According to the data from the microwave background radiation, at what speed and in what direction is Earth moving through the universe?
A) 380 km/s in the direction of Leo
B) 70 km/s in the direction of the Big Bang
C) 300,000 km/s in the direction of Polaris
D) 250 km/s in the direction of Vega
E) 600 km/s North
A
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The motion of atoms and molecules that most affects temperature is
A) translational. B) rotational. C) vibrational. D) none of the above
Which of the following is an example of the type of force that acts at a distance?
a. gravitational b. magnetic c. electrical d. all of the above
A(n) ______________is denser than a neutron star
Fill in the blank(s) with correct word
A mass is suspended from a string in an airplane. As the plane is in the process of taking off, it is found that the string, instead of being vertical, hangs at an angle of 13° from the vertical. What is the acceleration of the plane at this time?
a. 2.3 m/s2 c. 9.1 m/s2 b. 3.8 m/s2 d. 3.5 m/s2