A child is riding a merry-go-round that has an instantaneous angular speed of 1.25 rad/s and an angular acceleration of 0.745 rad/s2. The child is standing 4.65 m from the center of the merry-go-round
What is the magnitude of the linear acceleration of the child? A) 8.05 m/s2
B) 7.27 m/s2
C) 2.58 m/s2
D) 3.46 m/s2
E) 4.10 m/s2
A
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Convection in the outer layers of a star like the Sun helps mixing and makes more hydrogen available for burning.
Answer the following statement true (T) or false (F)
During the Carboniferous Period,
A) the carbon dioxide cycle started to operate for the first time B) carbon-rich meteorites impacted the Earth C) the first carbon-based life appeared D) land was covered with dense forests with the appearance of the first insects and amphibians
How long can a 1-solar-mass star live?
a. 0.5 solar lifetimes b. 1 solar lifetime c. 2 solar lifetimes d. 10 solar lifetimes
When a suction cup sticks to a wall it is
A) pulled to the wall by the vacuum. B) pushed to the wall by the atmosphere. C) both of these D) neither of these