A helicopter descends from a height of 600 m with uniform negative acceleration, reaching the ground at rest in 5.00 minutes. Determine the acceleration of the helicopter and its initial velocity
?0.013 3 m/s2, ?4.0 m/s
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Neutron stars are supported by _____
a. hydrogen degeneracy pressure
b. neutron degeneracy pressure
c. neutron gas pressure
d. electron degeneracy pressure
e. hydrogen gas pressure
A 4.0 ?F and a 1.0 ?F capacitor are connected in parallel and both are charged with a 12. volt battery. They are disconnected from the battery and reconnected positive side of the 1st to negative side of 2nd, and neg. side of 1st to pos
side of 2nd. (a) How much was each charged when connected to the battery? (b) After reconnecting, how much charge is stored? (c) What potential exists across the final parallel combination?
What is the mass of the black hole believed to be at the center of the Milky Way? How do we know?
What will be an ideal response?
The half-life of 3H is 12 years. About how long does it take for 127/128 of a sample of that radionuclide to decay?
a. 7 years b. 11.9 years c. 12.1 years d. 84 years