Many supernovas are thought to result in
A) neutron stars. B) regular stars like our sun.
C) red giant stars. D) white dwarfs.
A
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In accord with general relativity, a person living at the top of a skyscraper ages
A) faster than a person on the ground floor. B) slower than a person on the ground floor. C) at the same rate as a person on any floor.
The force of a boxer's punch is greater when it hits a
A) small punching bag. B) heavy punching bag. C) both forces would be the same for the same effort
Adiabatic processes occur in Earth's
A) atmosphere. B) oceans. C) mantle. D) all of the above E) none of the above
An ideal fluid, of density 0.90 × 10^3 kg/m3, flows at 12 m/s through a level pipe with radius of 0.50 cm. The pressure in the fluid is 1.3 × 10^5 N/m2 . This pipe connects to a second level pipe with a radius of 1.5 cm. Find the speed of flow in the second pipe
a. 54 m/s c. 0.67 m/s b. 1.3 m/s d. 0.33 m/s