CHEMISTRY MIDDLE SCHOOL

Who was the firt person to use the word "cell"?​

Answers

Answer 1
Answer:

Answer:

Robert Hooke

Explanation:
Answer 2
Answer:

Answer:

Robert Hooke is the first person

Explanation:

Robert Hooke made his own microscope, which he made himself, and observed some small pieces of cork underneath it. This is where he fist viewed and named the cells.

Hope this helps! ☻

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Help please Isabella was standing directly below a power line, and her compass failed to give an accurate reading.

How could she explain why her compass was not working?

A

A compass works with a magnetic field, and the electric current running through the lines above it would interfere with the magnetic field.


B

The compass works because of an electric field, and the electric current running through the lines above would interfere with the electric field.


C

The compass works because of a gravitational field, and the magnetic current running through the lines above would interfere with the gravitational field.


D

A compass works because of a magnetic field, and the magnetic current running through the power lines above it would interfere with the magnetic field below it.

Answers

a compass works with magnetic field the answer is d

15. Frog lungs are poorly developed. How does this relate to their skin being thin and moist?

Answers

The answer is that they havent reached their full form yet.
Frog's lungs are inside their body (I believe), but their skin has nothing to do with their lungs so their skin can be thin and moist but their inside might be a whole other story ^_^

What are the three states in which most matter occurs

Answers

solid, liquid, and gas.
Solids, liquids, gas'

How do the particles that are dispersed in a colloid differ from the particles suspended in a suspension?The colloid particles are less dense.

The colloid particles are more solid.

The colloid particles are smaller.

The colloid particles are larger.

Answers

Answer: The correct option is that the colloid particles are smaller.

Explanation: There are 3 types of solutions:

1) True solutions: These are the solutions in which the size of the particles are less than 1nm. These are considered as homogeneous mixtures.

2) Colloids: These solutions are the solutions in which the size of the particles lie in the range of 100nm to 1nm. These are assumed to be homogeneous mixtures but actually are heterogeneous mixtures.

3) Suspension: These solutions are the solutions in which the size of the particles are greater than 100 nm. These are considered as homogeneous mixtures.

The particles which are dispersed in a colloid have smaller particles than the particles which are dispersed in a suspension.

Assume that each tablet's mass was 1,000 mg, and remember that you used 0.200 L of water each time. Compute the reaction rate to the nearest whole number using the formula below.

Answers

Answer:

For every temperature you use the formula given by the question.

at 3°C you have:

Reaction rate = (1000/0.2)/138.5 = 36 mg/L/sec

at 24°C you have:

Reaction rate = (1000/0.2)/34.2 = 146 mg/L/sec

at 40°C you have:

Reaction rate = (1000/0.2)/26.3 = 190 mg/L/sec

at 65°C you have:

Reaction rate = (1000/0.2)/14.2 = 352 mg/L/sec

Explanation:

Answer:

see below

Explanation:

3°C: 36

24°C: 146

40°C: 190

65°C: 352

Full table: 145

Eight pieces: 173

Tiny pieces: 216

Cohesion describes water's

Answers

Cohesion describes the 'sticking together of water molecules' 

Answer:

Attraction to other water molecules

Explanation:

Hope it helped!
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