A leaky faucet drips 40 times in 30s. What is the frequency of the dripping?
A) 1.3 Hz
B) 0.75 Hz
C) 1.6 Hz
D) 0.63 Hz
A
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If you have to select a material and the primary requirement is a high melting temperature, what class of material would you investigate first for suitability?
What will be an ideal response?
Perigee is the point in ____
a. the Moon's orbit when the Moon is farthest from Earth b. an object's orbit around Earth when the object is closest to Earth c. an object's orbit around Earth when the object is closest to the Sun d. a planet's orbit when the planet is closest to its sun e. a planet's orbit when the planet is farthest from its sun
Radioactivity Basics: When an unstable nucleus decays by emitting an alpha particle, the atomic number Z of the nucleus
A. increases by 4. B. increases by 2. C. decreases by 2. D. decreases by 4. E. remains unchanged.
The wave-particle duality applies to
A) photons. B) electrons. C) protons D) all of the above E) none of the above