On a warm summer day (33 ∘C) , it takes 4.70s for an echo to return from a cliff across a lake. On a winter day, it takes 5.10s. The speed of sound in air is v≈(331+0.60T) m/s, where T is the temperature in ∘C. What is the temperature on the winter day?

Abucket full of water weights 4 kg and water well is 10m deep. a girl draws water from the well. it takes the girl 3 minutes to draw a bucket full of water from the well. what is the power of the girl?

What organization and environment is described above?

Suppose a force of 60 n is required to stretch and hold a spring 0.1 m from its equilibrium position. a. assuming the spring obeys hooke's law, find the spring constant k. b. how much work is required to compress the spring 0.5 m from its equilibrium position? c. how much work is required to stretch the spring 0.6 m from its equilibrium position? d. how much additional work is required to stretch the spring 0.1 m if it has already been stretched 0.1 m from its equilibrium? a. kequals 600