Recent activity by David Lu

Recent activity by David Lu

How do the lattice enthalpies of NaCl and NaF compare?

answered Dec 29, 2024

1 answer 225k views

Going against authority whether by testing limits that parents set, or adopting styles of fashion or grooming that are not understood by adults. a) True b) False

answered Dec 27, 2024

1 answer 46.9k views

List and explain the reasons and motives that Pope urban II gives Christians to fight in the crusades.

asked Dec 15, 2024

1 answer 152k views

Is Salmonella Typhi able to "hide"?

answered Dec 4, 2024

1 answer 225k views

The probability that a bomb dropped from an envelope will strike a certain target is 51. If 6 bombs are dropped, find the probability that: (i) Exactly 2 will strike the target (ii) At least 2 will strike

asked Nov 16, 2024

1 answer 122k views

J'habite à Londres. C'est une g et la c Pla ola de l'Angleterre.

answered Oct 25, 2024

1 answer 112k views

Can someone please help me really quick

answered Sep 20, 2024

1 answer 205k views

Roberta is home alone with her 2-year-old son having a serious asthma attack. What is the first step Roberta should take? a) Administer First Aid b) Call Emergency Services c) Perform CPR d) Comfort the

asked Aug 10, 2024

1 answer 36.9k views

Is a 4x3 matrix linearly independent or dependent? How many pivot columns must a 5x7 matrix have if its columns span in R^5? why? The columns of any 4x5 matrix is linearly dependent. a.true b.false

answered May 18, 2024

1 answer 24.7k views

What two states were connected by the transcontinental railroad in 1869? Responses Texas and Kansas California and Nebraska Oregon and Illinois Washington and Minnesota

answered Apr 24, 2024

2 answers 189k views

Which of the following sentences from "A Meeting in the Dark" best supports the theme of powerlessness? (1 point) O "Everyone knew that, though a clergyman's son, John would never betray the tribe." O

answered Mar 18, 2024

1 answer 177k views

Distinguish between hydrophilic and hydrophobic molecules. a. Hydrophilic molecules are inorganic, whereas hydrophobic molecules are organic. b. Hydrophilic molecules are attracted to water, whereas hydrophobic

asked Feb 14, 2024

1 answer 89.0k views

Need help asappppppppp

asked Dec 25, 2023

1 answer 74.6k views

I have the picture of the equation problem. please help solve the evaluate natural logarithm and express the answer in terms of decimals part please thank you

asked Nov 26, 2023

1 answer 125k views

Can someone please help me? :(

asked Nov 13, 2023

1 answer 19.0k views

Find the missing angle for the irregular polygon. show your work.

asked Nov 10, 2023

1 answer 199k views

There is a population of 10,000 bacteria in a colony. If the number of bacteria doubles every 260 hours, what will the population be 780 hours from now?

answered Aug 16, 2023

1 answer 149k views

What was one of the three compromises on slavery that was added to the constitution?

asked Aug 8, 2023

1 answer 94.4k views

Use the given endpoint R and the midpoint M of segment RS to find the coordinates of the other endpoint S. (Hint: Use the midpoint formula to find the other endpoint.) **Make sure to state your answer

asked Jul 2, 2023

1 answer 99.4k views

While you are standing in front of a wall, you clap your hands and you can clearly hear an echo from the wall after 1.4 seconds. The speed of sound in air is 343M/S. Approximately how far are you standing

asked Mar 8, 2023

1 answer 143k views

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