2018 Paper Flashcards
How to find frequency
Number of wave per second
When it says seismic waves say what
Which specifically
S or P waves
Suggest what the student may have done during the investigation because each angle of reflection to have a range of values
Misjudge the centre of the Ray
State one change the student should make the apparatus if he wants to use the same method to investigate a diffuse reflection
Replace the mirror with an irregular reflecting surface
What extra evidence could be collected to support the ray experiment conclusion
Say specifically different angles that already haven’t been collected you can state one
Weight measured in
N
1000 N in a KN
When the boats propeller push water backwards the boat moves forward. The force on the water causes an equal and opposite force to act on the boat which law is this
Newton’s third law of motion
When drawing a vector diagram what do you need to do
CONVERT BACK SCALE
In a vector diagram do you give the angle or compass directions
ANGLE IN DEGREES
Explain why the velocity of the satellite changes as it orbits the Earth
Gravity causes the satellite to accelerate
Deceleration causes a change in a direction
Velocity changes because direction changes
Why do scientist use different models
Different models are appropriate in different situations
Why do scientists create a new model
New evidence this evidence cannot be explained by an existing model new models explain the new evidence
Which hand for current of a wire
Right
When there is a current in the coil the coil rotate continuously explain why
The sides of the magnet experience of force
The force causes moments that act in the same direction
The 2 halves of the commutator swap from one brush to another
The commutator reverses the current
