The pendulum, in a wall clock, is a 'seconds pendulum', i. e., has a time period of 2s. The 'effective length' of a simple pendulum, that has the same time period, is nearly

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) ! : )

Frequency of electromagnetic waves that a radio station is assigned is called

What happens when the number of protons in an atom changes