Irr II galaxies may be the result of a collision, or close encounter, of two normal galaxies
Indicate whether the statement is true or false
TRUE
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The length of a certain wire is kept same while it's radius is doubled. What is the new resistance of this wire?
A certain engine extracts 1300 J of heat from a hot temperature reservoir and discharges 700 J of heat to a cold temperature reservoir. What is the efficiency of this engine?
A) 46% B) 54% C) 86% D) 27% E) 13%
A certain part of the electromagnetic spectrum ranges from 200 nm to 400 nm. What is the highest frequency associated with this portion of the spectrum?
A) 1.50 × 1014 Hz B) 7.50 × 1013 Hz C) 7.50 × 1014 Hz D) 7.50 × 1015 Hz E) 1.50 × 1015 Hz
A ping-pong ball has an average density of 0.140 g/cm3 and a diameter of 3.80 cm. What force would be required to keep the ball completely submerged under water?
a. 0.484 N c. 0.516 N b. 0.242 N d. 0.258 N