PLEASEPLEASEPLEASE HEL which pair of properties apply to both mechanical and electromagnetic waves?
a. both waves carry energy and refract
b. both waves are longitudinal and refract
c. bothe waves are transverse and carry matter from on place to another
d. bothe waves carry energy and do not need a medium to travel through

Suppose a comet has an orbital period of 309.1 years around the sun. what is it’s average distance from the sun?

Amoving company collects data about couches they move and displays the data in a table. the force along the ramp, the angle of the ramp, and the height the couch is raised to are shown. which statements correctly compare the work done to move the couches? check all that apply. the same amount of work is done for couches 1 and 3. the same amount of work is done for couches 2 and 3. the work for couch 1 is greater than the work for couch 2. the work for couch 2 is less than the work for couch 3. the work for couch 3 is greater than the work for couch 1. the work for couch 2 is greater than the work for couch 1.

Which are true about beta reactions? there will be more than one answer. a. it has no change b. it doesn't change the mass of the number c. it has a mass of 0.0005 atoms d. it causes transmutation.