Two ropes are attached to a 50-kg object. The first rope applies a force of 35 N and the second, 55 N. If the two ropes are perpendicular to each other, what is the resultant acceleration of the object?
a. 1.3 m/s2
b. 35 m/s2
c. 1.8 m/s2
d. 65 m/s2
e. 0.77 m/s2
a
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The ____ is responsible for binding the electrons to the nucleus
a. Kirchhoff's law b. ground state c. temperature d. Coulomb force e. Balmer series
This diagram shows the "tree of life" based on genetic studies of relationships between living organisms. Which statement about the tree of life is not true?
A) It shows that plants and animals are the two most dominant forms of life on Earth today. B) It shows that all organisms alive today bear genetic similarities that suggest they evolved from a common ancestor. C) It shows that, based on genetic relationships, there are three major branches of life on Earth. D) It shows that there is greater genetic diversity in microscopic organisms than among animals.
The rings of Uranus and Neptune are found:
A) by the Hubble Space Telescope. B) above their equators. C) in the ecliptic plane. D) outside the Roche limit. E) All of the above.
The expression(s) indicating the mass number of a nucleus is
a. A. b. N. c. Z. d. Z + N. e. A – Z.