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Sladkaya [172]
3 years ago
7

Which statements accurately describe matter? Check all that apply. Only living things are made up of matter. Matter is made up o

f tiny particles called atoms. Atoms were discovered in the twenty-first century. Atoms cannot be divided and still retain the properties of its original state. A single atom can be seen only with a standard microscope.
Physics
2 answers:
harkovskaia [24]3 years ago
7 0
The answer is "matter is made up of tiny particles called atoms"
TEA [102]3 years ago
6 0

Answer:

Matter is made up of tiny particles called atoms

Explanation:

All the things, whether living or non-living, are made up of matter. Matter is composed of tiny particles known as atom. Atoms were discovered in 19th century. Atoms are composed of subatomic particles- electrons, protons and neutrons. An atom cannot be observed using a standard microscope as it is very tiny. It can be viewed under an electron microscope.

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What is the best reason for having a strong hypothesis?
Elena-2011 [213]

Answer:

the answer is C

Explanation:

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7 0
2 years ago
Un pintor de 75.0 kg sube por una escalera de 2.75 m que está inclinada contra una pared vertical. La escalera forma un ángulo d
dezoksy [38]

Answer:

Work done, W = 1786.17J

Explanation:

The question says "A 75.0-kg painter climbs a 2.75-m ladder that is leaning against a vertical wall. The ladder makes an angle of 30.0 ° with the wall. How much work (in Joules) does gravity do on the painter? "

Mass of a painter, m = 75 kg

He climbs 2.75-m ladder that is leaning against a vertical wall.

The ladder makes an angle of 30 degrees with the wall.

We need to find the work done by the gravity on the painter.

The angle between the weight of the painter and the displacement is :

θ = 180 - 30

= 150°

The work done by the gravity is given by :

W=Fd\cos\theta\\\\=75\times 10\times 2.75\times \cos30\\\\=1786.17\ J

Hence, the required work done is 1786.17 J.

6 0
2 years ago
What are some similarities between electricity and gravity?
kow [346]
Similarity : inverse square law for strength of force compared with distance. 
5 0
3 years ago
Derive the value of electric field due to a uniform sphere of charge.
Deffense [45]
<h2>Hey there!</h2>

The Force "F" applied on the unit electric charge "q" at a point describes the electric field.

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4 0
2 years ago
if a torque of 55.0 N/m is required and the largest force that can be exerted by you is 135 N what is th e length of the lever a
Whitepunk [10]

Answer:

r=0.41m

Explanation:

Torque is defined as the cross product between the position vector ( the lever arm vector connecting the origin to the point of force application) and the force vector.

\tau=r\times F

Due to the definition of cross product, the magnitude of the torque is given by:

\tau=rFsin\theta

Where \theta is the angle between the force and lever arm vectors. So, the length of the lever arm (r) is minimun when sin\theta is equal to one, solving for r:

r=\frac{\tau}{F}\\r=\frac{55\frac{N}{m}}{135N}\\r=0.41m

7 0
2 years ago
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