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Very fine smoke particles are suspended in air. The translational rms speed of a smoke particle is 2.3 x 10-3 m/s, and the temperature is 285 K. Find the mass of a particle.
A river steamboat travels 36 miles downstream in the same time that it travels 24 miles upstream. What is the currents speed
In a hot star, because of the high temperature, an atom can absorb sufficient energy to remove several electrons from the atom. Find the wavelengths of the next three spectral lines nearest to the line of longest wavelength
A drop of water on a countertop reflects light from a flower held 3.10 cm directly above it. What is the focal length of the water drop
The power required by an ice maker is 225 W and is the rate at which it does work. determine the maximum amount of ice the unit can produce in one day
A ball rolls from rest down a roof without slipping. the roof has pitch of 30 degree until there is a flat, horizontal section near the edge of the roof. what was its angular momentum when it left the roof
A shell is fired from a gun with a muzzle velocity of 35 m/s, at an angle of 60° with the horizontal. How far from the gun does the other fragment land
Hydraulic engineers often use, as a unit of volume of water, the "acre-foot", defined as volume of water that will cover 1 acre of land to a depth of 1 ft. A severe thunderstorm dumps 2.0 in. of rain in 30 min on a town of area 35 km2. What volume..
question1hold switch closed. place a magnetic field sensor between the turns of the slinky by its center. rotate the
You notice a group of children beside the ramp. One has a 2 kg rock tied to the end of a string that is 3 m long, What will happen if the string breaks? why?
a conductor in the shapr of a sperical shell of radii 8 and 11 cm is charged to 20 uC, find the electric potential at each of these radii
A wind is blowing straight from north to south at an unknown speed. When you hold up a piece of thread you can see that the wind stretches it out so that it points from your hand to the south. What is the speed of the wind relative to the ground
two masses are separated by 3.85m. the mass of objects are 5.98kg and 7.35 kg. how far is the center of mass of the system
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