Now that we know there is dark energy in the universe, what will be the fate of the universe?
A) it will continue to expand at exactly the same rate as it is now.
B) the universe will definitely contract again eventually, because we know dark energy will decay away over time.
C) it will suddenly disappear
D) the universe will continue to expand forever because we know dark energy will last forever.
E) we don't know yet the fate of the universe; it may continue to expand forever or it may contract again.
Ans: E) we don't know yet the fate of the universe; it may continue to expand forever or it may contract again.
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A car that is initially moving at 7.50 m/s begins to accelerate forward uniformly at 0.550 m/s2. (a) How long after beginning to accelerate does it take the car to move 3.50 km? (b) How fast is the car moving just as it has traveled 3.50 km?
What will be an ideal response?
A resting blood pressure of 140 over 90 or more is considered hypertension.
Answer the following statement(s) true (T) or false (F)
Express a body temperature 98.6°F in Celsius degrees
A) 72.6°C B) 45.5°C C) 37.0°C D) 66.6°C
If the speed of sound is 1100 feet per second and a tuning fork oscillates at 440 cycles per second, what is the wavelength ? of the sound produced?
A. 2.5 feet B. 4.4 feet C. 0.4 foot D. 11 feet