CHEMISTRY MIDDLE SCHOOL

A 4 kg rock is rolling 10 m/s find its kinetic energy

Answers

Answer 1
Answer: The answer is 200 J

The kinetic energy (KE) is:
KE = 1/2 m * v²
m - mass of the object
v - velocity of the object

We have:
m = 4 kg
v = 10 m/s

KE = 1/2 * 4 kg * 10² m/s
KE = 200 J

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Can a compound have a molecule with a single atom?? Explain.

Answers

No, a molecule is made up of multiple atoms, so you cannot have a compound of a molecule with a single atom
No because a molecule is made of many atoms

Isotopes called what are used to diagnose disease and to study environmental conditions

Answers

A radioactive tracer, I believe. Someone check that lol.

How does the model of the electromagnetic spectrum benefit the study of science?A. The color of light waves can be changed using the model.
B. It helps create new colors of light in the visible spectrum.
C. It helps compare the applications of electromagnetic waves.
D. The wavelength of light waves can be changed using the model.

Answers

It helps compare the application of electromagnetic wavelength
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Which soil horizon contains a layer of partially weathered or unweathered rock? A. E
B. R
C. O
D. C

Answers

Answer:

B.  R

Explanation:

A layer of partially weathered or unweathered rock is present in R soil horizon

Answer: Option (B)

Explanation: The R-layer represents the unweathered rocks that are located below the surface and is the lowest layer in the soil profile. Here, hard rocks are found which are difficult to break, and are breakable with heavy machineries only. This R-layer makes the foundation of the soil profile that supports the entire overlying series of layers.

Thus, the correct answer is option (B).

What are the elements in group 3 to 12 called?​

Answers

In groups 3-12 the elements are called Transition metals
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.A diorama is a type of model. Marcy built a diorama of a forest. She put small models of trees, birds, and deer in the diorama. She also put rocks and moss on the bottom of her diorama. What does her diorama represent?

a museum display
an ecosystem
an animal
distances across Earth's surface

Answers


The diorama represents an ecosystem

Answer:

C I took this test yesterday

Explanation:
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