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On a sunny morning in a field, the atmospheric pressure is 10^5N/m2 and the temperature is 279 K and you are at a family reunion. Uncle Louie has filled a balloon with 1000m3 of preheated air at atmospheric pressure and a temperature of 300 K. The mass of the empty balloon and its load is 240 Kg. Under these conditions, the balloon rises above its burden, but the airship remains grounded. To begin the ascent, the air within the balloon is brought to a higher temperature. It expands but remains at the pressure of 10^5N/m2 . No air enters or leaves the balloon. How much heat must be added to the air in the balloon to initiate the flight?
two spaceships are traveling in the same direction. With respect to an inertial frame of reference spaceship A has a speed of 0.850c. Find the speed Vab of spaceship A relative to spaceship B
An astronomical telescope is designed with an overall magnification of 80x. The objective has a focal length of 98.0 cm. What should be the focal length of the eyepiece
a wooden speaker with a mass of 12.57 kg is attached to a light spring with a spring constant of 145 nm. the system is
Use the radius of the sun 7 x 108 m and the distance to the Earth of 1 AU= 1.5 x 1011 m to determine the amplitude of the electric field at the surface of the sun from the solar radiation content of 1400 W/m2 measured at the surface of the Earth
In Fig. 15-53, three 18000 kg ore cars are held at rest on amine railway using a cable that is parallel to the rails, which areinclined at angle θ = 34°. The cable stretches 21 cm justbefore the coupling between the two lower cars breaks, detachin..
A 1100-kg sports car (including the driver) crosses the rounded top of a hill (radius = 85.0 m) at 23.0 m/s. Determine the normal force exerted by the road on the car
two einstein solids are brought together so that they can exchange energy. solid a has 78 oscillators and solid b has
a circular polarized electromagnetic wave in vacuum with e xhatacoswt-bzyhatdsinwt-bz hits under brewsterangle a plane
An ideal polarizer with its transmission axis rotated 30° to the vertical is placed in a beam of unpolarized light of intensity 10 W/m2. What is intensity of the beam
A violin string 15.2 cm long and fixed at both ends oscillates in its n = 3 mode. The speed of waves on the string is 273 m/s, and the speed of sound in air is 348 m/s. What are (a) the frequency and (b) the wavelength of the emitted sound wave?
A turntable with a moment of inertia of 4.8 kg · m2 rotates freely with an angular speed of 33 1/3 rpm. Calculate the angular speed of the turntable
How does any elementary particle interact with the EM-Force to get an electric charge? What interactions do they have with photons?
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