Quasars are the brightest objects in the universe
Indicate whether the statement is true or false
TRUE
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H I clouds can be observed using _____
a. optical telescopes above the earth's atmosphere b. 21-cm radiation c. x-ray radiation d. infrared radiation e. ultraviolet radiation
Newton's Second Law in 1 Dimension: A certain aircraft has a mass of 300,000 kg. At a certain instant during its landing, its speed is 27.0 m/s. If the braking force is a constant 445,000 N, what is the speed of the airplane 10.0 s later?
A. 10.0 m/s B. 12.2 m/s C. 14.0 m/s D. 18.0 m/s E. 20.0 m/s
Which statement regarding the mix of state revenues is FALSE?
a. The 50 states combined had over $1.6 trillion annual revenue in 2011.
b. Over 70 percent of all stategenerated (or "own source") revenues come from taxation.
c. Most revenue from direct charges for public services is in the form of tuition for higher education.
d. With few exceptions, states generate nearly all of their tax revenues from the general sales tax.
An object travels halfway around a circle at a constant instantaneous speed .What is the magnitude
of its average velocity during this time interval?
A.
B. 1.41
C. 1.57
D./1.41
E. /1.57