A 0.650-kg object is swung in a circular path and in a vertical plane on a 0.500-m-length string. If the angular speed at the bottom is 8.00 rad/s, what is the tension in the string when the object is at the bottom of the circle?
a. 27.2 N
b. 20.8 N
c. 14.4 N
d. 6.37 N
c
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Matter Waves: What is the wavelength of the matter wave associated with an electron moving with a speed of 2.5 × 107 m/s? (melectron = 9.11 × 10-31 kg, h = 6.626 × 10-34 J ? s)
A. 29 pm B. 35 pm C. 47 pm D. 53 pm
An ideal gas is allowed to expand slowly at constant temperature to twice its original volume. During the expansion, the gas absorbs 200 kJ of heat
(a) What is the change in the internal (thermal) energy of the gas during the expansion? (b) How much work does the gas do during the expansion? What will be an ideal response?
Which of the following is true of supermassive black holes?
A) They are found only in elliptical galaxies. B) They are not found in Seyfert galaxies. C) They can be triggered into eruptions because of tidal interactions. D) They are not affected by tidal interactions between galaxies.
The theory that inflation occurred in the early universe is incompatible with the theory of relativity
Indicate whether the statement is true or false