What is the minimum uncertainty in determining the position of an electron if the speed of the electron is 6.0 km/s within an accuracy of 0.0040%? (melectron = 9.11 × 10-31 kg, h = 6.626 × 10-34 J ? s)
A) 0.11 mm B) 0.24 mm C) 0.34 mm D) 0.15 mm E) 0.48 mm
E
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Which of the following could be a stable planetary orbit in a binary system?
A) a large orbit around both stars in a wide binary system B) an orbit close to one of the stars in a wide binary system C) a "figure-of-eight" orbit about both stars in a close binary system D) an orbit close to one of the stars in a close binary system
An object moves at a constant velocity of 12 m/s to the southwest for an interval of 20 s. Halfway through this interval, what is the magnitude of its instantaneous velocity?
a. It can be any value from 0 to 24 m/s. c. 12 m/s b. 6 m/s d. More information is needed.
_______________ clusters of galaxies contain closely spaced galaxies and often contain giant elliptical galaxies and a hot intergalactic medium
Fill in the blank(s) with correct word
A sewing machine needle moves up and down in simple harmonic motion with an amplitude of 1.27 cm and a frequency of 2.55 Hz. (a) What is the maximum speed of the needle? (b) What is the maximum acceleration of the needle?
What will be an ideal response?