…………………….. The idea of making electromagnet is to
Change magnetic energy to mechanical energy
Change magnetic energy to electric energy
Change electric energy to magnetic energy
Change mechanical energy to electric energy
……………… we can obtain electric energy from the following except
nuclear energy
electric generator
dynamo
electric motor
discovered the earth gravitational……………..
Ohm
Nobel
Berzelius
Newton
…………. All the following are from fundamental forces in nature except
inertia
electromagnetic
gravitational
nuclear
…………… the electromagnet is used in
electric bell
night vision
microscope
calculator
Weight affects………….of the object
center
middle
bottom
top
………………. When you kick a static ball with your foot, force acts on the ball by changing
State of ball in motion
Direction om ball’s motiona and State of ball in motion
Direction om ball’s motion
Mass of ball
……………….. Strong nuclear force is used in
scientific researches
industry
producing electricity
medicine
…………… Electric motor in used in making
radio
watch
mixer
………………………. A force is an effect that
may changes the state of object in motion
never changes the state of object in motion
Always changes the state of object in motion
Always changes both state and direction of object in motion
…………….. multiplying of the object’s mass by earth’s gravitational acceleration equals
object’s volume
object’s area
object’s mass
object’s weight
………….. The work done to lift a ball increases by increasing
area
density
volume
mass
>>>>>>> Earth’s gravitational acceleration is changed from a place to another because of the
Distance from the earth’s center
Object’s mass
Earth’s mass
None of the previous
………………. The odd word is
weight
acceleration
work
if the mass of an object is 2kg and the earth gravitational acceleration is 10m/sec2. It’s weight is………….nweton
10
30
40
20