An airplane moving towards the west travels 275 km in 30 minutes. Which option correctly identifies the speed and velocity of the airplane?
o
Speed = 9.17 km/h
Velocity = 9.17 km/h, west
Speed = 550 km/h
Velocity = 550 km/h, west
Speed = 550 km/h, west
Velocity = 550 km/h, west
Speed = 9.17 km/h, west
Velocity = 9.17 km/h

Two friends at different locations want to communicate with each other by sending low energy signals. which of the following methods can they use to communicate? a) produce x-rays using colliding electrons and send them to radios, which capture sound b) send messages using infrared radiation, which travel in the form of waves c) send radio waves through intervening media like radio and television d) produce sound waves using microwaves from heated objects

What is driving behind plate tectonics (plate movment)? a) gravity only b) inertia c) convection and gravity d) the sun theres no option for science so i picked chemistry. plz

For the following, determine the type of reaction and then give products.