Answer:
ex. where you are standing now
a perspective that one uses to determine if an object is moving.
Explanation:
in physics, a frame of reference, or reference frame, is a perspective that one uses to determine if an object is moving. ... For example, when you see a ball roll down a street, you can tell the ball is moving because the frame of reference is the streets, whatever may be on the side of the roads, or the Earth.
wikipedia
Answer:
open clusters are A.no more than a few thousand stars, B.disorganized, F loose
globular clusters are C.tightly packed, D.more than a million stars, E.made of older stars
Explanation:
Globular clusters are old clusters of stars that have remained in a gravitationally bound system. These clusters are usually roughly spherical and can contain anywhere from a few thousand to a million stars.
Globular clusters are found in our galaxy’s spherical halo, so they are distributed above, below, and level with the plane of our flat, disk-shaped Milky Way.
Open clusters are much younger and smaller than globular clusters. They are the recent birthplaces of new stars, which form out of clouds of dust and gas, and contain only hundreds or thousands of stars. Though the stars in an open cluster formed together out of the same material, they do not remain gravitationally bound over time and spread out, scattering their stars far and wide. Because they are not gravitationally bound, these clusters can have random and irregular shapes. They are located in the plane of our galaxy, along the spiral arms where the gas and dust in the Milky Way
Gamma rays
Explanation:
In a nuclear reaction product that has the least mass is gamma rays.
There are three types of ionizing radiation produced in nuclear reactions. They are:
- Alpha particles
- Beta particles
- Gamma rays
Alpha particles are heaviest followed by beta particles. Gamma rays have no mass.
- A gamma ray is a form of electromagnetic radiation
- It has no charge and mass
Learn more:
Gamma rays brainly.com/question/10726711
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Definitions;
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3. Ligament
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7. Joint
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9. Spongy Bone
10. Skeletal System
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12. Bone Marrow
