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Dust grains of diameter 0.24 µm and density 1000 kg/m3 are in equilibrium with air (A = 28.9) at a temperature of 270 K . What is the rms speed of the dust particles? 1 m = 106µm. Answer in units of mm/s.
A spaceship of mass 2.30×106kg is cruising at a speed of 5.30×106m/s when the antimatter reactor fails, What is the speed of the third piece
A block starts from rest at the top of a 16 degree inclined plane and encounters a spring, of constant 6.2 kN/m, rigidly attached to the plane. obtain the distance the block travelled before it encountered the spring
The two stars in a certain binary star system move in circular orbits. The first star, Alpha, has an orbital speed of 36.0 Km/s. The second star, Beta, has an orbital speed of 12.0Km/s. What is the mass of the star Alpha
A 0.810 kg particle has a speed of 2.60 m/s at point A and kinetic energy of 8.80 J at B. What is its speed at B? reply in units of m/s.
The lens-to-retina distance of a patient is 0.0201m and the totally relaxed strength of her eye is 50.0D. (a) What lens strength will correct her distant vision? (b) If the eye has an 8% ability to accommodate, what will be the closest object she can..
(a) A thin film of soap with n = 1.34 hanging in the air reflects dominantly red light with λ = 634 nm. What is the minimum thickness of the film?
A particle of mass m can slide freely along a wire. The wire is straight and horizontal, and is made to rotate about an axis perpendicular to one end at a fixed angular speed wo. Find what is the force that the wire exerts on mass
What is the net torque about the origin on a flea located at coordinates (0 m,-8 m, 4 m) when forces F1 = ( 3 N) k and F2 = (-2 N) j act on the flea? i-component of torque?
Suppose you are planning a trip in which a spacecraft is to travel at a constant velocity for exactly eleven months, as measured by a clock on board the spacecraft, how fast must you travel
Place the following temperatures in order from least to greatest, and explain what each temperature represents using thermodynamically sound principles:
A right side view automobile mirror with a radius of curvature of 15.0 m reflects an object at a distance of 10.0 m from the mirror. calculate the magnification factor
A uniform 2.15- kg spinning disk with a radius of 0.233 m is brought to rest by a brake-pad pressed against the side 0.149 m from the rotation axis. What frictional force was applied by the brake pad
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