In what constellation is the Sun be located at the moment of the March equinox?
A) Pisces
B) Aries
C) Orion
D) Taurus
E) Andromeda
A) Pisces
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If the temperature of the air rises, the frequency you hear is higher than f
Indicate whether the statement is true or false
A simple pendulum, with a 4.4 kg mass and length 75. cm, is released from rest at an angle of 50.°
(a) To what height does the mass swing on the other side? (b) What is the speed of the mass at the bottom of the swing?
Photoelectric Effect Using Stopping Potential: For a certain metal, light of frequency 7.24 × 10-14 Hz is just barely able to dislodge photoelectrons from the metal. (h = 6.626 × 10-34 J ? s, 1 eV = 1.60 × 10-19 J, e = 1.60 × 10-19 C)(a) What will be the stopping potential if light of frequency 8.75 × 10-14 Hz is shone on the metal?(b) What is the work function (in electron-volts) of this metal?
What will be an ideal response?
The escape velocity inside a black hole is
A. half the speed of light. B. infinity. C. greater than the speed of light. D. zero. E. unknown.