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zysi [14]
2 years ago
13

Samples of this drawing medium have been dated back to 30,000 BCE. Group of answer choices silverpoint charcoal pencil color pen

cil pastel
Chemistry
1 answer:
GuDViN [60]2 years ago
7 0

Charcoal is the sample of this drawing medium have been dated back to 30,000 BCE and is denoted as option B.

<h3>What is Charcoal?</h3>

This is referred to a black carbon residue which is heated in insufficient oxygen to give it a light weight.

It is used for drawing and has been in existence for as long as 30,000 BCE hence the reason why it is the most appropriate choice.

Read more about Charcoal here brainly.com/question/22220547

#SPJ1

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The correct mass of a block is 28.0 grams. A chemist measures the block
Sati [7]

Answer:  NOT accurate, but precise.  

[translation:  You screwed up, but did it in style].

Explanation:

The average mass measurement is 41.95g.  Compared to the actual value of 28.0 grams, the measurement is NOT accurate.  

The standard deviation for the data is 0.112.  Dependiong on your definition of precision, this looks relatively good.  I would go for precise.  

3 0
2 years ago
I need help on this science question
ICE Princess25 [194]

Answer:

C

Explanation:

The kinetic energy of a body is the energy due to the motion of a body. It is mathematically given as;

 Kinetic energy  = \frac{1}{2} m v²

m is the mass of the body

v is the velocity

 Now, let us find the K.E from the given choices;

Option C will have the greatest kinetic energy;

         mass  = 0.14kg , v  = 40m/s

 Kinetic energy  = \frac{1}{2} x 0.14 x 40²   = 112J

5 0
3 years ago
The density of human blood is 1.06g/ml the volume is 5.5l what is the mass in kg
kondor19780726 [428]

The mass of the blood is 5.8 kg.

<em>V</em> = 5.5 L = 5500 mL

Mass = 5500 mL × (1.06 g/1 mL) = 5800 g = 5.8 kg

6 0
3 years ago
Yo mismo no hablo español, así que espero que esto sea realmente legible--
Deffense [45]

Answer:

what

Explanation:

4 0
3 years ago
Read 2 more answers
Electromagnetic waves are used in many technological devices. Describe two examples of how energy from electromagnetic waves is
kykrilka [37]

Answer:

Electromagnetic waves are ubiquitous in nature (i.e., light) and used in modern technology—AM and FM radio, cordless and cellular phones, garage door openers, wireless networks, radar, microwave ovens, etc. These and many more such devices use electromagnetic waves to transmit data and signals.

Explanation:

i mean there's alot of stuff that have Electromagnetic waves in it i mean alot!

3 0
3 years ago
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