Work is a vector quantity
Indicate whether the statement is true or false
FALSE
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A star can remain in the giant-star stage for about 90 percent of its total lifetime before it dies
Indicate whether the statement is true or false
The type of radio galaxy that reveals its motion through the intergalactic medium is called a:
A) quasar. B) dual lobe. C) bi-polar jet. D) head-tail. E) Seyfert.
A company that produces pulsed gas heaters claims their efficiency is approximately 90%. If an engine operates between 250°C and 25°C, what is its maximum thermodynamic efficiency?
A. 83% B. 65% C. 43% D. 90% E. 56%
What is the relationship between wave frequency and period? What is the period, in seconds, that corresponds to each of the following frequencies: (a) 10 Hz, (b) 0.2 Hz, (c) 60 Hz?
What will be an ideal response?