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Andrews [41]
3 years ago
11

How are coal types classified?

Physics
2 answers:
rosijanka [135]3 years ago
7 0
It’s carbon and it’s heat value
photoshop1234 [79]3 years ago
3 0

Answer:

I believe its B....<u>"Carbon Content and Heat Value"</u>

Explanation:

Coal is classified into four main types, or ranks: anthracite, bituminous, subbituminous, and lignite. The ranking depends on the types and amounts of carbon the coal contains and on the amount of heat energy the coal can produce.

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An object has a coefficient of kinetic friction of 0.2 and a normal force of 30N. Find the force of kinetic friction.
shutvik [7]

Answer:

Force of kinetic friction, Fk = 6N

Explanation:

Given the following data;

Coefficient of kinetic friction, μ = 0.2

Normal force, Fn=30N

To find the Force of kinetic friction;

Mathematically, the force of kinetic friction is given by the formula;

Fk = μFn

Where;

  • Fk represents the force of kinetic friction.
  • μ represents the coefficient of friction.
  • Fn represents the normal force.

Substituting into the equation, we have;

Fk = 0.2*30

Fk = 6N

Therefore, the force of kinetic friction is 6N.

6 0
3 years ago
How far would a horse that rides at 8.1 m/s travel and 8.5 minutes
Xelga [282]
V = S/t

The time is in minutes, it needs to be converted to seconds, because the Velocity 8.1meters/second.

1 min -------- 60 secs
8.5 min -------- x secs
-> x = 8.5 . 60
-> x = 510secs

-> 8.1 = S/510
-> 510 x 8.1 = S
-> S = 4131 meters
3 0
4 years ago
What were two reasons that the Krystal Beslanowitch case was finally closed?
lesantik [10]

Answer:

1. Police Weren't Able To Find Any Real Leads

2. They Didn't Find Any Clues To The Killer Until 18 Years Later

Explanation:

It was unknown at the time, but it would go on to take 18 years for her killer to be arrested and tried for her death. The initial case went on from 1995 to 1997 but ended up closing when the police department was unable to find any real leads.

7 0
2 years ago
0.00005 centimeters equals how many meters???
larisa86 [58]

Answer:

0.0000005

Explanation:

4 0
3 years ago
What is a prediction
faust18 [17]
An educated guess about something. (What might happen in the future)
7 0
3 years ago
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