Algol consists of a 3.7 msun main-sequence star and a 0.8 msun subgiant. why does this seem surprising, at least at first?

The velocity of any wave can be calculated from its frequency and wavelength. How fast (in meters per second) is a wave moving if its six waves go by in a second and its wavelength is two meters? A. 1/3 B. 3 C. 8 D. 12

Why does the quantity of helium found in the universe support the big bang theory? A. The amount found matches the amount that is necessary to prove quantization of light and matter. B.

Which is a diatomic molecule? A. Ar B. CO C. CO2 D. NaCl

Use the drop-down menus to identify the parts of DNA. Label A: Label B:

A closed container is filled with oxygen. The pressure in the container is 245 kPa. What is the pressure in millimeters of mercury? Express the pressure numerically in millimeters

An object is moving east, and its velocity changes from 65 m/s to 25 m/s in 10 seconds. Which describes the acceleration? 4 m/s2 in negative acceleration 4 m/s2 in positive acceleration 9 m/s2 in positive acceleration 9 m/s2 in negative acceleration

Two students walk in the same direction along a straight path at a constant speed-one at 0.90 m/s and the other at 1.90 m/s. •How far would the students have to walk so that the faster student arrives 5.50 min before the slower student? A.) 460s B.

During the process of accretion, each planet-in-the-making, or proto-planet, grew in size and mass. The amount of gravity for the proto-planets is best represented by which graph?

Theories and Laws. • How are they alike? • How are they different? • Can you explain why scientific theories will change over time? • Give an example of a scientific theory that has changed.

If the x-component of a force vector is 5.17 newtons and its y-component is 8.80 newtons, then what is its magnitude?