If you add 1.33 MJ of heat to 500 g of water at 50°C, what is the final temperature of the steam? The latent heat of vaporization of water is 22.6 × 105 J/kg. The specific heat of steam is 2010 J/(kg K)
A) 100°C
B) 112°C
C) 123°C
D) 147°C
E) 195°C
E
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The velocity of a particle moving along the x axis is given for t > 0 by vx = (32.0t ? 2.00t3) m/s, where t is in s. What is the acceleration of the particle when (after t = 0) it achieves its maximum displacement in the positive x direction?
a. ?64.0 m/s2 b. zero c. 128 m/s2 d. 32.0 m/s2 e. ?32.0 m/s2
Which of the following typically orbit within the disk of our galaxy?
A) stars of spectral types O and B B) globular star clusters C) the Large and Small Magellanic Clouds D) other galaxies
According to the theory that active galactic nuclei are powered by supermassive black holes, the high luminosity of an active galactic nucleus primarily consists of ________
A) intense radiation emitted by the black hole itself B) light emitted by hot gas in an accretion disk that swirls around the black hole C) the combined light of thousands of young, high-mass stars that orbit the black hole D) radio waves emitted from radio lobes found on either side of the galaxy we see in visible light
According to Newton, the greater the distance between gravitationally interacting objects, the
A) less the gravitational force between them. B) more the gravitational force between them. C) constancy of the force between them.