A helium-filled balloon has a volume of 1 m3 . As it rises in the earth's atmosphere, its volume expands. What will its new volume be (in m3) if its original temperature and pressure are 20°C and 1 atm, and its final temperature and pressure are -40°C and 0.1 atm?
a. 4
b. 6
c. 8
d. 10
e. 1.5
C
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Specific Heat: A glass beaker of unknown mass contains 74.0 ml of water. The system absorbs 2000.0 cal of heat and the temperature rises 20.0°C as a result. What is the mass of the beaker? The specific heat of glass is 0.18 cal/g ? °C, and that of water is 1.0 cal/g ? C°.
A. 140 g B. 560 g C. 540 g D. 270,000 g
Which of the following represents the longest distance?
a. One parsec b. One astronomical unit c. One light-year d. One right ascension
Mass on a Spring: A 0.50-kg object is attached to an ideal spring of spring constant (force constant) 20 N/m along a horizontal, frictionless surface. The object oscillates in simple harmonic motion and has a speed of 1.5 m/s at the equilibrium position. What are (a) the total energy and (b) the amplitude of vibration of the system?
What will be an ideal response?
A charged particle is injected into a uniform magnetic field such that its velocity vector is perpendicular to the magnetic field lines. Ignoring the particle's weight, the particle will
A) follow a spiral path. B) follow a circular path. C) move in a straight line. D) move along a parabolic path.