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A weather balloon is designed to expand to a maximum radius of 24 m at its working altitude, where the air pressure is 0.030 atm and the temperature is 200 K. If the balloon is filled at atmospheric pressure and 259 K, what is its radius at liftoff?
A charge -1.1 × 10^-5 C is ?xed on the x-axis at 9 m, and a charge 8 × 10^-6 C is ?xed on the y-axis at 4 m. Calculate the electric potential at the origin
A -23.8 nC charge is located at the origin. What is the magnitude of electric field at the position (-13 cm, -13 cm)
A 1.50- ?C charge is placed at the center of a cube of sides 3.10 cm. Determine the electric flux through each of the sides
A concave mirror forms an image on a screen twice as large as the object. how far is the object moved
An electron is traveling through a uniform electric field. The field is constant and given by E=(2.00 x 10^-11 N/C)i - (1.2 x 10^-11 N/C)j. At t=0 s the electron is at the orgin and traveling in the x direction at a speed of 1.90 m/s. What is its pos..
find the lowest frequency that make constructive interference.
aisle by a shopper who exerts a constant horizontal force of 40.0 N. If all frictional forces are neglected and the cart starts from rest, illustrate what is the grocery cart's final speed?
A hot-air balloon is accelerating upward under the influence of two forces, its weight and the buoyant force. What is the acceleration of the rising balloon
An airplane has a mass of 2.6 x10^6 kg, and the air flows past the lower surface of the wings at 95m/s. If the wings have a surface area of 1200m2, how fast should the air flow over the upper surface of the wing if the plane is to stay in the air?..
A train slows down as it rounds a sharp horizontal turn, going from 80.0 km/h to 58.0 km/h in the 13.0 s that it takes to round the bend. Compute the acceleration at the moment the train speed reaches 58.0 km/h
A simple pendulum consists of a small object of mass m (the "bob") suspended by a cord of length l of negligible mass. A force F is applied in the horizontal direction (so F is Fi), Determine the work done by the gravitational force on the bob
A man throws a baseball straight up in the air at 19.6 m/s. How many seconds does it take to reach the top
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