a pendulum of length 130cm has a period of oscillation. the bulb is pulled and released to move in a horizontal circle of radius 50cmm if the period of ratation is T2, calculate the ratio T1:T2

Describe different biomes. what are some adaptations that organisms (plants or animals) must have to live in each biome?

Why is rain likely when warm, moisture-laden air meets cold air? a) the lighter warm air will rise and cool down, causing condensation and rain. b) the cold air moves faster and pushes the warm air away, causing condensation and rain. c) the moisture in the warm air condenses on contact with the cold air, causing rain to fall. d) the cold air mixes with the warm air, reducing its temperature causing moisture to condense.

If a star is moving toward earth, it is