is the total momentum of the system
An elevator has a downward acceleration of 1 m/s2. A person, having a weight of 800 N as measured by a scale at rest on the ground, steps on a scale in the elevator. What does the scale read? A) 0 N. B) Approximately 80 N. C) Between 80 N and 800 ..
A 3.25G bullet picks up an electric charge of 1.75uC as it travels down the barrel of a rifle. Calculate the magnitude of the bullet's acceleration due to the magnetic force at the instant it leaves the rifle barrel
The person pushes the crate a distance of 12 m as measured along the ramp. Find the work done by gravity on the crate
An ideal gas initially at 20°C and 219 kPa has a volume of 4.70 L. It undergoes a quasi-static,, Find the heat added to the gas during the expansion.
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