If an object straight down falls 30m in 2 sec , how far will falls in 4 sec , what is the tail wind and headwind​

What is the frequency of a light wave with a wavelength of 620nm

In which of the following cases is work being done on an object? question 2 options: pushing against a locked door carrying a box down a corridor pulling a trailer up a hill suspending a heavy weight with a strong

If an astronaut takes an object to the moon the following is true (choose only one). a the mass will change but the weight will be the same. b both the mass and the weight of the object will be the same. c the weight will change but the mass will be the same. d both the mass and the weight of the object will change.