Identify the statements which are correct about trademark.

Which of the following always exist between two objects having mass ● elastic force ● contact force ●gravitational force ●magnetic force

Luminous objects such as flashlights emit light that we can see. how do we see an object that isn’t luminous? a. the object emits light that reaches our eyes. b. light reflects off the object and reaches our eyes. c. light passes through the object uninterrupted. d. light is fully absorbed by the object. e. we can’t see an object that isn’t luminous.

What is another way name for bd? cf, bd, cf, be