Sound cannot travel through solid steel
Indicate whether the statement is true or false
F
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______________ are cool, with temperatures of about 100 K and densities of ten to a few hundreds of atoms per cubic centimeter
Fill in the blank(s) with correct word
When a beam of light, originally traveling in air, enters a piece of glass having an index of refraction of 3/2, its speed
A) increases by a factor of 3/2. B) is reduced to 2/3 its original value. C) is unaffected.
The tensile strength (the maximum tensile stress it can support without breaking) for a certain steel wire is 3000 MN/m2. What is the maximum load that can be applied to a wire with a diameter of 3.0 mm made of this steel without breaking the wire?
A) 64 kN B) 9.0 kN C) 42 kN D) 85 kN E) 21 kN
You would like to see through the dust in a cloud to find protostars. Which band of the electromagnetic spectrum would you need to look in?
a. infrared b. visual c. UV d. X-ray