A 1.33 kg dense mass is on the end of a 4.50 m "string"
(a) What would be the period of the pendulum on Earth?
(b) If the mass were doubled, what would be the frequency of oscillation?
(c) What would be the period on the planet Mars where gravity is 38.% that of the Earth?
(a) 4.26 s
(b) 0.235 Hz
(c) 6.9 s
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The eerie and pretty northern and southern lights that are produced when gases in Earth's upper atmosphere glow from energy delivered by the solar wind are referred to as _____
A) aurorae B) coronal holes C) solar flares D) spicules
Consider a flat steel plate with a hole through its center as shown in Fig.17-1. When the plate's temperature is decreased, the hole will
A) contract only if it takes up more than half the plate's surface area. B) expand if it takes up less than half the plate's surface area. C) contract. D) expand. E) remain the same size.
If there is a first-quarter moon visible from Paris one evening, six hours later in New York there will be full moon visible.
Answer the following statement true (T) or false (F)
If the magnetic field in a traveling electromagnetic wave has a maximum value of 16.5 nT, what is the maximum value of the electric field associated with it?
A) 5.5 × 10-17 V/m B) 49.5 × 10-1 V/m C) 4.95 × 10-1 V/m D) 55.0 × 10-16 V/m E) 55.0 × 10-15 V/m