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A hot-air balloon has a volume of 2741 m3. The density of the air outside the balloon is 1.205 kg/m3. The density of the hot air inside the balloon is 0.9377 kg/m3. How much weight can the balloon lift (counting the balloon itself)?
A 1 kg rubber ball is bounced off a hard floor just prior to its hitting the floor, the ball has a downward speed of 2 m/s. find Is the collision elastic or inelastic
Derive the speed of a satellite in a circular orbit of radius R about planet of mass M, show the connection between v and T (orbital period)
In frozen Minnesota the Winter Sports Carnival includes some unusual events. Since it is dangerous to run on ice, each runner runs on ice, With what speed does the crowd see the woman moving
What is the magnification of an astronomical telescope whose objective lens has a focal length of 77 cm, What is the overall length of the telescope when adjusted for a relaxed eye
Calculate the acceleration of a skier heading down a 10.0 deg, slope, assuming the coefficient of friction for waxed wood on wet snow
A 250 g Teddy Bear and a 5 kg baby stroller are nudged off a window sill and fall 5 meters to the ground. Determine the speeds and kinetic energies of both objects
What is the Lens Equation? What do o, i and f stand for in the equation and what are the five parts of the Optical Bench used in this experiment? Briefly describe what each part does.
it accelerates with a constnat acceleration of 2.00 m/s^2 until its engines stop at an attitude of 200 m. the rocket continues move in free fall until its reaches the ground. Illustrate what is the total time the rocket is in the air?
Three point charges Q1 = 2.2 mu or micro C, Q2 = 4.2 mu or micro C and Q3 = 3.2 mu or micro C, are arranged as shown
A 1-m-tall barrel is closed on top except for a thin pipe extending 4.2m up from the top. What is the pressure on the bottom when water is added to fill the pipe to its top
A skier of mass m glides down a hill of slope ? at constant speed. If she travels a distance d down the hill, what is the work done by friction
Under certain conditions, the human body can withstand an acceleration of 10 g%u2019s. What is the net force (in Newtons) acting on a person
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