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mart [117]
2 years ago
7

Define the unit of time and unit of length​

Physics
2 answers:
garik1379 [7]2 years ago
7 0
This is your perfect answer

The base unit for time is the second (the other SI units are: metre for length, kilogram for mass, ampere for electric current, kelvin for temperature, candela for luminous intensity, and mole for the amount of substance). The second can be abbreviated as s or sec.
djyliett [7]2 years ago
6 0

Answer:

hope you like

Explanation:

A unit of time is any particular time interval, used as a standard way of measuring or expressing duration.Its SI unit is second

A unit of length refers to any arbitrarily chosen and accepted reference standard for measurement of length. Its SI unit is meter

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A

Explanation:

I just did the test

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3 years ago
Two atoms that are isotopes of one another must have the same number of what?
fredd [130]

Answer:

B

Explanation:

Two atoms which are isotopes of one another must have a different number of neutrons.

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3 years ago
A virtual image is formed 17.0 cm from a concave mirror having a radius of curvature of 39.0 cm. (a) Find the position of the ob
Wittaler [7]

Explanation:

Image distance, v = -17 cm (-ve for virtual image)

Radius of curvature of concave mirror, R = 39 cm

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(a) Using mirror's formula as :

\dfrac{1}{v}+\dfrac{1}{u}=\dfrac{1}{f}

\dfrac{1}{u}=\dfrac{1}{f}-\dfrac{1}{v}

\dfrac{1}{u}=\dfrac{1}{-19.5}-\dfrac{1}{(-17)}  

u = 132.6 cm    

So, the object is placed 132.6 cm in front of the mirror.

(b) Magnification of the  mirror, m=\dfrac{-v}{u}

m=\dfrac{-17}{132.6}

m = -0.128

Hence, this is the required solution.

7 0
3 years ago
How far will you travel if you walk for 10.0 minutes at a speed of 1.50 m/s?
fredd [130]

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7 0
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Which statement correctly compares infrared light to ultraviolet light
allochka39001 [22]
I am fairly certain it's D. Good luck!
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3 years ago
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