A bike (shown in a top view in the diagram) travels around a curve with its brakes on, so that it is constantly slowing down. Which of the arrows shown most closely approximates the direction of the bike’s acceleration at the instant it is at the position shown? (Hint: Draw a motion diagram.)
A. A
B. B
C. C
D. D
E. E
F. F
T. T
E. E
Physics & Space Science
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With a prime focus reflector, why is digital imaging much easier than using an eyepiece for visual work?
What will be an ideal response?
Physics & Space Science
Galaxy A is 300 Mpc from Galaxy B. Hubble's Law says that V=H0 x D. About how fast is Galaxy A receding from the perspective of Galaxy B? Use a value of 75 km/s/Mpc for Hubble's constant.
A. 225 km/s B. 30000 km/s C. 75 km/s D. 22500 km/s E. 15000 km/s
Physics & Space Science
A depth change of 10 metres/33 feet causes a pressure change of.
a. 1 bar/ata b. 2 bar/ata c. 3 bar/ata d. 4 bar/ata
Physics & Space Science
Which one of the following is the correct electronic configuration for the sodium atom?
A) 1 s12 s23 p62 s2 B) 1 s22 s13 p62 s2 C) 1 s12 s22 p6 D) 1 s22 s22 p63 s2 E) 1 s22 s22 p63 s1
Physics & Space Science