PHY 150 Ch 11 Prelecture Exam 2 Questions with correct answers

PHY 150 Ch 11 Prelecture Exam 2 Questions with correct answers The SI base unit for mass is the _______. - kilogram How many millimeters are there in one meter? - 10^3 Which of the following is the basis of the current standard for the meter? a. The meter is defined as the length of a strand of carbon fiber that consists of a specified number of carbon-12 atoms. b. The meter is defined as the distance that light travels in a specified time interval. c. The meter is defined as a specified number of wavelengths of the orange-red light emitted by krypton-86. d. The meter is defined in terms of the standard inch so that 2.54 cm is exactly 1 inch. e. The meter is defined as the distance between precise scratch marks on a certain platinum-iridium bar that is kept under specified conditions. - b. The meter is defined as the distance that light travels in a specified time interval. The radius of the earth is 6,380 kilometers. What is the radius of the earth in centimeters? - 6.38 × 10^8 cm In the calculation of the area of a rectangle with dimensions of 4.282 m by 0.050 m, which of the following answers has the correct number of significant fi