1 Measurements

Question 1

7 Base Units

Answer 1

1. Mass
2. Length
3. Time
4. Electric Current
5. Temperature
6. Amount of Substance
7. Luminosity Intensity

Question 2

Tera, T

Answer 2

10^12

Question 3

Giga, G

Answer 3

10^9

Question 4

Mega, M

Answer 4

10^6

Question 5

Kilo, k

Answer 5

10^3

Question 6

Deci, d

Answer 6

10^-1

Question 7

Centi, c

Answer 7

10^-2

Question 8

Milli, m

Answer 8

10^-3

Question 9

Micro, u

Answer 9

10^-6

Question 10

Nano, n

Answer 10

10^-9

Question 11

Pico, p

Answer 11

10^-12

Question 12

Scalar Quantity

Answer 12

Only magnitude

Question 13

Vector Quantity

Answer 13

Magnitude and direction

Question 14

Change in vectors

Answer 14

Final vector - initial vector

Question 15

Systematic vs Random error

Answer 15

Systematic error: Same magnitude and sign
Random error: Different magnitude and sign

Question 16

Accuracy

Answer 16

Closeness of a reading on an instrument to the true value of the quantity

Question 17

Precision

Answer 17

Level of uncertainty in an instrument’s scale
Small spread or scatter

Question 18

Finding uncertainty

Answer 18

∆Q= ∆X+ ∆Y

OR

∆Q/Q= ∆X/X + ∆Y/Y