Two planets of the same mass are observed.

Which of the following distances between the two planets would result in the least gravitational attraction?

A. 90 light years

B. 80 light years

C. 60 light years

D. 50 light years

An insulated lunch bag keeps food warm by

A glass lens, n glass = 1.52, has a 131 nm thick antireflective film coating one side, n film = 1.25. White light, moving through the air, is perpendicularly incident on the coated side of the lens.

A child sits 6 m away from the center of the merry go round. The centripetal acceleration acting on the child' is 3.6 m/s^2. What is the tangential velocity of the child? A 4.65 m/s B 21.6 C 0.6 m/s D 1.67 m/s

What is the speed of a 2.5-kilogram mass after ot has fallen freely from rest through a distance of 12 meters? a) 4.8 m/s b) 15 m/s c) 30. m/s d) 43 m/s

Which of the following is fact-based science rather than part of a personal belief system?

Teens realize that things may be "shades of gray" after they enter Piaget's social stage. identity crisis stage. menarche stage. formal operational stage.

Technician A says that fractured rods have a unique mating surface and that only the cap that was fractured is the one that will fit that rod. Technician B says that a powdered metal rod is less expensive, lighter, and as strong as a forged rod.

What is the expected wavelength (in cm) of 10.5 ghz microwaves in free space?

There are 5,280 feet in 1 mile and 12 inches in one foot. How many inches are in a mile?

An anion is an atom that has lost electrons. True or False?