Which statements define factors that contribute to the decline of Roman Empire

what is the average speed of (a) a car that travels 400m in 20s. and (b) an athlete who runs 1500m in 4 minutes

Which single force acts on an object in free fall

What would be the final size of a balloon, at - 18*C, if the initial volume is 2.0 L and the initial temperature is 20*C?

based on the creation of natural elements, what is most likely to be important to the modern iroquois culture?

On reducing the volume of gas at constant temperature the pressure of gas increases why

Power=170 watts time=20 seconds

What is the charge of alpha, beta and gamma rays?

A pair of scissors is a complex machine. what simple machines make up a pair of scissors?

Methane gas absorbs red light, and methane clouds reflect blue light, giving Uranus and Neptune their distinctive blue colors. Why do Uranus and Neptune have methane clouds, but Jupiter and Saturn do not

A car traveled 1025 kilometers from El Paso to Dallas in 13.5 hours. What was it's average velocity?