An ideal spring is hung vertically from the ceiling. the spring constant is k = 125 n/m. a block of mass m = 650 g (1000 g = 1 kg) is then attached to the free end and block extends the spring under its weight until it stops moving. calculate the maximum extension of the spring due to the block. (hint: when the system comes to equilibrium, the net force on the block must be zer0.)

Arock is dropped from a cliff and reaches the ground in 2.70s. at the same time another rock is thrown horizontally from the same height with initial x velocity of 0.95 m/s. what distance will in x will the second rock cover?

An object with initial temperature 130 ∘ f is submerged in large tank of water whose temperature is 50 ∘ f . find a formula for f ( t ) , the temperature of the object after t minutes, if the cooling constant is k = − 0.2 . remember newton's law of cooling (the rate of change of temperature with respect to time is equal to k times the difference between the temperature of the object and the surrounding temperature) ! : )

What causes the development of most clouds and precipitation in the atmosphere?