An amusement park ride consists of a rotat- ing circular platform 6.9 m in diameter from
which 10 kg seats are suspended at the end of
2.5 m massless chains. When the system ro-
tates, the chains make an angle of 39.3° with
the vertical.
The acceleration of gravity is 9.8 m/s2.
O
What is the speed of each seat?
Answer in units of m/s.

The chemical effect of the endocrine system is longer lasting than the chemical effect of the nervous system. select the best answer from the choices provided t f

Afisherman notices that his boat is moving up and down periodically without any horizontal motion, owing to waves on the surface of the water. it takes a time of 2.20 s for the boat to travel from its highest point to its lowest, a total distance of 0.670 m . the fisherman sees that the wave crests are spaced a horizontal distance of 5.80 m apart. (a) how much is the wavelength? (b) find the period of the wave. (c) how fast are the waves traveling? (d) what is the amplitude a of each wave?

How does an observation about an object differ from an inference about that object