P7.3

Question 1

what are the prefixes that make units bigger?

Answer 1

-Tera
-Giga
-Mega
-Kilo

Question 2

what are the prefixes that make units smaller?

Answer 2

-Centi
-Deci
-Mili
-Micro
-Nano
-Pico

Question 3

Tera

Answer 3

10^12

Question 4

Giga

Answer 4

10^9

Question 5

Mega

Answer 5

10^6

Question 6

Kilo

Answer 6

10^3

Question 7

Centi

Answer 7

10^-2

Question 8

Deci

Answer 8

10^-1

Question 9

Mili

Answer 9

10^-3

Question 10

Micro

Answer 10

10^-6

Question 11

Nano

Answer 11

10^-9

Question 12

Pico

Answer 12

10^-12

Question 13

power

Answer 13

the amount of energy transferred per second

Question 14

what is power measured in?

Answer 14

Joules/second or Watts

Question 15

what is the power equation?

Answer 15

energy / time

Question 16

power rating

Answer 16

the rate at which an appliance transfers energy

Question 17

what unit do we use for the domestic use of electricity?

Answer 17

kilowatt-hour

Question 18

what is the equation for energy transferred?

Answer 18

energy transferred = power x time

Question 19

equation for energy transferred in stretching?

Answer 19

0.5 x spring constant x extension

Question 20

equation for gravitational potential energy?

Answer 20

mass x height x gravitational field strength

Question 21

equation for kinetic energy?

Answer 21

0.5 x mass x speed^2