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Ann [662]
3 years ago
10

Why is a classroom door knob the least infected place in a classroom?

Biology
1 answer:
Nastasia [14]3 years ago
5 0
it is the least touched 
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HELP PLEASE IM STUCK ON THESE QUESTIONS
Diano4ka-milaya [45]

Answer:

a = 10 m/s²

F = 2000 N

m = 8.57 Kg

Explanation:

1) What is the acceleration of a 40 kg object pushed with a force of 400 N?

Acceleration of object = ?

Mass of object = 40 Kg

Force on object = 400 N

Solution:

Formula:

F = ma

by putting values,

400 N = 40 Kg × a

a = 400 N/ 40 Kg   ( N = Kg.m /s²)

a = 10 m/s²

2) What is the force on an 800 kg rock being thrown at 2.5 m/s2?

Acceleration of object = 2.5 m/s²

Mass of object = 800 Kg

Force on object = ?

Solution:

Formula:

F = ma

by putting values,

F = 800 Kg × 2.5 m/s²

F = 2000 Kg. m/s²  ( N = Kg.m /s²)

F = 2000 N

3) What is the mass of a ball being rolled at 3.5 m/s2 from a 30 N force?

Acceleration of object = 3.5 m/s²

Mass of object = ?

Force on object = 30 N

Solution:

Formula:

F = ma

by putting values,

30 N = m ×  3.5 m/s²

m = 30 N / 3.5 m/s²   ( N = Kg.m /s²)

m = 8.57 Kg

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2 years ago
Summarize the nature of science​
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hi can u Help me in my hw, Define the following terms:1)Epicenter 2)Seismograph(don't answer if u don't know the answer plz)​
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Answer:

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Actually it's above the hypocenter.

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the theory of plate tectonics states that the crust of earth is divided into plates which are slowly moving

Explanation:

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 <span>Planets closest approach to the sun is associated with the term perihelion. </span>
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