how far away should a cliff be form a source of sound to give an echo in 5.3 seconds (given speed of sound at 331m/s

If you mix chlorine lithium and nickel together which two elements would be the most reactive

If an object with an initial temperature of 300 k increases its temperature by 1°c every minute, by how many degrees fahrenheit will its temperature have increased in 10 minutes? (a) 6°f (b) 10°f (c) 18°f (d) 30°f

Which planet do you think would be easiest for humans to colonize some day?