pp correction flash cards

Question 1

formula for gradient of tangent

Answer 1

y2-y1/ x2-x1

Question 2

what can measure mass correctly whn used on moon
1) spring balance
2) toppan balance
3) pivoted beam
4) two pan balance

Answer 2

2 pan balance and pivoted beam

Question 3

newton third law forces
1) type of forces
2) objects they are acting on

Answer 3

1) same
2) diffrent

Question 4

movement of particles that flow in conductor
1) direction
2) type of particle

Answer 4

1) negative to positive terminal
2) electrons

Question 5

what doesn’t hv an affect on magnitude of emf across coil

Answer 5

reversing poles of magnet
( changing height from why coil is dropped changes magnitude of emf )

Question 6

cycle of star steps in order

Answer 6

1) internal gravitational force increases temp (protostar)
2) inward and outward forces balanced (star)
3) all hydrogen converted to helium
4) expands (red giant)

Question 7

block moving at constant speed
direction and magnitude of friction and force

Answer 7

-magnitude friction and force equal (constant speed)
- directions opposite

Question 8

moment force and distance relation

Answer 8

distance from pivot perpendicular to direction of force

Question 9

fast cooling method for sealed bottle

Answer 9

wrap with wet paper and put in breeze

Question 10

image made by mirror

Answer 10

virtual (cant be projected on screen)
and upright

Question 11

what happens when inside glass angle of incidence is equal to angle of reflection

Answer 11

total internal reflection