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Question1
To measure weight of the cat, a person places a 100 N box and a 60 N box from the ends of a uniform pole that is pivoted at its center. The system balances when the cat stands at a point of the rods length from the 60 N boxes. What is the estimated mass of the cat?
Question2
Atoms can be cooled by multiple laser beams. in such an experiment, the temperature of sodium atoms can be cooled to 0.1 mK. What is rms speed of the atoms at this temperature? The atoms can be held trapped for about 1 s in a 1 cm trap. Estimate this time with the time for one of the atoms to wonder out of the trap if there was no trap action.
Plane monochromatic waves with wavelength 550nm are incident normally on a plane transmission grating having 360slits/mm. Find the angle of deviation in the third order
A man stands on a scale in an elevator that is accelerating upward. compute the magnitude of the acceleration of the elevator?
A 4.50 kg package slides 1.30 m down a long ramp that is inclined at 10.8° below the horizontal. Calculate the work done on the package by gravity
The mass of the Moon is 7.18X10^22 kg and radius is 1738 km. If your mass is 90 kg, what would be your weight (gravitational force of attraction) on the Moon
In a hydraulic lift, the maximum gauge pressure is 18.7 atm. what is the heaviest vehicle that can be lifted
compute the distance x the spring was compressed.
Assume that the Sun radiates like an ideal thermal source at a temperature of 6000 K, What is the intensity of the solar radiation emitted in the range 550.0 nm to 552.0 nm
A coaxial cable consists of a cylindrical metal sheath of radius b=3.5cm surrounding a conducting wire with outer radius a=.6cm
On a frictionless table, a glob of clay of mass 0.340kg strikes a bar of mass 1.44kg perpendicularly at a point 0.10m from the center of the bar and sticks to it.
A block of mass 0.6 kg is moving up a 40 degree inclined plane at a speed of 2 m/s. how far up the plane will the block go before stopping
The far point of a nearsighted person is 5.0 m from her eyes, and she wears contacts that enable her to see distant objects clearly. How high is the image formed by the contacts
An electric motor with a 4.7-hp output drives a machine with an efficiency of 30%. What is the energy output of the machine
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