A fossil is found in a layer of strata below one layer dated at 8 million years. From this we can deduce the age of the fossil to be

A) between 7 and 8 million years old
B) we can tell nothing about the fossil's age from this data
C) older than 8 million years
D) younger than 7 million years


C

Physics & Space Science

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Length Contraction: A spaceship with a constant velocity of 0.800c relative to Earth travels to the star that is 4.30 light-years from Earth. What distance does the space ship travel as measured by a passenger on the ship?

A. 2.58 light-years B. 3.52 light-years C. 4.12 light-years D. 4.30 light-years

Physics & Space Science

Alcohol is less dense than water. If alcohol is used to make a barometer at normal atmospheric pressure, the height of the alcohol column would be

A) less than 10.3 m. B) 10.3 m. C) more than 10.3 m.

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Why are there no small craters on the surface of Venus? a. The thick atmosphere protects the surface from small meteorites

b. Old surfaces have been subducted by convection currents. c. Venus formed after the heavy bombardment period. d. Weathering and erosion removed all craters. e. Shield volcanoes prevent small craters to remain on exist on the surface.

Physics & Space Science

A motorist travels for 3.0 h at 80 km/h and 2.0 h at 100 km/h. What is her average speed for the trip?

A) 92 km/h B) 90 km/h C) 85 km/h D) 88 km/h

Physics & Space Science