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(a) Calculate the buoyant force on a 2.20 L helium balloon.
N (upward)
(b) Given the mass of the rubber in the balloon is 1.70 g, what is the net vertical force on the balloon if it is let go? You can neglect the volume of the rubber.
A 2.36 kg mass with an initial velocity of v1 = aˆi, where a = 5.75 m/s collides with, Find the final speed of the composite mass
Assume the freezer operates for 5 hours each day, how much power does it require while operating
To kick a football, the kicker rotates his leg about the hip joint. If the velocity of the the kickers shoe is 30.3 m / s and the hip joint is 1.24 m from the tip of the shoe, what is the shoe tip\'s angular velocity
In the August 1992 space shuttle fight, only 250 m of the conducting tether could be let out. What was the angle between the shuttle's velocity and the Earth's field, assuming the conductor was perpendicular to the field
A small plastic ball with a mass of 6.50 x 10?3 kg and a charge of +0.15uC is suspended from an insulating thread, What is the magnitude of the charge on each plate
The surface waters of tropical oceans are at a temperature of 28?C while water at a depth of 1200 m is at 3?C. What is the maximum efficiency possible of such a heat engine
An airplane has a mass of 20,000 kg and takes off under the control of a constant net force of 30,000 N. What is the net force that acts on the plane's 73 kg pilot.
A(n) 60-g ice cube at 0°C is placed in 730 g of water at 28°C. What is the final temperature of the mixture? °C
A woman stands on a scale in a moving elevator. Her mass is 60.9 kg, and the combined mass of the elevator and scale is an additional 819 kg. Starting from rest, the elevator accelerates upward. Through the acceleration, the hoisting cable applies a ..
a point charge q = +87.1 micro coulombs is held fixed at the origin. A second charge, with mass m = 0.0576 kg and charge q = +3.5 micro coulombs, Find the electric potential energy of the system of charges
An object is 17 mm in front of a converging lens, and the image is 3 mm behind the lens. What is the focal length of the lens? Reply In mm
A 2.5 meter long elastic cord is fixed at both ends. at what frequency should this cord be vibrated such that a n-10 standing wave is produced
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