Recent activity by Renfei Song

Recent activity by Renfei Song

If a black hole is "black, and dark" how can we find them in the dark, vast, cold space?

asked Dec 6, 2023

1 answer 53.4k views

1 14 แ li ! 14 badute Value ineguanten NM แจls แทนเจ 1 ปี 58 หมอยอด | |44| |14 นางอ 24.122 (Mitr 5.1 \\\\\ย - 5 \\

asked Oct 16, 2023

1 answer 83.5k views

If two angles measure 90 and are complementary and congruent, the measure of each angle is

answered Jul 30, 2023

1 answer 131k views

Help me please………..

asked Jun 27, 2023

1 answer 165k views

Expand and simplify the polynomial:Write your answer in the standard form

answered Jun 25, 2023

1 answer 3.4k views

Hey there. Explain JJ Thomson's model.

answered Mar 7, 2023

2 answers 7.2k views

Which of the following levels of organization would INCLUDE EXACTLY two of the other levels? Cells Tissues Organs Organ system

answered Feb 20, 2023

1 answer 108k views

Write the equation of the circle graphed below

asked Jan 16, 2023

1 answer 31.1k views

John has a bookcase with 5 shelves. There are k books on each shelf. Using k , write an expression for the total number of books.

answered Jan 11, 2023

1 answer 12.1k views

In a democracy, how is rule of law regarded?

asked Dec 13, 2022

1 answer 3.6k views

Which of these is not true? A. Atoms of the same elements can have different masses. B. The nucleus of an atom has a positive charge. C. Atoms have isotopes of an element have different numbers of protons.

answered Dec 6, 2022

1 answer 204k views

What is the area of this figure? * 15 m 5 m 8 m 8 m

answered Nov 27, 2022

2 answers 196k views

Which is the most effective format for a high school student who wants to persuade peers to elect him class president ? - an article in the local newspaper - an essay posted around the school - a speech

answered Nov 21, 2022

2 answers 88.6k views

Help me please in this problem Cindy bought 2 boxes of face masks that costs ₱69.75 each box and a gallon of alcohol cost ₱359.95. How much does it cost to buy those items?

answered Nov 18, 2022

1 answer 78.0k views

How do I do this question it is really hard

answered Sep 8, 2022

1 answer 101k views

Boyle's Law represents the relationship of volume as pressure is changed. The constants of Boyle's Law are volume and temperature pressure and volume pressure and temperature temperature and number of

answered Aug 28, 2022

1 answer 65.3k views

What is a triumvirate

asked Aug 22, 2022

1 answer 177k views

In a complete sentence what were the main issues leading to the secession of Southern States from the Union?

answered Aug 20, 2022

2 answers 104k views

Select the correct text in the passage. Which detail best develops the central idea? The Footprints of Time by Charles Bancroft (excerpt from “Section VI. The Roman Republic”)

asked Jul 21, 2022

2 answers 113k views

What does corny person mean?

answered May 13, 2022

2 answers 225k views

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