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Rubidium atoms are cooled to 0.22 uK in an atom trap.
What is their de Broglie wavelength?
How many times larger is this than the 0.25nm diameter of the atoms?
An elevator with a mass 2000kg rises with an acceleration of 1m/s^2. What is the tension in the supporting cables
A person is running at 7 m/s with her hands outstreched abover her head (1.95m from feet to finger tips) she runs exactly horizontally off the edge of a chasm and attempts to grab onto opposite side.
A space station, in the form of a wheel 184 m in diameter, rotates to provide an "artificial gravity" of 7.40 m/s2 for persons who walk around on the outer rim. Find the rotational frequency of wheel (in revolutions per minute) that will produce t..
light of wavelength 600nm is incedent normally on a surface of area 4 cm^2. Determine the power output of the light source
a hiker determines the length of a lake by listening for the echo of her shout reflected by a cliff at the far end of the lake. estimate the length of the lake
A soccer ball is kicked with an initial horizontal velocity of 18 m/s and an initial vertical velocity of 21 m/s, How far from where it was kicked will the ball land
A sphere of radius 0.500 m, temperature 25.5°C, and emissivity 0.873 is isolated in an environment of temperature 77.0°C. What is the sphere's net rate of energy exchange
A wave traveling in the +x direction has an amplitude of 0.186 m, a speed of 3.27 m/s, Write the equation of the wave
The temperature of 3.00 mol of an ideal diatomic gas is increased by 40 degrees C without a change in pressure, How much energy is transferred to the gas as heat
A 6.2-m radius playground merry-go-round with a moment of inertia of 2400 kg·m2 is rotating freely with an angular speed of 1.5 rad/s. What is the angular speed of the merry-go-round right after the two people have stepped on
A bullet is fired from at a shooting range. The bullet hits the ground after 0.32 seconds. How far did it travel horizontally and vertically in this time
A panicular spring has a spring constant of 86 N/m and a mass of 0.548 kg at its end. When the spring is driven in a viscous medium, the resonant motion occurs at an angular frequency of 12.2 rad/s.
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