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A balloon is filled with 4.50 liters of helium at a pressure of 1.30 atm and a temperature of 25.0° C.
a) Discover the mass of the helium.
b) Find the acceleration of the balloon if the rubber has a mass of 4.00 g.
c) Discover the buoyant force on the balloon if it is placed in the atmosphere with air pressure at 1.00 atm and temperature at 24.5° C.
An object moves with constant acceleration 4.20 m/s^2 and over a time interval reaches a final velocity of 11.8 m/s. calculate the distance it travels during this interval
A tiger leaps horizontally from a 5.90 m high rock with a speed of 4.10 m/s. How far from the base of the rock will she land.
A 539 Hz sound wave travels through a substance. What is the speed of sound in the substance
two large parallel conducting plates are 21 cm apart and have charges of equal magnitude and opposite sign on their
at one location on the earth the rms value of the magnetic field caused by solar radiation is 1.95 microt.a calculate
Two parallel plate capacitor plates have an area of 1 mm^2 and a spacing of 1 µm(air gap). One is fixed and another is suspended by a mechanical spring with a force constant of 1 N/m.
Guns on World War II battleships could shell targets 15 km away. Find (a) the minimum launch speed needed to achieve that range and (b) the shell s flight time under these conditions
A certain person in a typical conversation speaks at a soundlevel of 63 dB. The music at a certain rock concert reaches a soundlevel of 110 dB. How many times as great is the intensity of the music?
A 9.10 kg board is wedged into a corner and held by a spring at a 50° angle, as the Illustrating shows. The spring has a spring constant of 196 N/m and is parallel to the floor.
A string 1.4 m long with a mass of 2.1 g is stretched between two fixed points with a tension of 80 N. Find the frequency of the fundamental on this string
The two stars in a binary star system have masses 1.9 x 10^30kg and 6.1 x 10^30kg. What is the speed of the heaviest star
Two slits spaced 0.280mm apart are placed 0.640m from a screen and illuminated by coherent light with a wavelength of 680nm. What is the distance on the screen from the center of the central maximum to the first minimum
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