CHAPTER 1 OSCILLATORY MOTION
Physics F4
11. A hanging spring has length 10 cm. A 100 g mass is hung from the
stretching, stretching it to 12 cm. what will be the length of the spring
this mass is replaced by a 200 g mass?​

Name three different units of energy used to measure heat and describe what type of situations each is usually used.

Thomas his older brothers, who own a junk yard, on the weekends to earn extra money. he likes to them push broken-down cars to the back of the junk yard because it makes him feel strong. last saturday, they pushed three cars with different weights, and he noticed he used different amounts of force for each one. the cars were the following weights: white car: 2,700 kg red car: 1,500 kg blue car: 2,100 kg think about how much force is needed to move each car. which correctly lists the cars in order from the most to least amount of force needed to move them? a) white, blue, red b) blue, red, white c) red, white, blue d) white, red, blue

Astudent wears sunglasses to her read a book more easily which wave interaction occurs as light passes from the air into the plastic lenses? a polarization b.refraction c.diffraction d. interference