What does the spring constant k measure?
a. Period.
b. Frequency.
c. How much force it takes the string to stretch a given distance.
d. How far the spring can be stretched before the stretch permanently deforms the spring.
e. Amplitude.
c
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Indicate whether the statement is true or false
Which of the following statements does not use the term light-year in an appropriate way?
A) It's about 4 light-years from here to Alpha Centauri. B) It will take me light-years to complete this homework assignment. C) A light-year is about 10 trillion kilometers. D) It will take the Voyager spacecraft about 20,000 years to travel just 1 light-year. E) The Milky Way Galaxy is about 100,000 light-years in diameter.
A 15-m rope is pulled taut with a tension of 140 N. It takes 0.545 s for a wave to propagate along the rope. What is the mass of the rope?
A) 1.7 kg B) 2.1 kg C) 2.8 kg D) 5.1 kg E) 3.2 kg
A plane convex lens is made of glass (n = 1.5) with one flat surface and the other having a radius of 20 cm. What is the focal length (in cm) of the lens?
a. 20 b. 30 c. 40 d. 10 e. 50