Astronauts are weightless inside the International Space Station because
A) the station and the astronauts are constantly falling toward Earth.
B) the station has rockets that fire to counteract Earth's gravity.
C) there is no gravity in space.
D) the station is too far from Earth for gravity to be noticeable.
Answer: A
A) the station and the astronauts are constantly falling toward Earth.
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You are in distant space, where there is no gravity. You hold two blocks of metal. They look and feel identical when touched, but you been informed that one is made of lightweight aluminum and the other of lead
Can you determine which one is lead without doing any kind of chemical analysis? A) You can determine this by dropping them; the lead ball will fall fastest. B) You can determine this by dropping them; the aluminum ball will fall fastest. C) You can determine this, by tapping each block with your finger; the one that accelerates the most is aluminum. D) You can determine this by giving each block a tap with your finger; the one that accelerates the most is the lead. E) The above methods will not work.
The lengthening of the wavelength of a photon as it escapes from a gravitational field is known as__________
A) gravitational blueshift B) gravitational redshift C) photonic adaptation D) photon occultation
What does the IUPAC organization do with
regard to organic chemistry? a) predicts new synthetic hydrocarbon structures b) provides rules for naming complex organic compounds c) helps convert unsaturated hydrocarbons into saturated ones d) tests drugs to make sure that they are safe before they are released
The Arecibo radio telescope is laid out like which optical telescope design?
A) prime focus reflector B) Newtonian reflector C) grazing incidence reflector D) Cassegrain reflector E) Coude reflector