The heavier elements like iron and nickel are abundant on Earth's surface, and the silicates dominate at the center of Earth.
Answer the following statement true (T) or false (F)
False
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Simple Pendulum: A pendulum of length L is suspended from the ceiling of an elevator. When the elevator is at rest the period of the pendulum is T. How would the period of the pendulum change if the supporting chain were to break, putting the elevator into freefall?
A. The period does not change. B. The period increases slightly. C. The period decreases slightly. D. The period becomes zero. E. The period becomes infinite because the pendulum would not swing.
The meaning of the phrase "space is relative" is that
A) all observers measure the same speed for a lightbeam. B) two observers, both in the same reference frame, observe different lengths for different objects. C) two observers, in different reference frames, observe different lengths for different objects. D) two observers, in different reference frames, observe different lengths for the same object. E) two observers, both in the same reference frame, observe different lengths for the same object.
A sound wave in air travels at a speed of 340 m/s. If the wavelength is 0.100 m, in what range of the sound spectrum is the wave?
A conducting sphere of radius 20.0 cm carries an excess charge of +15.0 µC, and no other charges are present. (k = 1/4??0 = 8.99 × 109 N ? m2/C2) The potential (relative to infinity) due to this sphere at a point 12.0 cm from its center is closest to
A) zero. B) 674 kV. C) 1130 kV. D) 3380 kV. E) 9380 kV.