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brilliants [131]
3 years ago
14

Why mass is called physical quantity​

Physics
1 answer:
Afina-wow [57]3 years ago
8 0

Answer:

A physical quantity is a property of a material or system that can be quantified by measurement

the physical quantity mass can be quantified as n kg were n is some numerical value and kg is unit.

hope it help u

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1) how can you show that atmospheric exerts pressure?
Kruka [31]

Answer:

1. While boiling replace the cap and allow it to cool. Vapours inside condense and form water creating vacuum above them. Observation - The can crumbles due to air pressure from outside. This proves that air exerts pressure.

2. Measure the volume of the liquid displaced when the object is submerged. Measure the initial volume of water in graduated cylinder. Submerge the irregular object. Measure the final volume of the water.

— The difference between the initial volume and the final volume is the volume of the object.

hope can help ^_^

7 0
3 years ago
Name and describe two of the basic characteristics of living organisms
IceJOKER [234]
The basic characteristics of living organisms can be reminded by using DR. R. COG one characteristic for each letter:
D- It has Dna or genetic material in its cells.
R- It has the ability to Reproduce
R- It Responds to the environment, this helps it survive easily
C- The Cell is its basic unit
O- It Obtains energy from some type of source
G- It Grows and develops with the passing of the time
8 0
4 years ago
The half-life of carbon-14 is 5730 if you start with 10 grams and 11,460 years passed by how many grams of carbon-14 will be rem
a_sh-v [17]

Answer:

Explanation:

7 0
3 years ago
Read 2 more answers
The Concorde's exterior is made of aluminum, which has acoefficient of linear expansion of At 15 degrees celsius, the Concorde m
Rom4ik [11]

Answer: D) 28 cm

Explanation:

This problem can be solved by the following equation:

\frac{\Delta L}{L_{o}}= \alpha \Delta T (1)

Where:

\Delta L is the change in the length of the outer skin of the Concorde

L_{o}=62.1 m is the initial length of the outer skin of the Concorde

\alpha=2.40(10)^{-5} \°C^{-1} is the coefficient of linear thermal expansion for aluminium

\Delta T=T_{f}-T_{o}=200\°C - 15\°C=185\°C is the variation in temperature

Isolating \Delta L:

\Delta L=\alpha \Delta T L_{o} (2)

\Delta L=(2.40(10)^{-5} \°C^{-1})(185\°C)(62.1 m) (3)

\Delta L=0.275 m \frac{100 cm}{1m}=27.5 cm (4)

Finally:

\Delta L=27.5 cm \approx 28 cm

3 0
4 years ago
A reading may appear to be different when viewed with one eye or the other, or when the head is moved from side to side or up an
kkurt [141]
<span>This apparent measurement difference is due to a change in position of the observer, and is called "Parallax"

In short, Your Answer would be Option C

Hope this helps!</span>
4 0
3 years ago
Read 2 more answers
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