physics

Question 1

waves with a short wavelength have?

Answer 1

high frequency and energy

Question 2

waves with a long wavelengths have

Answer 2

low frequency and energy

Question 3

name the electromagnetic spectrum in order

Answer 3

radio waves, microwaves, inferred, viable light, ultra violet, x-rays, gamma rays

Question 4

what’s a transverse wave

Answer 4

particles vibrate at right angles

Question 5

what’s a longitudinal wave

Answer 5

particles vibrate parallel to the direction of the wave

Question 6

whats frequency

Answer 6

the number of waves passing a point

Question 7

how to calculate speed?

Answer 7

speed = distance
———-
time

Question 8

what’s the wave equation?

Answer 8

velocity = frequency x wavelength

Question 9

how to calculate momentum

Answer 9

momentum = mass x velocity

kg = kg x m/s

Question 10

what does P stand for in the triangle: p
m x v

Answer 10

momentum

Question 11

give examples of breaking distance

Answer 11

size of car

wet roads

foggy weather

Question 12

give examples of thinking distance

Answer 12

old age

mobile phone usage

drugs/ smoking

Question 13

distance travelled=

Answer 13

average speed x time

Question 14

acceleration =

Answer 14

final velocity(speed) - initial velocity
————————————————-
time ( s)

Question 15

force=

Answer 15

mass(kg) x acceleration ( m/s ) ²

Question 16

weight=

Answer 16

mass (kg) x gravitational field strength (N/kg)

Question 17

KE =

Answer 17

1/2 x m x v ²

Question 18

p =

Answer 18

m x v

Question 19

v=

Answer 19

distance
————
time

Question 20

what are the products of photosynthesis

Answer 20

glucose and oxygen

Question 21

give one reason why cells could be stained

Answer 21

concentrated salty solution would make it clearer

Question 22

explain why a cytoplasm shrinks when in salt solution

Answer 22

the sycophants shrink away because the salt solution is too strong therefore making the cell weaker1.

Question 23

write the balanced equation of HCL

Answer 23

H₂ + Cl₂ = 2HCL

Question 24

How do you calculate Rf value ?

Answer 24

compound distance
—————————-
solvent distance

eg . 2.3
———-
8. = 0/29

Question 25

vectors have size and …

Answer 25

distance

Question 26

scalers have only…

Answer 26

mass

Question 27

GPE=

Answer 27

m x g x h