Meteor add approximately what mass to the Earth each year?
A) a few tons
B) millions of tons
C) thousands of tons
D) tens of thousands of tons
D
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In a physical fitness program, a woman who weighs 510 N runs up four flights of stairs in 22 s. Each flight rises 3.1 m. (1 hp = 746 W)
(a) What is her total change in potential energy? (b) What was the minimum average power (in watts) that she expended during the 22 s? (c) What horsepower motor would be required to generate the same power?
Why would you think twice about ordering from a cafe menu that lists the genus name but not the specific epithet of its offerings? Hint: Look up Homarus americanus, Ursus americanus, Ceanothus americanus, Bufo americanus, Lepus americanus, and Nicrophorus americanus
What will be an ideal response?
The ________ was a particle predicted to exist long before it was observed because energy is not conserved in beta decays without it.
What will be an ideal response?
An image of Mars taken with the Hubble Space Telescope shows a small Northern polar cap and a large Southern Polar cap. What season is it in the Northern hemisphere?
A) spring B) fall C) summer D) winter