What is the name of the following ionic compound SnSe2

Scientists used to believe that the earth was the center of the universe. which invention was primarily responsible for obtaining evidence against this? a. sextant b. astrolabe c. hubble telescope d. optical telescope

An object has a mass of 1kg on Earth. What is its weight on the moon?

Researchers aboard the H. M. S. Challenger discovered over 4000 new species of marine life. true or false

The cyclist has a mass of 50 kg and is accelerating at 0.9 m/s^2. what is the size of the unbalanced force F acting on the cyclist?

When checking the charging system on a late-model vehicle: Technician A connects a scan tool to monitor the system voltage output. Technician B connects a scan tool to retrieve any DTCs that may be in the system. Who is correct:a. Technician Ab.

Show that the Newton has the units of mass times acceleration.

Light travels at 150000000km from the sun to earth in 8 minutes. What speed is this in Km/s

Electricity problem (coulomb's law)

An observer (O) spots a plane (P) taking off from a local airport and flying at a 29° angle horizontal to her line of sight and located directly above a tower (T). The observer also notices a bird (B) circling directly above her.

In order for convection to occur, you must have