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Calculate the average density of a red giant star in grams per cubic centimeter. Take the star's mass to be 2*10^33 gm and its radius to be 3*10^12 cm. How does this density compare with that of the air we breathe (about 10^-3 gm/cm3)?
A 1,220-kg car traveling initially with a speed of 25.0 m/s in an easterly direction crashes into the rear end of a 9,500-kg truck moving in the same direction at 20.0 m/s, how much mechanical energy is lost after the collision
R-134a is flowing at 1kg/s and throttled from 850 kPa and 40 C to - 40 C. Heat is gained at a rate of 1 kJ/s from the surroundings at 25 C
A drinking fountain shoots water about 14 cm up in the air from a nozzle of diameter 0.60 cm. What gauge pressure does the pump have to provide
An air bubble at the bottom of a lake 39.00 m deep has a volume of 1.00 cm3. what is the volume of the bubble just before it reaches the surface
What is the ratio of the dynamic viscosity of air to that of water at standard pressure and a temperature of 20?C? Find the ratio of the kinematic viscosity of air to that of water for the same condition?
A ray of sunshine is passing from diamond into crown glass; the angle of incidence is 35.00 degrees. Determine the angle between the refracted blue and red rays
Two forces are applied to a car in an effort to accelerate it. The first force, F1 = 328 N, is applied at an angle α = 35° to the forward dashed line. The second force, F2 = 544 N, is applied at an angle β = 8° to the forward dashed line. (a) What is..
A diffraction grating 22.0mm wide has 6000 rulings. Light of wavelength 592nm is incident perpendicular on the grating. What is the largest value of theta at which maxima appear on a distant viewing screen
A convex spherical mirror with a radius of curvature of 11.0 cm produces a virtual image one third the size of the real object. Where is the object
Two loudspeakers emit sound waves along the x-axis. The sound has maximum intensity when the speakers are 23cm apart. What is the wavelength of the sound
Some thermometers indicate temperature by means of the thermal expansion of alcohol. by what percent does the volume change if the temperature changes by 9 F
For alpha particles of energy 7.68 MeV scattered from a platinum foil two microns thick, find the collision diameter
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