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A 4.50 x 102 kg hot-air balloon takes off from rest at the surface of the earth. The nonconservative wind and lift forces take the balloon up, doing +9.70 x 104J of work on the balloon in the process. At what height above the surface of the earth does the balloon have a speed of 7.90 m/s?
A spherically spreading EM wave has an average intensity of 570 mW/m2 at a point 9.5 m away from the source. What is the rms value of the electric field
the oscillations of an actual spring-block system slowly reduce in amplitude and finally the system comes to a halt.
a car at the indianapolis-500 accelerates uniformly from the pit area going from rest to 295 kmh in a semicircular arc
In a physics demonstration, two rubber balls are dropped down a tube towards the ground,with the lighter ball behind, How high does the light ball rise after the two collisions
a gas cylinder containing 3.88 mol of helium has a pressure of 549 mm hg at 298 k.if 1.22 mol of neon is added to this
A diver springsupward from a board that is three meters above water. At an instanthe contacts the water his speed is 9.20 m/s and his body makes anangle of 78.0owith respect to the horizontalsurface of the water.
a luge and its rider with a total mass of 86 kg emerge from a downhill track onto a horizontal straight track with an
A bullet of mass 5.00g is fired horizontally into a wooden block of mass 1.17kg resting on a horizontal surface. What was the initial speed of the bullet
Consider a system of two bound particles (e.g., two nucleons bound by the weak force), of spins S1, S2, with s1 = s2 = 1/2. In an external magnetic field, the interaction Hamiltonian is H = µB · S, with S = (S1 + S2). A random distribution (contai..
an electron experiences a magnetic force with a magnitude of 4.60times10?15 when moving at an angle of 60.0 with
A camera with interchangeable lenses is used to photograph a distant object. The angular size of the object is 19 degrees. What is the longest focal length lens
A ball with mass 2.5 kg is moving in outer space with a velocity of 6.0 m/s horizontally, Find the final velocity of the pair
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